Re: [ATM] Telescope direct drive

["Olivier Biot" <olivier.biot@versateladsl.be>]

This is interesting. Piezomotors are already being promoted in the industry 
nowadays, they're no NASA and USAF privilege anymore :)

How about providing tracking with a piezo motor and slewing with a stepper?

Best regards,

Olivier

----- Original Message ----- 
From: Arjan te Marvelde

> The low cost they claim does not match my idea of low cost.
> I like the Nanomotion one though: http://www.nanomotion.com/
>
> /Arjan
>
>> Telescope direct drive may now be possible using a new kind of 
>> piezomotor.
>> A piezomotor is made using PZT ceramic materials and can operate at
>> frequencies of 130Khz with up to 130mm/sec linear velocities. No need for
>> stepper motors, servo motors, worm gears, cable drives, roller drives,
> band
>> drives ,harmonic drives, or other types of gear reduction. A piezomotor
> can
>> directly move a circular disc, circular sector or produce direct linear
>> motion.  Some commercial companies that produce PZT piezomotors are EDO
>> corp., Mad City Labs Inc., Nanomotion Inc., Physik Instrumente L.P. 


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