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- From: palmer@cco.caltech.edu (David M. Palmer)
- Newsgroups: sci.philosophy.tech,sci.physics,sci.skeptic
- Subject: Re: Measurement & Precision
- Message-ID: <1dpg74INNp4n@gap.caltech.edu>
- Date: 10 Nov 92 23:22:12 GMT
- Article-I.D.: gap.1dpg74INNp4n
- References: <1992Nov2.043143.24298@augean.eleceng.adelaide.edu.AU> <1dck8fINNgie@agate.berkeley.edu> <1992Nov10.121329.7384@augean.eleceng.adelaide.edu.AU>
- Organization: California Institute of Technology, Pasadena
- Lines: 33
- NNTP-Posting-Host: alumni.caltech.edu
-
- 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.
-
- --
- David Palmer palmer@alumni.caltech.edu
-