IAI America PCON-SE - Manual (Page 92)

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4. Description of Operating Functions
4.4.10 Power-saving Mode at Standby Positions
One general characteristic of pulse motors is that their holding current at standstill is higher compared to AC servo
motors.
Accordingly, as part of our energy-saving efforts IAI has developed a special mode to reduce the power
consumption at standstill when the actuator is programmed to stop for a long time at a standby position.
Use this mode after confirming that doing so will not negatively affect any part of the system.
The power-saving mode, or specifically full-servo control method, can be selected in the following three
conditions:
(1) The actuator is waiting with the servo turned ON after the power was input (but before the home return is
completed)
(2) The actuator is waiting after completing the home return operation initiated by the HOME input signal.
(3) The actuator is waiting at the target position after completing the positioning to that position
Set 0 or 4 to the parameter No. 53.
Set value
The power-saving mode is disabled (the actuator is fully stopped) 0
Full-servo control mode 4
Ŷ Full-servo Control Mode
You can lower the holding current of a pulse motor by servo-controlling the motor.
Although how much the current comes down varies depending on the actuator model, load condition, etc.,
the holding current normally drops to approximately one-half to one-quarter.
Since the servo remains ON, position deviation will not occur when this mode is used.
You can check the actual holding current on the current monitor screen of the PC software.
Take note, however, that micro-vibration or abnormal noise may occur if an external force is applied or
depending on the position where the actuator is stopped. Should you notice any micro-vibration or abnormal
noise that might affect your system, do not use this mode.
Caution: In the case of push-motion operation, the full-servo control mode will be disabled after the
actuator has successfully completed the push operation. The mode will be enabled, however,
if the actuator has missed the work.