Could someone explain why,

Could someone explain why, when I set the machine in a position I call home, xyz 0 and depress the (set mch zero) button the numbers don’t 0 out!

Because your G54 work coordinate system has it’s own offset. I always leave my G54 at 0,0,0 to not have that happen to me either.

So did I change my G54 because I was seeing xyz 0 at the home position yesterday! If so can I change it g54 back? Thanks for your fast response and for developing chilipeppr!