[Robotgroup] [Q] Animating a worm ?

[Paul Atkinson]

Perhaps a concentric spring with an internal string. Pull the string to make
it contract, the spring will make it expand. If the internal diameter of the
spring is larger than the outside diameter of the string, you will get the
hump-back caterpiller effect. Might try some muscle wire / nitinol as the
contracting agent assuming the structure can handle the heat...

Or put some iron in the plastic fishing worm and have magnets under the
working surface move to induce motion above. Not sure if this would give the
characteristic compression/decompression movement since the magnets might be
so close together as to have a group effect??

Paul

On 3/14/07, Def Egge <robodigest at innervate.com> wrote:
>
> I am looking for suggestions for a way to animate (simulate the
> wriggling of) a soft-bodied, plastic fishing worm.  Circular solenoid
> [noisy ... clicking] ?  Servo [noisy ... whirring]?
>
> Previously, I'd accomplished this by drinking to the bottom of a
> bottle of mezcal con gusano.  ;-)  I seek a better way.  Thanks.
>
>
> All the best....
>
> Mike
>
> _______________________________________________
> Robotgroup mailing list
> Robotgroup at puremagic.com
> http://lists.puremagic.com/cgi-bin/mailman/listinfo/robotgroup
>