Set this to "G28" or "Clearance Height" based on whether your machine has physical home switches.
đź’ˇ This is the most common Mach3 error. It usually means your machine is set to "Incremental" arc mode while your G-code is in "Absolute" (or vice-versa). You can fix this in the Mach3 "General Config" menu or by toggling the "Use Radius" setting in your Fusion 360 post-processing options. fusion 360 mach3 post processor download
Once you have downloaded your .cps file, follow these steps to install it: and enter the Manufacture workspace. Click on Post Process (the G1/G2 icon). In the Post Process dialog, look for the Setup section. Change the "Library" dropdown to Local . Set this to "G28" or "Clearance Height" based
When you run the post processor, you will see a list of "Properties" on the right side of the window. For Mach3, pay attention to these: You can fix this in the Mach3 "General