Fix or throw away
 

Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.


C

Fix or throw away
 

On Apr 17, 5:06*pm, "Clanger" wrote:
Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.

C

Only you can test it to find out what bit's shorting out. We can't.

If its a partial short on the motor it'll be simple to make it work
without even needing to repair. For now, I'd suggest turning the blade
round a bit before restarting it, if it then runs its fairly likely to
be a partial motor short.


NT

Fix or throw away
 

On Sat, 17 Apr 2010 10:27:40 -0700 (PDT), NT
wrote:

On Apr 17, 5:06*pm, "Clanger" wrote:
Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.

C

Only you can test it to find out what bit's shorting out. We can't.

If its a partial short on the motor it'll be simple to make it work
without even needing to repair. For now, I'd suggest turning the blade
round a bit before restarting it, if it then runs its fairly likely to
be a partial motor short.

Yup, I had that on an old washing machine motor. I squeezed another
few months out of it by blowing the carbon out with an airline.

Cheers, T i m

Fix or throw away
 

"Clanger" wrote in message ...
Recently (stupidly) bought a used 10" table saw. Set it up today and did about 3 cuts before it tripped it's inbuilt circuit
breaker.

Reset it and turned it back on, it immediately tripped my main board and does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending anymore money on.

Thanks for any helpful suggestions.


What has tripped on the CU? an MCB or the RCD
Can you remove and inspect the carbon brushes?
Inspect the commutator while they are out.
--
Graham.

%Profound_observation%

Fix or throw away
 

NT explained :
On Apr 17, 5:06*pm, "Clanger" wrote:
Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.

C

Only you can test it to find out what bit's shorting out. We can't.

If its a partial short on the motor it'll be simple to make it work
without even needing to repair. For now, I'd suggest turning the blade
round a bit before restarting it, if it then runs its fairly likely to
be a partial motor short.

No clues were provided as to what types of device actually tripped -
overload, MCB, RCD?

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

Fix or throw away
 

"Harry Bloomfield" wrote in message . uk...
NT explained :
On Apr 17, 5:06 pm, "Clanger" wrote:
Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.

C

Only you can test it to find out what bit's shorting out. We can't.

If its a partial short on the motor it'll be simple to make it work
without even needing to repair. For now, I'd suggest turning the blade
round a bit before restarting it, if it then runs its fairly likely to
be a partial motor short.

No clues were provided as to what types of device actually tripped - overload, MCB, RCD?

I wonder if the "inbuilt circuit breaker" was also an RCD?

--
Graham.

%Profound_observation%

Fix or throw away - more info
 

Clanger wrote in message
...
Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.

Thanks for the replies so far.

The make/model is Performance FMTC10TSW.

When it trips the CU, it trips the whole board and not just the circuit it
is plugged in to.


C

Fix or throw away - more info
 

On Apr 19, 6:56*am, "Clanger" wrote:
Clanger wrote in message

...

Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.

Thanks for the replies so far.

The make/model is Performance FMTC10TSW.

When it trips the CU, it trips the whole board and not just the circuit it
is plugged in to.

C

Almost certanly an RCD trip then, not MCB. Really you need to properly
fault find on it, but if you really cant then a couple things can be
tried:
1. clean away carbon deposits on and aroud the motor very thoroughly
2. swap L & N wires in the plug.
Either might work.


NT

Fix or throw away - more info
 

On Mon, 19 Apr 2010 10:02:51 -0700 (PDT), NT
wrote:


Almost certanly an RCD trip then, not MCB. Really you need to properly
fault find on it, but if you really cant then a couple things can be
tried:
1. clean away carbon deposits on and aroud the motor very thoroughly

As I mentioned previously, that was what 'cured' my first RCD trip
although it may not have been 100% the cause (see below).

2. swap L & N wires in the plug.

My second (some months later) was a partial short from the motor
windings to earth and it would trip the RCD by just plugging it in and
not even turning it on at the wall (and yes my sockets are wired
correctly). ;-)

Cheers, T i m

Fix or throw away - more info
 

After serious thinking Clanger wrote :
When it trips the CU, it trips the whole board and not just the circuit it is
plugged in to.

That sounds like an RCD, is there a test button on the item which
trips?

In which case there is some leakage from L or N to the earth, which
most probably is due to carbon (or moist sawdust) accumulating in the
motor from the motor brushes. Try removing the motor, leaving it for a
while on a warm radiator to dry out, then blowing it out via the vents
with an air line.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

Fix or throw away - more info
 

Clanger wrote in message
om...
Clanger wrote in message
...
Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.

Thanks for the replies so far.

The make/model is Performance FMTC10TSW.

When it trips the CU, it trips the whole board and not just the circuit it
is plugged in to.

Many thanks to you all for the suggestions and advice, it is very much
appreciated.

Probably going to be a week or so until I can follow up on your suggestions
but I will do so and let you all know the outcome.

Thanks again.


C.

Fix or throw away - more info
 

Harry Bloomfield wrote:
After serious thinking Clanger wrote :
When it trips the CU, it trips the whole board and not just the
circuit it is plugged in to.

That sounds like an RCD, is there a test button on the item which
trips?

In which case there is some leakage from L or N to the earth, which
most probably is due to carbon (or moist sawdust) accumulating in the
motor from the motor brushes. Try removing the motor, leaving it for a
while on a warm radiator to dry out, then blowing it out via the vents
with an air line.

Ideal job for WD40


--
Dave - WD40 Liberation Front.

Fix or throw away
 

On Saturday, April 17, 2010 at 5:06:11 PM UTC+1, Clanger wrote:
Recently (stupidly) bought a used 10" table saw. Set it up today and did
about 3 cuts before it tripped it's inbuilt circuit breaker.

Reset it and turned it back on, it immediately tripped my main board and
does so as soon as I try to start it.

Any thoughts as to likely fault so I can determin if it's worth spending
anymore money on.

Thanks for any helpful suggestions.


C
hi try checking the carbon brushes i think you will find that is the cause of your trouble easy to check turn over and remove the bottom cover and you will see the motor there is 2 brushes 1 at each side of the motor use a plane screwdriver to turn the access cover the brush should pop out if they are well worn replace it and same the other side.good luck joe

Fix or throw away