Electrical Engineering - Re: Jet 1442 Problem

Author

Re: Jet 1442 Problem - FOLLOW UP

Joe

2007-03-16, 1:25 pm

Everyone,

Thank you for your responses. I've learned a lot and taken a lot of advice.

I opened up part of the motor today. Here's what I found:

Inside is immaculate, which I would have expected for a TEFC (hence the TE)
I now have an understanding of how the centrifigal switch operates, it was
operating smoothly, no fusing, no dust, no problem.
HOWEVER,
you almost have to see this to believe it. I posted two pics in
alt.binaries.pictures.woodworking.

A piece which should have been installed on the shaft was rumbling loose in
there. There's no way it ever made it on the shaft during manufacturing.

The only amazing part is that this thing ever ran while plugged into a gfi.
I guess eventually this piece contacted the housing and caused the short.

I'm going to put it back together and see if it runs without this piece and,
of course, I'll be following up with JET. Even if the warranty period is
out, this is a definate manufacturing defect.

I'll keep everyone posted with what Jet does.

Thanks again,

Joe C.

Mike Berger

2007-03-16, 1:25 pm

Let's assume that it runs correctly when you reassemble it. What do
you want Jet to do?

Joe wrote:
....
> I'm going to put it back together and see if it runs without this piece and,
> of course, I'll be following up with JET. Even if the warranty period is
> out, this is a definate manufacturing defect.
>
> I'll keep everyone posted with what Jet does.
>
> Thanks again,
>
> Joe C.
>
>

Joe

2007-03-16, 1:25 pm

>
> Joe wrote:
> ...

"Mike Berger" <berger@shout.net> wrote in message
news:etedgs$35j$3@roundup.shout.net...[color=darkred]
> Let's assume that it runs correctly when you reassemble it. What do
> you want Jet to do?

If it runs correctly, nothing. Why would I want them to do anything?

I called them to learn more about this extraneous piece and how critical it
is. They were very helpful by the way and said to call them if the motor
doesn't run after I put it back together and they would try to help me out
even though the motor (and the entire lathe, for that matter) is out of
warranty.

It was certainly worth the call.

Joe C.

Long Ranger

2007-03-16, 1:25 pm

"Mike Berger" <berger@shout.net> wrote in message
news:etedgs$35j$3@roundup.shout.net...
> Let's assume that it runs correctly when you reassemble it. What do
> you want Jet to do?

How about something along the lines of supplying a motor that doesn't have
this flaw? After all, it has caused the lathe to be inoperable and now we
have a part missing from the motor that we don't understand the function of,
which may or may not be of critical importance to the safe, reliable
functioning of the motor. Also, damage to the motor may have occurred as a
result of this part flopping around loose, which may have severely shortened
the usable life of the motor, especially the windings.

George

2007-03-16, 1:25 pm

"Joe" <in@valid.com> wrote in message
news:g3zKh.13411$G23.12894@newsreading01.news.tds.net...
> If it runs correctly, nothing. Why would I want them to do anything?
>

Because you'd always be waiting for the other shoe to drop. The piece came
from somewhere, perhaps somewhere structural. Failure could come without
notice. Accidental success is the bane of every repairman's existence.

I'm in a similar circumstance myself, having assembled my new drillpress
with two long bolts left over. Though identified in the materials list,
there were no instructions as to where to put them. It seems to run right,
but why would anyone cost-conscious include extra hardware? Waiting for an
answer from them.

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