25
Calibration
The TQ setting determines the maximum armature current output of the drive.
Recalibrate the TQ setting when using a lower current rated motor. Refer to Figure 12
on page 27 for recommended TQ settings, or recalibrate using the following procedure:
1. With the power disconnected from the drive, connect a DC ammeter (0–15 A
minimum scale) in series with the armature.
2. Set the TQ trimpot to minimum (full CCW).
3. Set the speed adjust potentiometer to maximum (full CW).
4. Lock the motor armature. 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 TQ trimpot CW until the armature current is 120% of motor rated
armature current.
7. Set the speed adjust potentiometer to minimum.
8. Disconnect power from the drive.
9. Remove the ammeter in series with the motor armature if it is no longer needed
and unlock the motor shaft.
10. Re-apply power to the drive.
TORQUE (TQ)
Although TORQUE can be set to 120% of motor 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.
Warning
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