Digital Motors - Preston FI + Z Manual

The Serial receptacle is used both for updating MDR software as well as providing
communication with future accessories. The procedure for updating firmware is as follows:
1. Load the installation files provided on the Firmware Upgrade Installation Program CD
to the PC. The update files will be installed in the folder C:\Program Files\Preston
2. Open the file containing the Firmware update. The PC screen will show the
message: "Connect MDR to a serial port"
3. Disconnect the Power connection to the MDR. Connect the serial cable from
the PC to the Serial LEMO receptacle of the MDR. While holding the Reset
button in, connect power to the MDR and release the Reset button.
4. When the PC screen shows that the firmware upgrade has been completed,
remove the serial cable.
DM-1
There are three types of digital motors used in the FI+Z system. All of the motors use optical
encoders to provide positional feedback to the MDR unit. Optical encoders are highly reliable
and do not suffer from wear.
The DM-1 is a general-purpose motor capable of providing high power output over long
periods of time. It is recommended for driving even the stiffest lenses under all extremes of
temperature, vibration and humidity.
The DM-2 is a smaller and lighter weight motor. It can be used on all but the stiffest cinema
lenses.
The DM-3 is specifically designed for use with snorkel lenses. It combines very high torque and
mechanical stiffness to smoothly drive the Pan and Horizon axes of the Revolution Snorkel lens
V. Digital Motors
DM-2
Fig6. Digital Motors
DM-3
11