Machining plastics with CNC

[Ben Mitchell]

Application could best be described as a floor mat. Tolerance is as small as possible - less than a millimeter would be fine.

I've actually ran samples of Azek through, and it worked ok, but the texture is filled with little bubbles that gives it a mottled surface, I'm looking for more of a smooth surface.

To give some more detail - I'm making round bumps on a surface. The surface material does not need to support people.

Between roughing and finishing passes I let the machine cool down. In addition, I had two vacuums running - one pulling air away from the bit, another pulling air out of the machine (it's shaped like a closed box, which makes it essentially designed to trap heat.