"Adrian Brentnall" adrian-the papers and the wrote
in message ...
HI Roger

Thanks for the reply

On Sat, 13 May 2006 15:51:21 +0100, "Roger Mills"
wrote:

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.

I've uploaded some photos of the motor - they're at
http://www.inspired-glass.co.uk/electric-motor.htm

The little cover over the electrical connections has a schematic which
seems to show a capacitor - would this be the starter capacitor ?

If so - do you know where it is ? - do I have to undo the long bolts
which appear to hold the two end castings together - and then does it
all become clear ??? g (or do I end up with a bag of bits g)

Thanks in advance
Adrian
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Looking at the top picture, is that a shiny wire link between terminals z
and a at the top? If so then its wired as the RHS of the 3rd picture. This
is marked TS 43-58. I assume that this will be stamped on the motor
nameplate. I suspect then that (assuming both above correct) that it will
use a start winding with a centrifugal (spelling??) switch. I guess the
contacts have gone and not powering up the start winding. Follow that bit of
metal coming off the live terminal post, think you may find something there.

Hope I have helped a bit!