[OpenSCAD] Curved Chain (tentacle) using a series of pill shapes - recursive function?

Mark Schafer mschafer at wireframe.biz
Wed Oct 26 18:25:03 EDT 2016


A tail/tentacle design (if controlled by parallel cables) needs to be as 
untwistable as possible for it to work.

So solutions with ball joints that allow twisting degrees of freedom 
will cause your tail/tentacle to become twisted and non-linear to control.
Ideally you're looking for universal style joints between nodes 
alternating up with down.
This way the cables remain in the same orientation as they are manipulated.
E.g.
     - 
http://hackaday.com/2016/10/21/two-stage-tentacle-mechanisms-part-iii-putting-it-all-together/
     - https://www.youtube.com/watch?v=8NQH2B-Mnvg
See second video for a commercial toy I can't find in the marketplace. 
(Clic something maybe?)
But its a good guide for what to make. Must keep the rigidity up but the 
weight down. It gets very heavy very fast as you add nodes.

Please let us know how you get on...






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