R/C Tech Forums - View Single Post - Problems with modified motors

10-24-2004 | 02:19 PM

#3

AMGRacer

Tech Elite

Joined: Oct 2001

Posts: 3,939

From: Brisbane, Australia

Re: Problems with modified motors

Quote:

Originally posted by ShadowAu
Ok... I admit... I need some serious help with this one

I have recently been running Team Atlas mods... usually 8 Triples... they are a great motor considering the price and I have been having a lot of success with them

HOWEVER.....

for some reason, I now have a motor that EVERY time it hits the track the positive brush shunt AND the positive motor lead unsolder themselves from the motor... I am an experienced racer and also pretty good with the soldering iron so I've already ruled out cold solder joints...

I've also run through all the obvious things like gearing etc

I'd put it down to something wrong with the motor if it wasn't for the fact its not an isolated incident for me... in fact I can think of at least 3 other occasions with DIFFERENT motors where the same basic thing has occured...

The only common thing that I can think of that is the same in all cases, is that the un-soldering thing starts after I've changed to new brushes... each time it was a different brand of brush so I can't see a connection there... I also have a hood aligner, comm lathe and all the good stuff usually touted as necessary for motor maintance

I have NEVER had anything, even remotely, similar happen with Stock motors

So... has anyone any useful insights into just WHAT might be going on?

This is not too uncommon with low wind mod motors especially on hot racing surfaces. The best way to fix this is to go to a much higher melting point solder. The stuff that I have used actually requires you use flux to make it melt properly.

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