Model SAR 331
USE AND MAINTENANCE MANUAL
SAR 331 SA
GDS
THOMAS
01/2003
THOMAS S.p.A. - Via Pasubio, 32 - 36033 Isola Vicentina (VI) - Telephone 0444 / 97.61.05 - Fax 0444 / 97.69.34
Registro Imprese n. 4272//VI116 REA n. 93906/Vicenza
SAR 331 SA GDS
Contents
Contents ........................................................................... "
Ordering spare parts ........................................................ "
Guarantee ........................................................................ "
Machine certification and identification marking ............. "
CHAPTER 1
Reference to accident-prevention regulations .................. "
1.1 - Advice for the operator ............................................. "
1.2 - Location of shields against accidental contact with
the tool ..................................................................... "
1.3 - Electrical equipment according to European
Standard "CENELEC EN 60 204-1" ....................... "
1.4 - Emergencies according to European Standard
"CENELEC EN 60 204-1" ....................................... "
1.5 - Other risks ............................................................... "
2
2
2
3
4
4
4
5
5
5
CHAPTER 2
Recommendations and advice for use ....................... "
2.1 - Recommendations and advice for using the machine . "
5
5
CHAPTER 3
Technical characteristics ............................................. "
3.1 - Table of cutting capacity and technical details ....... "
6
6
CHAPTER 4
Machine dimensions - Transport - Installation
Dismantling .................................................................... "
4.1 - Machine dimensions .............................................. "
4.2 - Transport and handling of the machine ................. "
4.3 - Minimum requirements for the premises
housing the machine .............................................. "
4.4 - Anchorage of standard machine ............................ "
4.5 - Instructions for electrical connection ...................... "
4.6 - Instructions for assembly of the loose parts and
accessories ............................................................. "
4.7 - Disactivating the machine ...................................... "
4.8 - Dismantling ............................................................. "
6
6
7
7
7
7
7
7
7
CHAPTER 5
Machine functional parts .................................................. "
5.1 - Operating head or saw frame .................................... "
5.2 - Vice .......................................................................... "
5.3 - Bed .......................................................................... "
7
7
7
7
CHAPTER 6
Description of the operating cycle .................................... "
6.1 - Starting up and cutting cycle ..................................... "
8
8
CHAPTER 7
Regulating the machine ................................................ " 10
7.1 - Blade tension assembly ......................................... “
7.2 - Blade guide blocks ................................................. “
7.3 - Vice ......................................................................... “
7.4 - Regulating the cutting angle .................................. “
7.5 - Blade-cleaning brush ............................................. “
7.6 - Regulating the height of the cut ............................. “
7.7 - Regulating the cutting speed ................................. "
7.8 - Regulating the saw frame return spring ................. "
7.9 - Changing the blade ................................................ "
7.10- Replacing saw frame return spring ........................ "
10
10
10
11
11
11
11
12
12
12
CHAPTER 8
Routine and special maintenance ............................... "
8.1 - Daily maintenance ................................................. "
8.2 - Weekly maintenance .............................................. "
8.3 - Monthly maintenance ............................................. "
8.4 - Six-monthly maintenance ....................................... "
8.5 - Oils for lubricating coolant ...................................... "
8.6 -Oil disposal ............................................................... "
8.7 - Special maintenance .............................................. "
12
12
12
13
13
13
13
13
CHAPTER 9
Material classification and choice of tool .................... "
9.1 - Definition of materials ............................................. "
9.2 - Selecting blade ....................................................... "
9.3 - Teeth pitch .............................................................. "
9.4 - Cutting and advance speed ................................... "
9.5 - Blade running-in ..................................................... "
9.6 - Blade structure ....................................................... "
9.7 - Blade type ............................................................... "
Tooth shape and angle ........................................... "
Set ........................................................................... "
14
14
14
14
15
15
15
15
15
16
9.7.1 - Table of recommended cutting parameters .............. "
16
CHAPTER 10
Machine components ................................................... " 17
10.1- List of spare parts ................................................... " 17
CHAPTER 11
Wiring diagrams ............................................................... " 2 2
Schema elettrico idraulico ................................................ " 2 4
CHAPTER 12
Troubleshooting ................................................................ " 2 5
12.1- Blade and cutting diagnosis ....................................... " 2 5
12.2- Electrical components diagnosis ................................ " 2 9
CHAPTER 13
Noise tests ....................................................................... " 2 9
Plates and labels .............................................................. " 3 0
Ordering spare parts
- When ordering spare parts you must state:
MACHINE MODEL
SERIAL NUMBER
PART REFERENCE NUMBER
Without these references WE WILL NOT SUPPLY the spares. See point 10.1 - list of spare parts -
Guarantee
- The Company guarantees that the machine to which this manual refers has been designed and built to comply with safety regulations and
that it has been tested for functionality in the factory.
- The machine is guaranteed for 12 months: the guarantee does not cover the electric motors, electric components, pneumatic components
or any damage due to dropping or to bad machine management, the failure to observe maintenance standards or bad handling by the
operator.
- The buyer has only the right to replacement of the faulty parts, while transport and packing costs are at his expense.
- The serial number on the machine is a primary reference for the guarantee, for after-sales assistance and for identifying the machine for any
necessity.
2
SAR 331 SA GDS
Machine certification and identification marking
MACHINE LABEL
via Pasubio, 32 36033 ISOLA VIC. - ITALIA
MODEL
TYP
SAR
331 SA GDS
SERIAL NUMBER
YEAR OF MANUFACTURE
(Space reserved for the NAME and STAMP of the DEALER and/or IMPORTER)
3
SAR 331 SA GDS
1 REFERENCE TO ACCIDENT - PREVENTION REGULATIONS
This machine has been built to comply with the national and community accident-prevention regulations in force. Improper use
and/or tampering with the safety devices will relieve the manufacturer of all responsibility.
1.1 - Advice for the operator
- Check that the voltage indicated on the plate, normally fixed to the machine motor, is the same as the line voltage.
- Check the efficiency of your electric supply and earthing system; connect the power cable of the machine to the socket and the earth
lead yellow-green in colour) to the earthing system.
- When the saw frame is in suspend mode (up) the toothed blade must not move.
- Only the blade section used for cutting must be kept unprotected. Remove guarding by operating on the adjustable head.
- It is forbidden to work on the machine without its shields (these are all blue or grey in colour).
- Do not use any artful system or device (for ex. shim) to prevent the vice from locking the workpiece. Do not hold the workpiece with
your hand during the cutting process.
- Do not charge the workpiece from the right to the left-hand side with respect of the machine front.
- Always disconnect the machine from the power socket before blade change or carrying out any maintenance job, even in the case
of abnormal machine operation.
- Always wear suitable eye protection.
- Never put your hands or arms into the cutting area while the machine is operating.
- Do not wear loose clothing with sleeves that are too long, gloves that are too big, bracelets, chains or any other object that could get
caught in the machine during operation; tie back long hair.
- Keep the area free of equipment, tools or any other object.
- Perform only one operation at a time and never have several objects in your hands at the same time. Keep your hands as clean as
possible.
- All internal and/or internal operations, maintenance or repairs, must be performed in a well-lit area or where there is sufficient light
from extra sources so as to avoid the risk of even slight accidents.
1.2 - Location of shields against accidental contact with the tool
- Blue or grey metal shield fixed frontally with screws to the fixed blade-guiding block (Ref. A).
- Blue or grey shield fixed with screws to the adjustable blade-guiding block. Guarantees that the section of blade which exceeds the
piece to be cut is covered (Ref. B).
- Grey metal casing fixed with hooks to the frame. Protects the flywheels from blade dragging (Ref. C).
B
C
4
A
C
SAR 331 SA GDS
1.3 - Electrical equipment according to European Standard "CENELEC EN 60 204-1" which assimilates,
with some integrating modifications, the publication "IEC 204-1"
- The electrical equipment ensures protection against electric shock as a result of direct or indirect contact. The active parts of this
equipment are housed in a box to which access is limited by screws that can only be removed with a special tool; the parts are fed
with alternating current at low voltage (24 V). The equipment is protected against splashes of water and dust.
- Protection of the system against short circuits is ensured by means of rapid fuses and earthing; in the event of motor overload,
protection is provided by a thermal relay.
- In the event of a power cut, the specific start-up button must be reset.
- The machine has been tested in conformity with point 20 of EN 60204.
1.4 - Emergencies according to European Standard "CENELEC EN 60 204-1"
- In the event of incorrect operation or of danger conditions, the machine may be stopped immediately by pressing the red mushroom
button.
- The casual or voluntary removal of the protection shield of the flywheels causes the stepping-in of a microswitch that automatically
stops all machine functions.
- In case blade breaks, the band tightening microswitch/pressure switch disconnects all machine.
NOTE: Resetting of machine operation after each emergency stop is achieved by reactivating the specific restart button.
1.5 - OTHER RISKS
- As the machine is running, any intervention from the operator within the “dangerous zone” or cutting area must be considered a risk
for his own safety.
2
RECOMMENDATIONS AND
ADVICE FOR USE
2.1 - Recommendations and advice for using the machine
- The machine has been designed to cut metal building materials, with different shapes and profiles, used in workshops, turner’s
shops and general mechanical structural work.
- Only one operator is needed to use the machine, that must stand as shown in the picture.
Before starting each cutting operation, ensure that the part is firmly gripped in the vice and that the end is suitably supported.
These figures show examples of suitable clamping of different section bars, bearing in mind the cutting capacities of the machine in
order to achieve a good efficiency and blade durability.
- Do not use blades of a different size from those stated in the machine specifications.
- If the blade gets stuck in the cut, release the running button immediately, switch off the machine, open the vice slowly, remove the part
and check that the blade or its teeth are not broken. If they are broken, change the tool.
- Check saw frame return spring to ensure proper balancing.
- Before carrying out any repairs on the machine, consult the dealer or apply to THOMAS.
5
SAR 331 SA GDS
3
TECHNICAL
CHARACTERISTICS
3.1 - Table of cutting capacity and technical details
4
MACHINE DIMENSIONS
TRANSPORT
INSTALLATION
DISMANTLING
4.1 - Machine dimensions
0°
330
330x330
480x130
45° DX
310
280x280
300x250
45° SX
300
250x250
280x250
60°
200
180x180
180x200
2050
CAPACITA` DI
TAGLIO
2150
Blade motor
KW
1.5
Hydraulic motor
KW
0.37
Pump electric
KW
0.18
flywheel diameter
mm
390
Blade dimensions
mm
3810x27x0.9
Cutting speed
m/1'
21 ÷ 116
Vice opening
mm
485
°
25
Height of pieces bearing surface
mm
740
Machine weight
Kg
720
Saw frame inclination
1600
6
SAR 331 SA GDS
4.2 - Transport and handling of the machine
If the machine has to be shifted in its own packing, use a fork-lift
truck or sling it with straps as illustrated.
- Position the machine on a firm cement floor, maintaining, at the
rear, a minimum distance of 1000 mm from the wall; anchor it to
the ground as shown in the diagram, using screws and expansion
plugs or tie rods sunk in cement, ensuring that it is sitting level.
4.5 - Instructions for electrical connection
- The machine is not provided with an electric plug, so the customer
must fit a suitable one for his own working conditions:
1 - WIRING DIAGRAM FOR 4-WIRE SYSTEM FOR THREEPHASE MACHINE - SOCKET FOR A 16A PLUG
R = L1
S = L2
T = L3
PE = GND
4.3 - Minimum requirements for the premises
housing the machine
- Mains voltage and frequency complying with the machine motor
characteristics.
- Environment temperature from -10 °C to +50 °C.
- Relative humidity not over 90%.
4.4 - Anchorage of standard machine
INGOMBRO OPERATIVO = mm 2300
INGOMBRO OPERATIVO = mm 2100
4.6 - Instructions for assembly of the loose parts and
accessories
Fit the components supplied as indicated in the photo:
- Mount the stock stop.
- Mount the coolant liquid holder.
4.7 - Disactivating the machine
- If the sawing machine is to be out of use for a long period, it is
advisable to proceed as follows:
1) detach the plug from the electric supply panel
2) loosen blade
3) release the arch return spring
4) empty the coolant tank
5) carefully clean and grease the machine
6) if necessary, cover the machine.
4.8 - Dismantling
(because of deterioration and/or obsolescence)
General rules
If the machine is to be permanently demolished and/or scrapped,
divide the material to be disposed of according to type and composition, as follows:
1) Cast iron or ferrous materials, composed of metal alone, are secondary raw materials, so they may be taken to an iron foundry
for re-smelting after having removed the contents (classified in
point 3);
2) electrical components, including the cable and electronic ma-terial
(magnetic cards, etc.), fall within the category of material classified as being assimilable to urban waste according to the laws of
the European community, so they may be set aside for collection
by the public waste disposal service;
3) old mineral and synthetic and/or mixed oils, emulsified oils and
greases are special refuse, so they must be collected, transported
and subsequently disposed of by the old oil disposal service.
7
SAR 331 SA GDS
NOTE: since standards and legislation concerning refuse in general is in a state of continuous evolution and therefore
subject to changes and variations, the user must keep
informed of the regulations in force at the time of disposing
of the machine tool, as these may differ from those
described above, which are to be considered as a general
guide line.
5
5.3 - Bed
- Structure supporting the HEAD OR SAW FRAME, the VICE, the
SWIVEL DEVICE with relative locking system, the ELECTRICALS,
the BAR STOP and housing the coolant TANK for cut and pump.
MACHINE FUNCTIONAL
PARTS
5.1 - Operating head or saw frame
- Machine part consisting of the members that transfer the motion
(gearmotor, flywheels), the tightening/guiding (blade guide arms,
blade tightening slide) and the tool lowering control.
DESCRIPTION OF THE
6 OPERATING
CYCLE
Before operating, all the main organs of the machine must
be set in optimum conditions (see the chapter on “Regulating the machine”).
6.1 - Getting started
DESCRIPTION OF THE CUTTING CYCLE:
-
5.2 - Vice
- Manual locking system for cutting material using the hand wheel.
This device allows for the quick shifting of the vice and the possibility
to cut inclinations to the left and right.
-
Manual closing of the vice;
Activation of the cutting cycle;
Independent lowering of the blade-carrying
frame;
Frame raising (with selector);
Manual opening of the vice.
PRELIMINARY OPERATIONS:
- Make sure that the machine is equipped with all the protections described in paragraph 1.2 of chapter 1.
- Position the side draining system (supplied with the machine)
on the base.
- Make sure that the machine is not in an emergency stop. If it
is, release the red mushroom pushbutton (1) on the command panel.
- Rotate the belt-tightening handwheel (8) until the relative
microswitch activates.
- Rotate the main switch (2) to position 1.
- Press the pushbutton with light (4) and make sure that the
relative indicator lights up.
- Use the selector (5) to raise the frame.
NB: invert the electric supply phases if the frame does not rise
(this should only be done during installation).
8
SAR 331 SA GDS
- Open the vice according to the dimensions of the material to
be cut.
- Place the material to be cut in the vice and lock using the
handwheel. Make sure that the relative pawl is interlocked
with the rack.
- Free the hand lever and move the mobile belt-guiding arm as
close as possible to the piece to be cut (up to approx. 10mm)
then lock the hand lever.
- Make sure that the cutting angle corresponds to the desired
inclination and that the angling device is locked using the
relative lever (see paragraph 7.4 of chapter 7).
- Make sure that the hydraulic regulator (6) is fully closed, then
rotate counter clockwise to set the most suitable lowering
speed for the characteristics of the material to be cut. It is
advisable to always start from a cautionary speed and increase subsequently if necessary.
2
4
3
- Always make sure that the vice is positioned at the extreme
right or left of the countervice to avoid accidental contact with
the frame.
- Before starting the cutting cycle it is advisable to move the
blade to approx. 10mm from the piece to be cut, using the
selector (5) if necessary.
- Press the pushbutton (3) to start the cutting cycle. Make sure
that the belt turns in the correct direction and that a sufficient
quantity of cooling liquid exits.
NB: The weight of the blade-carrying frame causes it to lower
automatically without needing the intervention of Operator. If
greater cutting pressure is necessary, modify the tightness of
the frame return spring (see paragraph 7.8 of chapter 7).
- Use the variator group handwheel to set the most suitable
cutting speed for the material to be cut. This operation must
always be carried out while the motor is running).
To set the necessary speed, refer to the plate applied onboard the machine or shown below.
- Press the emergency pushbutton if incorrect manoeuvres are
made, or if the cutting cycle is to be stopped.
- When finished cutting, the frame stops in the lower position.
Use the selector (5) to raise the frame.
NB: Do not use the sawing machine at full material discharge speed during the first 50 working hours.
SAR
START
1
Keep a safe distance from the cutting area during machine
operation.
5
6
1
CUTTING DIRECTION
8
The sawing machine is now ready to start working. Please
remember that the CUTTING SPEED and the TYPE of blade
when combined with suitable frame lowering have a determinate effect on the cutting quality and machine return (for more
information on this topic, refer to the "Material classification
and blade choice" chapter)
- When starting to cut with a new blade, it is necessary to
exert a light pressure on the piece during the first two or
three cuts, in order to use a cutting time that is almost
double the normal one (refer to the Blade breaking-in paragraph in the "Material classification and blade choice" chapter further on in this manual).
- Use the red emergency pushbutton (1) when dangerous conditions or faults in general arise. Doing so immediately interrupts machine operation.
9
SAR 331 SA GDS
7
REGULATING
THE MACHINE
4
7.1 - Blade tension assembly
5
6
The ideal blade tension is obtained by turning the belt-tightening handwheel until the relative microswitch activates (B).
The position of the microswitch is established by an instrument that measures the blade stretch. This regulation must not
be modified.
NB: it is advisable to loosen the blade tension when the saw is not
being used.
It is advisable to always use blades having the dimensions declared
in this manual.
7
3
B
2
8
2
1
0,04
7.3 - Vice
7.2 - Blade-guiding arms and plates
- The vice can be made to move rapidly towards the piece to be
cut by keeping the hand lever (C) raised and moving the vice
manually. Before using the handwheel to lock the material to
be cut, make sure that the hand lever is interlocked with the
rack.
- The vice group can be positioned to the right or left of the
blade. If positioning is not fully completed, the sawing machine can be permanently damaged by the lowering movement of the frame.
- Always keep the vice guide and relative thread clean and
oiled.
The blade is guided by plates that are regulated during the
testing phase according to the thickness of the blade. The minimum clearance indicated in the figures should be maintained.
When the blade is to be replaced, make sure to always fit belts
with a 0.9 mm thickness because the blade-guiding plates have
been regulated for this thickness. If using toothed belts with
different thicknesses a new regulation must be carried out as
follows:
- Loosen the screw (1) and unscrew the grub screws (2), widening the space between the plates.
- Loosen the nuts (3) and the grub screws (4) and rotate the
pins (5 - 6) to widen the space between the bearings (7).
- Insert the new blade, then place the plate (8) against it. Tighten
the grub screws (2), leaving a 0.04 mm clearance to ensure
that the toothed belt slides well. After this, tighten the relative
nuts and the screw (1).
- Rotate the pins (5 - 6) until the bearings lean against the
blade, as indicated in the figure. Lock the grub screws (4) and
the nuts (3).
C
10
SAR 331 SA GDS
7.4 - Regulating the cutting angle
- Raise the frame to a position that avoids contact with the piece
supporting surface and the material to be cut.
- Push the lever (D) to the left in order to free the rotation device.
- Rotate the frame group to the necessary angle, referring to
the graduated sector.
- Use the mechanical stops on the machine base to make positioning at 45° / 60° easier. If necessary, rotate the mechanical
stops to permit movement of the rotating arm.
- When finished, push the lever (D) to the right in order to lock
the rotation device.
D
7.7 - Regulating the cutting speed
The cutting speed should only be regulated while the belt rotation motor is running.
Use the relative handwheel and refer to the relative plate in
order to set the necessary speed.
POS. N°
m/min.
POS. N°
m/min.
7.5 - Blade-cleaning brush
0
21
19
66
This is an excellent accessory for cleaning the blade during the
cutting cycle. Periodically check brush integrity and if necessary regulate further to guarantee perfect blade cleaning.
1
23,5
20
68
2
26
21
71,5
3
28,5
22
74,5
4
31
23
78
5
33,5
24
81,5
6
36
25
85
7
38,5
26
87,5
8
41
9
43,5
27
90
10
46
28
93
11
48,5
29
96
12
51
30
99
SAR
13
53,5
31
102,5
START
14
56
32
105,5
15
58,5
33
108,5
16
61
34
111
17
62,5
35
113,5
18
64,5
36
116
7.6 - Regulating the cutting height
With this accessory it is possible to raise the frame and/or
move it closer to the piece to be cut.
- Use the selector (E) to move the frame to the necessary position.
- It is advisable to position the blade at a distance of 10mm from
the material to be cut.
- To permit the frame lowering movement, open the hydraulic
regulator on the command panel.
1
2
E
11
SAR 331 SA GDS
7.8 - Regulating the frame raising spring
- It is possible to modify the tension of the frame return spring in
order to obtain increased cutting pressure while lowering to
cut.
- Loosen the nut (F) to remove tension from the spring until the
desired tension has been reached.
- NB: the spring tension should not be loosened in an exaggerated manner. Doing so can influence the balance of the bladecarrying frame.
F
7.10 – Replacement of the return spring arch
- During the entire operation, it will be necessary to keep the
arch lifted and secured.
- First loosen the tension spring and unhook it from the
supporting spring immediately behind.
PROBABLE REPLACEMENT OF OTHER PARTS –
REDUCTION GEAR OR SPEED CONTROL, MOTOR PUMP
AND ELECTRICAL COMPONENTS – TO BE EXECUTED BY
SPECIALISED AND COMPETENT PERSONNEL.
8
ROUTINE
AND SPECIAL
MAINTENANCE
THE MAINTENANCE JOBS ARE LISTED BELOW, DIVIDED INTO
DAILY, WEEKLY, MONTHLY AND SIX-MONTHLY INTERVALS. IF
THE FOLLOWING OPERATIONS ARE NEGLECTED, THE RESULT
WILL BE PREMATURE WEAR OF THE MACHINE AND POOR
PERFORMANCE.
BEFORE PERFORMING THE FOLLOWING OPERATIONS, THE
ELECTRIC POWER SUPPLY AND THE POWER CABLE MUST
BE COMPLETELY DISCONNECTED.
7.9 – Replacing the blade
- Raise the frame to the high position.
- Use the handwheel to loosen the blade, remove the mobile
blade-guiding shield and the belt-cleaning brush shield.
- Open first the rear then the front flywheel casing and extract
the old blade from the flywheels and the blade-guiding blocks.
- Position the new blade, placing it firstly among the plates and then
on the flywheel seats. Make sure that the teeth are positioned in the
correct direction for cutting (see drawing below).
- Tighten the blade, making sure it adapts perfectly to the flywheel seats.
- Reposition the mobile blade-guiding shield, the belt-cleaning
brush shield and close the flywheel casings. Make sure that
the safety microswitch activates, otherwise the machine will
not start when powered again.
WARNING: always use blades having the dimensions specified in this manual and for which the blade guide heads
have been set: otherwise, see chapter on "Description of
the operating cycle" in the Starting-up section.
CUTTING DIRECTION
12
8.1 - Daily maintenance
-
General cleaning of the machine to remove accumulated shavings.
Clean the lubricating coolant drain hole to avoid excess fluid.
Top up the level of lubricating coolant.
Check blade for wear.
Rise of saw frame to top position and partial slackening of the
blade to avoid useless yield stress.
- Check functionality of the shields and emergency stops.
8.2 - Weekly maintenance
- More accurate general cleaning of the machine to remove shavings, especially from the lubricant fluid tank.
- Removal of pump from its housing, cleaning of the suction filter
and suction zone.
- Clean the filter of the pump suction head and the suction
area.
- Cleaning with compressed air of blade guide arms (guide
bearings, pads and drain hole of the lubricating cooling).
- Cleaning flywheel housings and blade sliding surfaces on
flywheels.
- Check condition of the blade cleaning brushes.
- Greasing of motor flywheel bearings.
SAR 331 SA GDS
8.3 - Monthly maintenance
- Check the tightening of the motor flywheel screws.
- Check that the blade guide bearings on arms are perfect running
condition.
- Check the tightening of the screws of the gearmotor, pump and
accident protection guarding.
8.4 - Six-monthly maintenance
REDUCER:
- It is advisable to carry out the first oil change after around 300
working hours. Wash the internal parts accurately. Use synthetic lubricant of the SHELL TIVELA OIL SC 320 type or similar.
- The next oil change should be carried out after approx. 2000
working hours.
VARIATOR:
- Replace the variator oil after approx. 2000 working hours. Use
SHELL DONAX TA oil or similar.
- NB: never mix synthetic oil with mineral oil.
- Completely replace the hydraulic switchboard oil at least once
every year. Use SHELL HYDRAULIC OIL 32 or similar.
- Carry out a continuity test on the unipotential protection circuit.
8.5 - Oils for lubricating coolant
Considering the vast range of products on the market, the user
can choose the one most suited to his own requirements, using
as a reference the SHELL LUTEM OIL ECO type.
THE MINIMUM PERCENTAGE OF OIL DILUTED IN WATER IS
8 - 10 %.
8.6 - Oil disposal
The disposal of these products is controlled by strict regulations. Please see the Chapter on “Machine dimensions - Transport - Installation” in the section on Dismantling.
8.7 - Special maintenance
Special maintenance operations must be carried out by skilled
personnel.
However, we advise contacting THOMAS or their dealer and/or
importer. Adjusting the protective and safety equipment and
devices, the reducer, the motor, the motor pump and electric
components are classed as special maintenance operations.
13
SAR 331 SA GDS
9
MATERIAL
CLASSIFICATION AND
CHOICE OF TOOL
Since the aim is to obtain excellent cutting quality, the various
parameters such as hardness of the material, shape and thickness, transverse cutting section of the part to be cut, selection of the type of cutting blade, cutting speed and control of
saw frame lowering.These specifications must therefore be harmoniously combined in a single operating condition according to
practical considerations and common sense, so as to achieve
an optimum condition that does not require countless operations to prepare the machine when there are many variations in
the job to be performed.The various problems that crop up from
time to time will be solved more easily if the operator has a good
knoledge of these specifications.
WE THEREFORE RECOMMEND YOU TO ALWAYS USE
GENUINE SPARE BLADES THAT GUARANTEE SUPERIOR
QUALITY AND PERFORMANCE.
9.1 - Definition of materials
The table at the foot of the page lists the characteristics of the materials to be cut, so as to choose the right tool to use.
be cut, according to these criteria:
- parts with a thin and/or variable section such as profiles, pipes
and plate, need close toothing, so that the number of teeth used
simultaneously in cutting is from 3 to 6;
- parts with large transverse sections and solid sections need widely
spaced toothing to allow for the greater volume of the shavings
and better tooth penetration;
- parts made of soft material or plastic (light alloys, mild bronze,
teflon, wood, etc.) also require widely spaced toothing;
- pieces cut in bundles require combo tooth design.
9.3 - Teeth pitch
As already stated, this depends on the following factors:
- hardness of the material
- dimensions of the section
- thickness of the wall.
BLADE TEETH SELECTION TABLE
THICKNESS MM
Z CONTINUOUS
TOOTH DESIGN
Z COMBO
TOOTH DESIGN
TILL 1.5
14
10/14
FROM 1 TO 2
8
8/12
FROM 2 TO 3
6
6/10
FROM 3 TO 5
6
5/8
FROM 4 TO 6
6
4/6
MORE THAN 6
4
4/6
9.2 - Selecting blade
First of all the pitch of the teeth must be chosen, in the other words,
the number of teeth per inch (25,4 mm) suitable for thematerial to
S = THICKNESS
TYPES OF STEEL
CHARACTERISTICS
Hardness Hardness
GB
USA
BRINELL ROCKWELL
SB
AISI-SAE
HB
HRB
------116
67
43
---148
80
50
---180
88
060 A 20
1020
198
93
060 A 40
1040
198
93
---1050
202
94
060 A 62
1060
202
94
735 A 50
6150
207
95
---9262
224
98
360÷480
430÷560
510÷660
540÷690
700÷840
760÷900
830÷980
1140÷1330
1220÷1400
35CD4
39NCD4
40CADG12
708 A 37
---905 M 39
4135
9840
----
220
228
232
98
99
100
780÷930
880÷1080
930÷1130
----
20NCD7
En 325
4320
232
100
760÷1030
20NiCrMo2
21NiCrMo2
20NCD2
805 H 20
4315
224
98
690÷980
100Cr6
100Cr6
100C6
534 A 99
52100
207
95
690÷980
---S-1
D6-D3
S5
410
304
---316
244
212
252
244
202
202
202
202
220
140
120
100
212
232
222
102
96
103
102
94
94
94
94
98
77
69
56,5
96
100
98
800÷1030
710÷980
820÷1060
800÷1030
670÷885
590÷685
540÷685
490÷685
620÷685
375÷440
320÷410
265÷314
245
600
420
Spring
steels
I
UNI
Fe360
Fe430
Fe510
C20
C40
C50
C60
50CrV4
60SiCr8
D
DIN
St37
St44
St52
CK20
CK40
CK50
CK60
50CrV4
60SiCr7
F
AF NOR
E24
E28
E36
XC20
XC42H1
---XC55
50CV4
----
Alloyed steels for
hardening and
tempering and for
nitriding
35CrMo4
39NiCrMo4
41CrAlMo7
34CrMo4
36CrNiMo4
41CrAlMo7
Alloyed
casehardening
steels
18NiCrMo7
USE
Construction
steels
Carbon
steels
Alloyed for
bearings
52NiCrMoKU 56NiCrMoV7C100K
------C100KU
C100W1
---BS 1
X210Cr13KU
X210Cr12
Z200C12 BD2-BD3
58SiMo8KU
---Y60SC7
---X12Cr13
4001
------Stainless
X5CrNi1810
4301
Z5CN18.09 304 C 12
X8CrNi1910
---------steels
X8CrNiMo1713
4401
Z6CDN17.12 316 S 16
Copper alloys Aluminium copper alloy G-CuAl11Fe4Ni4 UNI 5275
Special manganese/silicon brass G-CuZn36Si1Pb1 UNI5038
Special brass
Manganese bronze SAE43 - SAE430
Bronze
Phosphor bronze G-CuSn12 UNI 7013/2a
Gray pig iron
G25
Cast iron
Spheroidal graphite cast iron GS600
Malleable cast iron
W40-05
Tool steel
14
R=N/mm²
SAR 331 SA GDS
SOLID Ø OR L MM
Z CONTINUOUS
TOOTH DESIGN
Z COMBO
TOOTH DESIGN
TILL 30
8
5/8
FROM 30 TO 60
6
4/6
FROM 40 TO 80
4
4/6
MORE THAN 90
3
3/4
9.7 - Blade type
They differ essentially in their constructive characteristics, such as:
- shape and cutting angle of tooth
- pitch
- set
Shape and angle of tooth
Ø = DIAMETER
L = WIDTH
REGULAR TOOTH: 0° rake and constant pitch.
9.4 - Cutting and advance speed
The cutting speed (m/min) and the advance speed (cm2/min = area
travelled by the disk teeth when removing shavings) are limited by
the development of heat close to the tips of the teeth.
- The cutting speed is subordinate to the resistance of the material
(R = N/mm2), to its hardness (HRC) and to the dimensions of the
widest section.
- Too high an advance speed (= lowering of the saw frame) tends to
cause the disk to deviate from the ideal cutting path, producing
non rectilinear cuts on both the vertical and the horizontal plane.
Most common form for transversal or inclined cutting of solid small
and average cross-sections or pipes, in laminated mild steel and
grey iron or general metal.
POSITIVE RAKE TOOTH: 9° - 10° positive rake and constant pitch.
positive
The best combination of these two parameters can be seen directly
examining the chips.
Long spiral-shaped chips indicate ideal cutting.
Particular use for crosswise or inclined cuts in solid sections or large
pipes, but above all harder materials (highly alloyed and stainless
steels, special bronze and forge pig).
Very fine or pulverized chips indicate lack of
feed and/or cutting pressure.
COMBO TOOTH: pitch varies between teeth and consequently varying teeth size and varying gullet depths. Pitch varies between teeth
which ensures a smoother, quieter cut and longer blade life owing to
the lack of vibration.
Another advantage offered in the use of this type of blade in the fact
that with an only blade it is possible to cut a wide range of different
Thick and/or blue chips indicate overload of
the blade.
distance between teeth
9.5 - Blade running-in
materials in size and type.
When cutting for the first time, it is good practice to run in the
tool making a series of cuts at a low advance speed
(= 30-35 cm2/min on material of average dimensions with respect
to the cutting capacity and solid section of normal steel with R =
410-510 N/mm2), generously spraying the cutting area with lubricating coolant.
COMBO TOOTH: 9° - 10° positive rake.
positive
9.6 - Blade structure
Bi-metal blades are the most commonly used. They consist in a silicon-steel blade backing with electron beam or laser welded high speed
steel (HHS) cutting edge. The type of stocks are classified in M2,
M42, M51 and differ from each other because of their major hardness due to the increasing percentage of Cobalt (Co) and molybdenum (Mo) contained in the metal alloy.
This type of blade is the most suitable for the cutting of section bars
and large and thick pipes as well as for the cutting of solid bars at
maximum machine capacity. Available pitches: 3-4/4-6.
15
SAR 331 SA GDS
the cutting of pipes and thin section bars (from 1 to 3 mm).
Set
Saw teeth bent out of the plane of the saw body, resulting in a wide
cut in the workpiece.
REGULAR OR RAKER SET: Cutting teeth right and left, alternated
by a straight tooth.
Of general use for materials with dimensions superior to 5 mm. Used
for the cutting of steel, castings and hard nonferrous materials.
WAVY SET: Set in smooth waves.
ALTERNATE SET (IN GROUPS): Groups of cutting teeth right and
left, alternated by a straight tooth.
This set is associated with very fine teeth and it is used for extremely
thin materials (less than 1 mm).
ALTERNATE SET (INDIVIDUAL TEETH): Cutting teeth right and left.
This set is used for the cutting of nonferrous soft materials, plastics
and wood.
This set is associated with very fine teeth and it is mainly used for
9.7.1 - RECOMMENDED CUTTING PARAMETERS
STEEL
16
CUTTING SPEED
LUBRICATION
CONSTRUCTION
60/80
EMULSIFIABLE OIL
CEMENTATION
40/50
EMULSIFIABLE OIL
CARBON STEEL
40/60
EMULSIFIABLE OIL
HARDENING AND TEMPERING
40/50
EMULSIFIABLE OIL
BEARINGS
40/60
EMULSIFIABLE OIL
SPRINGS
40/60
EMULSIFIABLE OIL
FOR TOOLS
30/40
EMULSIFIABLE OIL
FOR VALVES
35/50
EMULSIFIABLE OIL
STAINLESS STEEL
30/40
EMULSIFIABLE OIL
SPHEROIDAL GRAPHITE
20/40
EMULSIFIABLE OIL
CAST IRON
40/60
EMULSIFIABLE OIL
ALUMINIUM
80/600
KEROSENE
BRONZE
70/120
EMULSIFIABLE OIL
HARD BRONZE
30/60
EMULSIFIABLE OIL
BRASS
70/350
EMULSIFIABLE OIL
COPPER
50/720
EMULSIFIABLE OIL
SAR 331 SA GDS
10
MACHINE COMPONENTS
10.1 - List of spare parts
REFERENCE NUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
DENOMINATION
REFERENCE NUMBER
DENOMINATION
Bedframe
Electric box
Electric box cover
Revolving arm lock lever
Arm lock bush
Machine hoisting hook
Crucible
Hydraulic unit cover
Cover
Refrigeranting liquid tank
Electropump
Bar stop body
Bar stop push rod
Bar stop rod
Revolving arm pin
Vice support
Revolving arm
Bearing 32008 X
Bushing
Screw
Hinge pin protection
Bearing 32008 X
Spacer
Hinge pin
Ring nut Guk M 40 x 1,5
Countervice r.h. jaw
Countervice l.h. jaw
Interchangeable plate
Countervice
Countervice anterior guard
Hinge pin support
60
61
62
63
64
65
66
67
Saw frame
Electric motor
Speed variator
Speed variator handwheel
Ring nut M 35 x 1,5
Speed reducer
Spacer
Cylinder sawframe superior
attacchment
Spacer flange
Vice support
Rack
Rack support
Vice
Vice screw
Vice handwheel
Pin
Pawl
Vice jaw
Ring NILOS 32008 XAV
spring support
Spring
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
Microswith
Cylinder sawframe inferior
attacchment
Pin
Pin
Hydraulic cylinder
( SA GDS version )
Adjustable screw
Transmission flywheel pin
Ring nut Guk M 30 x 1,5
Blade tightening slide
Microswitch
Microswitch support plate
Handgripp
Blade tightening handwheel
pin
Blade tightening
handwheel
Blade tightening pin
Spring
Bracket
Ring NILOS 32006 XAV
Bearing 32006 X
Transmission flywheel
Ring nut Guk M 30 x 1,5
Bearing 6308 2RS
Ring NILOS 6308 AV
Bearing guard
Motor flywheel shaft
Motor flywheel
Cone clamping EURONIC
CN 54/S
Blade guide protection
Microswitch
R.h. flywheel protection
L.h. flywheel protection
Blade guide arm guide
Blade guide arm
Hand lever
17
SAR 331 SA GDS
REFERENCE NUMBER
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
18
DENOMINATION
Additional protection
Fixed blade guide block
Blade cleaning brush
Brush support
Bearing 626
Bush
Short eccentric pin
Long eccentric pin
bearing 608 2RS
ring seeger
Upper blade guide pad
Side blade guide pad
Crucible
Coupling
Coupling
Cooling liquid cock
Flexible tube
Cooling distributor
Coupling
Bracke cylinder
( GDS version )
40
39
36
38
41
37
3
33
35
30
29
28
34
25
2
27
24
23
1
16
26
43
22
4
17
46
47
5
15
14
31
44
45
6
18
43
13
20
12
19
6
21
7
10
11
8
9
7
SAR 331 SA GDS
19
20
61
63
130
ZOOM - 3
123
74
126
64
121
67
123
125
122
71
75
126
111
66
76
77
124
ZOOM 4
68
73
121
60
62
65
91
70
92
110
93
109
108
95
78
79
94
101
80
106
81
86
84
85
96
119
107
99
104
87
82
83
120
98
72
102
88
89
88
90
114
87
113
117
97
113
117
100
115
114
116
118
ZOOM 2
118
116
ZOOM 1
SAR 331 SA GDS
115
SAR 331 SA GDS
407
KEY:
401
402
403
404
405
406
407
408
Main switch
Frame movement selector
Emergency pushbutton
SAR
408
START
406
1
401
Frame lowering regulator
Line pushbutton
Cycle start pushbutton
Indicator light
405
402
403
418
KEY:
411
412
413
414
415
416
417
418
Fuse holders (FU 1)
Fuse holders (FU 2)
Fuse holders (FU 3)
Relay
Hyd. switchboard motor teleswitch
Belt motor circuit breaker
Belt motor teleswitch
Transformer
417
411
412 413 414
416
415
KEY:
421
422
423
424
Hyd. switchboard motor
Solenoid valve
Hyd. switchboard casing
Regulator
421
422
423
424
21
SAR 331 SA GDS
11
ELECTRIC DIAGRAM
THOMAS
THOMAS
11.1 - Three-phase electric diagram
QS1
FU1
KM1
KM2
FR2
22
Main switch
Fuse cartridge
Central motor control switch id.
Motor belt control switch
Thermal motor belt
M1
M2
M3
FU2
TC1
Motor gear case id.
Belt motor
Motor pump
Fuse cartridge
Transformer
THOMAS
THOMAS
SAR 331 SA GDS
FU3
SB1
SB2
KA
HL
Fuse cartridge
Emergency switch
On-line switch
Relay
Pilot light
SQ1
SA1
EF
SQ2
SQ3
Dip-switch
Arch selector
RC coil
Dip-switch
Dip-switch
23
SAR 331 SA GDS
01
02
03
04
05
06
24
Sawframe downfeed regulator
Sawframe lifting speed regulator
Valve
Electric valve
Valve
Valve
SAR 331 SA GDS
12 TROUBLESHOOTING
This chapter lists the probable faults and malfunctions that could occur while the machine is being used and suggests possible remedies for
solving them.
The first paragraph provides diagnosis for TOOLS and CUTS, the second for ELECTRICAL COMPONENTS.
12.1 - Blade and cut diagnosis
FAULT
PROBABLE CAUSE
REMEDY
TOOTH BREAKAGE
Too fast advance
Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.
Change speed and/or type of blade.
See chapter on “Material classification and
blade selection”, in the section Blade selection table according to cutting and feed
speed.
Wrong cutting speed
Wrong tooth pitch
Choose a suitable blade. See Chapter “Material classification and blade selection”.
Chips sticking onto teeth and in the gullets or material that gums
Check for clogging of cooling liquid drain
holes on the blade-guide pads and that flow
is plentiful in order to facilitate the removal
of chips from the blade.
Defects on the material or material too
hard
Material surfaces can be oxidised or covered
with impurities making them, at the beginning of the cut, harder that the blade itself,
or have hardened areas or inclusions inside
the section due to productive agents used
such as casting sand, welding wastes, etc.
Avoid cutting these materials or in any case
perform cutting with extreme care, cleaning and removing such impurities as quickly
as possible.
Check the gripping of the part.
Ineffective gripping of the part in the vice
The blade gets stuck in the material
Starting cut on sharp or irregular section bars
Poor quality blade
Previously broken tooth left in the cut
Cutting resumed on a groove made previously
Vibrations
Reduce feed and exert less cutting pressure.
Pay more attention when you start cutting.
Use a superior quality blade.
Accurately remove all the parts left in.
Make the cut elsewhere, turning the part.
Check gripping of the part.
Wrong tooth pitch or shape
Replace blade with a more suitable one.
See “Material classification and blade
selection” in the Blade Types section.
Adjust blade guide pads.
Insufficient lubricating refrigerant or
wrong emulsion
Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked.
Check the emulsion percentage.
Turn teeth in correct direction.
Teeth positioned in the direction opposite the cutting direction
25
SAR 331 SA GDS
FAULT
PROBABLE CAUSE
REMEDY
PREMATURE BLADE WEAR
Faulty running-in of blade
See “Material classification and blade selection” in the Blade running-in section.
Turn teeth in correct direction.
Teeth positioned in the direction opposite the cutting direction
Poor quality blade
Too fast advance
Wrong cutting speed
Defects on the material or material too
hard
Insufficient lubricating refrigerant or
wrong emulsion
Faulty welding of blade
BLADE BREAKAGE
Too fast advance
Wrong cutting speed
Wrong tooth pitch
Ineffective gripping of the part in the vice
Blade touching material at beginning of
cut
26
Use a superior quality blade.
Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.
Change speed and/or type of blade.
See chapter on “Material classification and
blade selection”, in the section Blade selection table according to cutting and feed
speed.
Material surfaces can be oxidised or covered
with impurities making them, at the beginning of the cut, harder that the blade itself,
or have hardened areas or inclusions inside
the section due to productive agents used
such as casting sand, welding wastes, etc.
Avoid cutting these materials or in any case
perform cutting with extreme care, cleaning and removing such impurities as quickly
as possible.
Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked.
Check the emulsion percentage.
The welding of the blade is of utmost importance. The meeting surfaces must perfectly
match and once they are welded they must
have no inclusions or bubbles; the welded
part must be perfectly smooth and even.
They must be evenly thick and have no bulges
that can cause dents or instant breakage
when sliding between the blade guide pads.
Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.
Change speed and/or type of blade.
See chapter on “Material classification and
blade selection”, in the section Blade selection table according to cutting and feed
speed.
Choose a suitable blade. See Chapter “Material classification and blade selection”.
Check the gripping of the part.
At the beginning of the cutting process,
never lower the saw frame before starting
the blade motor.
SAR 331 SA GDS
FAULT
PROBABLE CAUSE
REMEDY
Blade guide pads not regulated or dirty
because of lack of maintenance
Check distance between blocks (see “Machine adjustments” in the Blade Guide
Blocks section): extremely accurate guiding
may cause cracks and breakage of the tooth.
Clean carefully.
Blade guide block too far from material
to be cut
Approach head as near as possible to material to be cut so that only the blade section
employed in the cut is free, this will prevent
deflections that would excessively stress the
blade.
The back of blade rubs against the support
due to deformed or poorly welded bands (tapered), causing cracks and swelling of the
back contour.
Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked. Check the emulsion percentage.
Improper position of blade on flywheels
Insufficient lubricating refrigerant or
wrong emulsion
STREAKED OR ETCHED BANDS
Damaged or chipped blade guide
pad
Tight or slackened blade guide bearing
CUTS OFF THE STRAIGHT
Blade not parallel as to the counter-vice
Blade not perpendicular due to the excessive play between the guide pads
and maladjustment of the blocks
Too fast advance
Blade guide block too far from material
to be cut
Worn out blade
Wrong tooth pitch
Replace it.
Adjust it (see Chapter “Machine adjustments” in Blade guide section).
Check fastenings of the blade guide blocks
as to the counter-vice so that they are not
too loose and adjust blocks vertically; bring
into line the position of the degrees and if
necessary adjust the stop screws of the
degree cuts.
Check and vertically re-adjust the blade guide
blocks; reset proper side guide play (see
Chapter “Machine adjustments” in Blade
guide section).
Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.
Approach it as near as possible to material
to be cut so that only the blade section employed in the cut is free, this will prevent deflections that would excessively stress the
blade.
Replace it.
Blade with major density of teeth is being
used, try using one with less teeth (see Chapter “Material classification and blade selection” in the Blade Types section).
27
SAR 331 SA GDS
FAULT
PROBABLE CAUSE
REMEDY
Broken teeth
Irregular work of the blade due to the lack of
teeth can cause deflection in the cut; check
blade and if necessary replace it.
Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked.
Check the emulsion percentage.
Insufficient lubricating refrigerant or
wrong emulsion
FAULTY CUT
Worn out flywheels
Flywheel housing full of chips
STREAKED CUTTING SURFACE
Too fast advance
Poor quality blade
Worn out blade or with chipped and/or
broken teeth
Wrong tooth pitch
Blade guide block too far from material
to be cut
NOISE ON GUIDE BLOCKS
Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.
Use a superior quality blade.
Replace it.
Blade used probably has too large teeth; use
one with more teeth (see “Material classification and blade selection” in the Blade
Types section).
Approach it as near as possible to material
to be cut so that only the blade section employed in the cut is free, this will prevent deflections that would excessively stress the
blade.
Insufficient lubricating refrigerant or
wrong emulsion
Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked.
Check the emulsion percentage.
Chipped bearings
Dirt and/or chips between blade and guide
bearings. Replace them.
Replace them.
Worn out or damaged pads
28
The support and guide flange of the band
are so worn out that they cannot ensure
the alignment of the blade, causing faulty
cutting; blade rolling and drawing tracks can
have become tapered. Replace them.
Clean with compressed air.
SAR 331 SA GDS
12.2 - Electrical components diagnosis
FAULT
PROBABLE CAUSE
REMEDY
MACHINE DOES NOT WORK
Power supply
Check:
Main disconnect switch
Fuses " FU 1 "
" SQ 1 " safety microswitch
Blade tightening microswitch
Emergency button " SB 1 " on
Cycle reset or line button " SB 2 "
Thermal relay of main motor
Transformer " TC 1 "
Fuse " FU 2 - FU 3 "
MOTOR STOPPED WITH PILOT LIGHT
“HL” LIT
Check that the supply voltage is the same
as the line voltage and that it gives a value of
24 V at output.
Check fuse efficiency and ensure there are
no short circuits causing the protection on
the control side of the circuit.
Microswitch " SQ 2 "
After having raised the saw frame, check
that the microswitch is not engaged and if
necessary check operating efficiency.
Remote-control switch " KM "
Check that phases are present at both input and output; ensure that it is not blocked,
that it closes when fed, that it does not cause
short circuits; otherwise change it.
Check that it is not burnt and that it turns
freely.
It may be rewound or changed.
Motor " M 1 "
13
- phases
- cables
- socket
- plug
Voltage must arrive upstream from the fuses
(terminal board).
It must be turned to ON position.
Check electrical efficiency. Check power line
connections and relative terminals.
Check electrical efficiency and check for
shorts that trigger these protections on the
power side of the circuit.
Check closing of the flywheel guard. Check
the efficiency of the device; replace it if damaged.
Make sure to have tightened the blade with
the relevant handwheel and to have actuated
the microswitch.
Ensure that it is off and that its contacts are
unbroken.
Check mechanical efficiency; replace if damaged.
Check that thermal relay protecting main
motor is correctly connected.
NOISE TESTS
In accordance with point 1.7.4.f of the Machines Directive EEC 89/392
2 measurements with the machine operating unloaded.
- The microphone was been located close to the operator's head, at medium height.
- The weighted equivalent continuous acoustic pressure level was 66,1 dB (A).
- The maximum level of the WEIGHTED instantaneous acoustic pressure C was always less than 130 dB.
NOTE: with the machine operating, the noise level will vary according to the different materials being processed. The user must there-fore
assess the intensity and if necessary provide the operators with the necessary personal protection, as required by Law 277/1991.
29
SAR 331 SA GDS
PLATES AND LABELS
30
SAR 331 SA GDS
31
THOMAS S.p.A. - Via Pasubio, 32 - 36033 Isola Vicentina (VI) - Telephone 0444 / 97.61.05 - Fax 0444 / 97.69.34
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