Scales problems when switching machine into lightburn

Hi everyone,

I’m new into using lightburn and I apologies by advance if my problem is a nOOb’s one…

I’m trying to make walnut coasters inlayed with brass logo inside. I have a Falcon A1 10w and a Geweike G2 20w with lightburn pro (windows).

I’m carving my coaster with my lightburn file and I switch the laser to cut my bass parts still using this file. (thank you so much @Aaron.F for your library, you save me from hundred hours of tries…)

The problem is the brass don’t fit the coaster because the scale isn’t the same…

What am I doing wrong ?

Thank you for all the help you will provide me !

(Sorry for the bad foreigner English… ^^)

If it is a problem where the brass just doesn’t fit quite right, a little too loose in the inlay or just too tight to insert, then it is a kerf issue. If the inlay is definitely scaled larger or smaller, than it’s most likely a calibration issue between your machines. Start by engraving a 100mm square on each machine and carefully measure both directions as well as diagonally. The horizontal and vertical measurements should be exactly 100mm, if not you must calibrate your machine. Also the diagonals should be identical in both directions an an individual square, if they are not, the square is not at a right angle.

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Thank you so much Tim for this hint.
As you said it’s not a kerf issue as the inlay is longer than it should be.
So I’ll try as soon as possible the squares and I’ll come back here to give you the result. :+1:

I followed your advises and made the square test. The scale trouble came from my fiber laser. I changed the settings in LightBurn and it seems that the dimensions are now correct. I’ll try to cut my inlayed piece this weekend and hope it will fit perfectly.

Thanks again for your help @thelmuth !