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  1. JesseLou

    Irregular pattern as a datum. How to define DRF origin???

    Yes. I know the tolerancing looks thin. I'm trying to help out the engineering dept with their drawings. They have quite a few greenhorn engineers and they say that they had hardly any GD&T and print drafting training. These were some initial ideas I came up with. My actual job is machining and...
  2. JesseLou

    Irregular pattern as a datum. How to define DRF origin???

    That helped.... some.. I still am not clear for inspection purposes. I am still not clear. When picking up datum-E on the CMM... I will pick up all 7 holes... then: 1. How or where do I tell the CMM software where the DRF origin is for Datum-E (locking 2 DOF) 2. How do I clock the pattern...
  3. JesseLou

    Irregular pattern as a datum. How to define DRF origin???

    Hey all, I can't find much information on this at all.... Even in the ASME standard.. Only a couple pages on patterns as datums. So... I have a irregular pattern that I am picking up the top of to make Datum-D and then I want to make the pattern itself Datum-E so we can check a few holes...

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