Sorry if the text is badly written but I speak French. I’m new at machining. I’m trying to make eyeglasses frames with cellulose acetate. However, I have a major problem. I can’t get a precise cut. As soon as the bit sinks a millimetre into the material, the plastic heats up and becomes completely soft. It is then very difficult for the bit to finish the job and the result is very bad. I changed the speed, the size of the bit, the rotation speed of the bit, etc. There is nothing to do. I use 3.1 mm O flute bit. Do you have any suggestions? Do you know the right cutting speed, rpm, etc.? Thank you in advance.
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