I am using an ACRO with black box controller. Currently, I'm only using X and Y. Is it possible to use a rotary on the Z axis if its not in use? I tried searching for similar topics but couldn't find anything. Thank you
probably possible, yes. special soffware required, yes (for generating or modifying Gcode). advisable, no. too much can go so wrong (-: fun to mess with, yes (-:
As grblHAL supports 4th axis, it would be easier yes. X on X, both Ys in parallel on Y1. Y2 becomes A when you flash the 4th axes firmware, and you still have option for a Z axis. You can use the Z driver but would need to compile yourself. The default is great though. Adding a little Z also opens doors to multipass cutting, focusing, 3d lasering, etc