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Taper per inch

Mike Rivard
I have a part that has a call out for taper on diameter per inch of length, lets say .0005 tol. So from what I gather this is the major subtract the minor divided by the length and this distance can't deviate more then the .0005 tolerance it's given. how would you guys go about dimensioning this. I don't believe I can get the dia. of the large end, I can get the small end though. I can try and provide picture, btw I worked out he math for what the angle needs to be but its extremely tight and would say unattainable. less then a minute of tolerance.
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  • (A comment in report explaining what you did for either of these ideas)

    You could use formulas, either by "ASSIGN" or directly into an offset points (F2 in one of the blue measured values).

    Alternatively, 2d angles on measured lines.

    Alternatively, just report a cone angle with comment explaining equivalency (not sure how accurately PC-DMIS calculates extremely acute cones).

    Oh, or you could do intersecting offset lines, exactly an inch apart, construct intersecting (pierce) points on the skin of this shaft, and simply report a 2d distance of those intersecting/pierce points.
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  • (A comment in report explaining what you did for either of these ideas)

    You could use formulas, either by "ASSIGN" or directly into an offset points (F2 in one of the blue measured values).

    Alternatively, 2d angles on measured lines.

    Alternatively, just report a cone angle with comment explaining equivalency (not sure how accurately PC-DMIS calculates extremely acute cones).

    Oh, or you could do intersecting offset lines, exactly an inch apart, construct intersecting (pierce) points on the skin of this shaft, and simply report a 2d distance of those intersecting/pierce points.
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