I have a 100W chinese laser cutter.
I’m having issues when I want to cut thick plexiglass. Thick means 1cm.
When I cut it, I use the following parameters:
- speed : 5 mm/s
- power: 65%
I put the plexiglass on spacers (5mm thick) so it doesn’t lay directly on the cutting bed (which is quite dirty, due to many MDF and plywood cuts). The laser get through the plexi, but I get burning stains on the lower side (I’ll show a picture very soon).
I believe they are caused by some gas created by the laser and pushed down by the blowing system, and which take fire underneath the plexi.
Do you think it is the correct explanation, and how can I avoid this?