Mirroring is written into the coordinates

NoticeWorth knowing about the file you get back. It never stops a conversion.

What the converter says

the mirror setting is not written: every coordinate is written as the machine reaches it

Code: gcode_mirror_absorbed

What triggers it

The source program turned mirroring on for some of its moves. G-code has no portable word for that, but it does not need one: every coordinate in the file is already the one the machine reaches, so the mirrored moves come out as plain moves.

SX1
G0 X=100 Y=100 Z=6 T43
G1 X=200 Y=100

Example that triggers it

How to fix it

Nothing to fix. Check the drawing to see the part the machine will cut, which is the handed version where the source mirrored.

Applies to

Messages this command can produce