Runaway Z Axis on home button

Hey guys, Need some advice with a problem setting up my GRBL 3018 CNC with Lightburn. The Y & X Axis work fine but I’m using a Diode 2.5w laser and don’t need the Z Axis but when I hit the home button the Z Axis travels all the way to the top so have to turn of machine as don’t have limit switches. I can then manually wind the Z Axis back down but then when I turn it back on it continues trying to travel up causing ne to turn it off again. Turn it back on again the Z stays in place but will do it all over again If the home button pushed. When doing this I moved to Y or X but when home pushed it only moves Z Axis. I use the machine with a spindle to machine Acrylic panels and it worked flawlessly & used it with laser using GRBL Laser with no problems. Thanks for any help. I searched the forums but couldn’t find anything similar. Cheers

Please try searching

Grbl z axis commands

Or similar in the forum search box. To here are many entries that might assist

Fingers crossed for luck

Regards

Gary

This might help and would be worth reviewing:

Cheers for that Rick, Will check it out.