Please explain signal processing steps

[srwtlc]

What are the temps in your shop? Just for fun, leave the control box door open and place a fan blowing directly into the box. Possibly a bad solder spot that opens up when warm or other component.

[Beraht]

It is late June in Texas, so it on the hot side. Too late for that test. Already pulled the boards. While I understand the suggestion, I have a hard time wrapping my head around a break being the culprit. The behavior seems more like a short that allows Z signals to get to the Y motor. But I'll never claim to be an electronics guy.

[Beraht]

Follow Up: Apparently there is a problem on the control board. Installed a new control board and the problem disappeared.

[Red F]

Thanks for the update. Glad you got it sorted out