Craftsman Micro-Positioning Device ref chart

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  • kirkroy
    Established Member
    • Feb 2007
    • 343
    • Brunswick, MD

    Craftsman Micro-Positioning Device ref chart

    I made up a reference chart for the Craftsman Micro-Positioning Device (probably works with the ryobi badged one as well, I assume they're the same) for my own use and thought someone else might find it useful as well. It'll print nice if you use a fixed pitch font (e.g., courier).

    Shop Sears for appliances, tools, clothing, mattresses & more. Great name brands like Kenmore, Craftsman Tools, Serta, Diehard and many others.


    1/4 turn = 1/64
    1/2 turn = 1/32
    3/4 turn = 3/64
    1 turn = 1/16
    1 1/4 turns = 5/64
    1 1/2 turns = 3/32
    1 3/4 turns = 7/64
    2 turns = 1/8
    2 1/4 turns = 9/64
    2 1/2 turns = 5/32
    2 3/4 turns = 11/64
    3 turns = 3/16
    3 1/4 turns = 13/64
    3 1/2 turns = 7/32
    3 3/4 turns = 15/64
    4 turns = 1/4
    4 1/4 turns = 17/64
    4 1/2 turns = 9/32
    4 3/4 turns = 19/64
    5 turns = 5/16
  • LCHIEN
    Internet Fact Checker
    • Dec 2002
    • 21010
    • Katy, TX, USA.
    • BT3000 vintage 1999

    #2
    Originally posted by kirkroy
    I made up a reference chart for the Craftsman Micro-Positioning Device (probably works with the ryobi badged one as well, I assume they're the same) for my own use and thought someone else might find it useful as well. It'll print nice if you use a fixed pitch font (e.g., courier).

    Shop Sears for appliances, tools, clothing, mattresses & more. Great name brands like Kenmore, Craftsman Tools, Serta, Diehard and many others.


    1/4 turn = 1/64
    1/2 turn = 1/32
    3/4 turn = 3/64
    1 turn = 1/16
    1 1/4 turns = 5/64
    1 1/2 turns = 3/32
    1 3/4 turns = 7/64
    2 turns = 1/8
    2 1/4 turns = 9/64
    2 1/2 turns = 5/32
    2 3/4 turns = 11/64
    3 turns = 3/16
    3 1/4 turns = 13/64
    3 1/2 turns = 7/32
    3 3/4 turns = 15/64
    4 turns = 1/4
    4 1/4 turns = 17/64
    4 1/2 turns = 9/32
    4 3/4 turns = 19/64
    5 turns = 5/16

    That's a good idea, why don't you also put decimal fractions, very useful if you use calipers to check your rip width and need to creep up 0.025"
    (Hint 1/64th = .016 and 1/32 = .031 so 0.025 would be about 1 full mark and 2/3rd of a mark.
    I've done this kind of work before with my micropositioner and the incremental fractions marks will get you better than .005", if you round to the nearest half mark then you can get to better than .010"

    I'm not really saying everyone needs to get better than 1/64th but having the decimal equivalent can save a trip to the calculator if you are checking your width with calipers.
    Last edited by LCHIEN; 11-26-2007, 12:40 PM.
    Loring in Katy, TX USA
    If your only tool is a hammer, you tend to treat all problems as if they were nails.
    BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

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    • kirkroy
      Established Member
      • Feb 2007
      • 343
      • Brunswick, MD

      #3
      Sure, that's easy enough since I did it in Excel. I'll just post up the Excel file.

      Update, with decimals:

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