Bowstring Equatorial Sundial

thingiverse

Create an equatorial bowstring-style sundial printable design that works in both hemispheres and a wide range of latitudes. The dial consists of the equatorial band, bow, base, and north and south caps. Use a 3mm rod (filament or kebab stick) for the gnomon, attach the equatorial band with noon mark aligned to the bow center, then install end caps into the bow to match shadow movement with time. Insert the bow into the base using latitude scale on the bow and base top marks. Align north/south direction by a compass and local magnetic declination. Enjoy your sundial! Optional: omitting conical caps or using alternative bows, adjusting geometry in OpenSCAD file for gnomon size or band gap. Compensating longitude relative to timezone by centering the band, but note Equation of Time variation and atmospheric refraction errors. Darker opaque colors are easier to read. This is a first sundial design with possible improvements like more robust Band/Bow joint, UV stability, numbering, automatic gap setting, annalemma plot, equinox and solstice indicators, or maybe just looking like a bird!