Gimbals & Positioners
AvL introduced the patented Roto-Lok cable drive in 1994 and applied it to antenna positioning.
AvL introduced the patented Roto-Lok cable drive in 1994 and applied it to antenna positioning. The design is simple with relatively few components and minimal size and weight. The advantages of the cable drive include low or zero backlash, critical to the acquisition of the satellite signal, and high stiffness, which is critical to staying peaked in wind.
AvL improvements brought about a new AvL Cable Drive, which is 50% stiffer than the original. Our cable drive has such high performance that our competitors have copied our design, but AvL still leads the industry in cable drive experience and expertise.
The Zero Backlash AvL Cable Drive has enabled AvL to become the industry leader in designing and producing Ka-Band antennas. The incredibly stiff cable drive is paramount to Ka-band operations due to the narrow beamwidth.
The design also has a high safety factor and has multiple redundant cables, though it only needs one to operate effectively. If something were to impact the antenna causing some of the cables to break you could simply remove the broken or damaged cables and continue normal operation. The design also incorporates materials such as stainless steel cables and capstans, and aluminum output shafts, rendering the system virtually maintenance free.