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Post by the_viffer on Oct 22, 2006 8:43:56 GMT
The motor on my die filer tripped the circuit breaker. There is low resistance between the earth and the power terminals. It is a very ancient Crompton Parkinson, Chelmsford 1/3hp motor I think split phase as there are only 2 terminals and an earth and no sound of a centrifugal switch. I assume next stop is the workshop in the sky but if anyone has any ideas please let me know.
I've also a 1/2hp GEC capacitor start which I think runs only on the start winding. In any event it runs only at a trot and isn't even 1/2 shetland pony power. Again there is no sound of a centrifugal switch. Any ideas
Assuming both are scrap is the price of metal such that it is worth weighing them in or should they just go to the council metal reclamation?
Thanks
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Post by Tel on Oct 22, 2006 9:44:14 GMT
They make good door stops Fingers.
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Post by chris vine on Oct 22, 2006 11:17:43 GMT
Hi T-V,
Motors, Here are some thoughts..
If you can't hear the centrifugal switch, it is possible that it is gummed up with old muck and has probably stayed in the off position. This would mean that the starting winding was not bought into play and the motor would just creep round (maybe). It can be either the switch which is jammed or maybe the little centrifugal thingummy on the back of the armature.
If there is a low resistance between earth and a winding, it is probably dud, but check that there is no build up of iron filings around the terminals (on either side of the insulator) as this could give problems.
I had one motor which seemed to have seized up solid, on a super 7. It turned out to be iron dust which had built up between the rotor and stator until it had filled the gap. It only needed wiping off to be back to "good as new".....
Have fun and wear rubber gloves and boots!
Serious note: I was once told by a TV (not T-V) repair man that it is a good idea, when poking around in high voltage places, to keep one hand in your pocket. That way, if you touch some high voltage part it doesn't have anywhere to go, especially if you are standing on a dry surface in rubber shoes. The problem is that usually your other hand is touching something earthed, eg the bench or the chassis of the telly. Then the high voltage goes up one arm and down t'other, taking in a wee tour of your heart.....
Chris.
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Post by houstonceng on Oct 22, 2006 12:31:53 GMT
Hey viffer.
IIRC you said you were only "around the corner from me". Don't know eaxctly waht you mean by that but - if you're within a few miles of me - - - -
If you'd care to e-mail me with your address and can get the motor off your die-filer, I could come around and collect them both.
It's easier for me to work on them at home (tools, test gear and timeslots available).
Can't guarantee to fix them if they're really bust, but I can check for the obvious faults and let you know accordingly. Don't want to throw them out if it's just a simple problem.
E-mail me
Andy
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Post by the_viffer on Oct 23, 2006 8:55:33 GMT
Have fun and wear rubber gloves and boots!
Now you are just baiting me to see if I'll come up with an off-colour joke. Resist, resist. (Pardon the pun but hey it was clean!)
Serious note: I was once told by a TV (not T-V) repair man that it is a good idea, when poking around in high voltage places, to keep one hand in your pocket. That way, if you touch some high voltage part it doesn't have anywhere to go, especially if you are standing on a dry surface in rubber shoes. The problem is that usually your other hand is touching something earthed, eg the bench or the chassis of the telly. Then the high voltage goes up one arm and down t'other, taking in a wee tour of your heart.....
Chris.
I heard that story too. I wonder do they check their trouser pockets for holes really carefully?
I was less than amused to find I'd been resting both hands on the metal die filer table and leaning against the metal bench on which it was mounted when there was an earth fault and standing on a bare concrete (but dry) floor. At least there was a circuit breaker and I was wearing work boots.
Cheers!
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Post by the_viffer on Oct 23, 2006 9:01:08 GMT
Hi houstoneng
[everyoneelsetalkamongstyourselevesforabit]
My elder daughter goes to school in Bickley so I think you are not that far from me. I think less than 10 miles.
[/everyoneelsetalkamongstyourselevesforabit]
Thank you very much for a kind and generous offer. If it is not too much trouble then yes please if you could have a brief look that would be wonderful.
I will email you offlist. I've now noted your email address. I suggest that you now edit your message to delete it to save it being harvested and used to send you even more spam.
Cheers!
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Post by houstonceng on Oct 29, 2006 23:54:02 GMT
All The die filer motor appeared to be suffering from swarf or other conductive detritus on the "centrifugals". Yes there was one. Stripped, cleaned and reassembled it now runs. Chris was close to the identification of root cause.  The 1/2HP motor was ok. Just needed the wiring sorted. Colours were a bit odd - to say the least "Centrifugals" were ok. BTW. Best time to check if there is a Centifugal switch in the start circuit is to listen for it re-engaging as the motor slows down.  Andy |
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Post by the_viffer on Oct 30, 2006 9:16:01 GMT
He don't mess about do he?
I dropped the motors off Sunday tea-time. Late that night while I was tucked up in bed Andy sent me an email saying despite the horrors of a butchered socket grub screw it is all done and dusted. And all this when he was celebrating his birthday.
Superb work, Andy very many thanks.
Cheers!
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Post by chris vine on Oct 30, 2006 17:29:28 GMT
Grand Eh.
Now The Viffer can keep his drinks vouchers for some more drinks (sorry castings etc.).....
Chris
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Post by the_viffer on Oct 31, 2006 9:27:49 GMT
Grand Eh. Now The Viffer can keep his drinks vouchers for some more drinks (sorry castings etc.)..... Chris The_Viffer is planning to drag himself complete with the infamous taxi down to Macon in two weeks to buy some not castings. Keep an eye peeled for us as we have some media interest (especially in France). Our party includes a number of disabled people who are not letting disability get in the way of having a right old laugh. There may be some stuff about it at www.motorsportendeavour.com by now. As the_viffer drove home from Andy's the indicator switch gave up the ghost. So electrical problems seem to be haunting me. Alas not just a question of buying a new one. Last list price was nearly a hundred sovs and they have long been unavailable. Cheers! |
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Post by Phil Sutton on Oct 31, 2006 20:14:26 GMT
T_V,what does this indicator switch look like?Is it possable to adapt something from another motor?If it is like the old A35 Lucas type you may pick one up from an Autojumble for a lot less.
Phil
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Post by the_viffer on Oct 31, 2006 21:05:21 GMT
Good idea Phil.
Oddly enough it is easier to find 50's stuff than 70's and 80's BL despite it being everywhere at one time. Just think how comon Marinas and Allegros were at one time and how rare now. And I've only a couple of weeks before we go.
As it happens I've now got it sorted. One of the people I'm going with said "why bother 50 million French people don't bother using indicators." I'd have been a bit more convinced if he'd not broken his neck while driving through Europe...
Cheers!
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