[TowerTalk] Emotator rotor motor problem

[Jim Hargrave]

Check the brushes.
A worn brush will sometimes jam in one direction and still run ok in the
other direction.

    73s de Jim
       W5IFP


  > -----Original Message-----
  > From: towertalk-bounces at contesting.com
  > [mailto:towertalk-bounces at contesting.com]On Behalf Of Glen
  > Sent: Wednesday, March 09, 2011 8:29 AM
  > To: tower talk
  > Subject: [TowerTalk] Emotator rotor motor problem
  >
  >
  > Hello,
  >
  > My Emotator 747 rotor motor now fails to turn right, but turns left just
  > fine.
  >
  > 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
  > way????
  >
  >
  > 73's
  >
  > Glen K4KV
  > I suppose getting a replacement motor will not be fun :-(
  >
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