table saw motor binding electrical smoke resistance noise jerky....how BAD

Posted by JIMMIE on April 4, 2009, 7:46 pm

> On Sat, 04 Apr 2009 15:55:08 -0800, David Nebenzahl

> >On 4/4/2009 1:29 PM notbob spake thus:

> >>> My table saw motor has gone bad. =A0It was like the blade was binding=

> >>> something, and came to a fast stop when switched off. =A0Then there w=

> >>> significant electrical smoke I had to air out. =A0I unplugged it for =

a day.

> >>> Now when I plug it in and start it it seems as if there is a series o=

f jerky

> >>> electrical resistance spurts, accompanied by a pulsating noise. =A0Li=

ke the

> >>> motor is firing against itself - resisting its own powered rotation b=

> >>> sending quick spurts of electricity power in the wrong direction. =A0=

Rough,

> >>> brief, jerky rotation.
> >> Sounds like might be worn/bad brushes or commutator. =A0How deep are y=

ou willing

> >> to go to save a buck? =A0May be best to jes replace motor.

> >Brushes for a *table saw motor*?
> >Just goes to prove the value of advice you get from Usenet ...

> Yes, many of the 'newer' cheap ones use brushes. Not surprising at
> all.- Hide quoted text -
> - Show quoted text -

They may be full of sawdust?

Jimmie

Posted by ransley on April 4, 2009, 9:35 pm

> On 4/4/2009 1:29 PM notbob spake thus:

> >> My table saw motor has gone bad. =A0It was like the blade was binding =

> >> something, and came to a fast stop when switched off. =A0Then there wa=

> >> significant electrical smoke I had to air out. =A0I unplugged it for a=

day.

> >> Now when I plug it in and start it it seems as if there is a series of=

jerky

> >> electrical resistance spurts, accompanied by a pulsating noise. =A0Lik=

e the

> >> motor is firing against itself - resisting its own powered rotation by
> >> sending quick spurts of electricity power in the wrong direction. =A0R=

ough,

> >> brief, jerky rotation.

> > Sounds like might be worn/bad brushes or commutator. =A0How deep are yo=

u willing

> > to go to save a buck? =A0May be best to jes replace motor.

> Brushes for a *table saw motor*?
> Just goes to prove the value of advice you get from Usenet ...
> --
> Made From Pears: Pretty good chance that the product is at least
> mostly pears.
> Made With Pears: Pretty good chance that pears will be detectable in
> the product.
> Contains Pears: =A0One pear seed per multiple tons of product.
> (with apologies to Dorothy L. Sayers)

So true, your usnet advice is worthless again.

Posted by David Nebenzahl on April 5, 2009, 8:18 pm

On 4/4/2009 5:35 PM ransley spake thus:

>> Brushes for a *table saw motor*?
>> Just goes to prove the value of advice you get from Usenet ...

>
> So true, your usnet advice is worthless again.

At least I can admit when I'm wrong, something I've *never* seen you do
(and boy, are you wrong a lot of the time!).

--
Save the Planet
Kill Yourself

- motto of the Church of Euthanasia (http://www.churchofeuthanasia.org/)

Posted by ransley on April 5, 2009, 10:32 pm

> On 4/4/2009 5:35 PM ransley spake thus:

> >> Brushes for a *table saw motor*?
> >> Just goes to prove the value of advice you get from Usenet ...

> > So true, your usnet advice is worthless again.

> At least I can admit when I'm wrong, something I've *never* seen you do
> (and boy, are you wrong a lot of the time!).
> --
> Save the Planet
> Kill Yourself
> - motto of the Church of Euthanasia (http://www.churchofeuthanasia.org/)

Really, so post them I dont remember any, and your still an ass to
keep it up.

Posted by Bored Borg on April 5, 2009, 2:14 pm

Us few drummers on here all know that using brushes is quieter... and then
started using table saws where brushes means ungodly loud. I couldn't believe
the difference switching from a tabletop brushed motor TS to a "proper"
induction motor. Serious danger of injury from not hearing the motor running.

As to yer busted motor. I''d rip it out and drag it along to the local
washing machine repair place (seriously) and get 'em to check it out and
quite for a recondition/exchange if faulty. They may have brushes to fit or
have a rewind/recondition service on the premises or be able to recommend
their pet service if not. These guys handle fancy multispeed oscillating
reversing motors all day. A TS motor will be child's play for 'em.
If you know of a motor rewinders, try them first, or as well. They'll be able
to tell you if there's a fault to be fixed.

If they don't have to dismantle a machine there'll probably be no charge for
a quick check, or maybe a nominal fee whereas taking the whole thing
somewhere for a strip and check will cost you £25. GBP ?45.00 USD just to
look at it.

Then it's a judgment call - is the repair price worth it?

when you dismantle, the saw may have a left-handed thread (motor on your
right, normal operating position) - or a right handed thread if it's on the
operator's left.

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table saw motor binding electrical smoke resistance noise jerky....how BAD - Page 5