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Hey everyone. 

I am new to lasers and got my Xtool P2 last week. 

I am trying some engraving on mirror's backside.

I did couple of projects and they both had same problem. there are few spots along x axis which the laser skipped which rendered my projects useless. 

I am using 30 power @ 185 speed with 140 lines per inches. which i think is okay since it engraves most of the parts well. 

Does anyone know what is causing this and how i can fix this problem. 

Thanks. attached images for reference.