I show how to model a ring gear, how to set up planets, carrier and sun, joints and motion links, and making helical/herringbone sets. I'm using Fusion360, though it should work fine in other CAD software, and I 3D print the set to show you that it works.
Files: https://www.thingiverse.com/thing:4655373
Playlist with all my gear tutorials: https://www.youtube.com/playlist?list=PL4Yme23PQa9njUgvH2o2HP03-4RtZObzO
Further reading:
Mathematically perfect ring gears: https://khkgears.net/new/gear_knowledge/gear_technical_reference/calculation_gear_dimensions.html
Willis equation for when all 3 gears move:
https://www.tec-science.com/mechanical-power-transmission/planetary-gear/fundamental-equation-of-planetary-gears-willis-equation/#mjx-eqn-pln
Instagram: https://www.instagram.com/creo_nova/
Website: https://www.creonova.nl/
Timestamps:
0:00 Introduction
0:28 Modelling ring gear
1:47 Adding a regular gear
3:54 Setting up motion link
4:58 Examining interference between pinion and ring gear
7:43 Making ring gear with proper backlash and clearance
11:12 Checking meshing with new ring gear
11:58 Turning mechanism into planetary gearset
21:25 3D printed planetary gearset
22:02 Comparing planetary gearset to regular spur gear
22:53 What happens if you don't correct addendum/dedendum
23:32 Mathematical requirements for working gearset
28:08 Gear ratios in planetary gears
30:03 Making helical planetary gears
32:31 Making herringbone planetary gears
34:01 Warnings for helical/herringbone planetary gearsets
35:49 Outtro touching story