LEESON FHP Series NEMA 4x Variable Speed Drive - Manual (Page 46)

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SLIP COMPENSATION (SLIP COMP)
Slip compensation is used to minimize the normal speed
changes occurring in an induction motor from no load to full load
conditions.
1. Using the speed adjust potentiometer or reference
signal, run the motor at the desired RPM under a no
load condition. Measure the RPM with a tachometer.
2. Without changing the speed adjust potentiometer or
reference signal, apply a full load to the motor, and bring
the motor speed back up using the SLIP COMP pot to
the originally measured RPM.
3. These procedures, (1&2), may need to be repeated
several times to reach the desired accuracy required.**
**Wide speed range accuracy of the slip compensation
method depends heavily on motor slip vs. frequency
characteristics.
Calibration Procedure Conclusion
1. Set the speed adjust potentiometer or reference signal
to zero (full CCW).
2. Disable the drive by opening the ENABLE/DISABLE
switch or removing the jumper from TB501 (E2) and
(E1) terminals.
3. Remove power to the drive and motor. Calibration is
now complete.