I had this laser for a year and it was not cutting properly, so i redesigned Y, need to change belts, beef up motors etc, but thats different story (major resonance, bad arc cuts etc…).
As for frequencies… Today i read an article that cutting PETG you need to lower frequencies to 2-3khz, same as with paper. Less charring/less burning, kinda like perforation mode(which i’m yet to try in LB). I did run my machine at lowest 2khz allowed in LB (at the time i tried, maybe it changed) and it worked wonders on heavy paper, but i couldnt keep cuts straight due to machanical shenanigans (resonance in arcs and off-90-degree cuts).
Just asking for general experiences with PETG and maybe some on point advice about this specific material.
#Edit# It is a glass tube, DCWG 100W peak (80W sustained). Normal operation of CO2 lasers today defaults to 20kHz.
#Edit2# Article i read: http://www.plasticsmag.com/ta.asp?aid=4770