30
Calibration
FORWARD TORQUE (FWD TQ)
The FWD TQ trimpot setting determines the maximum torque
for accelerating and driving the motor in the forward direction. It
also sets the maximum torque for decelerating the motor in the
reverse direction. Refer to Figure 17 (page 34) for
recommended FWD TQ trimpot settings or recalibrate using the
following procedure:
1. With the power disconnected from the drive, connect a DC
ammeter in series with the armature.
2. Set the FWD TQ trimpot to minimum (full CCW).
3. Set the speed adjust potentiometer to maximum forward
speed.
4. Lock the motor shaft. Be sure that the motor is firmly
mounted to withstand maximum torque generated by the
motor.
5. Apply line power. The motor should be stopped.
6. Slowly adjust the FWD TQ trimpot CW until the armature
current is 120% of rated drive current.
7. Set the speed adjust potentiometer to minimum.
8. Remove the power from the drive and unlock the motor shaft.
9. Remove the ammeter in series with the motor armature if it is
no longer needed and re-apply power to the drive.
Warning
FWD TQ should be set to 120% of drive nameplate current
rating. Continuous operation beyond this rating may
damage the motor. If you intend to operate beyond the
rating, contact your Minarik representative for assistance.
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