Control heat with a disciplined starting point
Use the material and tool manufacturer's guidance, then test conservatively. A setting that creates chips and clears them can behave very differently from one that rubs, heats, and melts the edge.
Protect the sheet and hold it flat
Use an appropriate holding method and consider the protective surface where suitable. Avoid a setup that lets a thin sheet chatter, lift, or release near a final cut.
Inspect the chips and edge after each change
Watch for melting, welding, chipping, chatter, and surface scratches. Change one variable at a time and document the successful combination for that exact acrylic and bit.
Shop 101
Turn this guide into a tested shop decision.
You leave with one documented input, one controlled result, and one clearer next action.
- Name the material, dimension, or cost input that affects the decision.
- Use the guide and calculator to make the assumption visible.
- Test or compare the result before committing final material, time, or client scope.
Related tools & lessons
Common questions
Why does acrylic melt on a CNC?
Heat can build when the bit rubs instead of making and clearing chips. Bit geometry, feed, RPM, depth, tool condition, and chip clearing all affect the result.
Can I use wood CNC settings for acrylic?
Do not assume so. Acrylic has different heat and chip behavior. Start from material and tooling guidance, then test on matching scrap.
Should I leave protective film on acrylic?
Follow the material supplier's guidance and test the full process. The film can protect surfaces in some operations, but it also changes what is present at the cut.