Strange length loss after trimming a model
Altair EmployeeHello,
I have a half cylindrical structure trimmed into two parts (as shown in the picture).
When I measured three parallel edges (point 1-2, 3-4, 5-6), I found the edge 3-4 in the middle has different length, 1.557mm, from the rest two (1-2, 5-6), 1.558mm. The difference is small, but I'm perplexed about length inconsistency because the half cylinder is simply trimmed with a vertical line in the middle. It is a simple trim. The angles 124, 243, 431, 312 are all 90 degree. Edge 1-3 and 2-4 have equal length. I just cannot understand why the edge 3-4 is shorter than the edge 1-2 after trimming. It does not make sense mathematically. Any thoughts will be appreciated, thanks!
Ryan
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Answers
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Hello Ryan,
i have tested it with a surface and for me it works perfectly.
Maybe you have attached geometry and/or the merge tolerance for geometry is still high. Check options->geometry->cleanup tol, must be useful with your model size.
Regards,
Mario
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Mario, what value setting might be proper for cleanup tol according to model size?
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Hi,
i'm still working with millimeter, so i'm using for geometry cleanup tolerance 0.01 (or 0.1 for larger models) and for node tolerance 0.1
But it is by you to choose a good value.
Regards,
Mario
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