Carving in polycarbonate????

[djh]

I occasionally get a build up of chips on my new 60 degree V-Bit if I have a contour that is long and the bit stays down.  My depth of cut is .023.  The short cuts usually sling it off when it retracts. Is there a general rule about what works best? (ie a faster/slower cut rate or faster/slower router speed) Is there a happy medium?

Thanks,

DJ

[Derek the Admin]

Slower router speed and/or faster feed usually helps. The tool needs to be really sharp. For instance, you wouldn't want to cut MDF with the tool then move it over to a plastic. I try to designate certain end mills in my stash that only get used for plastic so I know they are good and sharp.