QSG-0094 rev 0
Calibration
Minimum Speed (MIN):
The MIN 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 MIN:
1. Set the MIN trim pot full CCW.
2. Set the speed adjust potentiometer for minimum speed.
3. Adjust the MIN trim pot until the desired minimum speed is reached or is just at the threshold
3.
of rotation.
Maximum Speed (MAX):
The MAX setting determines the maximum motor speed when the speed
adjust potentiometer is set for maximum speed. To calibrate MAX:
1. Set the MAX trim pot full CCW.
2. Set the speed adjust potentiometer for maximum speed.
3. Adjust the MAX trim pot until the desired maximum speed is reached.
Check the MIN and MAX adjustments after recalibrating to verify that the motor runs at the
desired minimum and maximum speed.
Torque (CURR. LIMIT):
The CURR. LIMIT setting determines the maximum torque for accelerating and
driving the motor. To calibrate the CURR. LIMIT:
1. With the power disconnected from the drive, connect a DC ammeter in series with the
1.
armature.
2. Set the CURR. 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 CURR. LIMIT trim pot CW until the armature current is 150% of motor
6.
rated 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.
Startup
- Verify that no foreign conductive material is present on the printed circuit board.
1. To turn on the drive, turn the speed adjust potentiometer clockwise until it clicks.
2. 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.
3. Turn the speed adjust potentiometer fully counterclockwise (CCW) until it clicks to shut the drive off.
No part of this document may be
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.
American Control Electronics
®
assumes no
responsibility for any errors that may appear in this document and makes no
commitment to
update or to keep current the information in this document.
