-> Do you need to vary the speed "live", or do you just want to change
-> it once in a while? If the latter, you could use stepped pulleys as
-> is done for a drill press.
I'll be using stepped pulleys to drop the speed down anyway, but the
speed control needs to be 'live'. I don't need a whole lot of range
with the speed control, but you have to adjust the speed a bit to
compensate for the load reduction as the stones cut. They only like to
operate across a very narrow speed range; too slow means it takes all
day to remove any metal, too fast means the stones load up and don't cut
any more.
|