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Recent content by Einzel

  1. Einzel

    Calculating TP of datum pattern?

    I probably should've phrased my error sentence differently. I meant error *from* the basic. i.e. the measured distance is 9.8 then each hole would have a ToP of 0.2. And I was used to a 2D ToP in the past mostly because our software, controllers, and machines were so aged that asking for more...
  2. Einzel

    Calculating TP of datum pattern?

    The tolerance was excluded as I was trying to get a spatial explanation, primarily (and also cause I forgot to add it to this example). I was mainly concerned to know if the holes were measured as 3D features rather than the usual 2D circle on a base plane as I'm more used to. My understanding...
  3. Einzel

    Calculating TP of datum pattern?

    Given the attached example, how would the true position tolerance be calculated on the pair of thru holes? Is it simply the error in their linear basic distance or does it have to do with their three dimensional forms (i.e. perpendicularity as well)? And a follow-up: where would the alignment be...

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