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Cutting a gear wheel

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Cutting a gear wheel

Home › Forums › CNC machines, Home builds, Conversions, ELS, automation, software, etc tools › Cutting a gear wheel

Viewing 4 posts - 1 through 4 (of 4 total)
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  • 20 May 2009 at 13:24 #41544
    Ruud Pollen
    Participant
      @ruudpollen12539
      Dear ….,
       
      I have made a file of X,Y points
      If connecting each pont to the next point I have a real good
      descriotion of my product and I can draw it by some macro”s in EXCEL
       
      The question is when I like to make use of   one of the CNC programs
      What I have to do when the mill diameter is for instance 3 mm?
      Can I generate a G plot file direct from my X,Y pony file and will do the
      CNC program the recalculation with the known mill diameter or
      should I do the recalculation by makeing an adapted G file?
       
      Ruud Pollen
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      20 May 2009 at 13:24 #14921
      Ruud Pollen
      Participant
        @ruudpollen12539
        22 May 2009 at 20:47 #41591
        Mark Fraser
        Participant
          @markfraser24249
          The trick will be the offset of points along non-orthogonal lines, or arcs.
          You’ll have to create another path one radius outside of the object’s
          outline.  Make sure the path goes in the desired direction – normal or
          climb milling.  I’d guess that the spreadsheet would be better as you can
          at least do math and geometrical calcs there, perhaps even trig.
          On the other hand, there are lots of free cad programs around, and 
          lots of .dfx to gcode (my fave is ace.convertor) freebies as well.  
          But the excel exercise is good as a basic learning tool…
          Sort of appropriate for MEs – spend more time making the tools
          than the object to be created therewith <grin> /mark fraser
          3 June 2009 at 19:57 #41687
          Maarten van Veen
          Participant
            @maartenvanveen30636
            If you really want to indulge yourselve in mathematics, you can work it out as Mark suggests. However, if you want to produce the part, try to create a *.dxf file and from there, use a CAD program. I use Cut2D to full satisfaction (usual disclaimer) . The program calculates the new path, taking into account the diameter of the endmill. Watch out, the program does not protest if you endmill has too large a diameter !
            I also use a program called involute.exe which creates the Gcode.
            regards, Maarten
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