2.6.1.3 Idle Current Reduction Set Up Using Switch S1
Definition
The Idle Current Reduction (ICR) function reduces the phase
current at times when the motor motion is commanded. Current
to both windings is reduced by one-half nominal value.
This function requires approximately one second without a step
input before reducing power. Current is maintained at this level
until a step pulse is received. Then the drive returns the phase
currents to the previously set value and the step occurs.
Note: When ICR is enabled, the holding torque generated by the
motor is reduced by approximately 50%. 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.
When ICR is enabled, motor stiffness around the holding position
is reduced by approximately 50%.
Benefits
The ICR function:
Reduces motor and drive heating during stand-by operation.
Reduces 5645 power dissipation.
Procedure
With the power OFF, enable or disable idle current reduction by
setting position 5 as follows:
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
To set current
reduction to ...
Move switch SW1 settings to .....
Enable
(Default factory
setting)
Disable
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5645 Installation and Hardware Manual
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