IAI America PCON-PO - Manual (Page 96)

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6. T
roubleshooting
z The Actuator does not Operate when a Pulse Train is Input.
Cause: [1] The I/O I/F signal issued with the pulse train is invalid.
[2] The command-pulse train pattern is not set properly in the parameters.
Action: [1] Check the input signal.
[2] Check User Parameter No. 63 (Command-pulse input mode) and No. 64 (Polarity in command-pulse
input mode).
Caution: With certain third-party host controllers, the positive and negative logic settings of pulse train
patterns are opposite to those of IAI’s controllers. Reverse the positive and negative logic settings
to see if the problem is resolved.
z With an Actuator Installed in Vertical Orientation, Noise Generates during Downward Movement.
Cause: The load exceeds the rated load capacity.
Action: [1] Decrease the speed.
[2] Decrease the value set in User Parameter No. 7 (Servo gain number). As a guide, do not decrease
the setting to below 3.
z Vibration Occurs when the Actuator Is at Standstill.
Cause: The slider is receiving external force.
Action: If external force cannot be removed, increase the value set in User Parameter No. 12 (Current-limiting
value at standstill after positioning).
Increasing the setting of this parameter increases the holding torque. As a guide, keep the current
limiting value to 70% or below.
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.
[2] 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.
[3] Wrong electronic gear setting
[4] 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] Recalculate for electronic gear.
[3] Contact IAI.