Hi!
I have a UMO that is 5 years old by now. After not having used it for a while, I started it again today.
It behaves as usual for a while, maybe a layer or two, then it start behaving extremely weird.
The steppers motors randomly stop for a fraction of a second before starting again, creating huge offsets in the print.
When I stop the print, I can hear the stepper motors making "knocking" sounds as if that stopping behaviour is still active.
Please have a look at videos here: https://www.dropbox.com/sh/uchybg5w90g0x28/AAC-gMREDlmU-HKnsFPo_9DMa?dl=0
Why is this happening?
Thanks for your help!