Machine Screw Jack and Ballscrew Jacks Used in Antenna Manufacturing
- ComDRIVE units combine a machine screw jack, motor, and gear reducer into a
- single compact unit
- Special anti-backlash ComDRIVE
- Special 90-volt DC motor
Machine screw jacks and ballscrew jacks are commonly used in the manufacture of antennas ranging from small 5 or 6 meter units used for broadcasting, to large Earth station dishes used for satellite communications.
The two photos below show a new antenna developed for the broadcasting industry by Efficient Antenna Systems Inc. (EASi) in Clear Lake, Iowa using Joyce ComDRIVE units. The driving force behind this development was the need for a larger, more robust antenna.
EASi contacted Joyce/Dayton to provide jacks for the azimuth and elevation control of the antennas. Joyce supplied a special anti-backlash 10-tonComDrive with a tachometer between the motor and reducer and a special 90-volt DC motor for this particular antenna design.