Maybe a portable AC unit piping cold air directly into the 'working area' of the laser to keep the material cooler than room temp. Suggestion: I would try to keep the 'zap' zone as cool as possible to prevent long term melting. Quick, very strong, and varying the zones to allow cooling contribute to cutting the paper-foam-paper layers. When watching FT show, their laser is moving pretty fast during the cut-outs on several of the episodes. I guess my first question is, is a 20W laser powerful enough to get through the paper-foam-paper DTFB ?
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