LEESON NEMA 4X SCR Control: 174107.00 - Manual (Page 26)

20 SPEEDMASTER™ OPERATION MANUAL
174107
Warning
Do not change the FORWARD / OFF / REVERSE switch
while the motor is running. The motor must come to a
complete stop before reversing. Changing motor direction
before allowing the motor to completely stop will cause
excessively high current to flow in the armature circuit, and
may damage the drive and/or motor.
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1. Set the FORWARD/OFF/REVERSE switch to the OFF position.
2. Set the speed adjust potentiometer (SPEED dial) to “0”, or full
CCW.
3. Apply AC line voltage.
4. Set the FORWARD/OFF/REVERSE switch to the desired
direction of rotation.
5. Slowly advance the speed adjust potentiometer CW. The motor
slowly accelerates as the potentiometer is turned CW.
Likewise, the motor slowly decelerates as the potentiometer
is turned CCW. Continue until the desired speed is reached.
6. To coast the motor to a stop, turn the speed adjust
potentiometer to “0” or set the FORWARD/OFF/REVERSE
switch to the OFF position.
7. To reverse direction:
a. Set the FORWARD/OFF/REVERSE switch to the OFF
position.
b. After the motor comes to a complete stop, set the
FORWARD/OFF/REVERSE switch to the desired direction
of rotation.