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Slot Width/Length Bonus?

blind829
I've attached a print and code of my program on v3.5MR2.

First question is why is PC-Dmis adding both bonus tolerances, width & length, together to calculate the true position bonus? I'm looking at a old CMM report of v3.7MR3 and it is only using bonus tolerance of the width to calculate the true position bonus...Is this a known problem in v3.5MR2?

Second, I don't fully understand boundary and if it's possible to dimension correctly in v3.5MR2...

Thanks for your help.
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  • You're good Matt, last couple questions.

    What "Hit Type" would the linear closed scan be? Edge, Vector, Surface, ect..

    Correct me if I'm wrong but you calculated your ±0.9 tolerance by splitting the 1.0mm positional tolerance in half, makes sense, and adding the tightest hole size tolerance, just to be on the safe side...Is that right?
    Yep, that's how I did it, 1/2 the TP and guessing that cad is mean size of slot, half the total size tol to each side.

    As for hit type..... Edge points with a surface sample will probably be the easiest way to go about it.

    IF YOU HAVE both sides of stock AND the edge between them, you could do a local alignment on it (level on surface around it and origin, slot length for rotate, center point for origins), then do vector points on the edge data. While it would take a lot longer to set up doing the local alignment, the scans will go a LOT QUICKER! Of course, if this is a flat piece, do a local alignment (level at least) and do edge points WITHOUT the sample hit. There's about 3 ways to skin this cat.
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  • You're good Matt, last couple questions.

    What "Hit Type" would the linear closed scan be? Edge, Vector, Surface, ect..

    Correct me if I'm wrong but you calculated your ±0.9 tolerance by splitting the 1.0mm positional tolerance in half, makes sense, and adding the tightest hole size tolerance, just to be on the safe side...Is that right?
    Yep, that's how I did it, 1/2 the TP and guessing that cad is mean size of slot, half the total size tol to each side.

    As for hit type..... Edge points with a surface sample will probably be the easiest way to go about it.

    IF YOU HAVE both sides of stock AND the edge between them, you could do a local alignment on it (level on surface around it and origin, slot length for rotate, center point for origins), then do vector points on the edge data. While it would take a lot longer to set up doing the local alignment, the scans will go a LOT QUICKER! Of course, if this is a flat piece, do a local alignment (level at least) and do edge points WITHOUT the sample hit. There's about 3 ways to skin this cat.
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