How to Cut Acrylic on the Wolfpawn 4040 Pro Without Melting

How to Cut Acrylic on the Wolfpawn 4040 Pro Without Melting Acrylic melts and re-welds itself if you get the settings wrong. The fix is a single-flute O-flute bit and the right combination of speed and RPM. Why Acrylic Melts Acrylic's melting point is around 160°C. Multi-flute bits generate more heat per pass and don't clear chips fast enough. Chips get recut and friction builds. Single-flute O-flute bits cut once per revolution and eject chips efficiently. Recommended Tooling 1/8" single-flute O-flute upcut — the correct bit for acrylic on a desktop CNC No substitute — 2-flute bits will melt unless settings are very conservative Settings Hold-Down Acrylic must be perfectly flat: Leave protective film on during cutting — it grips to double-sided tape and protects surface Use tape AND clamps for pieces over 100 mm Vibration causes chatter marks — secure well Signs You're Melting White powdery residue = correct (chips) Gummy, stringy material re-attaching to cut = too slow/too hot Melted balls on surface = feed too slow or RPM too high If melting starts: increase feed rate, reduce RPM slightly, ensure single-flute bit. Clear vs Colored vs Cast vs Extruded Cast acrylic cuts better — cleaner edge Extruded acrylic is cheaper but edges can micro-crack Colored acrylic cuts same as clear — settings unchanged Mirrored acrylic — remove backing film after cutting (not before) Finishing Cut Edges Light sanding with 400+ grit to remove tool marks Flame polish for clear acrylic edges — propane or butane torch, quick pass Scrape with a cabinet scraper for a polished look without flame

Related Guides

Loading_