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MorlockP's profile
ⓘ Dogs don't have thumbs
ⓘ Dogs don't have thumbs
ⓘ Dogs don't have thumbs
@MorlockP

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ⓘ Dogs don't have thumbs

@MorlockP

Two-time Prometheus award-winning hard science fiction author. https://www.amazon.com/dp/B005JPPMS6  Learn how to homestead https://www.amazon.com/dp/B093BC3K1T 

Aristillus Crater, Luna
amazon.com/dp/B005JPPMS6
Joined June 2012

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    1. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      ⓘ Dogs don't have thumbs Retweeted ⓘ Dogs don't have thumbs

      30/ I may have 90% answered my own question at the very beginning.https://twitter.com/MorlockP/status/859033195307835392 …

      ⓘ Dogs don't have thumbs added,

      ⓘ Dogs don't have thumbs @MorlockP
      1/ Talking about threads: yes, I could take a steel cylinder, a strip of paper, and a file, and make a thread. And it could be decent.
      1 reply 0 retweets 4 likes
    2. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      31/ So we know how to create a straight edge ( f = g = h). Given a cylinder (which is easy to boostrap bc a lathe takes a form and ...

      1 reply 0 retweets 3 likes
    3. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      32/ generates the three dimensional revolution of it, i.e. straight edge -> cylinder or cone), we can wrap straight edge onto the cylinder

      1 reply 0 retweets 3 likes
    4. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      33/ and it's an elementary geometric proof that the angle that the edge makes vs circumference A is the same angle it makes vs circumf B

      1 reply 0 retweets 3 likes
    5. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      34/ bc the circumference at point A is a parallel line to the circumference at point B (non Euclidean space, obviously!)

      1 reply 0 retweets 3 likes
    6. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      35/ to whit, the old "a line that intersects paralllel lines creates corresponding angles" proof (not axiom?) http://www.mathnstuff.com/math/spoken/here/2class/260/trans.htm …

      1 reply 0 retweets 3 likes
    7. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      36/ which still holds in the simple non Euclidean space we're talking about.

      1 reply 0 retweets 3 likes
    8. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      37/ So we can create the thread pitch we want with simple compass work (bisection is legal, trisection is not), but we can also get 60°

      1 reply 0 retweets 2 likes
    9. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      38/ and we can then align a straightedge along this angle and wrap it, and then we get a constant thread. Now it's a "simple" matter of

      1 reply 0 retweets 2 likes
    10. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
      Replying to @MorlockP

      39/ building some sort of pantograph machine which can take these angles and straight edges off references and apply to spinning workpiece

      1 reply 0 retweets 2 likes
      ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017

      40/ which is actually a tricky bit of design and machining, and will add inherent errors to output...but it is, in principle, doiable

      6:45 AM - 1 May 2017
      • 3 Likes
      • Vague & Candid Mark Corrigan, Esq. nzc
      2 replies 0 retweets 3 likes
        1. New conversation
        2. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
          Replying to @MorlockP

          41/ Now I want an NEA grant to fund me building such a thing. I'd put it in a gallery. Patrons can turn a crank and slowly advance cutter

          2 replies 0 retweets 3 likes
        3. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
          Replying to @MorlockP

          42/ Which, over time, turns a rough piece of rod into a toolroom-quality screwthread.

          3 replies 0 retweets 2 likes
        4. Show replies
        1. New conversation
        2. Ghost Waffle‏ @Octapode 1 May 2017
          Replying to @MorlockP

          Once you make two threads, you can average them to make the third higher precision. IIRC Da Vinci designed a machine for that.

          2 replies 1 retweet 3 likes
        3. ⓘ Dogs don't have thumbs‏ @MorlockP 1 May 2017
          Replying to @Octapode

          so averaging is a powerful technique. I was reading up on Whippletrees the other night in bed https://en.wikipedia.org/wiki/Whippletree_(mechanism) … bc I had a thought

          1 reply 0 retweets 1 like
        4. Show replies

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