13
SPEEDMASTER™ OPERATION MANUAL
Calibration
MAXIMUM SPEED (MAX SPD)
The MAX SPD setting determines the motor speed when the
speed adjust potentiometer is turned full CW or reference signal
is at its maximum. It is factory set for maximum rated speed.
To calibrate, set the MAX SPD trimpot full CCW. Turn the speed
adjust potentiometer full CW or reference signal to its maximum.
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. When using 174103 drives in signal
mode, calibrate SIG MAX first. Refer to page 19.
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
in Figure 6 (page 16), 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 motor.
