[GreenKeys] motor problems

[drlegendre .]

Brad,

While it was discussed, I don't recall if you mentioned whether or not you
had a Variac - or other power-limiting device? If so, just bypass the fuse
with a 10A AC Ammeter and see what happens when you start applying some
power.

Did the 'old' motor ever run for a second before taking the fuse? Did it
ever move at all?

On Fri, Nov 4, 2016 at 8:05 PM, Brad via GreenKeys <
greenkeys at mailman.qth.net> wrote:

> I ended up getting the 'new' motor installed ok.. but with only a 3A fast
> blow fuse it ran for only about a second before blowing.  Slow blow fuses
> should arrive tomorrow or Monday according to the mail.
>
> -----Original Message-----
> From: GreenKeys [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of
> Jeffrey D Angus
> Sent: Friday, November 4, 2016 5:59 PM
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] motor problems
>
> On 11/4/2016 7:21 PM, Brad via GreenKeys wrote:
> > There is definitely a difference.  Whereas the new one spins freely
> > (and keeps spinning a while when you manually spin it from the shaft),
> > the other one, even with all the load off, still is sticky and
> > requires more force to turn.
> And example of how some motors have odd "not intuitively obvious"
> problems.
> When I worked at Junior's Tools, one of the things I had to fix were the
> small "oil less" compressors. They apparently, all had the same motors from
> Italy regardless of who's name was on the label.
> Typically, they had the main body, and two ends held together with long
> bolts. Occasionally we would get one with the starting capacitor bad. But
> almost always what was wrong was the ends were shifted in position. (The
> feet were no long flat.) The quick test was to un-bolt the motor. If it
> rocked on the work bench, loosen the ends and realign them.
> That solved 99% of the "It blows the breaker" complaints.
> <http://static.ibsrv.net/car-repair/air-compressor.jpg>
> Now the weird part about it was, there wasn't the slightest bit of binding
> or stiffness to the motor when it was out of alignment, but it it was, the
> motor would lock the rotor and blow the breaker.
>
>
> --
> Jeff-1.0
> wa6fwi
> http://www.foxsmercantile.com
>
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