Functions; Mdr-2 Operation - Preston FI + Z Manual

A socket is provided at the bottom of the FIZ control for an external Iris control. When the
external iris control is connected the slide control on the FIZ will be disabled.
Fig5. Remote Iris Box p/n 4020
IV. MOTOR DRIVER FUNCTIONS
The Motor Driver 2 (MDR2) is responsible for driving the motors, providing control signals to the
camera, and transferring camera operating data to the wireless network through the transceiver
module.
Automatic lens calibration begins whenever the Reset button is pressed or when a motor is
initially connected (assuming the MDR is powered). During this sequence, the motors find the
mechanical end stops of the lens. The lens end stops are then defined to be the full travel
allowed the motors, and also represent the full-scale range of the Focus and Iris controls on the
Hand Unit.
The direction of any of the motors may be reversed by the three direction switches located just
above the three motor sockets (see fig.3).
The maximum torque output of each motor may be adjusted by means of the three position slide
switches also located just below the motor receptacles. Adjusting the maximum running torque
of the motor also proportionately changes the calibration torque.
A separate analog command signal is provided to allow video lenses to be driven from the
Camera output of the MDR Unit.
Power is provided to the MDR-2 through the 4-pin Lemo connector (see fig. 3). The MDR-2
operates over a voltage range of 22 – 30 VDC. The power source should be capable of 3A
current. The Microwave Transceiver unit incorporates a voltage booster unit. This unit allows
MDR-2 operation from 11V to 30V. When operated from 12V, the power source should have 6A
current capability (for a three motor installation).
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