USER`S MANUAL - Leeson Electric Corporation

USER`S MANUAL - Leeson Electric Corporation
USER’S MANUAL
M1740009.OO
Pulse-Width Modulated, Adjustable Speed
Drives for DC Brush Motors
LIMITED WARRANTY
A. Warranty - LEESON Electric warrants that its products will be free from defects in
material and workmanship for a period of one (1) year from the date of shipment
thereof. Within the warranty period, LEESON will repair or replace such products that
are returned to LEESON or to the nearest Branch Office, with shipping charges
prepaid. At our option, all return shipments are F.O.B. LEESON or its Branch Office.
This warranty shall not apply to any product that has been subject to misuse,
negligence, or accident; or misapplied; or repaired by unauthorized persons; or
improperly installed. LEESON is not responsible for removal, installation, or any other
incidental expenses incurred in shipping the product to or from the repair point.
B. Disclaimer - The provisions of Paragraph A are LEESON’s sole obligation and
exclude all other warranties of MERCHANTABILITY or use, express or implied.
LEESON further disclaims any responsibility whatsoever to the customer or any other
persons for injury to person or damage or loss of property of value caused by any
product that has been subject to misuse, negligence, or accident, or misapplied or
modified by unauthorized persons or improperly installed.
C. Limitations of Liability - In the event of any claim or breach of any of LEESON’s
obligations, whether expressed or implied, and particularly of any claim of a breach of
warranty claimed in Paragraph A, or of any other warranties, express, or implied, or
claim of liability that might, despite Paragraph B, be decided against us by any lawful
authority, LEESON shall under no circumstances be liable for any consequential
damages, losses, or expense arising in connection with the use of, or inability to use,
LEESON’s product for any purpose whatsoever. An adjustment made to the warranty
does not void the warranty, nor does it imply an extension of the original one (1) year
warranty period. Product serviced and/or parts replaced by a no-charge basis during
the warranty period carry the unexpired portion of the original warranty only.
If for any reason any of the forgoing provisions shall be ineffective, LEESON’s liability
for damages arising out of its manufacture or sale if equipment, or use thereof, whether
such liability is based on warranty, contract, negligence, strict liability in tort, or
otherwise, shall not in any event exceed the full purchase of such equipment.
Any action against LEESON based upon any liability or obligation arising hereunder or
under any law applicable to the sale of equipment or the use thereof must be
commenced within one year after the cause of such action arises.
i
Safety Warnings
• This symbol  denotes an important safety tip or
SHOCK
HAZARD
AVOID
HEAT
KEE
DR
OID
ATION
warning. Please read these instructions carefully
before performing any of the procedures contained in
this manual.
•
Have a qualified electrical maintenance technician install,
adjust, and service this equipment. Follow the National
Electrical Code and all other applicable electrical and
safety codes, including the provisions of the Occupational
Safety and Health Act (OSHA), when installing
equipment.
•
Reduce the chance of an electrical fire, shock, or
explosion by proper grounding, over-current protection,
thermal protection, and enclosure. Follow sound
maintenance procedures.

It is possible for a drive to run at full speed as a result
of a component failure. LEESON strongly recommends
the installation of a master switch in the main power input to
stop the drive in an emergency.
This drive is not isolated from earth ground. Circuit
potentials are at 115 VAC above earth ground. Avoid direct
contact with the printed circuit board or with circuit elements
to prevent the risk of serious injury or fatality. Use a nonmetallic screwdriver for adjusting the calibration trimpots.
ii
Contents
Safety Warnings
i
Specifications
1
Dimensions
2
Installation
3
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Line fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Speed adjust potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Quick-connect terminal block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Voltage follower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Operation
10
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Line starting and stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Inhibit switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Dynamic braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Calibration
14
Maximum Speed (MAX SPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Minimum Speed (MIN SPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Regulation (IR COMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
TORQUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Contents
iii
Application Notes
17
Multiple fixed speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Adjustable speeds using potentiometers in series . . . . . . . . . . . . . . . . . . . . .18
Independent adjustable speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
RUN/JOG Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Reversing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Troubleshooting
22
Before troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Block Diagrams
25
iv
Illustrations
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
1. M1740009.00 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2. Fuseholder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3. Speed Adjust Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4. Quick-Connect Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5. Drive Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
6. Voltage Follower Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
7. Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
8. Inhibit Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
9. Dynamic Brake Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
10. Typical TORQUE and IR COMP Settings
(actual settings may vary with each application) . . . . . . . . . . . . . . . . . . . . . . . . . . .16
11. Multiple Fixed Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
12. Adjustable Fixed Speeds Using Potentiometers in Series . . . . . . . . . . . . . . . . . . . .18
13. Independent Adjustable Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
14. RUN/JOG Switch Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
15. Reversing Circuit Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
16. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
17. Input Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
1
Specifications
Model
M1740009.00
AC Line Voltage
115 VAC, ±10%, 50/60 Hz, single phase
Horsepower Range (with 130 VDC motors)
1/20 - 1/3 HP
Armature Voltage
0 - 130 VDC
Maximum Continuous Armature Current
2 ADC
Form Factor (at base speed)
1.05
Acceleration Time (with load)
1 second
Deceleration Time (with load)
2 seconds
Analog Input Voltage Range
(isolated; S1 to S2)
0 - 5 VDC
Input Impedance (S1 to S2)
> 100K ohms
Speed Regulation
1% of base speed or better
Ambient Temperature Range
10°C - 40°C
Weight
0.6 lbs
2
Dimensions
BR501
D501
Q501
A
G
S
TH501
K
0.19 [5]
C502
3.58 [91]
1.75 [44]
FU501
R502
C501
R503
MAX SPD
P501
R501
0.65 [16]
TORQUE
P502
SO501
P503
0.74 [19]
IL501
PWR
IL502
CUR
LIM
P504
NEG
NEG
MIN SPD
IR COMP
3.80 [97]
4.30 [109]
0.19 [5]
2.15 [55]
1.28 [33]
0.97 [25]
Figure 1. M1740009.00 Dimensions
3
Installation
Mounting
•
Protect the drive from dirt, moisture, and accidental
contact.
•
Provide sufficient room for access to the terminal block
and calibration trimpots.
•
Mount the drive away from heat sources. Operate the
drive within the specified ambient operating temperature
range.
•
Prevent loose connections by avoiding excessive
vibration of the drive.
•
Mount drive with its board in either a horizontal or vertical
plane. Six 0.19 in. (5 mm) wide slots in the chassis
accept #8 pan head screws. Fasten either the large
base or the narrow flange of the chassis to the subplate.
•
The chassis must be earth grounded. Use a star washer
beneath the head of at least one of the mounting screws
to penetrate the anodized chassis surface and reach
bare metal.
4
Installation
Wiring
•
Use 18 AWG wire for speed adjust potentiometer wiring.
Use 16 AWG wire for motor and AC line voltage wiring.
•
Twist logic wires (for speed adjust potentiometer and
inhibit) to avoid picking up unwanted elertrical noise. Use
shielded cable if wires are longer than 18 in. (46 cm).
•
Keep logic wires away from power carrying lines or
sources of electrical noise that can cause erratic
operation. Never run speed adjust potentiometer or
inhibit wires in the same conduit as the motor and AC line
voltage wires.
•
It may be necessary to earth ground the shielded cable.
If noise is produced by devices other than the drive,
ground the shield at the drive end. If noise is generated
by a device on the drive, ground the shield at the end
away from the drive. Do not ground both ends of the
shield.
Installation
5
Line fuse
The M1740009.00 drive is protected by a 5A, 250V AC line
fuse. The fuse does not have to be resized as long as the
motor used is within the drive’s specified horsepower range.
The fuse is mounted in the fuseholder (see Figure 2). To
replace a blown fuse, use a screwdriver to turn the
fuseholder knob counterclockwise. Remove the blown fuse
and replace with a new fuse.
FUSE
HOLDER
KNOB
Figure 2. Fuseholder
6
Installation
Speed adjust potentiometer
Mount the speed adjust potentiometer through a 0.38 in.
(10 mm) hole with the hardware provided (see Figure 3).
Install the circular insulating disk between the panel and the
10K ohm speed adjust potentiometer. Twist the speed
adjust potentiometer wire to avoid picking up unwanted
electrical noise. If the potentiometer leads are longer than
18 in. (457 mm), use shielded cable (see Wiring section).
 Warning
Be sure that the potentiometer tabs do not make
contact with the potentiometer enclosure. Grounding
the input will cause damage to the drive.
MOUNT THROUGH A 0.38 IN. (10 MM) HOLE
CW
WIPER
W
NUT
STAR
WASHER
SPEED ADJUST
POTENTIOMETER
INSULATING DISK
PANEL
Figure 3. Speed Adjust Potentiometer
Installation
7
Quick-connect terminal block
The quick-connect terminal block has an 8-pin header block
and 8-screw terminal plug (Figure 4). To use the quickconnect terminal block:
1. Carefully pull the terminal plug from the header block.
2. With a small flat-head screwdriver, turn the terminal plug
screw counterclockwise to open the wire clamp.
3. Insert a stripped wire into the large opening in front of
the plug.
4. Turn the terminal plug screw clockwise to clamp the
wire.
5. Repeat steps 2 through 4 for each terminal until all
connections are made.
6. Insert the plug into the header until securely fastened.
TERMINAL
PLUG
HEADER
BLOCK
Figure 4. Quick-Connect Terminal Block
8
Installation
Connections
L1
L2
A1
A2
S3
S2
H2
S1
CW
10K
SPD ADJ
POT
LINE VOLTAGE
115 VAC
H1
RUN
STOP
INHIBIT SWITCH
(optional)
MOTOR
Figure 5. Drive Connections
Assumptions: This drive series supplies motor voltage
from its A1 and A2 terminals. It is assumed throughout this
manual that when A1 is positive with respect to A2, the
motor will rotate clockwise (CW) while looking at the output
shaft protuding from the front of the motor. If this is
opposite of the desired rotation, simply reverse the wiring to
the motor from A1 and A2.
Installation
9
Voltage follower
Instead of using a speed adjust potentiometer, the drive
may be wired to follow a 0 - 5 VDC voltage signal that is
isolated from earth ground (Figure 6). Connect the signal
input (+) to S2. Connect the signal common (-) to S1.
Make no connection to S3. A potentiometer can be used to
scale the analog input voltage.
L1
L2
A1
A2
S3
S2
H2
S1
+
-
H1
0 - 5 VDC
ISOLATED VOLTAGE
SIGNAL INPUT
Figure 6. Voltage Follower Connections
10
Operation
Startup
Note: Before applying power, verify that no conductive
material is placed on the printed circuit board.
To start the drive:
1. Turn the speed adjust potentiometer full
counterclockwise (CCW). If the drive is following a
voltage signal, set the voltage signal to 0 VDC.
2. Apply power.
3. Slowly advance the speed adjust potentiometer
clockwise (CW). If the drive is following a voltage signal,
slowly increase the voltage signal. The motor will slowly
accelerate as the speed adjust potentiometer is turned
CW, or the voltage signal is increased. Increase the
signal until the desired speed is reached.
4. Remove power from the drive. The motor will coast to a
stop.
If the motor or drive does not perform as described,
disconnect the AC line voltage immediately. Refer to the
Troubleshooting section, page 22, for further assistance.
Operation
Diagnostic LEDs
This drive is equipped with two diagnostic LEDs: power
status (PWR) and current limit mode (CUR LIM). See
Figure 7 for LED locations.
POWER (PWR): Green LED lights whenever AC line
voltage is applied to the drive.
CURRENT LIMIT (CUR LIM): Red LED lights whenever
the drive reaches current limit.
POWER
LED
Figure 7. Diagnostic LEDs
CURRENT
LIMIT LED
11
12
Operation
Line starting and stopping
Line starting and stopping (applying and removing AC line
voltage) is recommended for infrequent starting and
stopping of a drive only. When AC line voltage is applied to
the drive, the motor accelerates to the speed set by the
speed adjust potentiometer. When AC line voltage is
removed, the motor coasts to a stop.
Inhibit switch
An inhibit switch allows the motor to decelerate to zero
speed when the switch is closed. Connect a single pole,
single throw switch between H1 and H2 (see Figure 8,
Page 13). Close the switch to decelerate the motor to zero
speed. Open the switch to accelerate the motor to set
speed. An isolated NPN open-collector transistor rated for
at least 10 mA (ICE) may also be used as an inhibit switch.
Wire the collector to H1, and the emitter to H2.
Dynamic braking
Dynamic braking may be
used to rapidly stop a
motor (Figure 9, page 13).
For the RUN/BRAKE
switch, use a double pole,
double throw switch rated
for at least the maximum
DC armature voltage and
maximum braking current.
 Warning
Wait for the motor to
completely stop before
switching it back to
RUN. This will prevent
high armature currents
from damaging the
motor or drive.
Operation
13
INHIBIT SWITCH
(optional)
STOP
RUN
Figure 8. Inhibit Switch
A2
MOTOR
RUN
A1
H2
H1
BRAKE
1 OHM 1 W
BRAKE
RESISTOR
A 1 Ohm, 1 W resistor
is used as the dynamic
brake resistor. For
motors rated 1/17
horsepower and lower,
a dynamic brake
resistor is not
necessary since the
armature resistance is
high enough to stop
the motor without
demagnetization. In
this case, replace the
dynamic brake resistor
with 12 gauge wire.
Figure 9. Dynamic Brake Connection
14
Calibration
Each drive is factory calibrated to its maximum current rating.
Re-adjust the calibration trimpot settings to accomodate
lower current motors.
All adjustments increase with CW rotation, and decrease with
CCW rotation. Use a non-metallic screwdriver for calibration.
Each trimpot is identified on the printed circuit board.
Minimum Speed (MIN SPD)
The MIN SPD setting determines the motor speed when the
speed adjust potentiometer is turned full CCW. It is factory
set for zero speed.
To calibrate, turn the speed adjust potentiometer full CCW.
Adjust the MIN SPD trimpot until the motor has stopped, or
is running at the desired minimum speed.
Maximum Speed (MAX SPD)
The MAX SPD setting determines the motor speed when
the speed adjust potentiometer is turned full CW. It is
factory set for maximum rated speed.
To calibrate, set the MAX SPD trimpot full CCW. Turn the
speed adjust potentiometer full CW. Adjust the MAX SPD
trimpot until the desired maximum motor speed is reached.
NOTE: Check the MIN SPD and MAX SPD adjustments after
recalibrating to verify that the motor runs at the desired
minimum and maximum speeds.
Calibration
15
Regulation (IR COMP)
The IR COMP setting determines the degree to which motor
speed is held constant as the motor load changes. It is
factory calibrated for a 1/8 HP, 90 VDC motor.
Recalibrate the IR COMP setting when using a lower
current motor. Refer to the recommended IR COMP
settings in Figure 10, or recalibrate using the following
procedure:
If the motor does not maintain set speed as the load
changes, gradually rotate the IR COMP trimpot CW. If the
motor oscillates (overcompensation), the IR COMP trimpot
may be set too high (CW). Turn the IR COMP trimpot CCW
to stabilize the drive.
TORQUE
The TORQUE setting determines the maximum armature
current output of the drive. It is factory calibrated for a 1/8
HP, 90 VDC motor.
Recalibrate the TORQUE setting when using a lower
current motor. Refer to the recommended TORQUE
settings in Figure 10 (page 16) or recalibrate using the
following procedure:
1. With the power disconnected from the control, connect a
DC ammeter (0 - 15A minimum scale) in series with the
armature.
2. Set the TORQUE trimpot to minimum (full CCW).
16
Calibration
TORQUE (cont.)
3. Lock the motor armature. Be sure that the motor is firmly
mounted.
4. Connect power to the drive. The motor should remain
stopped.
5. Set the speed adjust potentiometer to maximum (full CW).
6. Adjust the TORQUE trimpot CW slowly until the armature
current is 120% of motor rated armature current.
7. Set the speed adjust potentiometer to minimum and
remove power from the drive.
8. Remove the stall from the motor.
TORQUE
TORQUE
TORQUE
IR COMP
1/4 HP
130 VDC
2500 RPM
1.40 ADC
IR COMP
1/8 HP
90 VDC
1800 RPM
1.30 ADC
IR COMP
1/8 HP
130 VDC
2500 RPM
1.00 ADC
TORQUE
TORQUE
TORQUE
IR COMP
1/10 HP
90 VDC
1725 RPM
1.10 ADC
IR COMP
1/15 HP
90 VDC
1800 RPM
0.75 ADC
IR COMP
1/20 HP
90 VDC
1750 RPM
0.56 ADC
Figure 10. Typical TORQUE and IR COMP Settings
(actual settings may vary with each application)
17
Application Notes
Multiple fixed speeds
Replace the speed adjust potentiometer with series
resistors with a total series resistance of 10K ohms
(Figure 11). Add a single pole, multi-position switch with the
correct number of positions for the desired number of fixed
speeds.
R1
S3
R2
S2
R3
S1
TOTAL SERIES
RESISTANCE
10K OHMS
R4
Figure 11. Multiple Fixed Speeds
18
Application Notes
Adjustable speeds using potentiometers in series
Replace the speed adjust potentiometer with a single pole,
multi-position switch, and two or more potentiometers in
series, with a total series resistance of 10K ohms. Figure
12 shows a connection for fixed high and low speed adjust
potentiometers.
CW
S3
HIGH
SPEED
5K
OHM
LOW
SPEED
CW
S2
S1
5K
OHM
Figure 12. Adjustable Fixed Speeds Using
Potentiometers in Series
Application Notes
19
Independent adjustable speeds
Replace the speed adjust potentiometer with a single pole,
multi-position switch, and two or more potentiometers in
parallel, with a total parallel resistance of 10K ohms. Figure
13 shows the connection of two independent speed adjust
potentiometers that can be mounted at two separate
operating stations.
S3
SPEED 2
CW
CW
SPEED 1
20K
OHM
20K
OHM
S2
S1
Figure 13. Independent Adjustable Speeds
20
Application Notes
RUN/JOG S witch
Using a RUN/JOG switch is recommended in applications
where quick stopping is not needed and frequent jogging is
required. Use a single pole, single throw switch for the
RUN/JOG switch, and a single pole, normally closed,
momentary operated pushbutton for the JOG pushbutton
(see Figure 14). When the RUN/JOG switch is set to JOG,
the motor decelerates to zero speed. Press the JOG
pushbutton to jog the motor. Return the RUN/JOG switch
to RUN for normal operation.
cw
10K ohm
Speed Pot
RUN
JOG
JOG
PUSHBUTTON
Figure 14. RUN/JOG Switch Connection
Application Notes
21
Reversing
A dynamic brake may be used when reversing the motor
direction (Figure 15). Use a three pole, three position
switch rated for at least the maximum DC armature voltage
and maximum braking current. Wait for the motor to stop
completely before switching it to either the forward or
reverse direction.
A2
FORWARD
BRAKE
REVERSE
MOTOR
1 Ohm 1 W
Dynamic
Brake Resistor
A1
H2
H1
Figure 15. Reversing Circuit Connection
22
Troubleshooting
 Warning
Dangerous voltages exist on the drive when it is
powered. When possible, disconnect the AC line
voltage from the drive while troubleshooting. Be alert.
High voltages can cause serious or fatal injury.
Before troubleshooting
Perform the following steps before starting any procedure in
this section:
1. Disconnect AC line voltage from the drive.
2. Check the drive closely for damaged components.
3. Check that no conductive or other foreign material has
become lodged on the printed circuit board.
4. Verify that every connection is correct and in good
condition.
5. Verify that there are no short circuits or grounded
connections.
6. Check that the drive’s rated armature output is
consistent with the motor ratings.
Troubleshooting
23
Motor does not run
1. Check for blown fuses or tripped circuit breaker.
2. Verify that the speed adjust potentiometer is not set to zero
speed position.
3. Verify that the inhibit terminals (H1 and H2) are not shorted
together.
4. Verify that the drive is receiving AC line voltage.
5. Check that the drive is not in current limit. The red current limit
(CUR LIM) LED must be off. If the red current limit LED is on,
verify that the motor is not jammed. It may be necessary to
increase the TORQUE setting if it is set to a value lower than
the current rating of the motor.
Fuses or circuit breaker blows
1. Check all wiring for shorts, grounds, or misconnections.
2. Check that the drive is configured to match the motor rating.
3. Check that the motor is not jammed or restricted from
movement.
4. Check that the fuse size is correct for the motor being driven.
Motor runs too fast at the maximum speed setting
1. Check that the MIN SPD and MAX SPD setting are not set too
high.
24
Troubleshooting
Motor will not stop when the speed adjust potentiometer is full
counterclockwise
1. Turn the MIN SPD trimpot CCW until the motor stops.
Motor runs in the opposite direction
1. Remove AC line voltage.
2. Reverse connections to the motor armature.
Motor slows under load
1. Check that the drive has been correctly calibrated for the motor.
2. Check that the motor is not overloaded.
3. Re-adjust the IR COMP slightly CW until the motor runs at
proper speed.
Motor is unstable under load
1. Re-adjust the IR COMP setting slightly CCW until motor speed
is stabliized.
Motor only runs at full speed
1. Check that S2 and S3 are not shorted together.
For additional assistance, contact your local LEESON distributor, or
the factory direct: (262) 377-8810 FAX: (262) 377-9025
25
Block Diagrams
S3 (H1)
S2
MAX/MIN
SPEED
CIRCUIT
S1 (H2)
PWM
CIRCUIT
+VBUS
IR COMP
CIRCUIT
POWER
BRIDGE
CIRCUIT
L1
L2
FU501
CURRENT
LIMIT
CIRCUIT
Figure 16. Block Diagram
POWER
SWITCHING
CIRCUIT
A1
A2
L2
L1
FU501
5A / 3AG
MOV1
S1 (H2)
S2
S3 (H1)
33K
D1
15V
.5W
P501
100K
R14
33K
MIN
SPD
CW MAX
SPD
3
TH501
R9
15K
R13 300K
P503
10K
C3
1/35
CW R15 330K
3
+5V
C4
R502
6.8K/10W
+
-
R16
330K
5
6
Figure 17. Input Circuit Diagram
BR501 GBU8J
C501
220/25
+15V
R8
R5 12K
8
V-
4
IC2
LM358N
V+
+15V
7
R7 330K
R12 330K
26
27
NOTES
28
NOTES
29
NOTES
DISCLAIMER
The information and technical data in this manual
are subject to change without notice. LEESON
Electric makes no warranty of any kind with
regard to this material, including, but not limited
to, the implied warranties of merchantability and
fitness for a particular purpose. LEESON Electric
assumes no responsibility for any errors that may
appear in this manual and makes no commitment
to update or to keep current the information in this
manual.
2100 Washington Street
Grafton, WI 53024-0241, U.S.A.
TEL: (262) 377-8810 FAX: (262) 377-9025
Document number 250–0256, Rev. 1
Printed in the U.S.A – August 2003
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