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- From: dabbott@augean.eleceng.adelaide.edu.AU (Derek Abbott)
- Subject: Re: Measurement & Precision
- Message-ID: <1992Nov18.021112.13489@augean.eleceng.adelaide.edu.AU>
- Organization: Electrical and Electronic Eng., University of Adelaide
- References: <1dck8fINNgie@agate.berkeley.edu> <1992Nov10.121329.7384@augean.eleceng.adelaide.edu.AU> <1dpg74INNp4n@gap.caltech.edu>
- Date: Wed, 18 Nov 1992 02:11:12 GMT
- Lines: 37
-
- In article <1dpg74INNp4n@gap.caltech.edu> palmer@cco.caltech.edu (David M. Palmer) writes:
- >dabbott@augean.eleceng.adelaide.edu.AU (Derek Abbott) writes:
- >
- >>PS. BTW, it would be an interesting to put 5 or 6 scientists/engineers on
- >>a desert island (rich in ores) with the goal of producing a 5um accuracy stepper
- >>motor from stratch. They are allowed any text books they like and we feed them
- >>well, so they can work on it full time.
- >
- >>It would be interesting to see if they could do it within their life time.
- >
- >>Do people think it would necessarily take a number of generations?
- >
- >>Also recording the minimum number of steps it took to "bootstrap" modern
- >>precision out of stone age tools would be a fascinating bit of trivia.
- >
- >Piece of cake. (Assuming you have the right kind of ores.)
- >Make a 5 micron/step 'inchworm' motor. (An inchworm motor works
- >using the expansion and contraction of piezo-electric crystals
- >to make the system 'walk'. They are used in probe positioning for
- >atomic resolution scanning-probe microscopes (e.g. scanning tunnelling
- >microscopes.))
- >
- >Wire you can beat out of native gold. Batteries might be a problem,
- >but you could make a generator out of magnetite and wire. Use quartz
- >for the piezo-electric components. Polished stone for the rails.
- >
- >Voila, within a year. Less if the team includes a master blacksmith who
- >can do ab initio smelting of metals from ores. A lot longer if you have
- >a management team.
- >
- >All it takes is a little Conneticut Yankee ingenuity.
- >
-
- Hmmmmmm, I don't think it's quite as simple as that. The whole measurement
- technology itself has to be bootstrapped up, measurement standards reinvented
- etc etc for them to be able to measure the positioning performance of the
- motor.
-