"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
. 3.70...

I agree: You don't need large idler motors. As you say, ganged
smaller
motors can work, too. But large or small, they all take up more
space
than a decent VFD.

Lloyd

How about using a machine tool running unloaded, such as a pedestal
grinder, as the rotary converter for other motors?

jsw