You might want to check the frame rate to the servo's
some are 20ms some are faster. I at least one of the
systems I had had a frame rate of 16ms. We used
model A/C servo's on a keyboard tester several; years ago
and reduced the hunting by changing the frame rate.

Walter Banks
----------
> From: Alec Myers <Alec@W5.CO.UK>

> Mike, I'm afraid it's not that simple. Most of the time, the unit draws
> about 500mA while moving, then reaches the set position and stops. Then
the
> current drops to about 10mA. Only sometimes, it gets to about the right
> place, then oscillates, and the current doesn't fall off.
>
> It _feels_ like the pulses are random lengths - the motor is turning full
> torque one way then the other - but on the 'scope, the pulse lengths  are
> steady as a rock. If I push against the servo, or stall it with excess
> friction, then I'd expect heavy current draw. But not at the low load
it's
> under.