IAI America ACON-CG User Manual
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10. T
roubleshooting
z Home return ends in the middle in a vertical application.
Cause:
[1] The ball screw is receiving torsional stress due to the affixing method of the actuator, tightening
of bolts only on one side, etc.
[2] The slide resistance of the actuator itself is large.
z The actuator overshoots when decelerated to a stop.
Cause:
The load inertia is high due to an inappropriate balance of loading mass and deceleration.
Action:
Decrease the acceleration/deceleration setting.
z 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.
z 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.
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.
z The SV lamp blinks.
This indicates that the automatic servo-off mode is currently active. (This is not an error or failure.)
Action:
Check / Change the parameters set in User Parameter No. 13 (Current Limit at Home Return).
Reference for setting is from 120% (when direction of home return is upwards) to the initial setting
or 80% (when direction of home return is downwards).
[1] Loosen the fixing bolts and check if the slider moves smoothly. If the slider moves smoothly,
review the affixing method and bolt tightening condition.
[2] If the slide resistance of the actuator itself is large, please contact IAI.