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Electronics Forum -> Practical Electronics - Electrical/Mechanical Engineering and Design -> Mechanical Engineering and Design| Pages:12 ( Go to first unread post ) |    |
Starter Motor Choices| MacFromOK |
Posted: January 24, 2013 03:45 am
 
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 Forum Addict ++  Group: Spamminator Taskforce Posts: 12,956 Member No.: 5,314 Joined: June 04, 2006  |
Hey, you said they were shorted...   -------------------- Mac *
"Basic research is what I'm doing when I don't know what I'm doing." [Wernher Von Braun] * is not responsible for errors, consequential damage, or... anything. |
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| CWB |
Posted: January 24, 2013 03:53 am
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 Forum Addict ++ Group: Spamminator Taskforce Posts: 19,523 Member No.: 15,154 Joined: May 15, 2008 |
as i recall ...
the mica was there to prevent crud and copper/carbon pieces from wedging in the cracks . it also provided some degree of mechanical stability . the mica was abrasive enough that it would cause excessive wear of the brushes ... so it had to be kept down from the surface . -------------------- "Know how to solve every problem that has been solved"
R. Feynman '88 |
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| MacFromOK |
Posted: January 24, 2013 04:13 am
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Forum Addict ++ Group: Spamminator Taskforce Posts: 12,956 Member No.: 5,314 Joined: June 04, 2006 |
Some just have thin strips of poly-something-or-other on either side of the bars, which prevents the accumulated crud from creating a short.
-------------------- Mac *
"Basic research is what I'm doing when I don't know what I'm doing." [Wernher Von Braun] * is not responsible for errors, consequential damage, or... anything. |
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| Nothing40 |
Posted: January 24, 2013 05:16 am
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 Forum Addict ++ Group: Spamminator Taskforce Posts: 3,295 Member No.: 181 Joined: October 05, 2002 |
Back in the day,when I was really into RC cars/racing... I'd tear down the motor and clean it after every couple runs.I'd run a razor between the bars to clear out the gunk,and brush dust,etc. Seemed to work fine. Never noticed any issues with excessive brush/comm wear,or anything like that. (we had the advantage of various brush hardness/compositions,and spring weights to choose from.)
I'd try to clean the material out between the commutator bars,clean them up a bit,and give it a whirl. -------------------- "we need an e-kick-in-the-nuts button" -Colt45
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| Jimthecopierwrench |
Posted: January 29, 2013 10:42 pm
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 Moderator  Group: Moderators Posts: 9,597 Member No.: 561 Joined: January 10, 2004 |
Well hell, buddy quoted $100-120 to redo the 6.2. kinda hard to go wrong with that
 . -------------------- Hey! what's in here - is it a toy? oh. Hey! What's in here - is it a toy? oh.
Murphy. |
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