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Thread: Circle division with no rotary table

  1. #1
    Supporting Member Christophe Mineau's Avatar
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    Jul 2014
    France, Brittany !
    Thanked 1,424 Times in 428 Posts

    Christophe Mineau's Tools

    Circle division with no rotary table

    I wanted to make my own rotary encoder, using quadrature IR Led emitters and receivers, so I needed to make a small disk with 54 holes in the perimeter. (54 because of some design constraints)

    I don't have any rotary table, and the angle 360/54=6.66 is quite odd and does not suite my index plate on the lathe.
    In such situation, my solution is always to rely on my inkjet printer and my favorite CAD software.

    It is really amazing the accuracy we can achieve with a simple inkjet printer, and one big quality of this method is that you never accumulate errors.
    Even if a single stroke can have maybe 1 or two tenth of a millimeter of error, the error is not repeated as if you were using for example a caliper to mark from point to point.

    Here is how I did:

    you can notice the small pencil index on the edge of the disk, which I align successively on the purple spokes of the drawing.

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  2. The Following 5 Users Say Thank You to Christophe Mineau For This Useful Post:

    DIYer (03-23-2017), Moby Duck (03-23-2017), rlm98253 (03-23-2017), Saxon Violence (01-02-2019), Seedtick (03-23-2017)

  3. #2
    Content Editor
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    DIYer's Avatar
    Join Date
    Aug 2013
    Thanked 1,483 Times in 1,331 Posts

    Thanks Christophe Mineau! We've added your Circle Dividing Method to our Measuring and Marking category,
    as well as to your builder page: Christophe Mineau's Homemade Tools. Your receipt:

  4. The Following User Says Thank You to DIYer For This Useful Post:

    JD62 (03-23-2017)

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