Fill Offset unexpected diagonal symmetry

LightBurn Software Questions
1

I’m using Fill Offset to etch this path out and it’s creating a diagonal symmetry as shown in the picture. I get why the blue circled are different thickness - the geometry of the laser. But I can’t figure out the odd symmetry and I couldn’t find this problem asked before.

I thought it was a line interval issue but adjusting that (went from 0.04mm to 0.02mm) and that didn’t help much. I also split the path vertically, so the machine would fill offset one side and then the other but the symmetry still persisted. The machine itself looks good. belt tightness etc.

Worse case scenario I can alter the geometry of the path to compensate for the thickness variation but it doesn’t seem like a true solution. Still pretty new at all this so I’m sure I’m missing something.

Longer 5 20W, Ligthburn 2.0.04, HP Omen Win 11

TEST_WOOD_01.lbrn2 (20.6 KB)

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1393×345 283 KB

2

Use regular fill. Offset fill produces the diagonals in the corners, just the nature of how it works.

2 Likes
3

Heard. Can you shine some light on why though? Or point me where this might be explained? The link you shared doesn’t really get into that.

4

I’ll try to explain. Fill scans back and forth across your project on the x axis, moving 1 line at a time. Offset fill follows the outline of your design, usually from the center out, and it changes direction half way through as well. The best way to understand is to play the preview window and you will see how the 2 modes differ.