Quote Originally Posted by JAZZCNC View Post
Usually if your smoking it's because your feeds are too low rather than spindle speeds being too high.

What size cutters are you using and in what material.? Give us some idea of the feeds n speeds your using.

Also, the machine makes a BIG difference because if your machine can't handle the loads or travel fast enough to cut correctly then you always going to struggle. This is why Feeds n speeds calculators don't often work for DIY machines as they assume an industrial spec machine is used.
Material is chipboard (just to practice on) RPM I have varied from 10,000 to 24000 (max) machine is a C-Beam from Open Builds