Sometimes they close, sometimes they’re perfect!.. I don’t get it!
Belts are nice and tight, there seems to be no play in the head, I adjusted backlash on Y to .25 which seems to generate perfect circles with no perceptible start / end point, but if I run the same file 20 times, several will be absolutely wonky… I lubricated the rails, and even checked square… everything is dead on.
Here’s a photo… you’ll see that most are dimensionally perfect, whereas I can put the cutout back in the hole and rotate it freely with no binding… but then there’s a couple that don’t close, and even one in the middle which is oddly misshapen.
This is a brand new problem, and I’ve been playing for about 8 straight hours now, and just can’t seem to make heads or tails of it.
Well son of a B! I had one set screw on the pully down inside the gantry where I couldn’t reach it which was completely stripped, but Loc-Tite was used to hoild it in place, so it wouldn’t turn… So no matter how much I tried, it would not budge… The other? well, they drilled a hole in the shaft of the motor, and put a long set screw right into the shaft… that sheared in 2… But! It wedged tight enough so that on not one , but three visual inspections, and “tightness checks”, it eluded me. I finally just tore the whole gantry down. That’s when I found it!
Now I’m back to perfect dimensional accuracy, and perfect circles…
