DXF to Gcode for a laser cutter

[PiotrW]

Hello everyone,

first of all, big thanks to the developers for creating such a good program. Secondly, I have a laser cutter that accepts Gcode and wanted to optimise the conversion of DXF files to Gcode by changing a adding/changing three things. I would like to ask if future versions of dxf2gcode will allow me to:

• swap the M3 start milling command for a custom turn laser on/off command that is specific to my laser system
• eliminate drilling in the z-direction, as the laser does not do that
• introduce the use of G91 instead of G90

Many thanks and best wishes from Piotr

[Christian Kohlöffel]

Hello Piotr,

to give a very short answer. All done :-) ...

For details to all 3 of your questions please see below.

Am 26.08.2013 12:56, schrieb PiotrW:

Hello everyone,

first of all, big thanks to the developers for creating such a good program. Secondly, I have a laser cutter that accepts Gcode and wanted to optimise the conversion of DXF files to Gcode by changing a adding/changing three things. I would like to ask if future versions of dxf2gcode will allow me to:

• swap the M3 start milling command for a custom turn laser on/off command that is specific to my laser system

Thats already possible with current Postprocessor, no change required. Following change in Postprocessor required
    pre_shape_cut = Your Command %nl
    post_shape_cut = Your Command %nl

• eliminate drilling in the z-direction, as the laser does not do that

Thats already possible with current Postprocessor, no change required. Following change in Postprocessor Config required (Just delete all in the depth coordinates):
    rap_pos_depth =
    lin_mov_depth =

In addition you need to choose depth coordiantes which produce only one cut. (Refer to http://code.google.com/p/dxf2gcode/issues/detail?id=35)

• introduce the use of G91 instead of G90

    Thats already possible with current Postprocessor, no change required. Following change in Postprocessor Config required:
    abs_export = True

Many thanks and best wishes from Piotr

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[PiotrW]

Thank you so much Christian, you are great! It all works now the way it should!

[Timo Birnschein]

Thanks a whole lot! This just solved all of my Laser CNC problems!

Thanks again and keep up the great work!

Timo

[Tim Lovett]

Nice!

I was just wanting to change G90 to G91.

Router works great now. (To much trouble on a 2nd machine to re-zero the origin every time, so easier to use G91 instead)

Thanks!