To test out my CNC, I don’t really want to buy lots of very expensive materials, so I was looking around the house for some plastic. The best thing I found was a plastic cutting board from Ikea, which has been heavily used for many years and can be replaced really cheaply. So here’s a picture of the result, milling an R into the cutting board. The R is about 5cm tall, and I’m quite pleased with the quality. See the middle of the R, where the CAM-processor decided to flatten out the surface (on my request). There is a groove along the side of the R, which may seem like a failure, but that was as programmed by the CAM.
And here’s a screenshot from the control program (ChiliPeppr) of the R and the paths the CNC followed.