I am using an openbuilds ACRO 1010 with lightburn software. Everything has been working flawless till now. Today I went to install a Z axis drive. I have it wired but laying on the bench till I get everything sorted out. I enabled Z axis in the lightburn software. It will follow up/down commands properly from lightburn. How ever, it does not respond to a Homing command, (the other 2 axis are fine) I am running GRBL 1.1f. I have set $132=50 for the stroke of the Z axis. Any thoughts? Lightburn thinks it is a GRBL issue.