Shapeoko 3 XXL Z-Plus Stuttering

[neilferreri (Neil Ferreri Ω)]

My guess would be the stepper connector in the drag chain.

Stepper motor troubles (FIXED)

I know this is an old thread. I remembered it as soon as I just had the issue on my 2015 SO3, upgraded to an XL when that was a new thing. You can see the black burn mark on the housing where I removed the pin. The other side of the connector showed signs of melting. [PXL_20210810_172124911] [PXL_20210810_172049052] So, I knew where to look, and I can put a new connector, but I’d like to know why this happens. Is it simply due to an inconsistent connection, maybe a broken solder joint on t…

EDIT: Actually just saw that it’s happening with power off? Something else if that’s the case.