I am new to CNC and I am trying to engrave acrylic. I am doing small letters about .2" tall. I am using a small 'D' type V bit with a .01 tip and 50 deg angle. I have problems with heat build up and gumming up bits. My router will run from 1000 rpm up. I am cutting about .01 deep. I've tried multiple passes, light oil and water for lube. I've tried IPM from 8 to 20.
Still I am not getting 100% good engraving.
Any suggestions would be great.
Larry Naumann