New S1 user here.    I am experimenting with all of the functions of the S1 machine to understand its limits and mine as a new user.    I am wondering if anyone has tried to laser engrave the bill of a ball cap?  Since I am not 100% sure what its made of, I am assuming some sort of cardboard covered in cotton fabric.    I understand from many boards that you can laser directly onto the cotton part of the ball cap.   Has anyone tried this as well?

If so, would you be willing to share your experience and or custom settings used to not catch the fabric on fire :) 

TIA