Okey..
Made some changes.
Jazz will get upset because I made several changes at once and should this work I still don't know the fault :)

I looked at all wiring and found some places where I could improve so a little better cable management. Moved my relays with 24v logic further away from 230v and 50v.
Also disconnected and removed vfd control from the bob. Had it connected to on/off relay and 1-10v speed control.

After these changes it's been running 3h without fake e stop.

Read on cncdrive forum about similar problem and it turned out that it was interference from switches that caused it. Strange when the e stop was set to port and pin 0!

If it continues to work for me I need another solution for vfd control! Is rs485 to usb twowire system ok?
But that only let's you control speed and not start/stop from system? Or am I mistaken? :D

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