Quote from Ross on December 26, 2018, 9:39 am
Pinoy,
I am not an expert, but I think the Masso is way to close to your stepper motor drivers.
The other thing is to try shielded wiring from drivers to the Masso.
I was looking at this today it might help.
From Ross.
https://www.cnccookbook.com/cnc-electrical-noise-grounding-techniques-interference-filter/