Leadshine EL8 Servo motor clonking sound and motion

23 Oct 2025 08:09 #336943 by Will_cnc

Leadshine EL8 Servo motor clonking sound and motion was created by Will_cnc

Current Setup:

Raspberry Pi 5
- 3 × Leadshine EL8 Servo Drives and 400W Motors
  
  Problem:
  I’ve recently set up LinuxCNC on a Raspberry Pi 5 and configured it to use the Probe Basic user interface.I’m experiencing an issue where the servo drives occasionally disconnect. The main symptom is that the motors sometimes make a “clonking” sound while running, as if there’s a mechanical fault and judder under movement . Power-cycling the system (turning it off and back on) sometimes clears the issue, and the motors then run normally.
  Could this problem be caused by poor latency on the Raspberry Pi 5, or possibly by the EtherCAT network going out of sync?Any advice or suggestions on how to resolve this issue would be greatly appreciated.

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23 Oct 2025 08:45 #336944 by Hakan

Replied by Hakan on topic Leadshine EL8 Servo motor clonking sound and motion

Show ethercat-conf.xml, please.
You probably need to add synchronization with DC clock.

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23 Oct 2025 09:44 #336947 by Will_cnc

Replied by Will_cnc on topic Leadshine EL8 Servo motor clonking sound and motion

Is synchronisation something that has to be set up on the PI or is it configured within the .xml file ?

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23 Oct 2025 09:45 - 23 Oct 2025 09:47 #336948 by Will_cnc

Replied by Will_cnc on topic Leadshine EL8 Servo motor clonking sound and motion

File Name: ethercat-c...0-23.xml
File Size:3 KB

Last edit: 23 Oct 2025 09:47 by Will_cnc.

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23 Oct 2025 09:51 #336949 by Hakan

Replied by Hakan on topic Leadshine EL8 Servo motor clonking sound and motion

Its here, just add a negative sign, minus-sign, like below
refClockSyncCycles="-5">

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