Re: [CAD_CAM_EDM_DRO] Re: VFD drive problems with older 3 phase motor?

On my 10HP motor, I couldn't spin it fast enough by hand (or foot) to get it
going; I had to tie a rope around the shaft and pull to get it going fast enough,
then apply 220VAC to two of the phases. After about 5 seconds, it was spinning
smoothly, and then I could connect the 3 HP 3 phase motor on my mill to the
3 phases.

- Steven Ciciora

<snip>

>You can just give the motor a good spin by hand and then plug any 2 of
>the phase wires in to 240 V power. If it hums loudly and stops, something

>is wrong with the wiring or motor. If it accelerates slowly to
>operating speed
>(1 - 2 seconds) then you have it right. (It will accelerate faster with
>proper
>voltages on all 3 phases.)

</snip>