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Old Jul 09, 2007, 09:20 AM
Registered User
Des Moines, Iowa
Joined Jul 2007
44 Posts
Help!
Outrunner spontaneously reversed!

A friend had a funny thing happen... His kit-built outrunner motor reversed direction since the last flying session. He said he had recently smacked it into the ground.. Anyone have any idea what's going on with his motor?... I may ask him to bring his plane over to my shop so we can trouble shoot by switch out components...
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Old Jul 09, 2007, 09:22 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
The Netherlands, GE, Nijmegen
Joined Feb 2001
10,924 Posts
Switched (any) two of the tree leads between motor and controller?
Changed direction in controller setup?

Vriednelijke groeten Ron
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Old Jul 09, 2007, 09:28 AM
Light and floaty does it
Work in Progress's Avatar
Cambridge, Great Britain (UK)
Joined Sep 2004
2,859 Posts
Actually that happened to me recently, using a 400XT on a cheapo Robotbirds Chinese 18A speed controller. It actually happened between one flight and the next, all I had done was change battery.

There's no documented reverse mode in the speed controller, but I assume it must have been there somewhere in the firmware, and triggered itself through a software error of some sort. Tried every way I could think of to reset it but ended up just changing over two of the ESC to motor leads. That done, flying continued as normal and I haven't had to change it again.
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Old Jul 09, 2007, 10:51 AM
Registered User
Des Moines, Iowa
Joined Jul 2007
44 Posts
Thanks guys... I'll likely switch the wires around and that should take care of it.
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Old Jul 12, 2007, 10:33 PM
Registered User
Anderson, SC
Joined Jan 2005
71 Posts
Could the magnets have reversed polarity by being shocked in the crash ??
Frank
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Old Jul 13, 2007, 08:12 AM
Registered User
Beaverdam Creek, VA
Joined Aug 2005
2,322 Posts
Quote:
Originally Posted by Frank Rothmann
Could the magnets have reversed polarity by being shocked in the crash ??
Frank
If all the magnets reversed it would still run the same way. If some of them reversed it would run poorly if at all. I don't think shock can reverse magnetic polarity though. Most likely the ESC.

Good Luck!
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