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  #1  
Old 03-27-2010, 08:25 AM
2FER SLOTS's Avatar
2FER SLOTS 2FER SLOTS is offline
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Default Motor Repair?

Had a Carrera car running the E-200motor zipping around the track a while back,suddenly it sounded like a V-8 with half the cylinders dead. We putted into the pits and could not take off again without a push.
Sounds like a dead spot in the armature? I ordered a new motor and installed,story over right?
Been using the bad motor for mockup on chassis builds and decided to see what went wrong,so I took it apart
The problem is were the windings connect to the commutator they are just crimped.....Question is can/should these be soldered? I tightened the crimp and the motor runs part time
or is it best just to pitch it ?
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  #2  
Old 03-27-2010, 08:39 AM
JBriggsK9 JBriggsK9 is offline
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2FER SLOTS

I see no reason why it couldn't be soldered... most all motors I have seen have the wires soldered to the com... If it works great if not you still have your set up motor....

Chris
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Old 03-27-2010, 09:39 AM
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svanaken svanaken is offline
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Had the same thing happen to one of my Carrera cars and the windings are crimped in place. If you are careful, you can remove one turn and solder the winding in place.

Scott
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Old 03-27-2010, 11:32 AM
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Robert Livingston Robert Livingston is offline
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How in heck do you remove the insulation from those fine wires for soldering? Scrape it with a knife and hope you get enough scraped off?

I have an brand new SCX RX-42B that threw a winding out the hole in the case, but enough is left so that it could be reconstructed, if I were a micro-surgeon. I love a mechanical challenge, but this one looks too difficult.
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  #5  
Old 03-27-2010, 11:45 AM
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The Old Jaybird The Old Jaybird is offline
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Default Fire boy!!!

Burn the insulation off over a BIC flame or similar. Heck, even a match will work, then scrub it a bit with some emery paper or very, very fine grit sandpaper. wrap it around the comm post, bit of flux, solder and VOLVO!!! motor fixed...........maybe, YMMV! Its a touchy operation, but it can be done.

Good Luck.
TOJ
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Old 03-27-2010, 02:38 PM
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I never thought of that. I'll give it a try. I have a 15 watt pencil tip iron for tiny jobs like this.
Thanks!
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Old 03-27-2010, 06:03 PM
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It worked !!!
Before... 10 laps then hmmmm.
After .....60, 45ft laps still going strong
Just a little clean on the comm . with a file,touch the solder to the gun,then to the joint.
Didn't even throw the motor out of balance.Saved a $10 motor,but made me feel like a million
Thanks for the advice/help/encouragement.
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