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What is datum A?...
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I know some customers require a Gage R&R study on critical dimensions to verify repeatability and reproducibility of the measurement system used....
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I still think using 2 dials and cancelling out error from the datum feature on the controlled feature will cause you to accept bad parts.. What you are...
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LouisD I get that, but I'm talking about measurement accuracy, not a crash. If you pick a prehit distance that is far enough to not risk a crash, your...
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Datum A in this case would be the theoretically perfect cylinder that contains all of the elements of the cylinder that is being defined as datum A. ...
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No, it has nothing to do with accuracy either. Prehit is how far away from the hit point the tip starts from. For example, if you were just measuring...
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AnderSL, you are right. I'm looking at the ASME book right now....
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andrea_ABAZIA,
I agree with Ninja, use 0.4 mm/s touch speed in both programs for simplicity. I believe that Hexagon suggests a slow touch speed...
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Like this:
STARTUP =ALIGNMENT/START,RECALL:USE_PART_SETUP,LIST=YES
ALIGNMENT/END
MODE/MANUAL
...
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Then it will work fine. A few mm difference won't make a difference. Post some code if you want to try it and I'll help you out.
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Is your part always in the same place in relation to your table edges?
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Yes, you will have to run the manual alignment once to roughly teach the CMM where the part is. But once you've done that, you never have to do it again...
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I would use an external manual alignment if you have consistent fixturing. Create a separate program where you measure you're alignment features manually....
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No louisd, it doesn't confuse the two sides, thank goodness. I just replace the M_ with an S_ for my slave side....
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Excellent, thanks for that idea! It does tend to happen with my oldest program so what you're saying makes sense. I've updated it many times....
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