Using this sketch as a reference, make some disks and start a 3 D model Layout of the gears needed, starting with a sketch, it will become my Master Sketch
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I will share how to avoid 99% of the issue and be aware of the remaining 1% and be ready for itīTW, from my experience, Fusion 360 does crash and fail too!ĭesign the escapement, print parts and test Learn about tological naming issues and how to avoid problems, it is not that big of a deal. YouTube has some good videos, make sure they are recent.
I do not think FreeCAD is very complicate to use, or to learn, but it does take some dedication to get started, reading thru the forum and the user showcase is a good source of inspiration I switched to the Gear workbench ‘Megagrant” that offers more parameters to customize gears I did start with Fusion 360, then found the gear workbench in FreeCAD, from there I stuck with FreeCAD, now the 0.20 release. I use Part Design, Assembly 4 and Gear Workbench I am a Mac user, so I favor the GUi approach whenever possible.Thank You to the comunity that make FreeCAD available on all platforms I consider myself still as a beginner with CAD in general and FreeCAD is the programm I am most familiar with. Traité d'horlogerie moderne, Claudius Saunier I have learned a lot about Horology with this book:Ī Treatise on Modern Horology in Theory and Practice, Claudius Saunier Roskopf and a thorough study of his watch Links to books about the history of the original, including a detailed biography of G.F. The size is 144 mm in diameter and 90 mm thickĮventually I will redo the model in a smaller size using a 0.2mm nozzle Quite big at this time, parts are printed with a 0.4 mm nozzle on a FDM printer The motor spring is repurposed from a small engine pull start The spiral is made out of piano wire, patiently hand shaped WatchGear3_4.jpg (146.78 KiB) Viewed 3605 times protoFrontBack.png (856.17 KiB) Viewed 3605 times ModelfrontBack.png (455.84 KiB) Viewed 3605 timesīuilding an easy to build replica of a Roskopf watch with 3D printed partsĪll the parts are 3D printed, the hardware and springs are steel
It does run, it can bee seen here: Īttached are pictures of the model, the first fully running prototype, and a view of gears The spiral spring is also 3D printed, it works for prototyping, but also experimenting with making one out of small piano wire and that is an adventure of its own right. The power spring comes from a small engine recoil pull start, I might change for clock spring later on Winding gears are module 2, involute and bevel The driving gears are a module 1 cycloid profile
The arbors and steel pins are 1 and 2 mm piano wire The escapement itself is five time the size of the watch in the bookĪll gears and frames are printed with a 0.4 mm nozzle on ender 3 in PLA +Įventually, I will try to use a 0.2 mm nozzle and maybe even go down to 0.1mm and have real watch size parts It is still fairly big at this time, 144 mm in diameter and 90 mm thick I use freeCAD 0.20, Part Design, Assembly4 and Gear workbench (Megagrand Fork)
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Roskopf, the inventor and a descrition of the watch can be found in this free book here: I am in the process of making and building a 3D printed watch
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