IAI America ACON-CY - Manual (Page 116)

104
7. T
roubleshooting
z With an Actuator Installed in Vertical Orientation, Positioning Completes Prematurely.
Cause: [1] The ball screw is receiving torsional stress due to the actuator affixing method, uneven
tightening of bolts, etc.
[2] The slide resistance of the actuator itself is high.
[1] To check if the condition in [1] is present, loosen the affixing bolts and check if the slider moves
smoothly. If the slider moves smoothly, adjust the affixing method and bolt tightening method.
[2] If the slide resistance of the actuator itself is high, contact IAI.
z The Actuator Overshoots while Decelerating to a Stop.
Cause: The load inertia is high due to an inappropriate balance of the load and deceleration.
Action:
Decrease the set deceleration.
z Stopped Position Sometime Deviates from the Home Position or Target Position.
Cause: [1] Encoder waveforms are disturbed due to noise.
[2] If the actuator is of rod type, non-rotational error increased due to application of rotational
moment to the rod.
Action: [1] Check if the grounding is provided correctly, and also check for any equipment that may be
generating noise.
[2] Depending on the condition, the actuator may have to be replaced. Contact IAI.
z The Actuator Moves Only a Half, or as Much as Twice, the Specified Travel.
Cause: [1] The controller and actuator combination is incorrect.
The ball screw lead varies according to the actuator type. If the actuator is not combined with an
appropriate controller, the travel and speed will change.
[2] Pre-shipment setting error at IAI
Action: [1] If multiple actuators of different types are used, check the label on each actuator or use other
means to see if they are connected to correct controllers.
[2] Contact IAI.
z The SV Lamp Blinks.
The automatic servo-off mode is 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).