PRT 48x96 with 4G and PK296A1A SG7.2 motors
I recently had one of my X motors start to fail and I had it rebuilt locally. I installed it and it works good - allowing me to finish a deadline job.
On a different job a couple days later, the bot lost steps and cut through already cut sections and ruined the job.
In using the keyboard or MX (any distance) the gantry shudders or shakes like it has Parkinsons. It's less noticeable when doing a Jog move but it's still there. There is some uniformity or regularity to the shakiness if that makes any sense.
Thinking maybe a Gecko drive was causing it, I took the Y and Z Gecko drives and put them into the X drive locations on the board, and the X Geckos in the Y and Z locations. This didn't fix the problem so I ruled out the drivers.
I checked my unit values, they're what I normally use.
I tightened and loosened the turnbuckles but this made no difference.
Now I'm wondering if one of the resistors near the Geckos might be bad or something else on the board - or the power supply? I don't know what the resistors should read...
Could anyone having had similar problems give suggestions what to check next?