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Unilateral Profile help

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By [Am...] ,
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[Am...]

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Hi, so I have something happening and I can't explain what is going on with the results. I have a couple unilateral profile callouts .020 U .020 to ABC. Every time that I have the profile in the result I get is always an even .0200 thats how it shows on the report too. However looking at the surface with the CAD evaluation nothing seems out of the ordinary the deviations vary through the surface and are under the tolerance frame and are definitely not using up the whole tolerance.

The only time that I get an actual number is when the profile is out. Ive played around with it a bit now have several profiles that when set up as a normal profile have actual values and then when I switch them to unilateral or even bilateral with un equal distribution they all change to .0200. Any idea about whats going on here?
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[Ma...]

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Any screenshot with CAD evaluation and deviations will be helpfull.

I sometimes get wrong profile number ( aka 3.4mm ) but on CAD eval it wasn't more then 0,14 - was something wrong on element alignment
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[Ch...]

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If possible I would also make sure you have installed the latest Service Pack for your particular version of CALYPSO. That would potentially take care of any bugs that could be present.

As the others said it would be nice to see the CAD presentation screen shot with min/max banners. Could it be that the result is close to 0.020 and not enough decimals are being displayed? If so it could be rounding down to a even 0.020. For example 0.0201 showing as 0.020. Do all profiles even for other features do the same?
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[Ri...]

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Tom is correct.

A unilateral would look more like this.
659_05685b47ccada850629628c704e7fbee.png
Typically you will see if when they draw the model at MMC or LMC, and you will need to select if the nominal contour is inside or outside.
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[Am...]

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But in this case Bilateral unequal with all tolerance on outside is the same as unilateral outside even going by the calculations in the PDF Tom provided the calculation is exactly the same.

By the way I figured out what my issue if anyone is curious. I had a part of the curve skipped to avoid my fixture by making the strategy one segment 1-100 and the second segment 120-250. Apparently because nominals 101-119 still exist calypso counts these parts of the curve as being at nominal CAD geometry instead of there being no points there which puts my profile at .0200 for the line because that was always the max since none of my part goes inside the workpiece. I went and deleted the nominals from my list and that fixed the problem.

Kind of interesting to figure out that this is how it works as its something them doesn't really come up on a normal profile since having points at nominal would go completely unnoticed since that will never be your result on a equally disposed profile.
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[Ma...]

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If you have it as curve, you can simply skip evaluation for some points instead of deleting nominals. With this I eliminate start/before end points.
It's somewhere in middle of eval window - button.
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