Compensation mechanism for the elimination of manual backpan on

Details Compensation mechanism for the elimination of manual backpan on Compensation mechanism for the elimination of manual backpan on

1997-06-19

1998-11-10

Rutledge, D.

Optics: motion pictures

With support

395428, 395 13, 74 534, G03B 1700

Patent

active

058351930

ABSTRACT:
A new circuit is connected to the pan servo amplifier 38 of a camera remote pan head 44 for the purpose of eliminating the need for manual backpan. The circuit comprises a tachometer 20 mounted on the pan arm of a camera crane or jib arm 28 and connected to switch 32 and potentiometers 34 and 36. The switch and potentiometers select between three options for operation: an off position, a one to one reverse correspondence between the panning movement of the crane arm 28 and the panning movement of the pan head 44, and a variable reverse correspondence between the panning movement of the crane arm 28 and the panning movement of the remote pan head 44.
The output is summed to a servo amplifier 38 which drives the remote head pan motor/tachometer 40. A number of means for alternative implementation are also suggested.

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