Ars Technica's Teardown of “Dishy McFlatface,” the SpaceX Starlink user terminal links to the YouTube video Starlink Teardown: DISHY DESTROYED! and a screenshot from there is shown below.
There are three 45 degree bevel gears; the two on each side connect to motors and the one in the center seems fixed relative to the mounting posts.
Question: I'm wondering if by driving the substantial-looking motors in the same versus opposite direction this kind of mechanisms could both rotate around the shaft (azimuth) and point up and down (altitude or elevation)?
This answer to How should we point our SpaceX Starlink ground transceiver antennas? in Space Exploration SE confirms that even the current dishes move somehow but it's not specific. The antenna is not parabolic reflector like a "direct-TV"receiver, but instead is an array antenna. It seems that in order to maximize exposure at all angles they've decided to articulate the array mechanically for at least some of the satellite tracking, rather than use electronic phasing of each element alone. This way the antenna can always present near-maximum area to the StarLink satellites as they pass back and forth across the sky every few minutes.
click for larger view or watch the linked video