Go back to the charts I posted, which will tel you about 180ipm at 18000 rpm. You asked what would be best, and that's it. At 8ipm, there's not much you can do. Doing the math, you should be spinning the cutter at 800rpm. But at that speed, the bit will probably break and the cut quality would be very poor.
As for light cuts, that's probably your best bet. Start at 1/32" per pass and increase to find what works best for your machine.
__________________
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |