my 2 cents..
When saving the .dxf, try saving as a R14 format. This is easily read by
most programs. The newer versions are full of headers that may cause
problems. The files are in ASCII so you can examine what's there and
compare versions.

I watched the video. Interesting. It looks like a 'scratchpatch' is needed
where the blade can be taken to re-orient for the next cut, instead of
trying to do a 360 on the spot and mess up the work..

Roland


On Thu, 25 Jun 2020 at 22:13, Martin Dobbins <tu...@hotmail.com> wrote:

> Just found a YouTube video about that, problem solved-maybe.  Thanks, Todd
>
> https://www.youtube.com/watch?v=40CRimcwAZo
>
> Martin
>
> ________________________________
> From: Todd Zuercher
>
> Freecad's g-code tools also includes drag-knife dress-ups.  I haven't
> tried to use them but think I'm about to.  (I have to set up some tool
> paths for a glass cutting head we just purchased (which is more or less a
> drag-knife.)
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -----Original Message-----
> From: Martin Dobbins <tu...@hotmail.com>
> Sent: Thursday, June 25, 2020 2:23 PM
> To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net>
> Subject: Re: [Emc-users] dxf2gcode
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> I really like openscad, and the uphill struggle with Freecad has just
> begun to get easier.  I had no idea that Freecad could make g code until
> Todd just told me 🙂
>
> The beginning of this video has a pretty good illustration of how a drag
> knife works (it's different):
>
> https://www.youtube.com/watch?v=8jHS2uZpfJg
>
> ________________________________
> From: Glenn Edwards
>
> All,
>
> I have purchased Q-Cad recently, the DXF portion is free and the CAM costs
> extra, and have found the DXF editor pretty good.  I have struggled with
> the CAM portion that does the DXF to G-code, however.  It does not seem
> well supported- email inquiries go unanswered.  My two-cents.
>
> Best regards,
> -- --
> Glenn
> Rapid Converting LLC
> gl...@rapidconverting.com
> www.rapidgasket.com<http://www.rapidgasket.com>
>
>
> On Thu, Jun 25, 2020 at 10:47 AM Todd Zuercher <to...@pgrahamdunn.com>
> wrote:
>
> > Freecad can make G-code directly, leaving out the DXF middle man.
> > Have you tried that?
> >
> > Todd Zuercher
> > P. Graham Dunn Inc.
> > 630 Henry Street
> > Dalton, Ohio 44618
> > Phone:  (330)828-2105ext. 2031
> >
> > -----Original Message-----
> > From: Martin Dobbins <tu...@hotmail.com>
> > Sent: Thursday, June 25, 2020 1:34 PM
> > To: Enhanced Machine Controller (EMC)
> > <emc-users@lists.sourceforge.net>
> > Subject: Re: [Emc-users] dxf2gcode
> >
> > [EXTERNAL EMAIL] Be sure links are safe.
> >
> > I've tried two coming from Freecad, both saved as "Autocad dxf",  one
> > was a simple 2D fully constrained 20mm square and the other was the
> > same thing padded to a thickness of 0.254 mm.  I can try a dxf from
> > another source if that is the problem.
> >
> > Martin
> >
> >
> >
> > ________________________________
> > From: Sebastian Kuzminsky
> >
> > On 6/25/20 10:43 AM, Martin Dobbins wrote:
> > > I'm trying to use this on Ubuntu 20.04 because I'm looking to write
> > > some
> > g code for a tiny (Roland) drag knife, I wanted to see how it handled
> > corners.
> > >
> > > Unfortunately, while the gui will load OK when I try to load a dxf
> > > I'm
> > getting a runtime error:
> > >
> > > File "/usr/lib/python3/dist-packages/dxf2gcode/core/shape.py", line
> > > 609,
> > in abs_iter
> > >      raise StopIteration()
> > > StopIteration
> > >
> > > The above exception was the direct cause of the following exception:
> > >
> > > Traceback (most recent call last):
> > >    File "/usr/bin/dxf2gcode", line 727, in open
> > >      self.load()
> > >    File "/usr/bin/dxf2gcode", line 874, in load
> > >      self.makeShapes()
> > >    File "/usr/bin/dxf2gcode", line 922, in makeShapes
> > >      self.makeEntityShapes(self.entityRoot)
> > >    File "/usr/bin/dxf2gcode", line 973, in makeEntityShapes
> > >      self.makeEntityShapes(newEntityContent, ent_geo.Layer_Nr)
> > >    File "/usr/bin/dxf2gcode", line 996, in makeEntityShapes
> > >      tmp_shape.AnalyseAndOptimize()
> > >    File "/usr/lib/python3/dist-packages/dxf2gcode/core/shape.py",
> > > line
> > 175, in AnalyseAndOptimize
> > >      self.setNearestStPoint(Point())
> > >    File "/usr/lib/python3/dist-packages/dxf2gcode/core/shape.py",
> > > line
> > 190, in setNearestStPoint
> > >      min_geo_nr, _ = min(enumerate(self.geos.abs_iter()),
> > > RuntimeError: generator raised StopIteration
> > >
> > > Any ideas for a fix?  This was supposed to be a quick project.
> >
> > That looks like a bug in dxf2gcode.  Can you post the DXF file that
> > causes the problem?
> >
> >
> > --
> > Sebastian Kuzminsky
> >
> >
> > _______________________________________________
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> >
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> >
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