Description of the system components
2-4
Chapter 2: Introduction
98-147366-A
Secondary drive system
The cable drive system for azimuth is driven by a low backlash worm gear, set with a 15:1
ratio. The cable drive system for elevation is set at 40:1. The low backlash of the worm gear
drive is reduced further by the cable drive ratio. This results in a lash equivalent of only .1 in
azimuth and .2 in elevation as seen by the reflector system. Gear sets are encased in a
sealed housing that allows them to be continuously lubricated in synthetic oil, which
maximizes gear efficiency and minimizes wear.
Motor drives
Lightweight, reliable DC motors with integrated gearboxes are used for the azimuth and
elevation. These motors 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 without cogging at low speeds, which ensures smooth operation when peaking
the antenna. The 24V DC design provides current-limiting torque control.
Figure 2-4: Cable drive system
RF assembly
Summary of Contents for EXPLORER 7100GX
Page 1: ...EXPLORER 7100GX Installation and user manual 1 0 m Drive Away VSAT System for Inmarsat GX ...
Page 2: ......
Page 28: ...Start up and daily use 3 10 Chapter 3 Installation start up 98 147366 A ...
Page 66: ...Product Dimensions A 6 Appendix A Technical specifications 98 147366 A ...