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Free Plan: A Simple to use Dividing Device

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Free Plan: A Simple to Use Dividing Device

Free Plan: A Simple to Use Dividing Device

This dividing device takes an unconventional approach. Designed by Al Longworth, it appeared in MEW issue 6, August/September 1991.

Neil Wyatt05/09/2014 14:19:55
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73 articles

This plan from issue 6 of MEW features an unusual approach to dividing by Al Longworth. Enjoy!

Simple to use Dividing Device

Neil

Michael Gilligan05/09/2014 20:10:03
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12768 forum posts
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Thanks Neil

A great choice ... it's very interesting device.

Keep 'em coming !!

MichaelG.

Neil Wyatt05/09/2014 20:26:01
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Moderator
15700 forum posts
659 photos
73 articles

I know I have at least one fan of these plans! It is rather unusual isn't it.

One using change wheels or a standard dividing had may have cyclical errors, but these should always even out to zero after a full rotation. This one produces even spacing except for any accumulated error in the final hole.

It must have worked well or MES wouldn't have offered to stock the kit of parts. I suspect it is sensitive to the quality of the build and care in use.

Neil

Michael Gilligan05/09/2014 21:01:07
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12768 forum posts
553 photos

Neil,

I have the hard-copy already; but these PDF plans are very easy to view on the iPad.

This device is interesting on a couple of counts:

  • The chordal method is one of the earliest used by the "Instrument Makers" when setting out quadrants, etc. [have a look at Royal Observatory, Greenwich]
  • The Brake mechanism is nicely done, and adaptable to other uses.

These days, a Stepper Motor is probably a better place to start ... but we shoud not lose sight of the alternatives.

MichaelG.

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