Ferguson's Mechanical Paradox Orrery
Description
Ferguson's Mechanical Paradox Orrery This is a work in progress. None of the parts have been printed as I do not have a printer yet. This was done as an exercise to learn Fusion 360. Most parts should be readily printable however tolerances have not been verified and may vary based on your printer, the material printed and settings. All parts appear to slice correctly in Cura. This design is based on an engraving of Ferguson's published orrery circa 1750. The model makes use of the Parametric Spur Gear posted by sergeevio. https://www.thingiverse.com/thing:3336641 Yes, I know it's been done before. See https://www.thingiverse.com/thing:93418 and https://www.thingiverse.com/thing:498482 Printing notes: - All parts should fit on a printer with at least a 220x220 bed. Base Plate will require turning off any skirt or brim. - See animation as assembly instructions. https://youtu.be/Wmk0KELKw7M - The Node Ring and Zodiac Ring may need to be printed with a smaller 0.2 nozzle for the markings to be legible. Rings print flat and then are glued to ring base support posts. - Most parts should print with no supports. Some exceptions are the Shaft-ABD and the Shaft-A1 which should be printed on their sides (horizontally) for strength. The Sun and Earth will need supports or print halves and glue them back together. The model uses the following non-printed parts. Virtually all have 3D printed equivalents, but the model will be stronger and work better with these parts. - The Sun Post should be cut from 3mm metal rod. Printed version included. - The Earth Axis, Node Pointer and the Sun Ray should be cut from 1.5mm metal rod. Printed versions included. Form the metal Node Pointer by bending it around the smaller bearing. - Four 5x11x4 ball bearings (http://tinyurl.com/y6bwf45o or equivalent). Printed version included. - One 10x19x5 ball bearing (http://tinyurl.com/yyu5zar6 or equivalent). Printed version included. - Five M3x35mm Hex socket screws. Printed pins included. - One M3 hex nut. Not needed if using printed pins. - Four M3 ball nuts (http://tinyurl.com/y57q28mr or equivalent). Printed, non-threaded, version included. To fasten, glue printed ball nuts to Pins. - Fourteen 6mm PTFE mouse feet used as "poor man's" thrust bearings (search for Teflon Tape Mouse Pad Feet 6mm). The self-adhesive feet stick into the circular depressions on the concentric gears and FrameBottom. Printed version included. - Lubricate concentric shafts with dry graphite. If you 3D print the mouse feet, glue them to one part and lubricate the other side.
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