Overcurrent Error - Revision history

OLT at 08:34, 26 March 2026

2026-03-26T08:34:50Z

← Older revision		Revision as of 08:34, 26 March 2026
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	In some cases an overloaded axis can be fixed by [[Motor Current Parameters BLDC\|increasing the current limit]]. However, this is discouraged and should only be the last resort since it can damage components if not done carefully. The current of igus ReBeL axes should generally not be increased past the standard value.		In some cases an overloaded axis can be fixed by [[Motor Current Parameters BLDC\|increasing the current limit]]. However, this is discouraged and should only be the last resort since it can damage components if not done carefully. The current of igus ReBeL axes should generally not be increased past the standard value.

	[[Category:TinyCtrl]][[Category:Troubleshooting]]		[[Category:TinyCtrl]][[Category:Troubleshooting]][[Category:Rebel]][[Category:Gantry]]

OLT: /* Axis is able to move */

2026-03-09T09:37:04Z

Axis is able to move

← Older revision		Revision as of 09:37, 9 March 2026
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	** Check whether the axis is easy to move when not powered (turn off the control cabinet or enable [[Zero Torque Mode]])		** Check whether the axis is easy to move when not powered (turn off the control cabinet or enable [[Zero Torque Mode]])
	** Check whether the linear rails are properly aligned		** Check whether the linear rails are properly aligned
			***'''You can find instructions on how to do align your gantry here''': [[https://www.igus.eu/product/PictureSliderMaster/20870?art=DLE-RG-0004&article=80811&variant=1&pict=5&culture=DEen Video]] [[https://igus.widen.net/content/b3canvpnd6/original/LCA_DS_Gantry_robot_alignment_EN_2.pdf PDF]]
	* Check whether the robot moves reliably without load at the tool (or without tool if it is heavy).		* Check whether the robot moves reliably without load at the tool (or without tool if it is heavy).
	** Try lowering the weight		** Try lowering the weight

OLT: 1 revision imported

2025-08-11T10:13:26Z

1 revision imported

← Older revision	Revision as of 10:13, 11 August 2025
(No difference)

cpr>Mab at 11:12, 26 June 2025

2025-06-26T11:12:01Z

New page

The overcurrent ("OC") [[Error Codes|error]] occurs when an axis draws more current than its maximum set value.

This error generally only occurs on our closed loop BLDC axes, which draw as much current as needed by the requested motion (i.e. if you try to move faster or increase the axis' load it will need more current to follow the target position). If an axis tries to move faster than possible but does not reach its maximum current a [[Position Lag|position lag error]] may occur instead.

Our open loop stepper controllers always draw the maximum set current for the motion situation (moving, idling, referencing,...), if they get overloaded an [[Encoder Error|encoder error]] may occur indicating position lag.

If the error occurs when starting the motion or trying to move slowly the axis may be blocked or defective.

= Troubleshooting =
== Axis does not move at all or only slightly ==
Symptoms (Overcurrent error occurs when):
* when enabling the axes
* when starting to move
* when trying to move slowly

Check the following:
* Check whether the axis is blocked by some obstacle
* For linear rails without brake: Check whether the axis is easy to move when not powered (turn off the control cabinet or enable [[Zero Torque Mode]])
* For motors with a brake: Check whether the brake is released
** The LED at the brake relay should be lit
** Check whether voltage is applied to the brake
* For [[ReBeL|igus ReBeL]] arms
** Do a [[Troubleshooting_Axis_Firmware_Issues|firmware and parameter update]]
** If this does not help [[Support Routes|contact support]], there may be a defect

== Axis is able to move ==
If the axis is able to move further than just a few degrees or mm but fails during faster motion it likely is overloaded. Check the following:
* Check whether the axis is blocked by some obstacle
* For linear rails without brake:
** Check whether the axis is easy to move when not powered (turn off the control cabinet or enable [[Zero Torque Mode]])
** Check whether the linear rails are properly aligned
* Check whether the robot moves reliably without load at the tool (or without tool if it is heavy).
** Try lowering the weight
** Try decreasing the speed of the failing motion command
** Consider increasing the current limit if nothing else helps

In some cases an overloaded axis can be fixed by [[Motor Current Parameters BLDC|increasing the current limit]]. However, this is discouraged and should only be the last resort since it can damage components if not done carefully. The current of igus ReBeL axes should generally not be increased past the standard value.

[[Category:TinyCtrl]][[Category:Troubleshooting]]