We've got some plates to check the flatness and parallel of and we've got a total tolerance of .00011 (yes, that's one tenth and ten millionths).
I've been asked checking it with a CMM, it's about a one square foot plate and I'm taking about 200 hits, but I'm a little fishy our CMM is capable of such tight tolerance and having trouble convincing everyone else. I mean, our volumetric error for the machine is .0002 (almost twice the tolerance!), but I keep getting "it can't all be within that square foot" and "it use to check good and now all of the sudden we can't get a good reading, that can't be it".
We've got a Sheffield Endeavor 9.12.7 and a B&S One, both running 3.7MR2.
I just want to know what you guys would use to check flatness ACCURATELY so I can prove or disprove the CMM's results. What do you think? The company would probably buy whatever it is we need if we don't have the capability right now, as long as it's not outrageously expensive...
Thanks,
Jim
I've been asked checking it with a CMM, it's about a one square foot plate and I'm taking about 200 hits, but I'm a little fishy our CMM is capable of such tight tolerance and having trouble convincing everyone else. I mean, our volumetric error for the machine is .0002 (almost twice the tolerance!), but I keep getting "it can't all be within that square foot" and "it use to check good and now all of the sudden we can't get a good reading, that can't be it".
We've got a Sheffield Endeavor 9.12.7 and a B&S One, both running 3.7MR2.
I just want to know what you guys would use to check flatness ACCURATELY so I can prove or disprove the CMM's results. What do you think? The company would probably buy whatever it is we need if we don't have the capability right now, as long as it's not outrageously expensive...
Thanks,
Jim
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