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?
10K sounds too fast- try 1K. Don't know what end mill you're using, but you would probably get best results with a two fluted one rather than more flutes- lets the chips clear rather than melting them.
You should get away with no coolant, just air to clear the chips. Hope this helps!
I love deadlines- I like the whooshing sound they make as they fly by.