BAS-341HN/BAS-342H Instruction Manual

BAS-341HN/BAS-342H Instruction Manual
BAS-341H
BAS-342H
INSTRUCTION MANUAL
Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
DIRECT DRIVE
PROGRAMMABLE ELECTRONIC PATTERN SEWER
Thank you very much for buying a BROTHER sewing machine. Before using your new machine,
please read the safety instructions below and the explanations given in the instruction manual.
With industrial sewing machines, it is normal to carry out work while positioned directly in front of
moving parts such as the needle and thread take-up lever, and consequently there is always a
danger of injury that can be caused by these parts. Follow the instructions from training personnel
and instructors regarding safe and correct operation before operating the machine so that you will
know how to use it correctly.
BAS-341H, BAS-342H
SAFETY INSTRUCTIONS
[1] Safety indications and their meanings
This instruction manual and the indications and symbols that are used on the machine itself are provided in order to ensure
safe operation of this machine and to prevent accidents and injury to yourself or other people.
The meanings of these indications and symbols are given below.
Indications
DANGER
The instructions which follow this term indicate situations where failure to follow the
instructions will result in death or serious injury.
WARNING
The instructions which follow this term indicate situations where failure to follow the
instructions could result in death or serious injury.
CAUTION
The instructions which follow this term indicate situations where failure to follow the
instructions may result in minor or moderate injury.
Symbols
・・・・・・
This symbol (
) indicates something that you should be careful of. The picture inside the triangle
indicates the nature of the caution that must be taken.
(For example, the symbol at left means “beware of injury”.)
・・・・・・
This symbol (
・・・・・・
This symbol (
) indicates something that you must do. The picture inside the circle indicates the
nature of the thing that must be done.
(For example, the symbol at left means “you must make the ground connection”.)
) indicates something that you must not do.
BAS-341H, BAS-342H
i
[2] Notes on safety
DANGER
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the control box cover. Touching areas where high voltages are present can result in severe injury.
WARNING
Do not allow any liquids to get onto this sewing machine, otherwise fire, electric shocks or operating problems may
occur.
If any liquid gets inside the sewing machine (machine head or control box), immediately turn off the power and
disconnect the power plug from the electrical outlet, and then contact the place of purchase or a qualified
technician.
CAUTION
Environmental requirements
Use the sewing machine in an area which is free from
sources of strong electrical noise such as electrical
line noise or static electric noise.
Sources of strong electrical noise may cause
problems with correct operation.
Any fluctuations in the power supply voltage should
be within ±10% of the rated voltage for the machine.
Voltage fluctuations which are greater than this may
cause problems with correct operation.
The power supply capacity should be greater than the
requirements for the sewing machine's power
consumption.
Insufficient power supply capacity may cause
problems with correct operation.
The pneumatic delivery capability should be greater
than the requirements for the sewing machine's total
air consumption.
Insufficient pneumatic delivery capability may cause
problems with correct operation.
ii
The ambient temperature should be within the range
of 5°C to 35°C during use.
Temperatures which are lower or higher than this
may cause problems with correct operation.
The relative humidity should be within the range of
45% to 85% during use, and no dew formation should
occur in any devices.
Excessively dry or humid environments and dew
formation may cause problems with correct operation.
In the event of an electrical storm, turn off the power
and disconnect the power cord from the wall outlet.
Lightning may cause problems with correct operation.
Do not connect anything to the USB port other than
the USB memory. If this is not observed, problems
with operation may result.
BAS-341H, BAS-342H
CAUTION
Installation
Machine installation should only be carried out by a
qualified technician.
Contact your Brother dealer or a qualified electrician
for any electrical work that may need to be done.
The sewing machine weighs approximately 160 kg.
Use equipment such as a crane or hoist when
installing the machine head and adjusting the height
of the table.
If you try to lift the machine head yourself, it may
cause injuries such as back injury.
All cords should be secured at least 25 mm away
from any moving parts. Furthermore, do not
excessively bend the cords or secure them too firmly
with staples, otherwise there is the danger that fire or
electric shocks could occur.
Install the safety covers to the machine head and
motor.
If using a work table which has casters, the casters
should be secured in such a way so that they cannot
move.
Do not connect the power cord until installation is
complete. If the foot switch is depressed by mistake,
the sewing machine might start operating and injury
could result.
Use a table with a height of 84 cm or less. If the table
is too high, the machine head may become
unbalanced and fall down, and serious injury or
damage to the sewing machine may result.
Hold the machine head with both hands when tilting it
back or returning it to its original position.
In addition, do not subject the machine head to extra
force while it is tilted back. If this is not observed, the
machine head may become unbalanced and fall
down, and serious injury or damage to the sewing
machine may result.
Be sure to wear protective goggles and gloves when
handling the lubricating oil and grease, so that they
do not get into your eyes or onto your skin. If the oil
and grease get into your eyes or onto your skin,
inflammation can result.
Furthermore, do not drink or eat the lubricating oil or
grease. They may cause diarrhea or vomiting.
Keep the oil out of the reach of children.
Be sure to connect the ground. If the ground
connection is not secure, you run a high risk of
receiving a serious electric shock, and problems with
correct operation may also occur.
Sewing
To prevent problems, do not use objects with sharp
points to operate the LCD panel.
This sewing machine should only be used by
operators who have received the necessary training
in safe use beforehand.
The sewing machine should not be used for any
applications other than sewing.
Be sure to wear protective goggles when using the
machine.
If goggles are not worn, there is the danger that if a
needle breaks, parts of the broken needle may enter
your eyes and injury may result.
Turn off the power switch at the following times. If the
foot switch is depressed by mistake, the sewing
machine might start operating and injury could result.
• When replacing the bobbin and needle
• When not using the machine and when leaving the
machine unattended
If using a work table which has casters, the casters
should be secured in such a way so that they cannot
move.
Attach all safety devices before using the sewing
machine. If the machine is used without these
devices attached, injury may result.
Do not touch any of the moving parts or press any
objects against the machine while sewing, as this
may result in personal injury or damage to the
machine.
If an error occurs in machine operation, or if abnormal
noises or smells are noticed, immediately turn off the
power switch. Then contact your nearest Brother
dealer or a qualified technician.
If the machine develops a problem, contact your
nearest Brother dealer or a qualified technician.
Cleaning
Turn off the power switch before carrying out
cleaning. If the foot switch is depressed by mistake,
the sewing machine might start operating and injury
could result.
Be sure to wear protective goggles and gloves when
handling the lubricating oil and grease, so that they
do not get into your eyes or onto your skin. If the oil
and grease get into your eyes or onto your skin,
inflammation can result.
Furthermore, do not drink or eat the lubricating oil or
grease. They may cause diarrhea or vomiting.
Keep the oil out of the reach of children.
BAS-341H, BAS-342H
iii
CAUTION
Maintenance and inspection
Maintenance and inspection of the sewing machine
should only be carried out by a qualified technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the power
cord before carrying out the following operations. If
the foot switch is depressed by mistake, the sewing
machine might start operating and injury could result.
• Inspection, adjustment and maintenance
• Replacing consumable parts such as the rotary
hook
Disconnect the air hoses from the air supply and wait
for the needle on the pressure gauge to drop to “0”
before carrying out inspection, adjustment and repair
of any parts which use the pneumatic equipment.
Hold the machine head with both hands when tilting it
back or returning it to its original position.
In addition, do not subject the machine head to extra
force while it is tilted back. If this is not observed, the
machine head may become unbalanced and fall
down, and serious injury or damage to the sewing
machine may result.
If the power switch needs to be left on when carrying
out some adjustment, be extremely careful to observe
all safety precautions.
When replacing parts and installing optional
accessories, be sure to use only genuine Brother
parts.
Brother will not be held responsible for any accidents
or problems resulting from the use of non-genuine
parts.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly before
using the machine.
To prevent accidents and problems, do not modify
the machine yourself.
Brother will not be held responsible for any accidents
or problems resulting from modifications made to the
machine.
iv
BAS-341H, BAS-342H
[3] Warning labels
The following warning labels appear on the sewing machine.
Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are
difficult to read, please contact your nearest Brother dealer.
1
2
.
*Safety devices
Devices such as eye guard, finger guard,
thread take-up cover, motor cover,
X motor cover, rear cover, solenoid cover,
inner cover, outer cover, fixed cover and
gas spring support cover
8
3
4
Be careful to avoid injury from moving parts.
Be sure to connect the ground.
If the ground connection is not secure, you run a high
risk of receiving a serious electric shock, and problems
with correct operation may also occur.
5
Direction of operation
6
Be careful not to get your hand caught when tilting back
the machine head and returning it to its original position.
7
Do not hold, otherwise problems with
operation or injury may occur.
BAS-341H, BAS-342H
v
Rear cover FL
Rear cover FR
Thread take-up cover
Inside cover R
Middle cover
Outside cover
Eye guard
Finger guard
Fixed cover
Solenoid cover
Motor cover
Inside cover L
Middle cover
Rear cover
Outside cover
Fixed cover
X motor cover
3461B
vi
BAS-341H, BAS-342H
CONTENTS
1. NAMES OF MAJOR PARTS ................ 1
7.STANDARD ADJUSTMENTS ................ 36
2. SPECIFICATIONS ................................ 2
7-1. Adjusting the sensitivity of the thread breakage
sensor ...............................................................36
7-2. Thread take-up spring.......................................37
7-3. Arm thread guide R...........................................37
7-4. Adjusting the needle bar height ........................38
7-5. Adjusting the needle and rotary hook timing.....38
7-6. Adjusting the driver (needle guard) position .....39
7-7. Adjusting the clearance between the
needle and rotary hook tip ................................39
7-8. Adjusting the shuttle race thread guide ............39
7-9. Rotary hook lubrication amount ........................40
7-10. Adjusting the position of the movable knife ....41
7-11. Replacing the movable and fixed knives ........43
7-12. Installing the feed plate ...................................44
7-13. Adjusting the thread wiper ..............................44
7-14. Intermittent presser foot installation position ..45
7-15. Adjusting the intermittent presser foot ............45
7-16. Adjusting the work clamp lift amount ..............47
7-17. Adjusting the air pressure ...............................47
7-18. Adjusting the speed controller.........................48
7-19. If processing the work clamps and the
feed plate to a shape that matches the
sewing pattern ................................................49
3. INSTALLATION .................................... 3
3-1. Table processing diagram ................................ 4
3-2. Installing the control box................................... 5
3-3. Installing the oil pan and support lever base .... 6
3-4. Installing the machine head.............................. 6
3-5. Tilting back and returning the machine head ... 7
3-6. Installing the gas spring .................................. 8
3-7. Installing the LCD panel ................................... 9
3-8. Installing the solenoid valve assembly ............. 10
3-9. Connecting the air tubes................................... 10
3-10. Installing the air hose...................................... 10
3-11. Installing the two-pedal foot switch................. 11
3-12. Installing the cords.......................................... 11
3-13. Connecting the ground wire............................ 15
3-14. Securing the cords and air tubes.................... 16
3-15. Connecting the power cord............................. 17
3-16. Installing the eye guard .................................. 20
3-17. Installing the cotton stand............................... 20
3-18. Lubrication ...................................................... 21
3-19. Checking the machine head switch................ 22
4. PREPARATION BEFORE SEWING..... 23
4-1. Installing the needle.......................................... 23
4-2. 2-pedal foot switch operation method .............. 23
4-3. Threading the upper thread .............................. 24
4-4. Winding the lower thread.................................. 26
4-5. Installing the bobbin case ................................. 27
4-6. Thread tension.................................................. 28
4-6-1. Lower thread tension .............................. 28
4-6-2. Upper thread tension .............................. 29
4-7. Starting up ........................................................ 30
4-8. Setting 2-step operation for the work clamp..... 31
8. LIST OF ERROR CODES..................... 51
9. TROUBLESHOOTING.......................... 57
5. SEWING................................................ 32
5-1. Sewing .............................................................. 32
5-2. Using the STOP switch..................................... 33
6. CLEANING ........................................... 34
6-1. Cleaning the rotary hook .................................. 34
6-2. Draining the oil.................................................. 34
6-3. Cleaning the regulator ...................................... 35
6-4. Checking the control box air inlet ports ............ 35
6-5. Cleaning the eye guard ................................... 35
6-6. Checking the needle ....................................... 35
6-7. Lubrication ........................................................ 35
BAS-341H, BAS-342H
1. NAMES OF MAJOR PARTS
1. NAMES OF MAJOR PARTS
3462B
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
1
STOP switch
Power switch
Work clamp switch
Start switch
Control box
Solenoid valve
LCD panel
Pulley
Cotton stand
Safety devices:
(10) Finger guard
(11) Eye guard
(12) Thread take-up cover
(13) Motor cover
BAS-341H, BAS-342H
2. SPECIFICATIONS
2. SPECIFICATIONS
Sewing machine
Lock stitch pattern tacking sewing machine
Stitch formation
Single needle lock stitch
Max. sewing speed
Max. sewing area (XxY)
Feed mechanism
Stitch length
Maximum No. of stitches
No. of sewing data items
that can be stored
Work clamp lift method
2,800 sti/min
BAS-341H: 250 x 160 mm
BAS-342H: 300 x 200 mm
Intermittent feed, pulse motor drive
0.05 − 12.7 mm
20,000 stitches (per program)
999 (Internal memory, SD card, USB memory) (*1)
Pneumatic cylinder method
Work clamp height
Max. 30 mm
2-step work clamp
Integrated-type work clamp
Intermittent presser foot lift
amount
Intermittent presser foot
stroke
Hook
22 mm
2 − 4.5 mm, 4.5 − 10 mm or 0 (Default setting 3 mm)
Double-capacity shuttle hook
Wiper device
Standard equipment
Thread trimmer
Standard equipment
Digital tension
Standard equipment
Thread breakage detector
Standard equipment
Cycle programs
Motor
30
550 W
AC servo motor
Weights
Machine head Approx. 160 kg, LCD panel Approx. 0.8 kg
Control box 12 kg (Differs depending on destination)
Power source
Single-phase 220V / 230V, 3-phase 220V / 380V / 400V
(For three-phase 380 V/400 V, the trans box is required.)
Air pressure
0.5 MPa 1.8 l/min.
(*1) The number of data items and stitches that can be stored will vary depending on the number of stitches in each
program.
No guarantees of operation can be given for any media.
BAS-341H, BAS-342H
2
3. INSTALLATION
3. INSTALLATION
CAUTION
Machine installation should only be carried out by a
qualified technician.
Contact your Brother dealer or a qualified electrician
for any electrical work that may need to be done.
The sewing machine head weighs approximately 160
kg.
Use equipment such as a crane or hoist when
installing the machine head and adjusting the height of
the table.
If you try to lift the machine head yourself, it may cause
injuries such as back injury.
Hold the machine head with both hands when tilting it
back or returning it to its original position.
In addition, do not subject the machine head to extra
force while it is tilted back. If this is not observed, the
machine head may become unbalanced and fall down,
and serious injury or damage to the sewing machine
may result.
All cords should be secured at least 25 mm away from
any moving parts. Furthermore, do not excessively
bend the cords or secure them too firmly staples,
otherwise there is the danger that fire or electric
shocks could occur.
Do not connect the power cord until installation is
complete.
If the foot switch is depressed by mistake, the sewing
machine might start operating and injury could result.
Be sure to connect the ground. If the ground
connection is not secure, you run a high risk of
receiving a serious electric shock, and problems with
correct operation may also occur.
If using a work table which has casters, the casters
should be secured in such a way so that they cannot
move.
Install the safety covers to the machine head and
motor.
Use a table with a height of 84 cm or less. If the table
is too high, the machine head may become
unbalanced and fall down, and serious injury or
damage to the sewing machine may result.
3
BAS-341H, BAS-342H
3. INSTALLATION
3-1. Table processing diagram
・ The thickness of the table should be at least 50 mm, and it should be strong enough to bear the weight and vibration of the
sewing machine.
・ If using casters, use ones which can bear the total weight of sewing machine and table.
・ Check that the control box is at least 10 mm away from the leg. If the control box and the leg are too close together, it may result
in incorrect sewing machine operation.
3635B
BAS-341H, BAS-342H
4
3. INSTALLATION
3-2. Installing the control box
CAUTION
The control box is heavy, so installation should be carried out by two or more people.
In addition, take steps to make sure that the control box does not fall down.
If this is not done, injury to feet or damage to the control box may result.
3606B
(1) Control box
(2) Bolts [4 pcs.]
(3) Plain washers [4 pcs.]
(4) Spring washers [4 pcs.]
(5) Nuts [8 pcs.]
NOTE:
Check that the control box (1) is at
least 10 mm away from the leg. If the
control box (1) and the leg are too
close together, it may result in
incorrect sewing machine operation.
10mm or more
Leg
3599B
(6) Power switch
(7) Wood screws [2 pcs.]
(8) Staples [7 pcs.]
NOTE:
Take care when tapping in the staples
(8) to make sure that they do not
Operator
pierce the power cord.
3608B
5
BAS-341H, BAS-342H
3. INSTALLATION
3-3. Installing the oil pan and support lever base
(1) Oil pan
(2) Wood screws [4 pcs.]
(3) Oiler
(4) Support lever base
(5) Plain washers [2 pcs.]
(6) Spring washers [2 pcs.]
(7) Bolts [2 pcs.]
Table
3964M
3-4. Installing the machine head
1. Place the machine head onto the
table.
NOTE:
・ Use a crane or hoist to install the
sewing machine.
・ Be careful of the following when
lowering the machine head onto the
table.
! Do not let any cords get clamped
between the machine head and
the table.
! Do not place the machine head
cushion (c) on top of the oil pan
(a) or the support lever base (b).
! Do not let the side (d) of the
machine head switch lever touch
the support lever base (b).
(1) Rubber bushes (2 pcs.)
(2) Hinge holders (2 pcs.)
(3) Plain washers [4 pcs.]
(4) Spring washers [4 pcs.]
(5) Bolts [4 pcs.]
2585B
(Continued on next page)
BAS-341H, BAS-342H
6
3. INSTALLATION
2. After placing the machine head onto the table, remove the
bolt (6) and the spacer (7).
* The bolt (6) and the spacer (7) are necessary for
securing the support lever (8) when the machine head is
removed from the table, so keep them in a safe place.
3. Pass the support lever shaft (9) through the hole in the
support lever base (10) and through the groove (f) in the
support lever (8), and push it in until it is flush with the
surface of the support lever base (10).
* Be sure to insert so that the groove (g) in the support
lever shaft (9) faces in the direction shown in the
illustration.
* If it is difficult to pass the support lever shaft (9) through
the groove (f) in the support lever (8), move the end of
the support lever (8) up and down while passing the
support lever shaft (9) through.
Flush
3601B
3-5. Tilting back and returning the machine head
CAUTION
Hold the machine head with both hands when tilting it back or returning it to its original position.
In addition, do not subject the machine head to extra force while it is tilted back. If this is not observed, the machine head
may become unbalanced and fall down, and serious injury or damage to the sewing machine may result.
Always be sure to engage the stopper of the support lever (1) when tilting back the machine head.
If the stopper is not engaged, the machine head may return to its original position and your hands may get caught and
injury may result.
When disengaging the stopper, hold it by the knob (a).
If you hold at the place indicated by (b), your hand will get caught between the support lever (1) and the table when the
machine head is returned to its original position and injury will result.
Disengaging
the stopper
The machine head can be tilted
back and returned to one of three
heights.
Engaging
the stopper
3967M
7
BAS-341H, BAS-342H
3. INSTALLATION
3-6. Installing the gas spring
Crane or hoist
Disengaging
the stopper
Engaging
the stopper
3466B
1. Tilt back the machine head, and then secure the support lever (1) at stopper position (a).
(Refer to "3-5. Tilting back and returning the machine head".)
NOTE: Use equipment such as a crane or hoist to tilt back the machine head.
2. Tighten the two set screws (2) to secure the support lever shaft (3).
3. Install the gas spring (8).
(4) Gas spring holders [L and R]
(5) Spacer
(6) Bolt
Be sure to install so that
the side with “UP” on it is
facing upward.
(7) Nut
(8) Gas spring
(9) Shaft collars [2 pcs.]
(10) Gas spring shaft D
(11) Plain washers [2 pcs.]
(12) Retaining rings E [2 pcs.]
(13) Bolts [4 pcs.]
(14) Plain washers [4 pcs.]
(15) Spring washers [4 pcs.]
(16) Nuts [4 pcs.]
(17) Gas spring shaft U
(18) Set screw
* After installing the gas spring (8), gently
return the machine head to its original
position.
(Refer to "3-5. Tilting back and returning
Note that the L and R
shapes are different.
the machine head".)
2915B
BAS-341H, BAS-342H
8
3. INSTALLATION
3-7. Installing the LCD panel
(1) Cradle
(2) Rubber cushion
(3) Wood screws [4 pcs.]
(4) Setting plate
(5) Flat screws [4 pcs.]
(6) LCD panel
(7) Staples [2 pcs.]
・
Pass the cord of the LCD panel (8)
through the table hole, and then
insert it into the (PANEL) connector
(9) on the side of the control box.
・ Tighten the four wood screws (3) so
that the thickness of the rubber
cushion (2) is 5 mm.
3574B
9
BAS-341H, BAS-342H
3. INSTALLATION
3-8. Installing the solenoid valve assembly
Install underneath the work table. (Refer
to "3-1. Table processing diagram" for the
installation positions.)
(1) Solenoid valve assembly
(2) Washers [2 pcs.]
(3) Wood screws [2 pcs.]
NOTE:
Make sure that the solenoid valve
assembly does not touch the control
box or the leg of the table.
2562B
3-9. Connecting the air tubes
Connect as shown in
the illustration while
checking the marks.
Plugs 4
Branch unions Y
2563B
3-10. Installing the air hose
1. Close the cock (1).
Close
2. Turn the nut (3) at the end of the air hose (2) and connect it
Open
3. Open the cock at the compressor.
to the valve (4).
* Check that no air is leaking from the connection of the
valve (4) and air hose (2).
4. Open the cock (1).
(The meter pointer will turn clockwise.)
NOTE:
Turn the cock (1) gently to open it.
5. Adjust the air pressure. (Refer to "7-18. Adjusting the speed
controller".)
2564B
BAS-341H, BAS-342H
10
3. INSTALLATION
3-11. Installing the two-pedal foot switch
(1) Two-pedal foot switch
(2) Conversion harness
Connect the connector for the two-pedal foot switch (1) to the
conversion harness (2). Insert the conversion harness (2) into
the P15 (PEDAL) connector on the main P.C. board. (Refer to
"3-12. Connecting the cords".)
* Be sure to make the ground connection. (Refer to “3-13.
Connecting the ground wire”.)
<Two-pedal foot switch operating method>
When the work clamp switch (left) is depressed, the work clamp
is lowered, and when the start switch (right) is depressed, the
sewing machine starts sewing.
Work clamp switch (2-step)
Start switch
3530B
4923Q
3-12. Connecting the cords
1. Remove the cover of the control box.
2. Loosen the two screws (1), and then
open the cord presser plate (2) in the
direction of the arrow.
3. Pass the bundle of cords from the
machine head through the hole in the
table, and then pass it through the
hole in the control box together with
the solenoid valve.
4. Securely connect the connectors as
indicated in the table.
(Refer to next page)
NOTE:
・ Check that the connector is facing
the correct way, and then insert it
firmly until it locks into place.
・ Secure the cables with cable ties
and cord clamps, while being careful
not to pull on the connector.
3568B
11
BAS-341H, BAS-342H
3. INSTALLATION
< Main P. C. board >
Lock the cord
clamp securely.
<Removal>
Press the tab.
<Securing>
3672B
Connectors
X pulse motor encoder [5-pin] White
Y pulse motor encoder [5-pin] Blue
Intermittent presser foot pulse motor encoder [5-pin] Black
Machine head switch [3-pin]
Conversion harness [7-pin] White
Machine head memory [6-pin]
Thread trimmer solenoid [6-pin]
Digital tension solenoid / Tension release solenoid [4-pin]
X pulse motor [4-pin] White
Y pulse motor [4-pin] Blue
Work clamp pulse motor [4-pin] Black
Home position sensor [12-pin] White
STOP switch [6-pin] White
Valve harness [12-pin]
Upper thread breakage detector [2-pin] White
Fan [6-pin]
Connection location on
main P. C. board
P17 (X-ENC)
P18 (Y-ENC)
P19 (P-ENC)
P14 (HEAD-SW)
P15 (PEDAL)
P16 (HEAD-M)
P2 (SOL1)
P3 (SOL2)
P21 (XPM)
P22 (YPM)
P23 (PPM)
P8 (SENSOR1)
P9 (HEAD)
P35 (EX-OUT1)
P36, P9(HEAD)
P7 (SENSOR2)
Cord clamps /
cable ties
(2)
(2)
(2)
(2)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(2) (3)
(2) (3)
(2) (3)
(2) (3)
(2) (3)
NOTE: Route the X, Y and work clamp pulse motor harnesses so that they do not touch the power supply P.C. board at
the bottom of the control box.
BAS-341H, BAS-342H
12
3. INSTALLATION
< Motor P. C. board >
Lock the cord clamps
securely.
3576B
Connection location on
motor P. C. board
(UVW)
P11 (SYNC)
Connectors
Upper shaft motor [4-pin]
Synchronizer [10-pin]
Cord clamps
(4)
(2) (3)
5. Close the cord presser plate (6) in the direction of the white
arrow, and secure it by tightening the two screws (5).
NOTE:
Close the cord presser plate (6) securely so that no
foreign objects, insects or small animals can get inside
the control box.
6. Check that the cords do not get pulled, and then gently return
the machine head to its original position.
3538B
13
BAS-341H, BAS-342H
3. INSTALLATION
<LCD panel>
(PANEL)
Connector
LCD panel [9-pin]
D-sub connector
(PANEL)
3578B
BAS-341H, BAS-342H
14
3. INSTALLATION
3-13. Connecting the ground wire
CAUTION
Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric
shock, and problems with correct operation may also occur.
3579B
(1) Ground wire from the machine head
(2) Ground wires from two-pedal foot switch harnesses (2 wires)
• Tighten the control box cover with the eight screws. Check that the cords are not clamped by the cover at this time.
NOTE: Make sure that the ground connections are secure in order to ensure safety.
15
BAS-341H, BAS-342H
3. INSTALLATION
3-14. Securing the cords and air tubes
Secure the air tubes (a) and the solenoid
valve assembly cord (b) together
underneath the table with the three cord
holders (1).
< Perspective view from above table >
Control box
Leg
Table
(1) Cord holders [3 pcs.]
(2) Wood screws [3 pcs.]
Solenoid valve
assembly
3654B
<Checking the cords>
1. Gently tilt back the machine head.
(Refer to "3-5. Tilting back and
returning the machine head".)
2. Check that none of the cords are
being pulled.
3. Return the machine head to its
original position.
4. Close the cord presser plate (3) in the
direction of the arrow, and secure it by
tightening the two screws (4).
NOTE:
Close the cord presser plate (3)
securely so that no foreign objects,
insects or small animals can get
inside the control box.
5. Secure the cover of the control box by
tightening the eight screws (5).
Check that the cords are not clamped
by the cover at this time.
3600B
BAS-341H, BAS-342H
16
3. INSTALLATION
3-15. Connecting the power cord
CAUTION
Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric
shock, and problems with correct operation may also occur.
Connect cords that match the voltage
specifications.
< EU specifications>
(1) Filter box
(2) Screws [4 pcs.]
(3) Staples [4 pcs.]
(4) Power cord
1. Attach an appropriate switch and cable
to the power cord (4). (The green and
yellow wire is the ground wire.)
2. Insert the power plug into a
properly-grounded electrical outlet.
NOTE:
• Take care when tapping in the staples
(3) to make sure that they do not pierce
the cords.
• Do not use extension cords, otherwise
machine operation problems may
result.
Leg
Control
box
Green and yellow wire (ground wire)
17
BAS-341H, BAS-342H
3673B
3. INSTALLATION
Connect cords that match the voltage
specifications.
<200 V system >
Operator
(1) Power switch
(2) Wood screws [2 pcs.]
3146B
3583B
(3) 3-pin power supply connector
(4) Power cord
(5) Staples [5 pcs.]
1. Attach an appropriate plug to the
power cord (4). (The green and yellow
wire is the ground wire.)
2. Insert the power plug into a
properly-grounded electrical outlet.
NOTE:
• Take care when tapping in the staples
(5) to make sure that they do not pierce
the cords.
• Do not use extension cords, otherwise
machine operation problems may
result.
3. Use the eight screws to tighten the
cover of the control box. Check that
none of the cords are being clamped
by the cover at this time.
Green and yellow wire
(ground wire)
BAS-341H, BAS-342H
18
3. INSTALLATION
<400 V system >
(1) Power switch
(2) Wood screws [2 pcs.]
Operator
3146B
3584B
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Transformer box
Transformer box plates [2 pcs.]
Screws [with washer] [4 pcs.]
3-pin power supply connector
Staples [6 pcs.]
Cord clamps [2 pcs.]
Power cord
1. Attach an appropriate plug to the
power cord (9). (The green and yellow
wire is the ground wire.)
2. Insert the power plug into a
properly-grounded electrical outlet.
* The inside of the control box uses
single-phase power.
NOTE:
・ If the ground connection is not secure,
electric shocks, operating errors or
damage to electronic components
such as P.C. boards may occur.
・ Take care when tapping in the staples
(7) to make sure that they do not
pierce the cords.
・ Do not use extension cords, otherwise
machine operation problems may
result.
3. Use the eight screws to tighten the
cover of the control box. Check that
none of the cords are being clamped
by the cover at this time.
Green and yellow wire
(ground wire)
3675B
19
BAS-341H, BAS-342H
3. INSTALLATION
3-16. Installing the eye guard
CAUTION
Attach all safety devices before using the sewing machine.
If the machine is used without these devices attached, injury may result.
(1)
(2)
(3)
(4)
(5)
Bolt (loosen)
Eye guard (tilt forward)
Eye guard assembly
Plain washers [2 pcs.]
Bolts [2 pcs.]
After installing the eye guard assembly
(3), return the eye guard (2) to its original
angle, and then tighten the bolt (1) to
secure it in place.
3048B
3-17. Installing the cotton stand
(1) Cotton stand
NOTE:
Securely tighten the nut (3) so that
two washers (2) are securely
clamped so that the cotton stand (1)
does not move.
3533B
BAS-341H, BAS-342H
20
3. INSTALLATION
3-18. Lubrication
CAUTION
Do not connect the power cord until lubrication is complete.
If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.
Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into
your eyes or onto your skin. If the oil and grease get into your eyes or onto your skin, inflammation can result.
Furthermore, do not drink or eat the lubricating oil or grease. They may cause diarrhea or vomiting.
Keep the oil out of the reach of children.
・ The sewing machine should always be lubricated and the oil
supply replenished before it is used for the first time, and
also after long periods of non-use.
・ Use only the lubricating oil <JX Nippon Oil & Energy
Corporation Sewing Lube N10; VG10> specified by Brother.
*
If this type of lubricating oil is difficult to obtain, the
recommended oil to use is <Exxon Mobil Essotex SM10;
VG10>.
1. Fill the arm oil tank and the bed oil tank with oil.
NOTE:
Be sure to add more oil when the oil level drops down
to about one-third full in the oil gauge window (1). If the
oil drops below the one-third full level in the oil gauge
window (1), there is the danger that the sewing
machine may seize during operation.
2. Pour oil in through the two holes of the shuttle race base
assembly so that the felt (2) is lightly moistened. If it is
difficult to add oil, you can also remove the rubber cap (3)
and pour in the oil through the hole.
NOTE:
• The two pieces of felt (2) should normally project by 0
to 0.5 mm from the hook race. Be careful not to push
in the felt (2) when lubricating.
• If there is no more oil on the felt (2) of the shuttle race
base assembly, problems with sewing may result.
3. If using the needle cooler (4), fill it with silicon oil (100
mm2/s).
(Refer to "4-3. Threading the upper thread" for details on
using the needle cooler (4).)
3569B
3531B
3532B
21
BAS-341H, BAS-342H
3. INSTALLATION
3-19. Checking the machine head switch
1. If the machine head is tilted back, gently return it to its
original position. (Refer to "3-5. Tilting back and returning
the machine head".)
2. Turn on the power switch.
3. Check that no error numbers appear on the LCD panel.
<If error [E050], [E051] or [E055] is displayed >
If the machine head switch (1) is not turned on, error [E050],
[E051] or [E055] will occur.
Adjust the installation position of the machine head switch (1).
1. Turn off the power.
2. Loosen the two screws (2).
3. Push down the right side of the machine head switch (1) so
that the machine head switch (1) turns on, and then tighten
the two screws (2).
4. Turn on the power and check that no error numbers are
displayed.
3989M
BAS-341H, BAS-342H
22
4. PREPARATION BEFORE SEWING
4. PREPARATION BEFORE SEWING
4-1. Installing the needle
CAUTION
Turn off the power switch before installing the needle.
If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.
1. Loosen the set screw (1).
2. Insert the needle (2) in a straight line as far as it will go,
making sure that the long groove on the needle is at the
front, and then securely tighten the set screw (1).
3475B
4-2. 2-pedal foot switch operation method
3991M
When the work clamp switch (left side) is depressed, the
intermittent presser foot (1) and the work clamp (2) are
lowered, and when the start switch (right side) is then
depressed, the sewing machine starts operating.
Work clamp switch
Start switch
.
3502B
23
BAS-341H, BAS-342H
4. PREPARATION BEFORE SEWING
4-3. Threading the upper thread
Thread the upper thread correctly as shown in the illustration below.
* When using threading mode for threading, the thread can be threaded more easily.
(Refer to "Threading mode" on the next page.)
[If using cotton thread or spun thread]
3476B
[If using synthetic thread]
Thread the upper thread
Needle cooler
3477B
3586B
• Turn the machine pulley (2) and raise the thread take-up (3) to its highest position before threading the upper thread.
(This will make threading easier and it will prevent the thread from coming out at the sewing start.)
• When threading the thread through the needle, allow a distance of approximately 42 mm between the needle hole and the
end of the thread.
If it is too long, the thread may become tangled, and if it is too short, the thread may pull out at the sewing start.
• If you would like to adjust the sensitivity of the thread breakage sensor, refer to "7-1. Adjusting the sensitivity of the thread
breakage sensor”.
BAS-341H, BAS-342H
24
4. PREPARATION BEFORE SEWING
<Threading mode>
Threading mode is safe because the sewing machine will not start even when the start switch is depressed.
1
Turn on the power.
3055B
2
Touch the Thread key on the screen.
• Work clamp will drop.
• The tension discs will open.
3
4
Threading the thread.
Ending threading mode
Touch the OK key on the screen.
The display will return to the previous screen.
• The work clamp will return to where it was before
threading mode was started.
25
BAS-341H, BAS-342H
4. PREPARATION BEFORE SEWING
4-4. Winding the lower thread
CAUTION
Do not touch any of the moving parts or press any objects against the machine while winding the lower thread, as
this may result in personal injury or damage to the machine.
1. Place the bobbin onto the bobbin winder shaft (1).
2. Thread the thread as shown in the illustration, wind the
thread around the bobbin several times, and then press
the bobbin presser arm (2).
3. Turn on the power.
4. Lower the work clamp before depressing the start switch.
Home position detection will be carried out.
5. Touch the Wind key (4) on the screen.
6. The display will switch to the thread winding mode
screen.
7. Check that the needle does not touch the work clamp,
and then lower the work clamp before depressing the
start switch.
8. Keep depressing the start switch until the lower thread
stops being wound onto the bobbin.
9. Once winding of the set amount of lower thread (80 - 90%
of the bobbin capacity) is completed, the bobbin presser
arm (2) will return automatically.
10. Remove the bobbin, hook the thread onto the knife (3),
and then pull the bobbin in the direction of the arrow to
cut the thread.
11. Touch the OK key to return to the previous screen.
3587B
3550B
(4)
BAS-341H, BAS-342H
26
4. PREPARATION BEFORE SEWING
3566B
Adjusting the bobbin winding amount
Loosen the screw (5) and move the bobbin presser (6).
More thread
Less thread
If the thread winds onto the bobbin unevenly
Loosen the set screw (7) and move the bobbin winder
tension assembly (8) up and down to adjust.
Case A
3567B
* For case A, move the bobbin winder tension assembly (8)
down, and for case B, move it upward.
Case B
4-5. Installing the bobbin case
CAUTION
Turn off the power switch before installing the bobbin case.
If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.
2534Q
30mm
2535Q
4002M
1.
2.
3.
4.
5.
6.
27
Pull the shuttle race cover (1) downward to open it.
While holding the bobbin so that the thread winds to the right, insert the bobbin into the bobbin case.
Pass the thread through the slot (2) and pull it out from the thread hole (3).
Check that the bobbin turns in the direction of the arrow when the thread is pulled.
Pass the thread through the lever thread hole (4), and then pull out approximately 30 mm of thread.
Hold the latch on the bobbin case and insert the bobbin case into the rotary hook.
BAS-341H, BAS-342H
4. PREPARATION BEFORE SEWING
4-6. Thread tension
[Thread tension reference]
Upper thread
#20 or similar
Lower thread
#20 or similar
Upper thread tension (N)
[Tension value]
1.4 − 1.8
[140 - 180]*1
Lower thread tension (N)
0.3 − 0.4
Pre-tension (N)
0.2 − 0.4
Needle
DP x 17 #19
Normal sewing speed
2,000 sti/min
*1 This is the tension value when the pretension is 0.2 N.
4-6-1. Lower thread tension
Adjust the thread tension to the weakest possible tension by
turning the thread tension nut (1) until the bobbin case will not
drop by its own weight while the thread end coming out of the
bobbin case is held.
Stronger
Weaker
2536Q
BAS-341H, BAS-342H
28
4. PREPARATION BEFORE SEWING
4-6-2. Upper thread tension
Use the digital tension to adjust the
tension as appropriate for the material
being sewn. (Refer to “Setting the
tension value” below.)
Turn the tension nut (1) (sub-tension) to
adjust so that the upper thread trailing
length is about 42 mm.
Weaker
Stronger
3598B
[Sewing operation screen]
Setting the tension value
Touch the △ and ▽ keys (2) on the
sewing operation screen to increase or
decrease the Tension value.
(2)
29
BAS-341H, BAS-342H
4. PREPARATION BEFORE SEWING
4-7. Starting up
3482B
Before turning on the power, check that the needle bar is
at the needle up stop position.
Turn the pulley (1) in the direction of the arrow until the ridge
at the bottom of the thread take-up (2) is aligned with the
index mark.
Aligned
3483B
Turn on the power.
If a program has been registered, the program number and a
preview of the sewing pattern will be displayed.
No programs are registered at the time of shipment from the
factory, and so "---" is displayed as the program number
(No.).
For details on the sewing data reading method, refer to "3.
USING STORAGE MEDIA" in the "LCD Panel/Operation
Panel" Instruction Manual".
BAS-341H, BAS-342H
30
4. PREPARATION BEFORE SEWING
4-8. Setting 2-step operation for the work clamp
4009M
When these settings are made, the work clamp (1) can be
lowered in two steps.
1st step
2nd step
Intermediate
position
1. Set memory switch No. 002 to "1".
(Refer to "2-2. List of memory switch settings" in the "LCD
Panel/Operation Panel" Instruction Manual.)
2. With the work clamp (1) raised, loosen the wing screw (2).
3. Move the work clamp stopper (3) up or down to determine
the intermediate position, and then tighten the wing screw
(2) to secure the work clamp stopper (3) in place.
4. Depress the work clamp switch (4) to the 1st step and
check the intermediate position for the work clamp.
5. Depress the work clamp switch (4) to the 2nd step to fully
lower the work clamp.
1st step
2nd step
* 2-step work clamp operation is enabled when memory
switch No. 002 is set to "1".
* Do not set memory switch No. 002 to "2".
4010M
<To return the work clamp to one-step operation>
1. Set memory switch No. 002 to "0".
(Refer to "2-2. List of memory switch settings" in the "LCD
Panel/Operation Panel" Instruction Manual.)
2. With the work clamp (1) raised, loosen the wing screw (2).
3. Move the work clamp stopper (3) to its highest position,
and then tighten the wing screw (2) to secure the work
clamp stopper (3) in place.
4011M
31
BAS-341H, BAS-342H
5. SEWING
5. SEWING
WARNING
Do not allow any liquids to get onto this sewing machine, otherwise fire, electric shocks or operating problems may
occur.
If any liquid gets inside the sewing machine (machine head or control box), immediately turn off the power and
disconnect the power plug from the electrical outlet, and then contact the place of purchase or a qualified
technician.
CAUTION
Turn off the power switch at the following times.
If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.
• When replacing the bobbin and needle
• When not using the machine and when leaving the machine unattended
Do not touch any of the moving parts or press any objects against the machine while sewing, as this may result in
personal injury or damage to the machine.
5-1. Sewing
3551B
1. Turn on the power.
2. Touch the △ or ▽ key to select the number for the
program to be sewn.
* For details on reading sewing data from SD cards and
USB memory devices, refer to "3-4. Importing items of
sewing data separately" in the "LCD panel/Operation
pane" Instruction Manual.
3. Lower the work clamp (2) and then depress the start
switch (1).
Home position detection will be carried out.
4. Place the materials under the work clamp (2).
5. Depress the work clamp switch (3).
The work clamp (2) will be lowered.
6. Depress the start switch (1).
The sewing machine will start sewing.
7. After sewing is completed, the thread trimmer will
operate. And then the work clamp (2) will be raised.
Use a work clamp which will hold the material securely
so that it does not slip. If the material slips when using
the standard work clamp and feed plate, process them
so that the material does not slip.
3486B
BAS-341H, BAS-342H
32
5. SEWING
5-2. Using the STOP switch
If you press the emergency stop switch (1) to during actual sewing, an error dialog box will be displayed and the sewing
machine will immediately stop.
3487B
<Clearing>
1. Touch the Reset key (2).
・ The thread will be trimmed, and then the error dialog
box on the screen will disappear and the buzzer will
stop.
2. A dialog box asking you to confirm if you want to
continue sewing will be displayed.
(3)
(4)
(2)
<Continuing sewing from a stopping point>
If the thread breaks or the lower thread runs out during sewing, you can then continue sewing from the point where the
thread broke or ran out.
1
Touch "Yes" (3) to return to the resewing standby screen.
2
Touch the
keys (5) and (6) on the screen to return
to the position where sewing is to be resumed.
When you touch the
(5)
key (5), the feed will move backward
by 1 stitch, and when you touch the
move forward by 1 stitch.
(6)
3
Depress the start switch.
The sewing machine will start operating and sewing will start.
start switch
3655B
<Returning to the sewing start position without continuing sewing>
If you do not wish to continue sewing, touch "No" (4).
・After home position detection is carried out, the mechanism will return to the sewing start position.
33
key (6), the feed will
BAS-341H, BAS-342H
6. CLEANING
6. CLEANING
CAUTION
Turn off the power switch before carrying out cleaning.
If the foot switch is depressed by mistake, the sewing machine might start operating and injury could
result.
Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they
do not get into your eyes or onto your skin. If the oil and grease get into your eyes or onto your skin,
inflammation can result.
Furthermore, do not drink or eat the lubricating oil or grease. They may cause diarrhea or vomiting.
Keep the oil out of the reach of children.
6-1. Cleaning the rotary hook
1. Pull the shuttle race cover downward to open it, and then
remove the bobbin case.
2. Open the setting claw (1) in the direction indicated by the
arrow, and then remove the shuttle race base (2) and the
shuttle hook (3).
3. Clean all the dust and lint from around the driver (4), the
top of the rotary hook thread guide and the shuttle race.
4024M
6-2. Draining the oil
1. Remove and empty the oiler (1) whenever it is full.
2. After emptying oiler (1), screw it back into its original
position.
4025M
BAS-341H, BAS-342H
34
6. CLEANING
6-3. Checking the regulator
1. If water collects in the bottle of the regulator (1), turn the
drain cock (2) in the direction of the arrow to drain the
water.
2. After draining the water, tighten the drain cock (2).
2578B
6-4. Cleaning the control box air inlet ports
Use a vacuum cleaner to clean the filter in the air inlet ports
(2) of the control box (1) at least once a month.
3607B
6-5. Cleaning the eye guard
Wipe the eye guard clean with a soft cloth.
NOTE:
Do not use solvents such as kerosene or thinner to
clean the eye guard.
3493B
6-6. Checking the needle
Always check that the tip of the needle is not broken and
also that the needle is not bent before starting sewing.
3494B
6-7. Lubrication
Lubricate the sewing machine while referring to "3-18. Lubrication".
35
BAS-341H, BAS-342H
7. STANDARD ADJUSTMENTS
7. STANDARD ADJUSTMENTS
CAUTION
Maintenance and inspection of the sewing machine
should only be carried out by a qualified technician.
Hold the machine head with both hands when tilting it
back or returning it to its original position.
In addition, do not subject the machine head to extra
force while it is tilted back. If this is not observed, the
machine head may become unbalanced and fall
down, and serious injury or damage to the sewing
machine may result.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the power
cord before carrying out the following operations.
If the foot switch is depressed by mistake, the sewing
achine might start operating and injury could result.
・ Inspection, adjustment and maintenance
・ Replacing consumable parts such as the rotary
hook
Be sure to wear protective goggles and gloves when
handling the lubricating oil and grease, so that they
do not get into your eyes or onto your skin. If the oil
and grease get into your eyes or onto your skin,
inflammation can result.
Furthermore, do not drink or eat the lubricating oil or
grease. They may cause diarrhea or vomiting.
Keep the oil out of the reach of children.
Disconnect the air hoses from the air supply and wait
for the needle on the pressure gauge to drop to "0"
before carrying out inspection, adjustment and repair
of any parts which use the pneumatic equipment.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
If the power switch and air need to be left on when
carrying out some adjustment, be extremely careful
to observe all safety precautions.
7-1. Adjusting the sensitivity of the thread breakage sensor
1.
Open the cover (1) and remove the upper thread from
2.
Turn the control (3) to the right <a> until the LED (4)
3.
Turn the control (3) to the left <b> until the LED (4)
the photo sensor (2).
illuminates.
switches off,
4. Place the upper thread into the photo sensor (2), and
close the cover (1).
NOTE:
・Thread breakages may be difficult to detect depending
on the thickness of the thread and the type of material
being
sewn. In such cases, turn the control (3) to
adjust the sensitivity, or change the number of stitches
for judgment of an upper thread breakage.
* Contact the place of purchase for information on
changing the number of stitches for judgment of an
upper thread breakage.
・If foreign objects get into the photo sensor (2), it will not
be possible to detect thread breakages. Clean inside
the photo sensor (2) to keep it free from dust and other
foreign particles.
3577B
・If applying silicone to the thread, apply the silicone
between the thread breakage detector and the thread
take-up. If silicone is applied to the thread before it
passes through the photo sensor (2), the sensor
window inside the photo sensor (2) will become dirty
and it will not be possible to detect thread breakages.
BAS-341H, BAS-342H
36
7. STANDARD ADJUSTMENTS
7-2. Thread take-up spring
Lower
Thread take-up spring height
(mm)
Thread take-up spring tension
(N)
Higher
7 - 10
0.6 - 1.2
<Thread take-up spring height>
Loosen the set screw (1) and turn the adjuster to adjust.
3495B
3496B
<Thread take-up spring tension>
1. Press the upper thread slightly above the tension bracket
(2) with a finger to stop the thread spooling out.
2. Pull the upper thread downward so that the thread
take-up spring (3) is extended to the same height as the
base of the thread guide arm (4), and then measure the
tension of the thread take-up spring (3).
3. Use a screwdriver to turn the tension stud (5) in order to
Stronger
adjust the tension of the thread take-up spring (3).
Weaker
NOTE:
If the thread tension spring (3) is not adjusted correctly, the upper thread trailing length will be uneven after thread
trimming.
7-3. Arm thread guide R
The standard position of arm thread guide R (1) is when the
screw (2) is aligned with the index mark.
More thread
Less thread
Loosen the screw (2) and move the arm thread guide R (1) to
adjust.
・ When sewing heavy-weight material, move the arm
thread guide R (1) to the left. (The thread take-up amount
Index mark
will become greater.)
・ When sewing light-weight material, move the arm thread
guide R (1) to the right. (The thread take-up amount will
become smaller.
3497B
37
BAS-341H, BAS-342H
7. STANDARD ADJUSTMENTS
7-4. Adjusting the needle bar height
2552Q
3498B
Turn the pulley in the direction of the arrow to move the needle bar to the lowest position. Then remove the rubber plug (2),
loosen the screw (3) and then move the needle bar up or down to adjust so that the second reference line from the bottom of
the needle bar (reference line A) is aligned with the lower edge of the needle bar bush (1).
* If using a DP X 5 needle, align with the highest reference line (reference line a).
7-5. Adjusting the needle and rotary hook timing
3359B
3522B
Center of the needle
Tip
3514B
0135Q
1. Turn the pulley (1) in the direction of the arrow to raise the needle bar from the lowest position until the lowest reference
line on the needle bar (reference line B) is aligned with the lower edge of the needle bar bush (2).
* If using a DP X 5 needle, align with the reference line b which is the second reference line from the top.
2. Loosen the bolt (3).
3. Move the driver (4) sideways so that the tip of the rotary hook is aligned with the middle of the needle, and then tighten the
bolt (3).
BAS-341H, BAS-342H
38
7. STANDARD ADJUSTMENTS
7-6. Adjusting the driver (needle guard) position
Center of the needle
Tip
3514B
0135Q
3515B
3516B
Turn the pulley (1) in the direction of the arrow to align the tip of the rotary hook with the center of the needle, and then loosen
the set screw (3) and turn the adjusting stud (4) to adjust so that the driver (2) is touching the needle.
NOTE:
If the driver (2) crosses the needle more than necessary, it will cause problems with the thread tension.
Furthermore, if it does not cross the needle at all, the tip of the rotary hook will interfere with the needle and skipped
stitches may occur.
7-7. Adjusting the clearance between the needle and rotary hook tip
0.01 - 0.08mm
0138Q
4035M
Turn the pulley in the direction of the arrow to align the tip of the rotary hook with the center of the needle, and then loosen
the set screw (1) and turn the adjusting stud (2) to adjust so that the clearance between the needle and the tip of the rotary
hook is 0.01 to 0.08 mm.
7-8. Adjusting the shuttle race thread guide
3574Q
Install the shuttle race thread guide (1) by pushing it in the direction of the arrow so that the needle groove is aligned with the
center of the needle plate hole.
NOTE:
If the shuttle race thread guide (1) is in the wrong position, thread breakages, soiled thread or tangling of the thread may
occur.
The position of the shuttle race thread guide (1) is adjusted at the time of shipment from the factory. It should not be
changed if possible.
39
BAS-341H, BAS-342H
7. STANDARD ADJUSTMENTS
7-9. Rotary hook lubrication amount
<Adjusting by changing the pressure on the oil tube>
More oil
The optimum position is when the head of the set screw (1)
Less oil
is aligned with the edge of the bed. The rotary hook
lubrication amount can be adjusted within three turns to the
right from that position.
・If the set screw (1) is turned clockwise, the lubrication
amount becomes smaller.
・If the set screw (1) is turned counterclockwise, the
lubrication amount becomes greater.
* If you would like the lubrication amount to be increased
Oil tube
further from the position the head of the set screw (1) is
aligned with the edge of the bed, use the following method
More oil
Aligned
to make the adjustment.
Three turns of the set
screw (1)
Less oil
4036M
2589B
<Adjusting by changing the amount of oil supplied from
the sub-tank>
1. Remove the four screws (1), and then remove the X
motor cover (2).
2. Tilt back the machine head.
3. Insert a screwdriver into the holes in the left side of the
sewing machine bed and loosen the two bolts (3)
4. Move the sub-tank (4) up or down to adjust its position,
and then tighten the two bolts (3).
More oil
・ If the position of the sub-tank (4) is raised, the
Less oil
lubrication amount will increase.
・ If the position of the sub-tank (4) is lowered, the
lubrication amount will decrease.
5. Return the machine head to its original position.
6. Install the X motor cover (2) with the four screws (1).
4038M
BAS-341H, BAS-342H
40
7. STANDARD ADJUSTMENTS
7-10. Adjusting the position of the movable knife
3482B
5232Q 3499B
<View from side of thread trimmer cam>
Reverse position
(position where driving lever
is at its lowest point)
5255Q
5233Q
1. Open the top cover and tilt back the machine head.
2. Turn the pulley (1) by hand to lower the needle bar to its lowest position, and push the thread trimmer solenoid (2) as far
as it will go.
3. With the collar (3) inserted into the groove of the thread trimmer cam (4), turn the pulley (1) by hand to set the driving lever
(5) to the reverse position (when the thread take-up (6) is close to its lowest position).
4041M
3500B
4. Remove the rubber cap (7).
5. Loosen the bolt (8).
6. Move the movable knife connecting plate (10) back and forth to adjust so that the distance from the ridge on the right
side of the needle plate to the ridge on the movable knife (9) is 9.5 to 9.9 mm.
7. After tightening the bolt (8), check the above position once more.
41
BAS-341H, BAS-342H
7. STANDARD ADJUSTMENTS
3482B
4042M
4043M
8. Turn the pulley (1) by hand to move the needle bar to its lowest position.
9. Loosen the nut (11), tighten the set screw (12) until the collar (3) is touching the inside of the groove in the thread
trimmer cam (4), and then turn it back in the counterclockwise direction by approximately 1/4 of a turn.
10. Tighten the nut (11), and then check that the collar (3) is not touching the inside of the groove in the thread trimmer cam
(4). In addition, push the driving lever (5) by hand toward the thread trimmer cam until the collar (3) touches the groove of
the thread trimmer cam (4), and then check that the driving lever (5) returns smoothly to its original position when it is
released.
11. Check that there is a gap of about 0 - 1 mm between the outside of the hole in the movable knife (9) and the ridge line on
the shuttle race thread guide (13).
BAS-341H, BAS-342H
42
7. STANDARD ADJUSTMENTS
7-11. Replacing the movable and fixed knives
4044M
1. Loosen the two bolts (1) and then remove the feed plate (2).
2. Open the shuttle race cover, remove the two screws (3) and the two flat screws (4), and then remove the needle plate (5).
3. Remove the movable knife (6) and the fixed knife (7).
4045M
5003Q
4. Install the new fixed knife (7) in the position shown in the illustration.
5. Apply grease to the outside of the collar (8) and to the shoulder screw (9), and then install the new movable knife (6)
together with the thrust washer (10) and the movable knife spacer (11).
6. Check that the movable knife (6) and fixed knife (7) cut the thread cleanly. Replace the movable knife spacer with
accessory spacers (t=0.2, 0.3, 0.4) so that the knives trim the thread accurately.
* If the knife pressure is too weak and the thread is not completely cut, use a thinner movable knife spacer.
* If the knife pressure is too strong and the movable knife (1) turns stiffly, use a thicker movable knife spacer.
7. Apply grease to the pin (12), place it into the movable knife connecting plate (13), and install it to the needle plate (5).
8. Check that the needle is aligned with the center of the needle hole.
9. Install the feed plate (2). (Refer to the next page.)
43
BAS-341H, BAS-342H
7. STANDARD ADJUSTMENTS
7-12. Installing the feed plate
Index mark
3503B
NOTE:
Install the feed plate (1) so that the surface with the index mark is facing upward.
Place the rear edge of the feed plate (1) against the stepped part (A) of the base plate Y (2) and use a 2 mm diameter pin
(such as a DP needle) to align the hole in the feed plate (1) with the hole in the base plate Y (2); then tighten the two bolts (3).
7-13. Adjusting the thread wiper
Approx. 2mm
Approx. 3mm
4047M
5007Q
4048M
1. Loosen the two screws (3) and shift the entire solenoid setting plate (4) up or down to adjust so that the thread wiper (2) is
15 mm in front of the needle center when the plunger (1) of the thread wiper solenoid is driven to the full stroke.
2. Loosen the screw (5) and adjust the position of the thread wiper (2) so that the distance from the thread wiper to the tip of
the needle is approximately 2 mm and the tip of the thread wiper (2) is approximately 3 mm from the center of the needle
when the thread wiper (2) passes below the needle during operation
NOTE:
Check that the thread wiper (2) does not touch the finger guard (6).
BAS-341H, BAS-342H
44
7. STANDARD ADJUSTMENTS
7-14. Intermittent presser foot installation position
Install the intermittent presser foot (1) with the screw (2) so
that the distance from the bottom of the intermittent presser
foot (1) to the top of the needle plate is 22 mm when the
sewing machine is stopped and the intermittent presser foot
(1) is raised
5031Q
7-15. Adjusting the intermittent presser foot
The intermittent presser foot stroke can be adjusted to within 2 - 10 mm by adjusting the position of the stepping clamp
connecting rod and changing the installation position of stepping clamp link.
<Changing the installation position of stepping clamp link>
4049M
1. Remove the face plate.
2. Remove the two screws (1) and the two shoulder screws (2), and then remove the stepping clamp link (3).
3. Change the installation position for the stepping clamp link (3) to either A, B or C above.
If the position of the stepping clamp connecting rod is adjusted as described in the following at any one of the installation
positions, the adjustment range for the intermittent presser foot stroke will as given in the following table. (Refer to the
next page.)
Installation position
45
Intermittent presser foot stroke range
A
2 - 4.5mm
B
4.5 - 10mm
C
0mm
(Intermittent presser foot does not move up and
down)
BAS-341H, BAS-342H
5012Q
7. STANDARD ADJUSTMENTS
<Stepping clamp connecting rod position adjustment>
5014Q
Index mark
3138B
5015Q
1. Loosen the screw (1), and then open the cover (2).
2. Loosen the nut (3), and then adjust the position of the stepping clamp connecting rod (4).
・When the stepping clamp connecting rod (4) is raised, the intermittent presser foot stroke will increase.
・When the stepping clamp connecting rod (4) is lowered, the intermittent presser foot stroke will decrease.
Next, adjust the needle bar and intermittent presser foot timing.
3. Turn the pulley in the direction of the arrow to raise the needle bar from the lowest position until the lowest reference line
on the needle bar (reference line B) is aligned with the lower edge of the needle bar bush (5).
(If using a DP x 5 needle, align with the second reference line from the top (reference line b).)
4. Open the top cover and loosen the two set screws (6).
5. Align the index marks of the stepping clamp cam (7) and the stepping clamp connecting rod (4), and then tighten the two
set screws (6).
Check the following after changing the intermittent presser foot stroke.
5016Q
3501B
Needle plate
1. With the intermittent presser foot (1) lowered, turn the pulley in the direction of the arrow to move the intermittent
presser foot (1) to its lowest position.
2. Check that the intermittent presser foot (1) does not touch the needle plate and that the presser bar clamp (2) does
not touch the presser bar bush (3).
<If they are touching>
Remove the motor cover (4).
Loosen the nut (5), and turn the bolt (6) until it is pressing against the intermittent drive lever (7), and then adjust until the
two points mentioned above are not touching.
BAS-341H, BAS-342H
46
7. STANDARD ADJUSTMENTS
7-16. Adjusting the work clamp lift amount
The maximum lift amount for the work clamp (2) is 30 mm above the top of the needle plate.
Max. 30mm
5018Q
4052M
1. Turn on the air, and then depress the work clamp switch (1) to raise the work clamp (2).
2. Loosen the two bolts (4) of the work clamp lifter lever (3), and move the work clamp lifter lever (3) up or down to adjust.
7-17. Adjusting the air pressure
Lift up the handle (2) of the regulator (1) and then turn it to
adjust the air pressure to 0.5 MPa
After adjustment is complete, push the handle (2) downward
to lock it.
2565B
47
BAS-341H, BAS-342H
7. STANDARD ADJUSTMENTS
7-18. Adjusting the speed controller
You can adjust the lifting and lowering speeds for the
work clamp using the knobs on the valves.
・ When the upper knob is tightened, the lifting speed
becomes slower.
When it is loosened, the lifting speed becomes faster.
Upper knob
・ When the lower knob is tightened, the lowering speed
becomes slower.
Lower knob
When it is loosened, the lowering speed becomes faster.
Reference adjustments
Valve 2
Upper knob
Valve 1
Valve 2
Lower knob
Upper knob
Lower knob
Valve 1
Fully tighten
Fully tighten and then loosen
by 8 turns
Fully tighten and then loosen
by 5 turns
Fully tighten
You can operate the work clamp when the power is turned
off by pressing the manual buttons (1).
2566B
BAS-341H, BAS-342H
48
7. STANDARD ADJUSTMENTS
7-19. If processing the work clamp and the feed plate to a shape that
matches the sewing pattern
Process the work clamp and feed plate which match the sewing pattern, while referring to the processing diagram below.
* Values in ( ) are the recommended sizes when sewing using the maximum area (BAS-341H: 250x160 mm, BAS-342H:
300x200 mm)
BAS-341H
<Work clamp processing diagram>
Center of sewing area
3523B
<Feed plate processing diagram>
Recommended thickness 1.5 mm
[mm]
49
Center of sewing area
3524B
BAS-341H, BAS-342H
7. STANDARD ADJUSTMENTS
BAS-342H
<Work clamp processing diagram>
Center of sewing area
3525B
<Feed plate processing diagram>
Recommended thickness 1.5 mm
[mm]
Center of sewing area
3526B
BAS-341H, BAS-342H
50
8. LIST OF ERROR CODES
8. LIST OF ERROR CODES
DANGER
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the control box cover. Touching areas where high voltages are present can result in severe injury.
If a malfunction occurs with the sewing machine, a buzzer will sound and an error code will appear on the screen.
Follow the remedy procedure to eliminate the cause of the problem.
Switch-related errors
Code
The STOP switch was pressed.
E010
Press the RESET key to clear the error.
The STOP switch was pressed.
Press the RESET key to clear the error.
E011
E012
E015
E016
E020
E025
E035
E050
E051
E055
E064
E065
51
Cause of error and remedy
You can touch the
keys on the LCD panel to move the feed in order to continue sewing.
The STOP switch was pressed.
Press the RESET key to clear the error, and then depress the start switch to move the feed mechanism to the
home position.
The stop switch was still being pressed when the power was turned on, or there is a problem with the stop switch
connection.
Turn off the power, and then check that connector P9 on the main P.C. board is properly connected.
Problem with the stop switch connection.
Turn off the power, and then check that connector P9 on the main P.C. board is properly connected.
The start switch was pressed without the work clamp being lowered.
First lower the work clamp.
Start switch was being depressed when power was turned on.
Release the switch.
Work clamp switch was being depressed when power was turned on.
Release the switch.
Machine head tilting was detected after the power was turned on.
Turn off the power, and then return the machine head to its original position.
Check that connector P14 on the main P.C. board is properly connected.
Machine head tilting was detected while the sewing machine was operating.
Turn off the power, and then check that connector P14 on the main P.C. board is properly connected.
Machine head tilting was detected when the power was turned on.
Turn off the power, and then return the machine head to its original position.
Check that connector P14 on the main P.C. board is properly connected.
Touch panel was being touched when power was turned on.
Release the touch panel.
A key on the LCD panel was still being pressed when the power was turned on, or key is faulty.
Release the key.
BAS-341H, BAS-342H
8. LIST OF ERROR CODES
Motor-related errors
Code
Cause of error and remedy
The needle bar is not stopped in the needle up stop position.
E110
Turn the pulley until the point where the error display disappears.
Upper shaft did not stop at the needle up stop position when the sewing machine stopped.
E111
Turn off the power, and then check that connectors P11 and P1 on the motor P.C. board and connector P6 on the
main P.C. board are properly inserted.
Thread trimming was not completed.
E121
Turn off the power, and then check if the cutting edges of the fixed knife and movable knife are damaged or worn.
Upper shaft motor stopped due to a problem, or synchronizer is faulty.
Turn off the power, and then turn the pulley and check if the sewing machine has locked up. Check that
E130
connectors P11 and P1 on the motor P.C. board, connector P6 on the main P.C. board and the 4-pin connector of
the upper shaft motor on the motor P.C. board
Synchronizer is not connected correctly.
E131
Turn off the power, and then check that connector P11 on the motor P.C. board is properly connected.
Problem detected with upper shaft motor operation.
E132
Turn off the power, and then check that connectors P11 and P1 on the motor P.C. board, connector P6 on the
main P.C. board and the 4-pin connector of the upper shaft motor on the motor P.C. board are properly inserted.
Upper shaft motor stopping position is incorrect.
E133
Turn off the power, and then check that connectors P11 and P1 on the motor P.C. board, connector P6 on the
main P.C. board and the 4-pin connector of the upper shaft motor on the motor P.C. board are properly inserted.
Upper shaft motor is overheating, or temperature sensor is faulty.
Turn off the power, and then check the upper shaft motor.
E150
(When sewing data with a small number of stitches (15 stitches or less) is sewn repeatedly (short cycle
operation), the upper shaft motor may overheat and the “E150” error code may be generated.)
BAS-341H, BAS-342H
52
8. LIST OF ERROR CODES
Feed mechanism-related errors
Code
Cause of error and remedy
X-feed motor home position cannot be detected. Problem with X-feed motor or poor X home position sensor
connection.
E200
Turn off the power, and then check that connectors P17, P21 and P8 on the main P.C. board are properly
connected.
X-feed motor stopped due to a problem.
E201
Turn off the power, and then check if there are any problems in the X-feed direction.
Turn off the power, and then check that connectors P17 and P21 on the main P.C. board are properly connected.
X-feed motor stopped due to a problem during sewing.
E204
Turn off the power, and then check if there are any problems in the X-feed direction.
Turn off the power, and then check that connectors P17 and P21 on the main P.C. board are properly connected.
X-feed motor stopped due to a problem while moving to the sewing start position.
E205
Turn off the power, and then check if there are any problems in the X-feed direction.
Turn off the power, and then check that connectors P17 and P21 on the main P.C. board are properly connected.
X-feed motor stopped due to a problem during test feeding.
E206
Turn off the power, and then check if there are any problems in the X-feed direction.
Turn off the power, and then check that connectors P17 and P21 on the main P.C. board are properly connected.
Y-feed motor home position cannot be detected. Problem with Y-feed motor or poor Y home position sensor
connection.
E210
Turn off the power, and then check that connectors P18, P22 and P8 on the main P.C. board are properly
connected.
Y-feed motor stopped due to a problem.
E211
Turn off the power, and then check if there are any problems in the Y-feed direction.
Turn off the power, and then check that connectors P18 and P22 on the main P.C. board are properly connected.
Y-feed motor stopped due to a problem during sewing.
E214
Turn off the power, and then check if there are any problems in the Y-feed direction.
Turn off the power, and then check that connectors P18 and P22 on the main P.C. board are properly connected.
Y-feed motor stopped due to a problem while moving to the sewing start position.
E215
Turn off the power, and then check if there are any problems in the Y-feed direction.
Turn off the power, and then check that connectors P18 and P22 on the main P.C. board are properly connected.
Y-feed motor stopped due to a problem during test feeding.
E216
Turn off the power, and then check if there are any problems in the Y-feed direction.
Turn off the power, and then check that connectors P18 and P22 on the main P.C. board are properly connected.
Feed motor stopped due to a problem.
E230
Reduce the sewing speed or change the operation settings to the settings for heavy-weight materials.
Ask the place of purchase for details on the setting method.
Work clamp-related errors
Code
Cause of error and remedy
Work clamp home position cannot be detected. Problem with work clamp motor or poor work clamp home
position sensor connection.
E300
Turn off the power, and then check that connectors P19, P23 and P8 on the main P.C. board are properly
connected.
Work clamp raised or lowered position cannot be detected.
E301
Turn off the power, and then check if there are any problems in the work clamp vertical direction. Turn off the
power, and then check that connectors P19 and P23 on the main P.C. board are properly connected.
53
BAS-341H, BAS-342H
8. LIST OF ERROR CODES
Communication and memory-related errors
Code
Cause of error and remedy
Communication error detected between the main P.C. board and the panel P.C. board when the power was
turned on.
E400
Turn off the power, and then check that connector P10 on the programmer main P.C. board inside the LCD panel
and the connector on the right side of the control box and connectors P2 and P3 on the motor P.C. board are
properly connected.
Communication error detected between the main P.C. board and the motor P.C. board when the power was
turned on.
E401
Turn off the power, and then check that connector P10 on the programmer main P.C. board inside the LCD panel
and the connector on the right side of the control box and connectors P2 and P3 on the motor P.C. board are
properly connected.
Communication error detected between the main P.C. board and the panel P.C. board.
Turn off the power, and then turn it back on again. Turn off the power, and then check that connector P10 on the
E410
programmer main P.C. board inside the LCD panel and the connector on the right side of the control box and
connectors P2 and P3 on the motor P.C. board are properly connected.
Communication error detected between the main P.C. board and the motor P.C. board.
Turn off the power, and then turn it back on again. Turn off the power, and then check that connector P10 on the
E411
programmer main P.C. board inside the LCD panel and the connector on the right side of the control box and
connectors P2 and P3 on the motor P.C. board are properly connected.
No storage media is inserted.
E420
Press the RESET key to clear the error.
Insert the storage media and then try again.
The program number is invalid or it has no corresponding data.
E421
Press the RESET key to clear the error.
Check that data for this program number is present on the storage media.
Error occurred while reading from storage media.
Check the data.
E422
Press the RESET key to clear the error.
Check the data in the storage media.
Insufficient space in storage media.
E424
Press the RESET key to clear the error.
Use different storage media.
Error occurred while writing to storage media.
Check the storage media. The card may be write-protected.
E425
Press the RESET key to clear the error.
Use the specified storage media.
The program containing the specified cycle program has been cleared.
E427
Press the RESET key to clear the error. Redo the cycle program.
Data cannot be backed up to the main P.C. board (flash memory).
E430
Turn off the power, and then turn it back on again.
Data cannot be backed up to the main P.C. board (EEPROM).
E440
Turn off the power, and then turn it back on again.
Model selection cannot be read from the machine head memory.
E450
Turn off the power, and then check that connector P16 on the main P.C. board is properly connected.
Machine head memory is not connected.
Turn off the power, and then check that connector P16 on the main P.C. board is properly connected.
E452
* If you press the RESET key to clear the error, you can restart the machine using the backup data in the
machine head memory.
Problem with data in machine head memory.
E453
Turn off the power, and then turn it back on again.
The program number is invalid or it has no corresponding data. Check that data for this program number is
E471
present in the internal memory.
Internal memory is full and copying is not possible.
E474
Press the RESET key to clear the error. Clear the sewing data.
BAS-341H, BAS-342H
54
8. LIST OF ERROR CODES
Data editing-related errors
Code
Cause of error and remedy
The enlargement ratio setting caused the sewing data to extend outside the sewing area.
E500
Set the enlargement ratio again.
Press the RESET key to clear the error.
The enlargement ratio caused the data pitch to exceed the maximum pitch of 12.7 mm.
E502
Press the RESET key to clear the error. Set the enlargement ratio again.
Error in sewing data.
E510
Press the RESET key to clear the error.
If an error occurs while reading or revising the sewing data, revise the data.
No end code has been input into pattern data.
E511
Press the RESET key to clear the error.
Number of stitches exceeds allowed maximum.
E512
Press the RESET key to clear the error.
Extended option output number already exists.
E520
Change the extended option output number.
If not using the extended option output, initialize the data to clear the extended option output data.
Memory switch file cannot be read correctly.
E581
The model for the data which was read does not match the model being written to.
Press the RESET key to clear the error. Read data for the same sewing machine model.
Memory switch versions do not match.
E582
Press the RESET key to clear the error. Read data for the same version.
User program versions do not match.
E583
Press the RESET key to clear the error. Read data for the same version.
Device-related errors
Code
Cause of error and remedy
Upper thread breakage occurred. Thread the upper thread. Re-sewing is then possible.
E600
Turn off the power, and then check that connectors P9 and P36 on the main P.C. board are properly connected.
Problem with the lower thread detector.
E670
Turn off the power, and then check the lower thread detector.
55
BAS-341H, BAS-342H
8. LIST OF ERROR CODES
P.C. board-related errors
Code
Cause of error and remedy
Abnormal rise in power supply voltage.
E700
Turn off the power, and then check the input voltage.
Abnormal rise in upper shaft motor drive voltage.
E701
Turn off the power, and then check the voltage.
Abnormal drop in power supply voltage.
E705
Turn off the power, and then check the input voltage.
Abnormal current detected in upper shaft motor.
Turn off the power, and then check if there are any problems with the sewing machine.
E710
Turn off the power, and then check that connectors P11 and P1 on the motor P.C. board, connector P6 on the
main P.C. board and the 4-pin connector of the upper shaft motor on the motor P.C. board are properly inserted.
Abnormal current detected in pulse motor.
E711
Turn off the power, and then check if there are any problems with the work clamp operation.
External error input (AIRSW) detected.
E730
Turn off the power, and then check the air pressure.
Control box cooling fan does not operate.
E740
Turn off the power, and then check if the cooling fan is blocked with scraps of thread.
Check that connector P38 on the main P.C. board is properly connected.
X-feed motor cooling fan does not operate.
E741
Turn off the power, and then check if the cooling fan is blocked with scraps of thread.
Check that connector P7 on the main P.C. board is properly connected.
Y-feed motor cooling fan does not operate.
E742
Turn off the power, and then check if the cooling fan is blocked with scraps of thread.
Check that connector P7 on the main P.C. board is properly connected.
Version updating-related errors
Code
Cause of error and remedy
No main control program is present.
E860
Install the main control program.
No panel control program is present.
E870
Install the panel control program.
Version update requests cannot be received.
E880
Turn off the power, and then turn it back on again.
Version updating did not complete normally.
E881
Turn off the power, and then repeat the version update procedure.
No control program is present in the storage media.
E883
Check that the control program has been saved into the correct folder.
There is a problem with the control program.
E884
Write the correct file into the storage media.
E887~
Version updating could not be carried out. Turn off the power, and then turn it back on again.
E890
If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem,
contact the place of purchase.
BAS-341H, BAS-342H
56
9. TROUBLESHOOTING
9. TROUBLESHOOTING
・ Please check the following points before calling for repairs or service.
・ If the following remedies do not fix the problem, turn off the power and consult a qualified technician or the place of
purchase.
CAUTION
Turn off the power switch and disconnect the power cord before carrying out these operations.
The machine may operate if the foot switch is depressed by mistake, which could result in injury.
Items with a “*” in the “Reference” column should only be checked by a qualified technician.
Problem
Sewing machine does
not start when the
power is turned on and
the foot switch is
depressed.
Cause
Machine head switch does not work.
Remedy
Reference
Check if the machine head switch cord
is disconnected.
P. 12
Adjust the position of the machine head
switch.
P. 22
If the machine head switch is
malfunctioning, replace it with a new
one.
Air cock is closed.
Open the air cock.
P. 10
Air pressure is too weak.
Adjust the regulator so that the air
pressure is about 0.5 MPa.
P. 47
Speed controller has been tightened
too far.
Adjust the speed controller by
loosening it 4 turns from the
fully-tightened position.
P. 48
Thread wiper does not
work.
Thread wiper setting is OFF.
Set the thread wiper setting to ON.
(*1)
Work clamp does not
rise to the maximum
height.
Work clamp lifter lever position is
incorrect.
Adjust the position of the work clamp
lifter lever.
P. 47
Work clamp pressure is
too weak.
Air pressure is too weak.
Adjust the regulator so that the air
pressure is about 0.5 MPa.
P. 47
Work clamp pressure is
not uniform at front and
back of work clamp.
Work clamp is tilted.
Adjust the tilt of the work clamp.
Work clamp does not
work.
Thread wiper does not
operate correctly.
The thread wiper is obstructing the
needle.
Thread wiper position is incorrect.
*
Adjust the height of the thread wiper.
P. 44
Adjust the operating stroke of the
thread wiper.
P. 44
Adjust the operating stroke of the
thread wiper.
P. 44
(Continued on next page)
(*1) Refer to the “LCD Panel/Operation Panel” Instruction Manual.
57
BAS-341H, BAS-342H
9. TROUBLESHOOTING
Problem
Cause
Remedy
Reference
Lower thread winds to
one side.
Height of bobbin winder tension
assembly is incorrect.
Adjust the height of the bobbin winder
tension assembly.
P. 27
Lower thread winding
amount is incorrect.
Bobbin presser position is incorrect.
Adjust the position of the bobbin
presser.
P. 27
Amount of lower thread being fed out
from bobbin is too small.
Select a needle that is suitable for the
sewing conditions.
When threading the thread through the
needle, allow a distance of
approximately 42 mm between the
needle hole and the end of the thread.
Adjust the sub-tension so that the
upper thread trailing length after thread
trimming is approximately 42 mm.
Set the feeding amount to
approximately 30 mm.
Sewing start speed is too fast.
Adjust the sewing start speed.
Rotary hook tip is missing.
Replace the part.
Needle is too thick.
Thread unraveling at
sewing start.
Upper thread trailing length is too short.
Needle is too thin.
P. 24
P. 29
P. 27
(*1)
Select a needle that is suitable for the
sewing conditions.
P. 28
Needle is bent.
Replace the needle.
P. 23
Needle is not installed correctly.
Install the needle so that it faces
correctly.
P. 23
Needle and rotary hook tip are
touching.
Adjust the driver needle guard.
P. 39
Clearance between needle and rotary
hook tip is too large.
Adjust the needle clearance.
P. 39
Needle and rotary hook timing is
incorrect.
Adjust the timing.
P. 38
Needle is too thick.
Skipped stitches occur.
P. 28
Replace the needle hole plate with one
with a smaller needle diameter.
Material is flapping.
Use a thinner feed plate.
* Recommended thickness: 1.5 mm
Process the work clamp and the feed
plate into shapes that can hold the
material near the seam.
Adjust the intermittent height of the
intermittent presser foot.
P. 49
P. 50
(*1)
(Continued on next page)
BAS-341H, BAS-342H
58
9. TROUBLESHOOTING
Problem
Upper thread is
breaking.
Lower thread is
breaking.
Needle breaks.
Upper thread is not cut.
Lower thread is not cut.
Cause
Remedy
Reference
Thread is too thick for the needle.
Select a thread which is suitable for the
needle.
P. 28
Needle is not installed correctly.
Install the needle so that it faces
correctly.
P. 23
Thread is not threaded correctly.
Thread the thread correctly.
P. 24
Damage or burring in parts such as the
rotary hook, needle hole plate, needle
or thread path.
Needle and rotary hook timing is
incorrect.
Repair the respective part by buffing it.
Alternatively, replace the part.
Adjust the timing.
P. 38
Upper thread tension is too strong.
Reduce the upper thread tension.
P. 29
Thread take-up spring tension is too
strong.
Reduce the tension of the thread
take-up spring.
P. 37
Thread breaks due to heat.
Use a needle cooler unit (optional).
Reduce the sewing speed.
P. 24
(*1)
Damage to the needle hole plate or
bobbin case.
Repair the respective part by buffing it.
Alternatively, replace the part.
Lower thread tension is too strong.
Reduce the lower thread tension.
P. 28
Needle is bent.
Replace the needle.
P. 23
Needle is too thin.
Select a needle that is suitable for the
sewing conditions.
P. 28
Adjust the driver needle guard.
P. 39
Adjust the needle clearance.
P. 39
Needle and rotary hook timing is
incorrect.
Adjust the timing.
P. 38
Feed timing is too slow.
Advance the feed timing.
Movable knife is blunt.
Replace the movable knife with a new
one.
P. 43
Fixed knife is blunt.
Sharpen the fixed knife or replace it
with a new one.
P. 43
Adjust the timing.
P. 38
Adjust the standby position of the
movable knife.
P. 41
P. 42
Movable knife is not picking up the
needle thread because the last stitch is
being skipped.
Refer to "Skipped stitches occur".
P. 58
Lower thread tension is too weak.
Increase the lower thread tension.
P. 28
Needle and rotary hook tip are
touching.
Movable knife is not picking up the
upper thread.
*
(Continued on next page)
59
BAS-341H, BAS-342H
9. TROUBLESHOOTING
Problem
Cause
Upper thread is not
tight.
Remedy
Reference
Needle is too thin.
Select a needle that is suitable for the
sewing conditions.
P. 28
Hole diameter in needle hole plate is
too small.
Replace the needle hole plate with one
with a larger hole diameter.
Feed plate is too thin.
Use a thicker feed plate.
*Recommended thickness: 1.5 mm
Hole diameter of intermittent presser
foot is too small.
Sliding parts of outer rotary hook and
inner hook have little or no sewing
machine oil.
Damage or burring in parts such as the
rotary hook, needle hole plate, needle
or thread path.
Replace the intermittent presser foot
with one with a larger hole diameter.
Lower thread tension is too strong.
Reduce the lower thread tension.
Thread take-up spring tension is too
weak.
Feed timing is too fast.
Retard the feed timing.
Intermittent height of
presser foot is too low.
Needle and
touching.
rotary
intermittent
hook
tip
are
0573M
Lower thread tension is too weak.
Upper thread tension is too strong.
0574M
Poor seam finish on
underside of material at
the sewing start.
Upper thread trailing length is too long.
Movable knife is blunt.
Upper thread trailing
length is irregular.
Pattern is distorted.
P. 21
Repair the respective part by buffing it.
Alternatively, replace the part.
Increase the upper thread tension.
*Adjust the upper thread tension after
adjusting the lower thread tension.
Increase the tension of the thread
take-up spring.
Upper thread tension is too weak.
Lower thread is not
tight.
Lubricate the felts for the sliding parts
of the outer rotary hook and inner hook.
P. 28
P. 29
P. 37
*
Adjust the intermittent height of the
intermittent presser foot.
(*1)
Adjust the driver needle guard.
P. 39
Adjust the needle clearance.
P. 39
Increase the lower thread tension.
P. 28
Reduce the upper thread tension.
*Adjust the upper thread tension after
adjusting the lower thread tension.
Adjust the sub-tension so that the
upper thread trailing length after thread
trimming is approximately 42 mm.
Replace the movable knife with a new
one.
P. 29
P. 29
P. 43
Fixed knife is blunt.
Sharpen the fixed knife or replace it
with a new one.
P. 43
Sub-tension is too weak.
Adjust the sub-tension.
P. 29
Thread take-up spring tension is too
weak.
Increase the tension of the thread
take-up spring.
If using a heavy work clamp and feed
plate, change the operation settings to
the settings for heavy-weight materials.
Ask the place of purchase for details on
the setting method.
Work clamp and feed plate are too
heavy.
BAS-341H, BAS-342H
P. 37
*
60
INSTRUCTION MANUAL
* Please note that the contents of this manual may differ slightly from the actual product purchased as a result of product improvements.
© 2015 Brother Industries, Ltd. All Rights Reserved.
This is the original instructions.
BAS-341H, BAS-342H
I5081061B E
2015.09. B (1)
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