Check the brushes.
A worn brush will sometimes jam in one direction and still run ok in the
73s de Jim
> -----Original Message-----
> From: firstname.lastname@example.org
> [mailto:email@example.com]On Behalf Of Glen
> Sent: Wednesday, March 09, 2011 8:29 AM
> To: tower talk
> Subject: [TowerTalk] Emotator rotor motor problem
> My Emotator 747 rotor motor now fails to turn right, but turns left just
> I removed the rotor this morning and put it on the bench, same thing.
> Removed the top and bearing ring. Inside looks fine. Watched
> motor as I
> applied power LEFT
> and no problems. When applying power RIGHT, motor starts to
> move and makes
> a snap noise, as if
> it is internally jammed from moving that direction.
> I will check the current both ways, but expect RIGHT to be higher since
> there is a jam.
> Anyone have any experience with a DC rotor motor that will only turn one
> Glen K4KV
> I suppose getting a replacement motor will not be fun :-(
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