MIN The MIN trimpot sets the minimum speed. Turn the 10KΩ
speed adjust potentiometer full CCW before calibrating the
MIN trimpot. Adjust the MIN trimpot until the motor rotates at
the desired minimum speed.
IR COMP The IR COMP trimpot sets the voltage gain needed to
maintain the set speed of a motor under load. 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. Turn the IR COMP trimpot CCW to stabilize the motor.
See Figure 3 for typical IR COMP settings.
CURR. LIMIT The CURR. LIMIT trimpot sets the drive’s maximum armature
current limit. See Figure 3 for typical CURR. LIMIT settings,
or calibrate as follows:
1. With the AC line voltage disconnected from the drive,
connect a DC ammeter in series with the armature.
2. Set the CURR. LIMIT trimpot to minimum (full CCW).
3. Connect AC line voltage to the drive.
4. Turn the power on, and set the speed adjust potentiometer to
maximum speed (full CW).
5. Lock the motor armature. Be sure that the motor is firmly
mounted.
6. Adjust the CURR. LIMIT trimpot CW slowly until the
armature current is 120% of motor rated current.
7. Set the speed adjust potentiometer to minimum speed and
remove the stall from the motor.
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Document Number 250-0212 (Revision 0)
Printed in the U.S.A. – 8/95
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Figure 3. CURR. LIMIT and IR COMP Settings
Mounting
Mount C1XP drives vertically or horizontally using the two mounting keyholes on
the back of the case (Figure 1). The keyholes are 2.5 inches apart. For access to the
keyholes from the inside of the case, remove the four case cover screws and lift the case
cover straight out. Leave the case cover removed to wire the AC line and motor to the
drive.
Wiring
The C1XP case has two conduit holes on the bottom of the case, and one conduit hole
on the back of the case (Figure 1). Connect external wiring through any of these conduit
holes. Avoid using the same conduit hole for the AC line wires and the motor wires.
See Figure 2 for AC line and motor connections. Be sure that all connections are made
before operating the drive.
Operation
1. Push the speed adjust potentiometer knob to turn the power on. The POWER ON
LED lights when the power is on.
2. Rotate the speed adjust potentiometer knob clockwise until the desired speed is
reached.
3. Push the speed adjust potentiometer knob in to turn the power off. The POWER ON
LED shuts off when the power is off.
Calibration
Each drive is factory calibrated to its maximum horsepower rating. Readjust the
calibration trimpot setting to accommodate lower horsepower motors.
All adjustments increase with clockwise (CW) rotation, and decrease with
counterclockwise (CCW) rotation. Use a non-metallic screwdriver for calibration.
Each trimpot is identified on the printed circuit board.
MAX The MAX trimpot sets the maximum speed. Turn the
10KΩspeed adjust potentiometer full CW before calibrating
the MAX trimpot. Adjust the MAX trimpot until the desired
maximum motor speed is reached.
