I’m not sure what caused this, but the right y-axis belt (6mm) on my Late 2015 Shapeoko 3 just stretched past it’s limit and snapped. Yesterday, after tramming an 11x11 inch plate of aluminum down 1.5 mm I noticed that the right belt had substantially more slack than the left. Upon inspecting it, I found one of the teeth to be stretched to the point where it was almost flat.
Fast forward 18 hours… I somewhat forgot about the flattened tooth in the belt and just simply re-tensioned the belt. I ran a job of cutting a part out of acetal, and 90% through the job I see some jittering as the gantry traversed back in the y axis. That’s when I noticed that the belt had completely torn.
I can only think that the issue is that I may have overtightened the v-wheels on that side (I retightened everything recently after upgrading to the threaded table and updated z-axis plate).
Any thoughts? I would really hate for it to happen again.