Contributors:
Any insight provided would be helpful. After about one year of disuse and had to reinstall Mach4 on my PC when started the program and CNC router up again a week ago. I had backed-up my profile. I am using the UC100 controller and all of my settings seem to have been restored. However when I open previous files that I successfully cut, the Z-Axis does not cut below 0.000. The X and Y follow the gcode but the z-axis limits are stuck at 0.000. The gcode instructions dictate a .250 rise to travel to the cutting position--the z-axis does move up .250. However, despite being zeroed at the top of my .750" material, the z-axis does not follow the gcode instructions to cut at successive depths of -.125 , -.250, -.365, etc. I checked the program extents and the calculated minimum and maximum travel distance is .250, which is incorrect. Things that I have tested: 1) my z-axis jogs below 0.000 when I use the keyboard controls and when I use the gui jogging under "Trace". 2) my homing setting under "Configure/Controls" are set to "home in place"; soft limits are disabled. 3) manually copying gcode into the MDI box produces the same problem--no z-axis travel below 0.000. I have attached screenshots that may be of use. Thank you for your time and any insight you are able to provide.