How to calibrate Creality 10w laser

[matt3]

Hello
Recently I have bought a Creatlity Falcon 10w laser. I connected with light burn and wanted to engrave something for testing only. I got following results:

I used 100% power and 2000mm speed.
I don’t know where the problem is. There should be perfect squares and cirecles but they are not. Square is 1 mm shorter in Y axis and you can see how circles look like.
Where the problem is? Is it with software or machine assembly (I imported settings for LighBurn from included SD card)? How can I fix it?

[misken (Melvin)]

Go through this guide:
https://diode-laser-wiki.com/documentation/guide-to-mechanical-adjustments/

[matt3]

Thank you. Now it is almost perfect.