[OpenSCAD] DXF for cut and engrave

arnholm at arnholm.org arnholm at arnholm.org
Thu Oct 24 09:37:55 EDT 2019


On 2019-10-24 15:22, Troberg wrote:
> 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.

When you do 3D printing, the 3D model is sliced (you could call that the 
CAM part) and reduced to G-code which is essentially the same as "X, Y, 
power, speed" with some additions for extrusion parameters. So what you 
need is a kind of slicer software specialised for laser cutting.

> OpenSCAD does 2D fairly good, so usually it works out, but there are 
> two
> missing primitives which would help a lot: line and point.

Constructive Solid Modelling cannot use points and lines in the main 
process. But points and lines could be the result of postprocessing in 
some cases.

What is the typical file format you feed your laser cutter? Plain DXF?

Carsten Arnholm



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