In an earlier contribution to this discussion,
Adrian Brentnall adrian-the papers and the wrote:

Hi All

Until last week I was using a little (probably 1/3hp) electric motor
to power a combination diamond saw / grinder / polisher unit. I guess
that the original motor was ex an old washing machine.

Anyway - last week, said motor gave a gasp and died. Now all it will
do is buzz weakly - and won't turn - mains lights in the workshop dim
while it's buzzing (not a good sign, I think).

So - bright idea time !
Saw something on the web about using a cheapie bench grinder as a
motor - found one in Homebase, and lo & behold the pulley fitted in
place of the grinding wheel. Result !

Sadly not - the new little motor is perfectly happy to spin its own
grinding wheels - but refuses to start when faced with the effort of
spinning the combination unit - it now sits and buzzes weakly.....
darn !

The new thing's rated at 150Watts - which is probably a bit on the
light side - but any idea why it'll happily spin up its own wheels but
not my combo unit....?

Alternatively - what's the chance or fixing the old motor - no magic
smoke escaped - so I'm hopeful.... g


Does the original motor have a starter capacitor? If so, there's a fair
chance that that's failed, and gone something akin to short circuit. If you
replace that, the motor will probably work.
--
Cheers,
Roger
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