I'm many hours into a confusing problem. On my 100W china laser, the X-axis does not cut at a 90 degree to the Y-axis. My gantry is true and square. When I move the head on the Y-axis front to back it stays straight (measuring from the gantry or wall to the laser head). When I move my X left to right, it measures a half-inch different for the left to right. In other words, from the front gantry rail to the X beam, it can be 5 inches from rail to beam, and on the other side, it will be 5.5 inches. I don't see any adjustments? When I tied to shim the rail end where it attaches to the mirror and guide assembly, it binds in the Y rails. It does a great job unless I need a square cut or a perfect circle, not other things you can't notice it's off.
The two pictures show what I was explaining, these are two left and right measurements from the true and straight gantry, to the x-axis beam.
The 3rd pic shows an L square up against the X axis beam showing how out of square it is.
Any help is greatly appreciated.
Thanks
Don