I got the telemetry and videolink azimut / elevation antenna tracker prototype up and running the other day. Here is a video of it (without antennas) when it receives ASCII commands from the test software running on my lab PC.
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720 degree azimut rotation range
>110 degree elevation rotation range
Relatively high torque
Ball bearings on shafts
Tracking controller programmable in C (Arduino based)
Commands to tracking controller can be sent via serial link from the ground control computer
ASCII based command protocol.