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Core Pin alignment

Hello,

this is my first post and I just have a basic experience with CMM's and PC-DMIS. I am having a hard time figuring out how to align a core pin (see picture below). I have the .IGS model uploaded and I tried to align the part using a cone and a circle. Then I was trying to measure an inner diameter of the core pin the probe on the 3D model was in the correct position (height) but the physical probe way far from the core pin in the Z axis (height).So I guess there is an alignment problem. I used a cone because the outer section of the core pin have a 0'' 34' dft in the surface. Any suggestion how to align the core pin?
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  • If you're not concerned with the clocking of the pin...and all you want is that inside diameter.... and (assuming you have no experience using iterative alignments)...I would:

    Measure the inside diameter
    Measure 1 point on the top
    Manual align: point level Z+...circle X and Y origin...point Z origin
    This clears up manual alignment

    Then hit DCC mode...do your clearance plane and whatever..

    4 hit plane on top
    ID cylinder at least 5 hits per level at 3 levels
    Level cylinder to Z+
    cyl X and Y origin
    pln z origin

    Once aligned, measure your part.

    I would measure AT LEAST three ID circles...equally spaced. Report the diameter for each circle. I would also construct the circles together as a cyl & report that diameter as well.


    Hope this helped.
Reply
  • If you're not concerned with the clocking of the pin...and all you want is that inside diameter.... and (assuming you have no experience using iterative alignments)...I would:

    Measure the inside diameter
    Measure 1 point on the top
    Manual align: point level Z+...circle X and Y origin...point Z origin
    This clears up manual alignment

    Then hit DCC mode...do your clearance plane and whatever..

    4 hit plane on top
    ID cylinder at least 5 hits per level at 3 levels
    Level cylinder to Z+
    cyl X and Y origin
    pln z origin

    Once aligned, measure your part.

    I would measure AT LEAST three ID circles...equally spaced. Report the diameter for each circle. I would also construct the circles together as a cyl & report that diameter as well.


    Hope this helped.
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