.006mm flatness
.006mm flatness
(OP)
I have a part that has a flatness call out of .0002in to itself and a .002in perpendicularity to datum A over the surface of a slot that measures .275in x .551in x .039in deep. Our customer says that the flatness is out by +.0002. I have tried to repeat that but I am having trouble with setting this up and to be able to check the flatness of this feature to itself. The perpendicularity to datum A is is good with in .0005 - .001 depending on the part. does anyone have any suggestions to help me out?
Thank You
Stephen Farrell
Quality Manager
Thank You
Stephen Farrell
Quality Manager





RE: .006mm flatness
What is your question? Are you wanting help on how to make the measurement? Have you looked at a non-contact profilometer?
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: .006mm flatness
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: .006mm flatness
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: .006mm flatness
----------------------------------------
The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: .006mm flatness
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: .006mm flatness
Check out dgallup's reply. If you have a computerized device that can probe or scan a surface, then the flatness is just an absolute-value comparison of the high points and low points (peaks and valleys). It is not centered around anything, so there is no positive or negative connotation to the flatness reading. And there's no datum for flatness, so it ignores any tilt of the surface.
If you're stuck with more primitive inspection equipment, then flatness might be measured with a dial indicator, but since you said .0002 I hope you have a CMM or profilometer or perthometer (never hear of that one; it must be Mahr's trademark name).
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: .006mm flatness
Thank You
Stephen Farrell
Quality Manager