I am using Mach3 software with a THC300 and just replaced the BOB.

I am a bit confused to how to set my Z axis. It doesn't seem to sit right on the machine when it runs. I can set up my go to zero and that is fine (did a paper test to set) but when I run the machine it doesn't go up to its position and sits too low when it torches. I am not sure what to change. I thought with the floating head it should touch the material and come back up. No matter what gcode I run I see the DRO for Z go to .9996 (when moving across the table) and .1406 when it torches. No matter what I have adjusted it remains the same.

I have read the manuals, googled etc and can't seem what setting I am missing.

Please help. I am a newbie and still learning a lot but seems this is my last leg..so close yet so far!