The azimuth axis rotates on a rear wheel bearing from a Chevy, the elevation axis uses cheap pillow blocks, and the frame is welded from scrap angle iron and tubing. A NEMA-23 stepper with 15:1 ...

While not quite up to the job it was originally intended for — positioning a 1.2-meter dish antenna — [Manuel] did manage to create a pretty capable azimuth-elevation positioner for ...

In order to obtain intersection angles (azimuth: longitude and elevation: latitude) independently from the overall body's movements, the sphere was considered attached to trunk. Humerus intra-extra ...