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To provide 20 degrees of rotate in each direction, as well as 10 degrees of
elevate, the gun assembly (including the marker, roller feeder and hopper)
are mounted on a T-bracket platform that swivels on a lazy susan bearing.
A servo (mounted to the side of the T-bracket) provides the elevate
power through some simple push-rods, while
a slow-speed geared motor (partially visible in lower right corner)
provides the extra power for the rotate. The rotate motor is controlled
by one of the extra channels provided by the Anvilus Speed Controller.
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