Hi Peter:

When I apply 5 ma to a lens the iris stays closed and by 10 ma it's wide open. 
  This done with no connection to the damping terminals.

Is the control signal coming from the lens?

Any ideas on where to get the 4 pin plug and socket connectors?

-- 
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com

I have posted a message in the past about this, when someone else asked the 
same question. Basically the Drive is where you apply control current. Damp is 
a speed proportional feedback signal. Speed is the motion speed of the actuator.

Both controls are coils, the actuator is a moving magnet galvanometer with a
return spring. Typically unidirectional current up to about 30-50mA is driven
into Drive and Damp helps to make the movements smooth(er). The control is not
suitable for open circuit operation, it will only work with realtime feedback
(from the video signal).

Peter P.

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