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#1
24-09-2007
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Annoying brushed motor problem.
I've got this 11x3 peak racing carera motor that was bought from new.
It hasn't been used much and the brushes are in good condition (as they are new and used only a few runs). The comm has been skimmed, but still the motor refuses to start up. If I give it a spin (or the car a push) the motor will engage and run. It's currently on a motor break in and I can hear it speeding up and slowing down all the time. Any ideas what's up?
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X-5^2 :: CR2 :: XXX-T MF Last edited by Fiddybux; 25-09-2007 at 10:58 PM. Reason: Not fixed timing actually...sorry...shouldn't make much differnce though 
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#2
24-09-2007
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Check your motor springs make sure they are in good condition not bent make sure there is no crap in the brush tubes.
A
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Ashley Williams I always thought by 2013 we would have flying cars, but we have got blankets with sleeves!
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#3
25-09-2007
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Has the motor been really hot? Coz you can get burnt stuff on the brush tubes which can bugger things up.
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Canon 40D (350D backup) - EF-S 18-55 - EF-S 17-85 - EF 100-300 - EF 50 - Canon 430 EX || Speedlite - Canon BG-E2N Grip Adobe Photoshop CS4 Extended AX-10 Crawler - Thats all I have left!!!
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#4
25-09-2007
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Are the windings soldered to the arm stack or just crimped down. I suspect it's not contacting properly.
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 Nortech is ACE!
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#5
25-09-2007
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Quote:
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#6
25-09-2007
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Thanks for the replies everyone.
I can't see anything wrong with the arm...it looks newish...much like any other. No visibly broken copper strands....all soldered to the top of the comm as expected. I have tried loads tonight, but to no avial. I've tried the arm in two different cans, one with the same brushes (by just swapping the end bell onto a different can with the same arm) and one other can with different brushes. Nothing made any difference and the bugger refuses to start properly. I also skimmed it and cleaned up the brushes (which are relatively new) with a comm stick and motor spray...no joy still. The only thing left is to try some new upright brushes...which seem to be quite rare compared to laydowns these days. I don't hold out much hope for this working though because the arm exhibited the same behavior in two different cans with the same brushes and different ones which I know work. I don't suppose anyone else has any further ideas....other than to jsut smash it to bits!  
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X-5^2 :: CR2 :: XXX-T MF
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#7
25-09-2007
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You could have one of the winds broken on the armature so its only running on 2 winds. that may be why it works on a "jump start" only.
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