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7:45 AM - 09/25/2007 by
Daniel Schuhmann
The principle of cable positioning is simple: both solar arrays are literally tied together using a cable, so that both turn in perfect tandem. A counterweight is mounted on one side of the cell.
The cable is positioned using a computer-driven battery-powered screwdriver, by winding it up and letting it out.
Disassembled battery powered screwdriver on the bench
Wiring up a controller circuit for the battery powered screwdriver
Detail: soldering leads to the controller board
Calibrating signals and voltages between controller and screwdriver
Leads attached to the screwdriver motor
The motor returns to its housing, leads attached
