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Service Manual
DC 4Q A Series
The converter is equipped with 4 trimmer with the following meanings:
NOTE:
- In Chapter 4.7 explains how to dynamically tune the motor by acting on the 2 trimmer GAIN and
DERIV.
- All potentiometers are disabled in Torque mode
4.6 Potentiometer adjustements
FUNCTION
SPEED
Motor fine speed calibration.
With rotating clockwise (CW) or counterclockwise
(CCW) is possible increase / decrease the speed of the motor with range + / -25%
OFFSET
Offset adjustment. Allows the b
alance to zero motor speed. Adjust this
potentiometer to cancel any motor speed offset when the Velocity input is zero.
(Max Velocity compensation +/- 250mV).
GAIN
Gain potentiometer.
This adjustment improves the dynamic behavior of the motor.
clockwise (CW) we increase the readiness and response of the motor. With
a clockwise turn (CW) we increase the gain of the PI “internal speed loop”.
DERIV.
Derivative potentiometer.
Acting in a clockwise (CW) can dampen any
oscillations of the motor due to a high moment of inertia of the load.
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