help G-code optimization

[Vladimir]

What to use to optimize G-code?
Idling takes up to 40% of the time.
https://github.com/euphy/polargraph/wiki/Vector-Optimizer
This optimizer does not fit, but the idea is excellent …

[Dan]

40% of the time in which drawings?

For example, in DXF files if you select “optimize dxf on load” it will sort the lines to be vastly more efficient.

[Vladimir]

I’m preparing files in ngc format with the size of 80 mb and more, so out of 10 hours of drawing 4 hours goes to idle moves…

[Dan]

40% of the time in which drawings?

[Dan]

More generally, after generating gcode a script could re-arrange all pen-up moves to try and find nearest neighbors.

afaik this is a np-complete problem, nobody has a best solution that works in known finite time.

[Vladimir]

from 10 hours of drawing – 4 hours of idling

[Dan]

Please send me the image and the steps you are taking. I will see what I can do.

[raphmann]

dxf-export has a bug.

A script to sort ngc-code would be perfect.

Raphael

[Dan]

@raphmann you’ll have to provide more detail than “dxf-export has a bug.” how do i recreate it?

[raphmann]

When I open a svg-file in Makelangelo, I would like to save it as dxf. When I
open this dxf-file in Makelangelo again (I would like to use “DXFOptimizeOnLoad”), no
image or drawing appears. In the lower field of the Software there is written:

FielTypeDXF2…
Converting temp 1258299040791194320.ngc
Done!
3 line segments.
28.300001cm
Estimated draw time 0s
Completed

[Dan]

SVG support in Makelangelo is very limited. I would try opening the file in Inkscape (free), make sure to “ungroup” and “convert to path” all objects, then save to dxf and load in makelangelo.

3 line segments in the file sounds very small. Looks like one pen up, one move to start, and one move back home.

[Author]

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