As many other topics, this one has been in my to-post list, just for too long...
Today I decided it must go because I'm also preparing a post for the next weekend, where something very similar was used. So it wouldn't make any sense to post it afterwards...
It is a simple and clever idea, although not an obvious usage for its core part (x928cx1, hockey slap shot springs), on how to implement a compact automatic return-to-center steering mechanism.
A brilliant application, found at LUGNET and Brickshelf. Where else it could be?... ;)
It was presented by Ian Power (chase2K) at LUGNET, already in March 2008.
As it seems, the idea was attempted more than once before, but only the new PF M-motors offer low enough resistance when getting no power applied, to let axle rotate back to the center position.
But just because, hardly the TECHNIC builders leave a problem with one single solution, lets see a different method by Mrutek, featured at one video from Sariel.
Return-to-center steering function is here achieved with a rubber band layout, added over a Sariel's mini pendular steered suspension.
This requires however some tunning of rubber band strength and steering motor gear ratio, to the vehicles weight, used tires type and floor friction.
In the sequence of Jetro's comment, I've decided to add here Sheppo's return-to-center solution as well, which I hadn't seen before.
Not so compact as Ian's solution, bas working as good as it seems.
More photos from Sheppo's BS folder.
Still wonder how these elastics have the strength, to force the axle rotating back to the central position. Must give it a try.
Suddenly it looks like everybody has also his own solution for this problem...
Below a new one that Jacob's left to us, on this post's comments.
Would anyone like to come with a smaller and fewer parts version of it?...
You may also find the mechanism proofing to work, on this video.
A late finding originated by a comment from Peer Kreuger (Mahjqa), shown us the "hockey spring" part being used for return-to-center steering purposes already back in 2005 .
In the image above we can clearly see the mentioned return-to-center mechanism, underneath this Vayamenda Industries F1 Racer, by Peer.
You may also find additional images from this model at Peer's BS folder and MOCpages account.
Last Update: 2009.Sep.10 13:09 GMT