At 13.15 2010.05.17, you wrote:
>Michael Rigby-Jones wrote:
>>
>>> often for
>>> a smaller cost), but very interesting nonetheless:
>>>
>>> http://www.pcbmotor.com/default.aspx?CMSID=114
>>>     
>>
>>
>> This looks very much like the ultrasonic motor that Canon have used for
>> many years in their better camera lens.
>>
>>   
>I don't think this is new at all. I'm sure I saw something like this 
>long ago.

All depends on what we mean with "new" and "long ago".

The oldest reference I can find to this (patented) technology is october 2009.

Ultrasonic motors in common have only the use of piezoelectric technology, but
they work very differently.

White paper on PCBMotors:
http://www.scribd.com/doc/16154509/pcbmotor

Regards,
Mario

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