IAI America SCON-C - Manual (Page 241)

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Appendix
 Home return ends in the middle in a vertical application.
Cause: [1] The load exceeds the rating.
[2] The ball screw is receiving torsional stress due to the affixing method of the actuator, tightening
of bolts only on one side, etc.
[3] The slide resistance of the actuator itself is large.
Action: [1] If [1] is the cause, reduce the load.
[2] Loosen the fixing bolts and check if the slider moves smoothly.
If the slider moves smoothly, review the affixing method and bolt tightening condition.
[3] If the slide resistance of the actuator itself is large, please contact IAI.
 The actuator overshoots when decelerated to a stop.
Cause: The load inertia is high due to an inappropriate balance of load and deceleration.
Action: Decrease the acceleration/deceleration setting.
 The home and target positions sometimes shift.
Cause: [1] The encoder waveform is disturbed by the effect of noise.
[2] In the case of a rod-type actuator, the non-rotation precision increased due to application of
rotating moment to the rod.
Action: [1] Check if the grounding is implemented correctly. Also check for any equipment being a potential
noise source.
[2] The actuator may have to be replaced in some cases. Please contact IAI.
 The actuator moves only a half of, or twice as much as, the specified movement.
Cause: [1] The combination of controller and actuator is wrong.
The lead length of the ball screw varies depending on the actuator type, so a wrong combination
will cause the movement and speed to change.
[2] Factory setting error at IAI
Action: [1] If multiple actuators of different types must be used, confirm using the identification labels, etc.,
that the correct actuator is connected to the controller.
[2] Please contact IAI.
 The SV lamp blinks.
The automatic servo-off mode is active. (This is not an error or fault.)