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Old 31-05-2018, 03:21 PM   #1
JAC4472
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Default Wrenn R1 motor problems

Hello everyone, i've got a problem with an old Wrenn loco of mine I was given some time ago hopefully someone can give me some advice.

The loco in question is a Wrenn R1 tank engine and it appears the small red wire around the armature (I think thats what it's called the part that spins, apologies if its wrong!) has started to come undone.

Should this affect the running and if so what should I do? I don't want to get rid of it seeing as its pretty old would be a waste. Problem is i'm not exactly mechanically or electrically minded as you can probably tell and i've got no idea what to do!

Cheers Jack

I tried adding a picture but I can't do it for some reason
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Old 31-05-2018, 05:13 PM   #2
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The windings.... I'd try to glue it back so it doesn't come lose and get mangled. Its obviously not broken as yet or your train wouldn't run. Not sure what glue to use just to stop it coming lose. Something that will stick it firm without damaging the coating of the windings.
It does need doing as if it should snag then you will end up needing a complete rewind. The first thing to do a quick check it is not endangered of getting snagged on anything as if there is nothing near it then you can relax a little! I'd still find something to glue it to prevent it from moving too far...

What do others think? Anyone who knows more?
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Old 31-05-2018, 05:42 PM   #3
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I would try painting some polyurethane varnish on the windings. We used to use varnish at work to stop transformer windings from buzzing if they came loose.
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Old 01-06-2018, 06:25 PM   #4
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Thanks chaps I should have mentioned it doesnt run doh! If i twist the armature with power applied sometimes it'll run for an intermittent burst but then stop again more often than not it won't work at all though!

Feel like a right plank seeing as I bought new brushes for it about a week before it stopped working!
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Old 01-06-2018, 07:09 PM   #5
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In that case, I think it will need rewinding. I think scalespeed may be able to help. http://www.scalespeed.co.uk
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Old 01-06-2018, 07:55 PM   #6
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Red wire around the armature doesn't sound quite correct somehow?
Can you post a clear picture of the problem?

Windings on a motors armature are usually very fine copper wire and covered in a clear lacquer.
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Old 01-06-2018, 07:57 PM   #7
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Does have a red tinge though doesn’t it FB.
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Old 01-06-2018, 08:05 PM   #8
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Orange'ish or a sort of gold colour is more like it! It's a clear lacquer on top of copper.
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Old 01-06-2018, 08:24 PM   #9
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Yeah OK. How about a blood orange?
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Old 02-06-2018, 09:23 AM   #10
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Morning all, i'll check out Scalespeed see if they can sort it thanks Rog.

I did try to upload a picture but I can't do it for some reason, I don't know if it's beacause i'm doing this from my smartphone. The wire in my opinion is definitley red which if as you have suggested Flashbang and WTD isn't correct makes me wonder if its been reworked before?
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