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RC Jansen Strandbeest

by tosjduenfs, published

RC Jansen Strandbeest by tosjduenfs Mar 11, 2015

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9341Views 1727Downloads Found in R/C Vehicles

Summary

https://youtu.be/1x77e4XvqZ4

Based on the work of Theo Jansen, this Strandbeest was made using G10 and Delrin cut on my homemade CNC router. The motors are Pololu 20D 73:1 motors (https://www.pololu.com/product/1163) and they are powered by a pair of their simple motor controllers (https://www.pololu.com/product/1372). The leg joints use nylon shoulder washers (http://www.mcmaster.com/#90061a005/=w9n95r) to help reduce friction and wear. I have a ton of aluminum standoffs so those always tend to make it into my designs. The Strandbeest runs off of 2 cell lithium batteries. The bevel gears are from servocity (https://www.servocity.com/html/32_pitch__24_tooth_bevel_gears.html#.VQEnR0fF_Es).

Instructions

This project is not for the faint of heart. If you are serious about building one I can offer further instructions and a BOM but it will take some time.

AL leg sections should be cut from 1/8" Delrin or HDPE.

Triangular Leg Sections should be cut from 1/8" G10 or CF.

Spine and Leg sections should be cut from 1/16" G10.

The remote control can be setup with any standard RC setup that supports elevon or generic servo mixing.

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The best model so far I saw of Jansen's strandbeest. Well done and most important, working one with video.

Did you show any electronics as well ? I cannt find the right link somehow. I want to 3d print it actually...will need some elaboration of your model.

I think I have seen how it is done. Is the outer cam disc held onto the shaft with an aluminium collar which is held onto the shaft with a grub screw?

I think you've got it. The two cam disks that are on either side of the inner leg are joined by a screw near the outer edge of the cams. The two cam disks that are between each set of legs have a shaft secured to a hub with a set screw like you said.

Hi,
I am attempting to build your Strandbeest, not by routing out the parts but by 3D printing them. I have assembled one leg assembly and it all moves very nicely. I see that the inner and middle cam discs are joined together but I cannot see how the inner and outer cam discs are connected, can you help with this please.
I am going to try and use 2 continuous rotation servos for the drive, hopefully that will work.
Thank you for sharing a great design.

This is amazing. I so want to build this. I would love more instruction and a BOM but I don't want you to go out of your way to do it. If you have since put such information together, I would love to see it. Thanks.
Cheers

I would definitely make one. I have a few extra brushless motors and escs I can use to power it. I would like to laser cut it out of 1/8" plexi or wood. Can you provide assembly plans? Mostly hole sizes for bolts.

Can you document your RC setup for this and give a link to the gears you used?

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