I was investigating an issue with my X-axis skipping on a couple of cuts when I ran into an issue. I went to initialize the machine and it started making kind of a grinding sound when moving along X and seemed to move the wrong way. Here’s a link to a video showing what happened.
Immediately prior to this, I had been moving the gantry manually trying to see if there were sticking spots or anything I could feel. It seemed to move well with no issues. I had also checked the set screws on the X-axis motor pulley, as well as both the Y-axis pulleys. None of them were loose at all. I’d also checked the V-wheels, which seemed fine - tight but movable with pressure. Lastly, the belts also seem in good shape and not loose.
The skipping only happened twice and the incidents were sporadic. The first was while I was doing a finishing pass with a bowl bit. It was taking off about .01 of material, so should not have been bound in any way. I was watching it and as it moved along the X-axis, it made a “clunk” sound and next thing I know, the machine is cutting through the right side of the bowl. I thought maybe the pulley had caught on some bits of wood so I cleaned everything well and it seemed fine after that for several other projects, and then it skipped again on a much larger cut two days ago. I was in the room but not watching it and I didn’t notice until it was finished.
I’m happy to check other things or provide additional details. I’m hoping someone can help.