Rockwell Automation DC3N DC Drive User Guide, 1/4-2HP-115/230 VAC - Manual (Page 35)

27 Calibration
ATTENTION: The DC3 Drive is intended to operate at a predetermined
minimum speed. If the application requires zero speed operation, the user is
responsible for assuring safe conditions for operating personnel by providing
suitable guards, audio or visual alarms, or other devices. Failure to observe
these precautions could result in bodily injury.
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The MIN SPD setting determines the motor speed when the speed adjust
potentiometer is turned full CCW. It is factory set to zero speed.
To calibrate, turn the speed adjust potentiometer full CCW. Adjust the MIN SPD
trimpot until the motor has stopped (for zero speed setting), or is running at the
desired minimum speed.
MAX SPD
The MAX SPD setting determines the motor speed when the speed adjust
potentiometer is turned full CW. It is factory set for maximum rated speed.
To calibrate, turn the speed adjust potentiometer full CW. Adjust the MAX SPD
trimpot until the motor is running at the desired maximum speed.
ACCEL
The ACCEL setting determines the time the motor takes
to ramp to a higher speed. See Specifications on page 1 for approximate
acceleration times. ACCEL is factory set for the fastest acceleration time (full
CCW).
To set the acceleration time:
1. Set the speed adjust potentiometer full CCW. The motor should run at minimum
speed.
2. Turn the speed adjust potentiometer full CW 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.
MIN SPD