I posted this once but I guess I didn't stick.
I'm trying to mill some plastic for my kid's science project. It's plastic from a CD case. My Taig 2019 is set to around 10k RPM. Before I get to the end of the contour, so much plastic has melted onto my endmill that the part is useless.
I've gone up to 30 IPM which is too fast because the plastic shatters. Do I just need to reduce the spindle speed? How many RPMs will avoid melted plastic?