Model 1200K/1210K - RCI SNG ANTENNA SYSTEM
4
Operation and Maintenance Manual
SECONDARY DRIVE SYSTEM
The Az and El Roto-Lok® drive systems are driven by a low backlash worm gear set with a 40:1
ratio. The factory low backlash of the worm-gear set is reduced further by the Roto-Lok® drive ratio
resulting in a lash equivalent to only .06 dB as seen by the RF system. The gear sets are housed
in a sealed housing which allows the gear set to be continuously lubricated in synthetic oil which
maximizes gear efficiency and minimizes wear.
MOTOR DRIVES
Lightweight, reliable, servo-quality DC motors with integral gear box are used for az, el and pol
drives. These motors were selected because they provide the best torque-to-weight ratio as well
as allowing dual speed operation for slewing and peaking. These motors produce constant torque
over the speed range with no cogging at low speeds which ensures smooth operation when
peaking antenna. The 24V DC design provides current limiting torque control and will allow vehicle
battery operation if necessary.
CONTROLS
The system will interface with a jog controller which allows remote control of the system. Each
axis position is displayed as well as limit indications. The unit will also interface with a full function
controller with features such as automatic stow, GPS/flux-gate input and automatic satellite
pointing and tracking.
CONSTRUCTION
Except for the drive components and bearings, the trunion and backing structure and covers will be
all aluminum. The fabrications on parts and assembly will be of world wide quality standards AvL
is noted.
