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Seeking point densities for on-machine inspection

Seeking point densities for on-machine inspection

Seeking point densities for on-machine inspection

(OP)
I am seeking standards or specs that will answer the question, "How many points are required to be able to inspect and specify a surface?" I am interested in on-machine inspection, although info relating to coordinate measuring machines (CMMs) might provide a hint. I have access to ASME Y14.5 (Dimensioning and Tolerancing) but that does not specifically address this issue (or I haven't found it, if it does). Ultimately, I want to obtain an accurate assessment of surface profile variations.

Thank you.

Dale C.
Library manager

RE: Seeking point densities for on-machine inspection

3 points define a plane or surface.  How accurate do you want it?   

RE: Seeking point densities for on-machine inspection

(OP)
NomLaser,

Thanks for the note. My engineer tells me this is not going to do it, and asked me to say that we are talking about a spline curve profile here, not a planar surface.

-Dale

RE: Seeking point densities for on-machine inspection

(OP)
Thanks, I will try there.

RE: Seeking point densities for on-machine inspection

I don't want to add to any confusion, but I think that forum286: QC, Inspection & Testing engineering may be a better place for this question.

"Good to know you got shoes to wear when you find the floor." - Robert Hunter
 

RE: Seeking point densities for on-machine inspection

Good point.  Didn't realize that they had their own forum

RE: Seeking point densities for on-machine inspection

(OP)
There are a sometimes bewildering array of forums on this great site. I will try this one, too, if nothing comes out of the GD&T forum. Thanks.!

-Dale

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