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when you import parts you can have this option set to a value you find is consistent in bringing in the part with the best condition, such as being solid with as few surface flaws as possible. The value is arbitrary. However, I suggest you not set this and that you detect the actual part accuracy, whether relative or absolute, and set the value accordingly. There is probably very few parts that have an absolute accuracy to what you set it to. In contrast, If you know the absolute accuracy setting is consistently set then you can set this value and the part accuracy will match the value of the import.
Make sure you have also set the following:
enable_absolute_accuracy yes- so that you can change from the default relative accuracy used by pro-e
Pro/E uses iterative solvers in it's algorithms (e.g. Newton-Raphson) and "Part accuracy" is theparameter Pro/E uses to converge them.
There are 2 flavors of "part accuracy" - relative and absolute. Relative is the ratio of the smallest edge in your model to the length of the bounding box diagonal - this is Pro/E default (.0012).
Absolute is, ideally, the length of the smallest edge in your model ("small edge" geom checks occur whenabsolute accuracyis set higher than the smallest edge).
For part merging (not surface merging) and cutout absolute accuracies must be the same for all models involved - I do this a lot so I alwayswork withabsolute and not relative (if relative is set then absolute is free to change and merge failures can occur as a result).
Also, the smaller this value the longer Pro/E will take to converge (solve) and file size goes up accordingly.
PS This value is not arbitrary... Edited by: dougr
the default relative accuracy, and certain prescribed absolute accuracies, may have a reason behind their value. However, I consider the value a persons sets for this config option to be arbitrary in that you can set it as you see fit, and for what is appropriate to your situation.
rant:
pro-e has just about the worst import capabilities that I have seen. Even a part made in pro-e, turned into iges or step, and then re-imported can sometimes have surface flaws or other issues. I consider that unnacceptable. absolute accuracy cad software can do far better in data exchange and I wish pro-e would figure out how to handle that. We get import data from almost every software type and whatever pro-e is doing it fails in more than 50% of the cases to make a complete part without surface flaws. I do not have time to use the import data doctor to tweak all the flaws and possibly change the shape compared to the original geometry. I can make a neutral file for pro-e in "other" software and be days ahead of coworkers still trying to move vertexes and rebuild surfaces ( I do that too, but sheesh)
I try a mixture of accuracies to test the import including relative, absolute, and picking up the actual absolute value in parts made with absolute. Sometimes the value is hidden in the file and can be read by opening the file. Otherwise, you can import the part, set the accuracy by checking the accuracy of the import and then set the accuracy to the value that is set. (pro-e will tell you the number when you check the file)
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