[OpenSCAD] DXF for cut and engrave

David Gustavson dbg at SCIzzL.com
Thu Oct 24 15:59:00 EDT 2019


I like to generate my engravings in the PostScript graphic language, which allows full algorithmic numerical control of the lines, and understands fonts well.
Acrobat or Mac OS convert the file to PDF, which most laser cutters can be driven by.

-- 
 David Gustavson
 dbg at SCIzzL.com



On Thu, Oct 24, 2019, at 6:05 AM, 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.
> 
> 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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