TREE J425 retrofit

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15 Sep 2019 16:43 #145265 by Thods1222
TREE J425 retrofit was created by Thods1222
I am retrofitting a J425 milling machine and I am attempting to not upset the existing wiring as much as possible. It came with a delta 20 and I have made interface cables to interface with the 7i77 mesa board. I am running into troubles hooking up the +-10v. I am seeing a .09vdc coming from the servo dynamics drives which I think is causing the motors to rotate clockwise slightly at about .5rpm. Is there a way to have the 7i77 null out the .09vdc to eliminate the precession? I have tried adjusting the pid but nothing helped. I have to admit I am a noob with linuxcnc and could use any help I can get.

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15 Sep 2019 16:50 #145268 by tommylight
Replied by tommylight on topic TREE J425 retrofit
Do not adjust the servo drives, that drift is normal and should not be removed.
If the motors are drifting and the Mesa 7i77 is wired and Linuxcnc is enabled, something is wrong with the wiring or config.
It is imperative to have Linuxcnc disable the drives before any attempt at tuning or anything else.
forum.linuxcnc.org/10-advanced-configura...ning-detailed-how-to
The following user(s) said Thank You: Thods1222

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