I went through calibrating the x and y axis. It was off by a very small amount and I am adjusting $100 and $101 to compensate.
I then used my 123 blocks to determine whether the z axis on the stock Shapeoko Pro needed calibrating. I zeroed the router mount with two of the 123 blocks stacked on top of each other. I then removed 2” worth of 123 blocks. The distance that the z axis should have travelled down is 50.8mm. However the z axis only traveled down -50.63 (according to carbide motion). I tested this multiple times.
Additionally, when cutting MDF, the end mill has cut into the spoil board which aligns with the z axis being off.
I just wanted to validate with the brains trust that $102 is the value I should adjust and that even though the z axis is not belt driven, it also requires the calibration.