QSG-0023 rev 1
Calibration
Minimum Speed (MIN SPD):
The MIN SPD setting determines the minimum motor speed when the
speed adjust potentiometer is set for minimum speed. It is factory set for zero speed. To calibrate the
MIN SPD:
1. Set the MIN SPD trim pot full CCW.
2. Set the speed adjust potentiometer for minimum speed.
3. Adjust the MIN SPD trim pot until the desired minimum speed is reached or is just at the
3.
threshold of rotation.
Maximum Speed (MAX SPD):
The MAX SPD setting determines the maximum motor speed when the
speed adjust potentiometer is set for maximum speed. To calibrate the MAX SPD:
1. Set the MAX SPD trim pot full CCW.
2. Set the speed adjust potentiometer for maximum speed.
3. Adjust the MAX SPD trim pot until the desired maximum speed is reached.
Check the MIN SPD and MAX SPD adjustments after recalibrating to verify that the motor runs at the
desired minimum and maximum speed.
Torque (TORQ LIMIT):
The TORQ LIMIT setting determines the maximum torque for accelerating and
driving the motor. To calibrate the TORQ LIMIT:
1. With the power disconnected from the drive, connect a DC ammeter in series with the
1.
armature.
2. Set the TORQ LIMIT trim pot to minimum (full CCW).
3. Set the speed adjust potentiometer to maximum speed (full CW).
4. Carefully lock the motor armature. Be sure that the motor is firmly mounted.
5. Apply line power. The motor should be stopped.
6. Slowly adjust the TORQ LIMIT trim pot CW until the armature current is 150% of motor rated
6.
armature current.
Continuous operation beyond this rating may damage the motor.
7. Turn the speed adjust potentiometer CCW.
8. Remove line power.
9. Remove the stall from the motor.
10. Remove the ammeter in series with the motor armature if it is no longer needed.
IR Compensation (IR COMP):
The IR COMP setting determines the degree to which motor speed is
held constant as the motor load changes. To calibrate the IR COMP:
1. Set the IR COMP trim pot full CCW.
2. Increase the speed adjust potentiometer until the motor runs at midspeed without load. A
2.
handheld tachometer may be used to measure motor speed.
3. Load the motor armature to its full load armature current rating. The motor should slow down.
4. While keeping the load on the motor, rotate the IR COMP trim pot until the motor runs at the
4.
speed measured in step 2. If the motor oscillates (overcompensation), the IR COMP trim pot
4.
may be set too high (CW). Turn the IR COMP trim pot CCW to stabilize the motor.
5. Unload the motor.
Acceleration (ACCEL):
The ACCEL setting determines the time the motor takes to ramp to a higher
speed. ACCEL is factory set for the shortest acceleration time (full CCW). To calibrate the ACCEL:
1. Set the speed adjust potentiometer for minimum speed.
2. Set the speed adjust potentiometer for maximum speed. Measure the time is takes the motor
2.
to go from minimum speed to maximum speed.
3. If the time measured in step 2 is not the desired acceleration time, turn the ACCEL trim pot
3.
CW for a longer acceleration time, or CCW for a shorter acceleration time. Repeat steps 1
3.
through 3 until the acceleration time is correct.
Deceleration (DECEL):
The DECEL setting determines the time the motor takes to ramp to a lower
speed. DECEL is factory set for the shortest deceleration time (full CCW). To calibrate the DECEL:
1. Set the speed adjust potentiometer for maximum speed.
2. Set the speed adjust potentiometer for minimum speed. Measure the time is takes the motor
2.
to go from maximum speed to minimum speed.
3. If the time measured in step 2 is not the desired deceleration time, turn the DECEL trim pot
3.
CW for a longer deceleration time, or CCW for a shorter deceleration time. Repeat steps 1
3.
through 3 until the deceleration time is correct.
Jog (JOG):
The JOG setting determines the constant motor speed when the drive is set to Jog mode.
To calibrate the JOG:
1. Make sure the drive is in Jog mode. This is done by connecting the SPD IN and JOG terminals.
1.
See the Modes section for information about wiring in a Run / Jog switch.
2. Turn the JOG trim pot until the motor runs at the desired JOG speed.
Run Mode
Jumper terminals SPD and SPD IN if you want to control the motor speed using a speed adjust
potentiometer. The drive comes factory set for run mode.
Run / Jog Mode
To wire in a RUN/JOG switch, connect a single pole, double throw switch to terminals SPD, SPD IN, and
JOG. When the switch connects terminals SPD and SPD IN, the drive will run at a speed set by the
external speed adjust potentiometer. When the switch connects terminals JOG and SPD IN, the drive
will run at a speed set by the JOG trim pot.
MODES
MOTOR
A1
A2
FWD
BRAKE
REV
DYNAMIC
BRAKE
RESISTOR
INHIBIT
Reversing with a Dynamic Brake
A dynamic brake may be used when reversing the motor direction. Use a three pole, three position
switch rated for at least the armature voltage rating and 150% of the armature current rating. For the
dynamic brake resistor, use a 40 watt minimum, high power, wirewound resistor. Sizing the dynamic
brake resistor depends on load inertia, motor voltage, and braking time. Use a lower-value,
higher-wattage dynamic brake resistor to stop a motor more rapidly. Recommended values are 15
ohms for a 130 VDC motor and 30 ohms for 240 VDC motor.
The motor must come to a complete stop
before changing directions.
REVERSING
S3
S2
S1
RUN
DECEL TO
MIN SPEED
10K OHM
SPEED ADJUST
POTENTIOMETER
CW
Decelerate to Minimum Speed
The switch shown below may be used to decelerate a motor to a minimum speed. Closing the switch
between S1 and S2 decelerates the motor from set speed to a minimum speed determined by the MIN
SPD trim pot setting. If the MIN SPD trim pot is set full CCW, the motor decelerates to zero speed when
the switch between S1 and S2 is closed. The DECEL trim pot setting determines the rate at which the
drive decelerates. By opening the switch, the motor accelerates to set speed at a rate determined by
the ACCEL trim pot setting.
Decelerate to Zero Speed (Coast)
See INHIBIT in the CONNECTIONS section on page 1 for a description of wiring and connection
locations.
Decelerate to Zero Speed (Dynamic Brake)
Dynamic braking may be used to rapidly stop a motor. For the RUN/BRAKE switch, use a two pole,
two position switch rated for at least the armature voltage rating and 150% of the armature current
rating. For the dynamic brake resistor, use a 40 watt minimum, high power, wirewound resistor. Sizing
the dynamic brake resistor depends on load inertia, motor voltage, and braking time. Use a lower-value,
higher-wattage dynamic brake resistor to stop a motor more rapidly. Recommended values are 15
ohms for a 130 VDC motor and 30 ohms for 240 VDC motor.
DECELERATING & STOPPING
INHIBIT
MOTOR
A2
A1
RUN
BRAKE
DYNAMIC BRAKE
RESISTOR
Operation
80
5
C
AC1
R
B
+
-
R
B
+BUS
R503
-BUS
T501
PS2
PS1
S
S
PS4
PS3
PS
LIMIT
115
F+
A1
A1
C507
C506
C505
G
F-
A2
A2
TH501
R501
S
20
5
W
S
10
5
W
03
2
03
2
AC2
POWER
CURR
+15
INHIBIT
L1
230
S1 S2 S3
SPD SPD
IN
JOG
MIN SPD
DECEL
ACCEL
JOG
MAX SPD
TORQ LIMIT
IR COMP
C502
IC502
IC501
C504
Current Limit
LED
Power
LED
Current Limit (CURR LIMIT):
Red LED lights whenever the drive reaches current limit.
Power (POWER ON):
Green LED lights whenever AC line voltage is applied to the drive.
LEDs
Startup
STARTUP
Input Voltage Select (SW501, SW502)
Set the voltage switch SW501
and SW502 to either 115V or
230V to match the AC line voltage.
- Verify that no foreign conductive material is present on the printed circuit board.
- Ensure that all switches are properly set.
1. Turn the speed adjust potentiometer to “0” (full CCW).
2. Set the POWER switch to the ON position.
3. Slowly advance the speed adjust potentiometer clockwise (CW). The motor slowly accelerates as the
potentiometer is turned CW. Continue until the desired speed is reached.
4. Set the POWER switch to the OFF position to coast the motor to a stop.
SELECT SWITCHES
Input
Voltage Select
(SW501, SW502)
80
5
C
AC1
R
B
+
-
R
B
+BUS
R503
-BUS
T501
PS2
PS1
SS
PS4
PS3
PS
LIMIT
115
F+
A1
A1
C507
C506
C505
G
F-
A2
A2
TH501
R501
S
20
5
W
S
10
5
W
03
2
03
2
AC2
POWER
CURR
+15
INHIBIT
L1
230
S1 S2 S3
SPD SPD
IN
JOG
MIN SPD
DECEL
ACCEL
JOG
MAX SPD
TORQ LIMIT
IR COMP
C502
IC502
IC501
C504
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reproduced
or retransmitted in any form without written permission
from American Control Electronics
®
. The information and
technical data in this document are
subject to change without notice.
American Control Electronics
®
makes no warranty of any kind
with respect to this material, including, but not limited to, the implied warranties of its
merchantability and fitness for a given purpose.
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®
assumes no
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commitment to
update or to keep current the information in this document.