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Parallelism calculation method

Leandre Vienat
Hello

I need to perform a parallelism with external material calculation method how can I do?
I can't find a compute option for parallelism. In the help it seems to me that I found that flatness and parallelism are in Chebyshev.
Can someone give me some clarification on this? PC-DMIS 2019R2 version
Thanks in advance

My best regards

Léandre Vienat
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  • When measuring parallelism, why does it matter what plane you select first? shouldn't the parallelism between two planes measure the same no matter what plane is selected first?

    Don't confuse parallelism with angle !!!!!!!
    If you have 2 planes with exactly 180° between vectors, one with a flatness of 0, the other with a flatness of 0.1 mm, if you take the first as a reference (so second select !), you will have a parallelism of 0.1, in the other case a parallelism of 0.
    You can calculate them easily :
    ASSIGN/V1=DOT(PL1.HIT[1..PL1.NUMHITS].XYZ-PL2.XYZ,PL2.IJK)
    ASSIGN/V2=DOT(PL2.HIT[1..PL2.NUMHITS].XYZ-PL1.XYZ,PL1IJK)
    ASSIGN/PARAL1=ABS(MAX(V1)-MIN(V1))...........................parallelism of PL1 from PL2
    ASSIGN/PARAL2=ABS(MAX(V2)-MIN(V2))...........................parallelism of PL2 from PL1
    In addition, the reference plane should be L2 constraint in ASME, minimax in ISO.
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  • When measuring parallelism, why does it matter what plane you select first? shouldn't the parallelism between two planes measure the same no matter what plane is selected first?

    Don't confuse parallelism with angle !!!!!!!
    If you have 2 planes with exactly 180° between vectors, one with a flatness of 0, the other with a flatness of 0.1 mm, if you take the first as a reference (so second select !), you will have a parallelism of 0.1, in the other case a parallelism of 0.
    You can calculate them easily :
    ASSIGN/V1=DOT(PL1.HIT[1..PL1.NUMHITS].XYZ-PL2.XYZ,PL2.IJK)
    ASSIGN/V2=DOT(PL2.HIT[1..PL2.NUMHITS].XYZ-PL1.XYZ,PL1IJK)
    ASSIGN/PARAL1=ABS(MAX(V1)-MIN(V1))...........................parallelism of PL1 from PL2
    ASSIGN/PARAL2=ABS(MAX(V2)-MIN(V2))...........................parallelism of PL2 from PL1
    In addition, the reference plane should be L2 constraint in ASME, minimax in ISO.
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