bench grinder motor burns when shaft is vertical 2

[downwash]

i am building a machine witch has a bench grinder motor mounted verticly because its most practical for the apllication. the first motor ran and smoked and died. it was replaced the new motor makes noise and starts to burn i shut it off. i then put it on the bench it ran fine i picked it up while running and held it verticly it made noise and started to stink like a burning motor it is ac brushless if that matters the smoke and smell seem to come from a wond coil device mounted near the on off switch. i took the old one apart because it was the same one to see the configuration and found no machanical damage. im still scratching my head any one have any idea whats going on thanks

 

[waross]

Thanks for the feed-back, downwash.
respectfully

 

[itsmoked]

Yow! Nice catch indeed! Many an ME I have worked with have cursed, "gravity and the idiots who use it."

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com