When I did my initial cuts I thought I had a situation where the machine wasn’t taking a new set zero position. I set it repeatedly and there were no errors UGS, but the machine insisted on changing to a new location and height. Given other teething problems I had I assumed it was something I had done or not configured and let it go. But I just had it happen again so I wanted to raise it and see if anyone else has seen it.
I make a marker holder so I could do some large scale plotting of images for the kids. Machine was working fine. I brought it to the approximate corner of the paper and slowly lowered it until I got a dab of ink on the surface and I reset my zeros. I then lifted the Z up about 5mm and started my gcode (a trace function from Fusion 360 of an SVG). The marker plunged HARD in to the paper (probably 3-4mm or more) and dragged along the paper.
I immediately stopped it and lifted the Z and brought it back to where I wanted the zero to be. I reset zero again, about 2mm above the surface of the paper to see what would happen. I re-ran my gcode and it again dove HARD in to the paper and dragged along. No bueno. I tried a third time. Same thing. The Z position was just not taking in the software.
I exited UGS and power cycled the Longboard and then restarted UGS. I loaded the same gcode file of the artwork and set the Z and this time it was fine. I made no other adjustments to the machine or software.
Has anyone else seen this where the Z zero is not updating correctly? If that had been an expensive cutting bit, I would have potentially ruined it and a workpiece, so definitely something I’m concerned about.