[OpenSCAD] DXF for cut and engrave

nop head nop.head at gmail.com
Thu Oct 24 09:19:23 EDT 2019


Except that OpenSCAD can perfectly model anything you actually produce on a
laser because it is a 3D object. There is nothing wrong with OpenSCAD. The
problem is laser CAM doesn't work the same way as milling CAM and 3D
printing CAM. It could though.

On Thu, 24 Oct 2019 at 14:13, Troberg <troberg.anders at gmail.com> wrote:

> nophead wrote
> > Yes but laser drivers don't offset the cut by half the kerf and they
> don't
> > accept a 3D model that represents a surface with engraving as trenches
> > equal to the kerf and so derive a tool path running down the centre. A
> CAM
> > tool to drive a mill accepts a model of the intended result, not a tool
> > path. Laser artwork is just the tool path in different colours not a
> model
> > of the desired end result. OpenSCAD can produce a perfectly good model of
> > the end result. It can't produce tool paths.
>
> Actually, most laser software (LightBurn, RDWorks...) do offset by half the
> kerf. Not only that, they do a lot of other stuff associated with a tool
> path, such as which order to do things in (fastest, inside out, all at
> once,
> one object at the time...), burnthrough (remain still after igniting the
> laser for a short while to get a clean burn through), slowing down in
> corners (to avoid bounce), using less power in corners/starting/stopping to
> avoid overburn, adapting to acceleration limitations of the cutter and so
> on.
>
> They don't start from a 3D model, though, for obvious reasons. Lasers don't
> get 3D, they get X, Y, power, speed and that's all (slightly simplified).
> So, If I want to, say, cut out a circle with an engraved X, I need to model
> a circle, then two crossing lines. These needs to be in different layers in
> 2D.
>
> OpenSCAD does 2D fairly good, so usually it works out, but there are two
> missing primitives which would help a lot: line and point.
>
>
>
> --
> Sent from: http://forum.openscad.org/
>
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