Lightburn native circle cuts through nicely vs the imported dxf of the same circle which does not. I would have guessed this is due to DXF format which includes many more line segments but this is not the case with perfect circles.
Ran some more tests. Looks like Convert to path is the culprit.
Imported DXF As-is: cuts through clean
Imported DXF > Convert to path: does not cut as clean and leaves a thin layer of wood which makes it harder to push the parts out of the playwood. feels like running 30% slower makes both shapes cuts evenly.
‘Convert to Path’ shouldn’t actually change anything - it just takes the already generated path and switches the object from being a dynamically generated circle (4 splines) to being a path object that’s just those 4 splines.
Interesting. Obviously there are differences cause native circles cuts clean at 20mm/s and DXF at 10mm/s - quite a big difference.
I Just saved 3 gcode files
native 20mm circle
dxf 20mm circle
dxf converted to path
it does looks like path and original dxf are same files. very interesting cause my physical results are different. maybe my issues is not the convert to path but with native shapes and dxf. huge difference - twice the time to cut dxf files.
I guess I need to run more tests.
I must understand why my DXF projects needs to be cut at much slower speeds.
I ran into this issue during a big DXF based project. i replaced drill holes with native circles and the outcome made me wonder what goes on.
Thanks Ralph. you taught me some new terms. I will run some more tests. I really like to get to the bottom of this and if this is a smoothie firmware and/or hardware that is to blame. I do tend to break shapes and rejoin shapes to fix bad/broken dxf files so the laser head will not jump around. It will help to know if Smoothie somehow changes the laser power during specific segments / shapes.