LEESON SCR Thyristor Motor Control - Manual (Page 44)

38 Calibration SPEEDMASTER™ OPERATION MANUAL
MAXIMUM 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, set the MAX SPD trimpot full CCW. Turn the speed
adjust potentiometer full CW. Adjust the MAX SPD trimpot until
the desired maximum motor speed is reached.
Note: Check the MIN SPD and MAX SPD adjustments after
recalibrating to verify that the motor runs at the desired minimum
and maximum speed.
REGULATION (IR COMP)
The IR COMP setting determines the degree to which motor
speed is held constant as the motor load changes. It is factory
set for optimum motor regulation.
Recalibrate the IR COMP setting when using a lower
horsepower motor. Refer to the recommended IR COMP settings
on page 41 and 42, or recalibrate using the following procedure:
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 drive.