I have recently upgraded successfully to a HY 2.2KW spindle & inverter on my old 24x48 cnc router.
i'm going through some squaring and calibration exercises and seems that every time i am sitting in front of my machine, i'm letting my OCD take over and wind up spending hours chasing the mythical unicorn...
in terms of accuracy in steps/inch configuration, i am performing a 4" x 4" grid peck drill with a 1/4" bit and using 1/4" steel dowels to measure.
once this is achieved, then there's the squaring issue where i'm trying to adjust this with a movable sensor in the slaved A axis (slaved to Y)
i'm actually using a 3-4-5 triangle jig... but open to suggestions as if your Y movement and X movement are different, then your triangle legs that you cut along the Y axis may not quite fit on the X...
so before i go nuts again... here are some questions to the pros that have a diy cnc router up and running....
1) what is your "acceptable" tolerance in the x and y?
2) are you able to get repeatable results once calibrated?
thanks in advance,
Al