IAI America ACON-CY - Manual (Page 71)

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5. Operation Using I/O Signals
Warning: The excited pole phase is detected when the servo is turned on for the first time after the
power has been turned on, or before an absolute reset is performed following the
connection of a simple absolute unit. For this reason, the actuator moves 0.5 to 2 mm under
the normal circumstances, although it depends on the lead length of ball screws.
(On rare occasions where the actuator position at which the power is turned on is not ideal,
the actuator may move by around one half the ball screw lead.)
If the power is turned on when the actuator is positioned near a mechanical end, the
detection operation may cause the actuator to contact the mechanical end and reverse.
Pay sufficient care so that the load and hand do not interfere with peripheral objects and get
damaged with this operation