Hypocycloid How To (25:1 example)

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This Thing Includes Complete Design Files In Openscad And Instructions For Customizing To Your Own Needs. There Is A Set Of Stls Which Can Be Printed To Produce The Example Shown In The Videos. Note That The Zip Archive Provides Some Files Not Listed Separately. Have A Look At Video Here: Http://Youtu.Be/Np0Elifxf14 The Inspiration For This Thing Was Thing 43176 And The First Section Of Video Is Of My Build Of Thing 43176 In Action. It Provides About A 50:1 Reduction. In The Video, You Can See That The Output Slows The Drill Down A Lot. To Build This, I Had To Reduce The Rotor Stl 98% With Netfabb, Then Enlarge The Bearing Mounting Ring With A Dremel. Pretty Cool Result, But Three Things Were Lacking. First, It'S Too Big €“ Bigger Than The Nema 14 I Wanted To Mount It On. Second, The Gear Ratio Is Too High. Third, The Output Shaft Is M8; I'D Like It To Be M5. Looking For More Information, I Found Thing 8348 And Thing 19649. While These Provided Very Useful Pointers To Hypocycloid Design Info (And The Crucial Alex Lait Script), There Still Seemed To Be A Lack Of Information On How To Actually Design A Hypocycloid Gear Reducer. My Thing And The Files Associated With It Are An Attempt To Explain The Process In More Detail. It Is Both An Extension Of The Design And An Explanation Of How To Create A Hypocycloid Gear Reducer. While Not Quite Ready For Customerizer, It Should Help A Lot Of People Design These Devices. The Remainder Of The Video Shows The Design This Thing (25:1 Reduction) Running On A Nema14 Stepper. The Motor Is Running At 5 And 10 Revolutions Per Second. It Also Shows The Same Motor Without The Reducer Running At 5 And 10 Rps. The Final Section Shows The Reducer Being Reversed. Credit Where Credit Is Due: The Key Enabler For The Hypocycloid Gear Reducer Is The Python Script From Alex Lait ( Http://Www.Zincland.Com/Hypocycloid/ ). None Of This Would Be Possible Without It. While I Provide A Slightly Modified Version Of The Script To Make It Easier To Use From The Python Ide In Windows, I Have Done Nothing To Improve The Calculations In The Script In Any Way. All Credit Goes To Alex Lait. Likewise, The Detail Design Of This Two Cam Reduction Is The Work Of Jedren (Thing 43176). All Credit For The Details Goes To Him. All I Have Added Is An Openscad Version Of The Design And The Instructions For Modifying And Customizing The Design. I Hope You Find This Useful.

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