Ray:
Single phase induction motors cannot be speed controlled very well and
in any event you will not be able to reduce speed enough and still have
power for steel. You are out of luck unless you want to make major mods
to the drive system.

Jim

Ray Field wrote:
Thank you to all that replied, your comments are very helpful.
Machine is direct drive from an induction motor, will try an electronic
speed controller to see if it works first.
Materials that would be cut are aluminum up to 1/4", brass to 3/16", steel
to 1/16". Any suggestions on TPI for these metals?
On scarf joints, what angle, 30 degrees (long scarf). Any suggestions on
grinding blade to that angle?
Ray, still in the sun, with ornamental cherry blossoms.