LAOS Laser

jaap wrote:

While engraving, the laser was sometimes moving to the wrong position. This resulted in some engraving-lines being engraved on the wrong place. In the image below, you can see that the wrong lines often went to the same (or a simular) point outside the image.

Very interesting to see that the lines do contain some (perhaps correct) raster data and only the vector moves are at fault here.

The fact that the incorrect moves are the same in a relative, on repeat runs, way may offer some insight into the failure mechanism.

The fact that the image engraving continues correctly after the glitch shows that the data is correctly read and the syncronisation is not lost. I wonder if the faulty lines would still engrave incorrectly if some/all other data lines around/near them were removed.

I do not know also makes me think that the vector move calculations have somehow been corupted due to calculation overflow in some strange way. The sample file appears to have no strange jumps or errors in the move commands.

I wonder if there is a way to check if the file is uploading correctly.

Seems to be related to the incorrect handling of SVG sub-paths. At the end of each subpath a line is drawn to the start of the path.
In Inkscape subpaths can be avoided by ungrouping all objects, convert all objects to paths and then split all paths.