PRS Jittery motors

[benchmark]

Hi all

I have a PRS Alpha that has developed jittery stepper motors, withe gantry creeping while idle.

I have reported it to support, but as yet not heard back.....I am really desperate with a pile of work to do.

Any ideas ?


Paul

[cnc_works]

When I installed the spindle on my smaller cnc, I discovered that if I turned the spindle on without the steppers being engaged, they would make very strange noises and do a chattering move. I improved the grounding and was able to reduce it to a very short noise. But now, of course, I always make sure the steppers are engaged before starting the spindle rotating so I get no chattery movement at all.

Don't know if it relates, but it is one of my experiences that sounds a little similar.

Donn

[benchmark]

Thanks Donn,

My earthing is fine, I will be looking for something else.

Paul

[bleeth]

Sounds like communication from PC to Control. Clean up your start-up if necessary; Change out your cat cable, and try another port.

[benchmark]

Turns out that in the UK the power breakers in the UK have twin contact, one set was sticking...Now fixed, Thank you Frank at support.


Paul