I have a HamIV which has low torque over part of its rotation. I have it on
the bench and I can actually stall the motor by holding the top and bottom
with my hands. The motor seems weakest over about a 45 degree range centered
on East. I seem to have the same issue, to a lesser degree at 270 degrees.
Across the North part of its rotation there is no way for me to stall the
motor with my hands, which is the way I think it ought to be. The motor seems
to run fine and there isn't any apparent binding - plenty of slop at all
points of the compass.
Before I tear into it does anyone have any ideas? I replaced the motor
starting capacitor in the controller before taking the rotator off the tower.
No apparent change in its stall characteristics.
Thanks much --
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