Rockwell Automation DC3E Non-Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 63)

55 Calibration
Approximate IR COMP calibration:
If the motor does not maintain set speed as the load
changes, gradually rotate the IR COMP trimpot CW. If the
motor oscillates (overcompensation), the IR COMP trimpot
may be set too high (CW). Turn the IR COMP trimpot
CCW to stabilize the motor speed.
ACCEL
The ACCEL setting determines the time the motor takes to
ramp to a higher speed, within the limits of available
torque. The ACCEL setting is factory set for its fastest
acceleration time (full CCW).
To calibrate ACCEL:
1. Set the speed adjust potentiometer or external reference
signal for minimum speed. The motor should run at
minimum speed.
2. Set the speed adjust potentiometer or external reference
signal to maximum speed, and measure the time it takes
the motor to go from minimum to maximum speed.
3. If the time measured in step 2 is not the desired
acceleration time, turn the ACCEL trimpot CW for a
slower acceleration time, or CCW for a faster
acceleration time. Repeat steps 1 through 3 until the
acceleration time is correct.
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