Rapid-Air DUAL SWIVEL REEL: 100 & 1000 SERIES - Manual (Page 15)

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 rat-
ing (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 con-
trol is factory adjusted to approximately 3% regulation. If superior performance is de-
sired (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 and unloaded speed per step 1.
3. Remove load and recheck unloaded RPM. If unloaded RPM has shifted, repeat
procedure for more exact regulation.
The RAMM is now compensated to provide minimal speed change under large varia-
tions of applied load.
NOTE: If only an AC ammeter is available, it can be installed in series with the AC
line. Follow above instruction; however, set AC amperage at .75 times motor rating.
NOTE:
1. Excessive IR comp. will cause control to become unstable, which causes motor
cogging.
2. For tach feedback applications the IR comp can be set to minimum rotation (full
CCW).