snipHowever, I have never found the slowest belt settings to be much
use. My
feeling is that the last two pulleys on the motor shaft are way too
small and they do not create enough 'bite' to be able to drive the belt

without slipping.snip

I do find the slowest setting to be very useful. Especially with
large, somewhat out of true blanks. I've never experienced slipping
and I only snug the belt down. I've never had a problem. Perhaps
you're trying to take too much off at a time or your edge isn't sharp
enough.