The author, Matthias Wandel, will also sell you a programme to run on your Windows computer. This one handles ‘undercut’, which removes the gear-interference problem that prevents the easy creation of gears with fewer than 17 teeth. Woodgears is an excellent on-line gear generator website which is very flexible (frankly, amazingly flexible) and has this excellent associated video.Also, there are two that will design gears for you.CAD package Fusion 360 will draw gears for you – so you might want to stop reading here, and download that instead.The slides mention Shigley’s Mechanical Engineering Design, which maybe what they are based on. The best diy gear information source, of all the many many videos, websites and documents that I read to design my gear pair, this presentation was far clearer than the rest, and had extra information.If desired check the "Run ond Startup" checkbox and hit run. The Add-in should now appear in the "My Add-Ins" list.Navigate to the extracted Project forlder and hit open.Select the tab Add-Ins and click the green plus symbol next to "My Add-Ins".Open Fusion360 and press ADD-INS > Scripts and Add-ins.Download the Project as ZIP and extract it somewhere you can find again, but won't bother you.Add "Generate as Base feature" opting for better performance.Fix Errors in direct modeling mode (again).Change persistent inputs so they won't reset after undo.Group features in Timeline to take up less space.This significantly improves perfermance for files containing complex gears and also seems to spead up generation a bit. With the base feature option enabeled, gears are generated inside a base feature, meaning that no design history is being captured for the gear and it does not need to be recalculated every time something in the timeline changes. While a hybrid system would be possible, I do not think it is worth implementing. Persistence is lost if Fusion360 or the Add-In is restarted but persistence is not affected by undos. The new system just stores values in a variable. So if you wanted to tweak a gear you just generated you would have to re-enter everything. This has the disadvantage of being rolled back by undos. Previously input persistence was achieved by saving the input values to attributes. These features are now contained in a single timeline group so they do not clutter up the timeline. This Add-In may generate hundreds of features in order to create some gears. This is a "Branch" of Ross Korsky's Helical Gear Generator Add-in for Autodesk's Fusion 360.
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