On Mon, 22 Oct 2012 23:23:04 +1300, you wrote:

>Piezo based "Hula Hoop" motion screw thread driving actuators -
>capable of being very small
>
>         http://www.newscaletech.com/squiggle_overview.html
>
>
>SQUIGGLE micro motor technology
>
>Patented piezoelectric motor with smallest size, high force and speed
>
>The heart of New Scale's M3 micro mechatronics module platform is the
>SQUIGGLE motor, a revolutionary linear micro motor with incredibly
>small size and big performance.
>
>This patented ultrasonic motor creates high force and speed with only
>a few parts - compare to complex electromagnetic gearhead motors with
>hundreds of parts. SQUIGGLE micro motors allow product designers to
>add motion features into products where they could not have been
>imagined before.
>
>This simple, robust piezo motor is scalable to much smaller sizes than
>electromagnetic motors, without significant loss of power efficiency.
>This makes it ideal for portable products such as micro cameras,
>medical devices and biometric detection systems.
>
>SQUIGGLE micro motor features
>
>Precise: nanometer resolution
>Fast: variable speed from 1 =B5m/second to 10 mm/second
>Strong: models with up to 5 Newton force
>Tiny: as small as 1.8 x 1.8 x 6 mm
>Quiet and smooth
>Non-magnetic, vacuum and cryogenic options available

These have been around a few years - very expensive ISTR - hundreds of $ un=
til you get to serious
quantities.=20
Digikey have a few devkits=20
http://www.digikey.com/product-search/en/programmers-development-systems/ev=
al-and-demo-boards-and-kits/2622039?k=3Dsquiggle


--=20
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