Hi Group, I've got to put my turning on hold. I just lost the motor on
my Jet lathe. It had a problem when I bought it you had to spin it to
start it so I took it in to have it looked at and had a new capicitor
put on. When I was using it yesterday it quit so I took it back to the
electric shop and they replaced the capicitor again and run the tests
on it again. It worked fine for a minute then tripped their breaker.
It's got a fault in it somewhere that's probably why the capacitor was
disconnected and it had to be spin started. Fortunately a new motor
isn't too pricey if you say it fast. If I had know for sure the motor
was bad I would have put the cost of the repair toward a new motor but
even with a new motor the lathe was still much cheaper than a new one.
Jim in ID
--

On Tue, 10 Jan 2012 10:09:20 -0600, James wrote
(in message ):


Hi Group, I've got to put my turning on hold. I just lost the motor on
my Jet lathe. It had a problem when I bought it you had to spin it to
start it so I took it in to have it looked at and had a new capicitor
put on. When I was using it yesterday it quit so I took it back to the
electric shop and they replaced the capicitor again and run the tests
on it again. It worked fine for a minute then tripped their breaker.
It's got a fault in it somewhere that's probably why the capacitor was
disconnected and it had to be spin started. Fortunately a new motor
isn't too pricey if you say it fast. If I had know for sure the motor
was bad I would have put the cost of the repair toward a new motor but
even with a new motor the lathe was still much cheaper than a new one.
Jim in ID


Did the motor make a loud humming/buzzing noise? Is the motor a single speed
motor? If yes to both of these questions, it is likely the case that you have
a split-phase motor. That is, it is an induction motor with starting windings
and an internal centrifugal switch that opens the circuit to the starting
windings once the motor gets up to about 70% of its normal speed. The
starting windings are a *relatively* high resistance, compared to the main
running windings, and the capacitor is used as part of the starting winding
circuit to provide a much higher starting torque. When the motor seemed to
work with a new capacitor - and then did not start again after the capacitor
burned out, suggests to me a partially shorted coil in one of the starting
windings. This would cause a very high starting current and a much diminished
starting torque - even with the capacitor. The high currents burned out the
capacitor. If this is the case the only remedy for this motor is rewinding
the starting coils, a prohibitively high expense in this day of automated
coil winding in new motor manufacture. (I did some of this kind of work in
trade school 45+ years ago.) A fresh motor is indeed called for. When you get
the new motor, if it is a split phase motor, have your local shop install a
4-way switch on the starting windings, so your motor will be reversible. If
they say it can't be done, go to a new shop or contact me for instructions.
tom koehler

--
I will find a way or make one.

tom koehler wrote in
net.net:

On Tue, 10 Jan 2012 10:09:20 -0600, James wrote
(in message ):


Hi Group, I've got to put my turning on hold. I just lost the motor
on my Jet lathe. It had a problem when I bought it you had to spin it
to start it so I took it in to have it looked at and had a new
capicitor put on. When I was using it yesterday it quit so I took it
back to the electric shop and they replaced the capicitor again and
run the tests on it again. It worked fine for a minute then tripped
their breaker. It's got a fault in it somewhere that's probably why
the capacitor was disconnected and it had to be spin started.
Fortunately a new motor isn't too pricey if you say it fast. If I had
know for sure the motor was bad I would have put the cost of the
repair toward a new motor but even with a new motor the lathe was
still much cheaper than a new one. Jim in ID


Did the motor make a loud humming/buzzing noise? Is the motor a single
speed motor? If yes to both of these questions, it is likely the case
that you have a split-phase motor. That is, it is an induction motor
with starting windings and an internal centrifugal switch that opens
the circuit to the starting windings once the motor gets up to about
70% of its normal speed. The starting windings are a *relatively* high
resistance, compared to the main running windings, and the capacitor
is used as part of the starting winding circuit to provide a much
higher starting torque. When the motor seemed to work with a new
capacitor - and then did not start again after the capacitor burned
out, suggests to me a partially shorted coil in one of the starting
windings. This would cause a very high starting current and a much
diminished starting torque - even with the capacitor. The high
currents burned out the capacitor. If this is the case the only remedy
for this motor is rewinding the starting coils, a prohibitively high
expense in this day of automated coil winding in new motor
manufacture. (I did some of this kind of work in trade school 45+
years ago.) A fresh motor is indeed called for. When you get the new
motor, if it is a split phase motor, have your local shop install a
4-way switch on the starting windings, so your motor will be
reversible. If they say it can't be done, go to a new shop or contact
me for instructions. tom koehler


It's off of a Jet JWL 1236. Here'e the spec's on the motor TEFC, 3/4HP,
1PH, 115V Only, 60Hz, 8A, 1720 RPM What's the advantage of reversible?
The shop I used has been in business forever and knows what they're
doing. I also use another one who has bee around a long time.When I get
the new motor I'll look into it. Jim

On Tue, 10 Jan 2012 16:38:29 -0600, James wrote
(in message ):

tom koehler wrote in
net.net:

On Tue, 10 Jan 2012 10:09:20 -0600, James wrote
(in message ):
A fresh motor is indeed called for. When you get the new
motor, if it is a split phase motor, have your local shop install a
4-way switch on the starting windings, so your motor will be
reversible. If they say it can't be done, go to a new shop or contact
me for instructions. tom koehler


It's off of a Jet JWL 1236. Here'e the spec's on the motor TEFC, 3/4HP,
1PH, 115V Only, 60Hz, 8A, 1720 RPM What's the advantage of reversible?
The shop I used has been in business forever and knows what they're
doing. I also use another one who has bee around a long time.When I get
the new motor I'll look into it. Jim

Yeah - you have a split phase motor.
A reversible lathe allows convenient sanding in both directions - more gooder
(that's a technical term) than just sanding in one direction. With a split
phase motor, you stop the motor and let it coast down to a stop, then reverse
it and restart. Got to allow the centrifugal switch to reset.
tom koehler

--
I will find a way or make one.

On 1/10/2012 8:09 AM, James wrote:

Hi Group, I've got to put my turning on hold. I just lost the motor on
my Jet lathe. It had a problem when I bought it you had to spin it to
start it so I took it in to have it looked at and had a new capicitor
put on. When I was using it yesterday it quit so I took it back to the
electric shop and they replaced the capicitor again and run the tests
on it again. It worked fine for a minute then tripped their breaker.
It's got a fault in it somewhere that's probably why the capacitor was
disconnected and it had to be spin started. Fortunately a new motor
isn't too pricey if you say it fast. If I had know for sure the motor
was bad I would have put the cost of the repair toward a new motor but
even with a new motor the lathe was still much cheaper than a new one.
Jim in ID

if you are willing to do so, you will be well served by replacing that
jet motor with an older washing machine motor - they can be had for $5
or so, are about 1/3 to 1/2 hp and will serve you better - but they are
bigger (real horses, not smaller Jet horses) so typically you will need
to make a bracket and use a longer belt. You could even get a real 3/4
hp motor for about $50 (new surplus) if you wanted it. I use a 1/4 hp
washing machine motor on my Nova Commet and it is just fine.

Bill wrote:

On 1/10/2012 8:09 AM, James wrote:

Hi Group, I've got to put my turning on hold. I just lost the motor
on my Jet lathe. It had a problem when I bought it you had to spin
it to start it so I took it in to have it looked at and had a new
capicitor put on. When I was using it yesterday it quit so I took
it back to the electric shop and they replaced the capicitor again
and run the tests on it again. It worked fine for a minute then
tripped their breaker. It's got a fault in it somewhere that's
probably why the capacitor was disconnected and it had to be spin
started. Fortunately a new motor isn't too pricey if you say it
fast. If I had know for sure the motor was bad I would have put the
cost of the repair toward a new motor but even with a new motor the
lathe was still much cheaper than a new one. Jim in ID

if you are willing to do so, you will be well served by replacing
that jet motor with an older washing machine motor - they can be had
for $5 or so, are about 1/3 to 1/2 hp and will serve you better - but
they are bigger (real horses, not smaller Jet horses) so typically
you will need to make a bracket and use a longer belt. You could
even get a real 3/4 hp motor for about $50 (new surplus) if you
wanted it. I use a 1/4 hp washing machine motor on my Nova Commet
and it is just fine.

I pretty much have to stick to the Jet motor because of the design of
this model but I will look into a reversing switch. Jim

--

On 01/11/2012 08:22 AM, James wrote:
Bill wrote:

On 1/10/2012 8:09 AM, James wrote:

Hi Group, I've got to put my turning on hold. I just lost the motor
on my Jet lathe. It had a problem when I bought it you had to spin
it to start it so I took it in to have it looked at and had a new
capicitor put on. When I was using it yesterday it quit so I took
it back to the electric shop and they replaced the capicitor again
and run the tests on it again. It worked fine for a minute then
tripped their breaker. It's got a fault in it somewhere that's
probably why the capacitor was disconnected and it had to be spin
started. Fortunately a new motor isn't too pricey if you say it
fast. If I had know for sure the motor was bad I would have put the
cost of the repair toward a new motor but even with a new motor the
lathe was still much cheaper than a new one. Jim in ID

if you are willing to do so, you will be well served by replacing
that jet motor with an older washing machine motor - they can be had
for $5 or so, are about 1/3 to 1/2 hp and will serve you better - but
they are bigger (real horses, not smaller Jet horses) so typically
you will need to make a bracket and use a longer belt. You could
even get a real 3/4 hp motor for about $50 (new surplus) if you
wanted it. I use a 1/4 hp washing machine motor on my Nova Commet
and it is just fine.

I pretty much have to stick to the Jet motor because of the design of
this model but I will look into a reversing switch. Jim

There was an article in either the Dec or Oct issue of American
Woodturner (AAW journal) on installing a reversing switch IIRC. Looked
pretty straight forward...

....Kevin
--
Kevin Miller
Juneau, Alaska
http://www.alaska.net/~atftb
"In the history of the world, no one has ever washed a rented car."
- Lawrence Summers

.. I pretty much have to stick to the Jet motor because of the design of
this model but I will look into a reversing switch. Jim

There was an article in either the Dec or Oct issue of American
Woodturner (AAW journal) on installing a reversing switch IIRC. Looked
pretty straight forward...

...Kevin
--
Kevin Miller
Juneau, Alaska
http://www.alaska.net/~atftb
"In the history of the world, no one has ever washed a rented car."
- Lawrence Summers

OK, I'm pretty dense here, I can appreciate the concept of sanding
with the work turning in reverse, but in my case, the chuck is apt
to spin off the spindle and shoot out the door, carrying my nearly
finished art work with it. I give you that it might be easier to find my
shiny Nova chuck out in the weeds and blackberry bramble, but the
rusty old Grizzly might be lost forever. Stronger door?

Old Chief Lynn

coffelt2 wrote:
. I pretty much have to stick to the Jet motor because of the design of
this model but I will look into a reversing switch. Jim

There was an article in either the Dec or Oct issue of American
Woodturner (AAW journal) on installing a reversing switch IIRC. Looked
pretty straight forward...

...Kevin
--
Kevin Miller
Juneau, Alaska
http://www.alaska.net/~atftb
"In the history of the world, no one has ever washed a rented car."
- Lawrence Summers

OK, I'm pretty dense here, I can appreciate the concept of sanding
with the work turning in reverse, but in my case, the chuck is apt
to spin off the spindle and shoot out the door, carrying my nearly
finished art work with it. I give you that it might be easier to find my
shiny Nova chuck out in the weeds and blackberry bramble, but the
rusty old Grizzly might be lost forever. Stronger door?

Old Chief Lynn

Mine is reversible, and at usually slow sanding speeds the chuck has
never come off. If you want to actually turn in reverse, the last two
Nova chuck inserts I bought have a set screw that is located so that
it impacts the shaft past the threads.

I seldom use the set screw since the time I forgot to loosen it and
tried to take the chuck off. Little file work on the first thread
fixed that mistake.

--
Gerald Ross

I'm so poor I can't even pay attention.

On 01/11/2012 09:12 PM, coffelt2 wrote:
. I pretty much have to stick to the Jet motor because of the design of
this model but I will look into a reversing switch. Jim

Just get in the habit of turning the speed down before reversing. Then
slowly bringing the speed back up. Usually my chucks are on really
tight so don't spin off, but sometimes they do. I usually have a
tailstock up when that happens though so the piece can't really go anywhere.

After you've had reverse for a while you'll wonder how you ever got on
w/o it...

....Kevin
--
Kevin Miller
Juneau, Alaska
http://www.alaska.net/~atftb
"In the history of the world, no one has ever washed a rented car."
- Lawrence Summers

At the motor shop - do they re-wind and re-build old motors ?

IF so - have it fixed.

Martin

On 1/10/2012 10:09 AM, James wrote:

Hi Group, I've got to put my turning on hold. I just lost the motor on
my Jet lathe. It had a problem when I bought it you had to spin it to
start it so I took it in to have it looked at and had a new capicitor
put on. When I was using it yesterday it quit so I took it back to the
electric shop and they replaced the capicitor again and run the tests
on it again. It worked fine for a minute then tripped their breaker.
It's got a fault in it somewhere that's probably why the capacitor was
disconnected and it had to be spin started. Fortunately a new motor
isn't too pricey if you say it fast. If I had know for sure the motor
was bad I would have put the cost of the repair toward a new motor but
even with a new motor the lathe was still much cheaper than a new one.
Jim in ID