Minarik NRGD-4Q Series, User Manual

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6. If the motor shaft does not stop, but slowly rotates after
braking, adjust the BAL trimpot either CW or CCW
(depending on the direction of motor shaft rotation) until the
motor shaft comes to a stop.
OFFSET
37
Warning
The OFFSET trimpot is used to provide low-speed
regulation for certain drives. It is calibrated at the factory
and should not require adjustment. Please consult your
Minarik representative for more information before adjusting
this trimpot.
The OFFSET setting adjusts the zero offset voltage in the internal
velocity loop. This affects the gain circuit which controls motor
regulation.
To calibrate OFFSET:
1. Set the speed adjust potentiometer or analog voltage signal to
zero speed and apply input power. If in unidirectional mode,
set the speed adjust potentiometer fully CCW. If in
bidirectional mode, set the speed adjust pot to midrange or
50%.
2. Apply line voltage and observe motor behavior.
3. If the motor shaft “creeps”, i.e., slowly rotates with no signal
applied, adjust the OFFSET trimpot until the shaft stops
rotating.
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