... for clear acrylic with 4mm thickness you'll need a CO2-laser with at least 10Watts of power -- but the cheap chinese glass-tube-lasers starts at 40 Watts.
Search in fleabay for "CO2 laser" ...
Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [
reprap.org] -- Deutsche Facebook-Gruppe - [
www.facebook.com]
Call for the project "garbage-free seas" - [
reprap.org]