Ethercat random jitter fix

grandixximo
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20 Jul 2026 10:10 #347869 by grandixximo

Replied by grandixximo on topic Ethercat random jitter fix

Please share zipped configuration folder, or whatever you are willing to share to shed light on the issue.

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ruediger123
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31 Aug 2026 20:24 #349163 by ruediger123

Replied by ruediger123 on topic Ethercat random jitter fix

Hello,I am updating my test environment to the latest software version.I noticed that the noise issues occur roughly every 36 seconds.

Attached is the Halscope log.

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rodw
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01 Sep 2026 08:49 #349169 by rodw

Replied by rodw on topic Ethercat random jitter fix

This is more likely due to a Linux service firing regularly rather than being ethercat related.
What Operating system and kernel version.
What steps have you taken to tune your kernel?

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rodw
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01 Sep 2026 09:02 #349170 by rodw

Replied by rodw on topic Ethercat random jitter fix

Actually, it could be a regular wifi scan. Try this to disable it and report back.

sudo nano /etc/NetworkManager/conf.d/disable-bgscan.conf

Add this text and save

[device]
wifi.scan-rand-mac-address=no

[connection]
wifi.bgscan=no

then type

sudo systemctl restart NetworkManager

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ruediger123
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02 Sep 2026 14:56 - 02 Sep 2026 15:05 #349221 by ruediger123

Replied by ruediger123 on topic Ethercat random jitter fix

Hallo rodw,

the board is an Orange Pi 5 Plus without Wi-Fi.
kernel: Linux orangepi5-plus 6.12.0-rc7-edge-rockchip-rk3588 #5 SMP PREEMPT_RT
ethercat: IgH EtherCAT master 1.6.9 1.6.9-93-g4f9aa6f3
LINUXCNC - 2.10.0~pre1servo controller: 3 x Bosch-Rexroth HCS01.1EW0009-A-02-B-ET-CE-CE-L3

<master idx="0" appTimePeriod="1000000" syncToRefClock="true">
The setting results in the described error.

<master idx="0" appTimePeriod="1000000" syncToRefClock="false">
The setting results in the described error.

<master idx="0" appTimePeriod="1000000" refClockSyncCycles="1">
With these settings, the function works as intended.

Gruß
Rüdiger

Last edit: 02 Sep 2026 15:05 by ruediger123.

The following user(s) said Thank You: rodw

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Ethercat random jitter fix

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