For context, I believe my machine was squared properly. I’ve been using it daily for the past two weeks without issues. Today, however, when performing a square cutout, the result was an equilateral parallelogram instead of a square.
At first I thought the issue might be feeds and speeds since the cut was across the grain, but even after slowing things down I got the same result.
I went back and followed the assembly instructions for squaring the machine. When measuring the diagonals, I found they were off by 5/8 inch. I converted that to mm and set that value as my pulloff on the Y0 motor. After testing again, I observed the exact same result.
Thinking I might have adjusted the wrong motor, I then applied the pulloff change to the Y1 motor instead, but again the result did not change.
While typing this, I realized something that may be the issue. I never use the limit switches. I broke two of them during assembly and never replaced them.
Does the pulloff setting only have an effect if the machine is homed first? In other words, does the machine need to home against the switches for the pulloff adjustment to actually take effect? I feel like a complete bonehead if this is the case.
If that’s the case, the setting would currently do nothing since I never home the machine. When I originally set up the machine, my diagonals were only off by about 1 mm, and I haven’t been cutting anything larger than a few inches in the X direction. So it’s possible the machine was square enough that I never noticed the issue until now.
One other change I recently made was swapping one of the Y-axis motors with one of these. From what I could tell, it looked identical to the original motor.