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Laser

Discussion in 'SketchUcam Help' started by Ringo Davis, Jan 8, 2018.

  1. Ringo Davis

    Ringo Davis Member

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    I'm trying to test out a laser module. I drew a little happy face. When I generate the gcode it looks ok in sketchup, but has a bunch of circles in Mach3. What Am I doing wrong?
    Thanks
    Ringo
     

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    Ringo Davis, Jan 8, 2018
    #1
  2. swarfer

    swarfer Moderator Staff Member

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    Hi Ringo
    Mach3 defaults to absolute IJ format for ARCS but SketchUcam uses incremental format.
    There is an option for outputting the code to set MAch3 to incremental mode:
    In Sketchup click Tools
    Phlatboyz
    options
    feature options
    then set 'use incrmental IJ' to true

    now regenerate your gcode

    be aware that Mach3 will probably remember this setting until it is changed so it will expect incremental arcs next time it starts up.
    To set it back to absolute mode give a
    G90.1
    command. Technically every Gcode file you run should have either G91.1 or G90.1 at the top to set the mode it needs, never leave anything to chance! (but Sketchucam has to have this as an option because GRBL does not recognize the command)
     
    swarfer, Jan 9, 2018
    #2
  3. Ringo Davis

    Ringo Davis Member

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    Thanks, I appreciate the explanation and the help.
    Ringo
     
    Ringo Davis, Jan 9, 2018
    #3

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