Minarik NRGD-4Q Series, User Manual

Page: 52 / 80

40 Calibration
REGULATION (IR COMP)
The IR COMP trimpot (also known as regulation) determines the
degree to which motor speed is held constant as the motor load
changes. It is factory set for optimum motor regulation at
maximum rated horsepower.
To calibrate IR COMP (exact calibration):
1. Turn the IR COMP trimpot full CCW.
2. Set the speed adjust potentiometer or voltage input signal until
the motor runs at midspeed without load (for example, 900
RPM for an 1800 RPM motor). Measure the motor speed with
a hand held tachometer.
3. Load the motor armature to its full load armature current
rating. The motor should slow down.
4. While keeping the load on the motor, rotate the IR COMP
trimpot until the motor runs at the speed measured in step 2.
To calibrate IR COMP (approximate calibration):
If the motor does not maintain set speed as the load changes,
gradually rotate the IR COMP trimpot CW. If the motor oscillates
around the set speed (overcompensation), then IR COMP was
adjusted too high or too far CW. Turn the IR COMP trimpot
slowly CCW to stabilize the motor and regulate set speed. Repeat
this adjustment if necessary.
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