How To CNC Machine POM Plastic?
POM pieces can generally be machined in one of two methods. The first is using standard machining methods. A pre-machined POM item can be annealed as the second technique.
To machine POM, The first step in the process would be generating a CAD file of the part and then converting it into CAM for further conversion into G-code, which CNC machines can work with. Then, the next step is cutting the POM workpiece into specific sizes for easy placement on the machine bed. After cutting the POM workpiece to size, place it on the machine bed and hold it using a fixture, so it doesn’t move during machining.

It is important to ensure that the POM workpiece is affixed firmly in place, as the CNC cutting tools move using pre-set coordinates, and any change in positioning or alignment of the workpiece would influence part quality negatively.
After making sure that the POM workpiece is stable, use professional cutting tools affixed to the CNC machine to remove materials from the workpiece. The recommended cutting tool is a universal flat-end mill, as it offers more efficiency when machining plastics.
Finally, it is important you vacuum the CNC machine often when machining POM. This ensures that the chips from the material do not clog the end mill.