Laser position movement while cutting

Hi! I have problem with my Sculpfun S30 Pro. While cutting with few number of passes whole project move in Y axis and ruin it all. What could be a reason for that? It used to happen when laser was cutting for more than 30 min but now it hapeen after just few minutes…

I would check for mechanical issues. Loose set screws, loose head etc.

Go through the mechanical adjustment checklist and you’ll likely find a loose setscrew in a pulley or belt:

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