I get weird lines on my rubber engrave with 50W fiber laser, no matter which side i’m engraving, the rubber burns too much on 80% power, and doesn’t engrave on 40%
I tried from 300-8000 mm/s speed
and 20-100% power, nothing seems to work
You need to post the project file (.lbrn2) for us to look at it. If you can’t then post the settings. What is really important is a photo of the issue… what you say and what we think or usually different.
I’ve never tried my fiber on rubber 
These are my settings, i wanted to show yall to how it looks on a square (it engraved perfectly)
then i tried with the text again and it was scuffed as always ;-;
Did you take an Interval Test?
No, i didn’t
To be honest i don’t know what this is, i’m pretty new to this