2.6.3 Idle Current Reduction Set Up
Definition
The Idle Current Reduction function reduces the phase
current at times when no motor motion is commanded. With
this function enabled, the drive:
•
Reduces the current to both motor windings by one-half
nominal value. This reduction occurs whenever greater
than one second (approximately) elapses without a step
input pulse.
•
Keeps current at this power level until it receives a step
pulse. Then it returns the phase currents to the
previously set value and the step occurs.
Note 1: When ICR is enabled, the holding torque generated by
the motor is reduced by 50%.
Note 2: If you select a microstep setting and a current of 7.5 or
8.0 amps, ICR is automatically enabled, even if the switch is not
set to enable.
Benefits
The ICR function:
•
Allows the motor to cool during standstill for higher
duty-cycle applications.
•
Reduces 5630 power dissipation.
Procedure
With the power Off, enable or disable idle current reduction
by moving the switches to the appropriate positions as follows:
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To set current
reduction to ...
Move switch SW1 settings to .....
Enable
(Default factory
setting)
Disable