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dxf2gcode PostProcessor for plasma cutter.

Compatible with GRBL

Usage:

  1. Run your dxf design through dxf2gcode, using just one pass for z <= 0
  2. Run python mill2plasma.py <file_name>.ngc -c <cut_height> -p <pierce_height> -d <pierce_delay>, change items between <> with needed values for your material, <pierce_height> should be between 150% and 200% times <cut_height>
  • A new file named <file_name>_plasma.ngc will be created
  1. Prepare your CNC by referencing Z0 close above workpiece
  2. Run modified G-code, before each cut:
  • Torch will be referenced
  • The pearcing will take place for specified seconds at set height
  • Cut will begin

Principle of operation:

For plasma cutting it is important to have control of the distance between torch and workpiece, in order to accomplish this we can start by measuring material exact distance to torch using a probe sensor.

The postprocesor assumes there is a touch sensor connected to the Probe pin, it's also assumed that the plasma torch is activated through the Spindle Enable signal.

More in detail background including a more advanced method of constant height control, by sensing the torch voltage.