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Pitfalls of using the granite (NOT THE PART) as a Datum Alignment Feature

All,
I'm working on a project and remember seeing a tech article many years ago about the dangers of using the granite plate and not the part as a component of your part alignment. Does anyone have any idea where to find that article? Any help would be appreciated! Thank you, Erich
Parents
  • You could also lift the part off of the granite high enough to probe the underside of the part.
    Or, if it's not a very big part, a machined block, like a 1-2-3/4-5-6 block.
    Or, if you can rotate the part onto the side, or flip it.
    Or, if you can't do any of that, probe the granite enough to verify the flatness of the area you need to use.
Reply
  • You could also lift the part off of the granite high enough to probe the underside of the part.
    Or, if it's not a very big part, a machined block, like a 1-2-3/4-5-6 block.
    Or, if you can rotate the part onto the side, or flip it.
    Or, if you can't do any of that, probe the granite enough to verify the flatness of the area you need to use.
Children
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