Piezoelectric Stage for nanometer level precision
Re: Piezoelectric Stage for nanometer level precision
mawyatt2002 wrote:
Awhile back the surplus market made some Physik Instrumente piezoelectric devices available. The devices offer the potential for extreme resolution and high precision when operated "Closed Loop" with position feedback. The complete OEM Closed Loop controllers/drivers/amps are very expensive, so an effort began to develop a custom solution at a much lower cost. One solution is a full Custom Complete Closed Loop system adaptable to various piezoelectric stages (P601K, P603K for example), another was a Custom Controller to interface with the OEM P603K Driver/Amp which are available on eBay at reasonable costs. Both operate from a Raspberry Pi with a single +12V at <1/2 amp supply.
Pretty slick....
If I were doing this, I think I'd just wildly gear-down a stepper... perhaps to drive a movement extracted from a cheap micrometer (e.g., like this ). Less driver circuitry needed, but a bunch of 3D-printed parts for mounting.
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