Having recently installed a new tube in the k40 and having re-built the head, cleaned and re-aligned everything I can now
Cut 3mm plexiglass at 30% or around 12mA at 8mm/s, but I do it at 7mm/s just to be sure and to smooth the cut a little. I can also do it at 50% or around 16mA at 25mm/s in 2 passes but the finished egdes are slightly ragged. That’s not my problem.
My problem is that I cannot cut through 2mm card stock no matter what I try or do! 30% at 10mm/s it leaves a decent but really burned mark. 20% at 4mm/s, again decent depth but burned. 30% at 60mm/s again, same. Multiple passess SORT OF cut deeper but 2 or even 3 don’t cut through. Before re-alignment and re-build of mirrors and head I was cutting theough the same card stock at 50% doing 25mm/s in 2 passes with really nice clean cuts. Did the slanted piece focus finding, so I’m at around 6mm below the nozzle (I have an air assist nozzle with 50.8 lens in there).
Frustrating. What settings do you use for cutting 2mm thick card stock?