[OpenSCAD] DXF for cut and engrave

nop head nop.head at gmail.com
Thu Oct 24 09:25:07 EDT 2019


No I don't know any CAM that does that except some slicers. I expect to
have to write it myself because the laser world has got this wrong.

On Thu, 24 Oct 2019 at 14:21, Rogier Wolff <R.E.Wolff at bitwizard.nl> wrote:

> On Thu, Oct 24, 2019 at 02:05:12PM +0100, nop head wrote:
>
> > There is no reason why a proper CAM program can't convert a thin cut
> > equal to the kerf into a single line down the middle.
>
> That's a feature that you think that a proper CAM program SHOULD have,
> or maybe you know of one that DOES have this.
>
> Us mortals have to use the tools that are available now. I don't have
> time to write everything myself. Other people don't have the time to
> wait for the developers (of their CAM workflow) to include such a
> feature.
>
>         Roger.
>
> >
> > On Thu, 24 Oct 2019 at 14:02, Troberg <troberg.anders at gmail.com> wrote:
> >
> > > nophead wrote
> > > > The problem is a laser doesn't cut a line with zero thickness but
> people
> > > > pretend it does.
> > > >
> > > > You can model any object a laser can produce in OpenSCAD. What is
> needed
> > > > is
> > > > a CAM stage for lasers that creates the tool path, just as 3D
> printing
> > > and
> > > > milling. For some reason the CAM stage is ignored when laser cutting.
> > >
> > > No, quite the contrary, we rely on it having some thickness, but we
> can't
> > > model it with thickness, because that would make the laser cut twice.
> > >
> > > We do have a CAM stage. In my case, I use LightBurn, and it does
> create a
> > > tool path. But, for example, a living hinge, requires lines of minimum
> > > width
> > > (ie the kerf of the laser, typically around 0.1 mm). The way OpenSCAD
> > > works,
> > > I would need to model them as very narrow rectangles, which causes the
> > > laser
> > > to cut twice (slow, cuts a wider line, leaves more charring and
> increase
> > > the
> > > tendency of the material to cach fire). Sure, LightBurn can remove
> > > overlapping lines, but as it's a very narrow rectangle, they won't
> overlap,
> > > they'll just be very close to each other.
> > >
> > >
> > >
> > > --
> > > Sent from: http://forum.openscad.org/
> > >
> > > _______________________________________________
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> > >
>
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>
>
> --
> ** R.E.Wolff at BitWizard.nl ** https://www.BitWizard.nl/ ** +31-15-2049110
> **
> **    Delftechpark 11 2628 XJ  Delft, The Netherlands.  KVK: 27239233    **
> The plan was simple, like my brother-in-law Phil. But unlike
> Phil, this plan just might work.
>
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