Rapid-Air PALLET MASTER (PMD): PMD35 & PMD50. 115VAC, 1PH, 60HZ - Manual (Page 38)

Rapid Air Corporation
To set the CL to factory specifications adjust as follows:
1. Set speed control knob at approximately 30-50% CW rotation.
Set CL trimpot to full CCW position.
2. Connect a DC ammeter in series with the armature lead.
3. Lock shaft of motor (be sure CL pot is in full CCW position).
Apply power and rotate CL pot CW slowly until DC ammeter reads 1.5
times motor
rating (do not exceed 2 times motor rating, Max. CW position.)
F. IR Compensation Adjustment. IR compensation is provided to
substantially improve load regulation. If the load presented to the motor does
not vary substantially, the IR adjustment may be set at a minimum level
(approximately 1/4 of full setting). The control is factory adjusted to
approximately 3% regulation. If superior performance is desired (less than 1%
speed change of base speed from 0 to full load), then the IR comp. Should be
adjusted as follows:
1. Set IR comp. trimpot at approximately 25% of CW rotation. Run motor
unloaded at approximately 1/3 speed and record RPM.
2. Run motor with maximum load and adjust IR comp. trimpot so that the
motor speed under load equals the unloaded speed per step 1.
3. Remove load and recheck unloaded RPM. If unloaded RPM has shifted,
repeat procedure for more exact regulation.
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