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Old 07-28-2010, 06:51 PM   #6
cinqster
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Re: Plastic on CNC machine?

Quote:
Originally Posted by GTmike400 View Post
Quite the contrary in my experience. I usually machine plastics (delrin, HPDE, acyrlic, ABS, polyurethane) at high RPM (3000+) on full rapid. Any slower and I get crappy surface finish due to melting.
Yikes...that's a weird one Mike!

I can only guess that the melting is occurring because the cutting tool is getting hot? Try a very slow speed if you haven't done so already, you may find a cooler tool cuts better. I've found the same thing with cutting plastic sheet with a hand saw. Slow is good...get too fast and the blade sticks.
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