Happy holidays everyone!
I’ve decided to start from scratch with the calibration of belt stretch in the X- and Y-axis, as my results are varying pretty wildly depending on the region of the machine.
Circle-diamond-square test is pretty off, and I’ve checked and re-checked and the machine is relatively in square. I believe that my belts are all as tight as they should be, though I haven’t tested these with a particular tool. When I power on the machine, I’ve been pushing the Y-axis against the backstop to make sure that it’s parallel on both Y-rails. I’m then drilling holes that should be exactly 6" from inside end to inside end. Here is what I’m getting:
All of them:
As you can see, I’ve drilled two series of holes along the Y-axis. The distance fluctuates a bit between the two series, but more importantly (I’m focusing more on the holes on the left), the difference between the first holes and the second sets of holes is .04", while the distance between the second and third sets of holes is .006". For reference, the middle set of holes is about at the center of the Y-axis of the machine, and almost all the way to the right side of the X-axis.
I’m a bit confused, because if the difference were consistently off, I could better understand how to adjust the $100 and $101 values, but because the Y-value distances not only change across the Y-axis, but also change slightly across the X-axis, I’m not sure how to account for this. I’m not seeking perfect tolerances across huge distances here, as I’m doing mostly sculptural work in wood, but some consistency would be nice - I’m trying out some 2-sided designs, and things are winding up pretty grossly misaligned.