Perpetual Calendar Clock

thingiverse

##Clock with Perpetual Calendar Perpetual calendar is one of the representative mechanism of complication clocks and watches. **It shows correct date up to 2099 without correction** because it can handle all kind of month lengths including February of leap years. ###Features * Mechanical perpetual calendar which is only seen on very expensive watches and clocks * This clock has four sub-dials to show 24hours, month, date and day of the week * Ready for practical use. The clock itself is driven electrically and more accurate than mechanical one. No winding necessary * Easy calendar adjustment by direct manipulation of hands ###Design highlights * Four sub dials are arranged regularly * All six hands rotate CW * Skeleton design to maximize the visibility of the mechanism * No bearings or metal shafts are used but works smoothly * No screw heads in front * You do not need supports in 3D print * Printable with relatively smaller printers including Prusa MINI (size of maximum part is 180 x 180mm) To design the gears, I used "Precision Gears" addon for Blender, https://makertales.gumroad.com/l/PrecisionGears