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Stephen1-Visitor
1-Visitor
April 24, 2009
Question

WF5.0 absolute accuracy only?

  • April 24, 2009
  • 4 replies
  • 1443 views

Can anyone confirm the rumor... with documentation, that WF5.0 will have accuracy absolute only? If so I'm curious what the default value is? Anyone currently using absolute now ? if so what value ? any conflicts or problems ?

Thanks

Steve

    4 replies

    M
    magnus.salomons15-Moonstone
    15-Moonstone
    April 27, 2009
    No, Relative seems to be default, at least on Pre-Production. It is now listed in new GUI Model Properties. It's a bit strange. If I change a model that was created with Relative accuracy I can only change the value. However if I change a model created with Absolut accuracy I'm allowed to change to Relative. If I change from Absolute to Relative I'm also allowed to change back to Absolute. This gotta be a bug. See attached pics.
    D
    dgschaefer21-Topaz II
    21-Topaz II
    April 27, 2009
    I've worked with absolute accuracy pretty much exclusively for the 12
    years I've used Pro|E, with few issues. In fact, I tend to have more
    issues when I use a client file with relative accuracy. We use an
    absolute setting of 0.0001".

    Absolute can slow regen times if set too tight, but I've found it to
    result in more robust and predictable models. With relative accuracy,
    the effective accuracy of the model varies with the model size. If
    during development, a model changes size dramatically, features can fail
    unexpectedly.

    For example, say the design is simplified and two parts are combined
    into one. You open one model and insert early into the model tree new
    features to expand the part to include the geometry of the other.
    Because of the increased model size, the effective accuracy of the model
    is increased. That means the smallest allowable edge is larger and
    later features like draft or rounds which created small details are no
    longer within the new accuracy limits and they fail. It can be
    maddening to try to figure out why.

    The flip side can be true as well. If a model gets dramatically smaller
    by changing early features, the smallest allowable edge is decreased and
    now rounds may regen differently, creating smaller detail than was
    allowable before.

    Doug Schaefer
    S
    Stephen1-VisitorAuthor
    1-Visitor
    April 29, 2009
    Thanks to all that replied! Turns out PTC will NOT have Absolute Accuracy in WF5 as the default, it will remain untouched but they are looking at this for future releases. Absolute Accuracy seems to be the way to go when using Pro/NC.

    Steve

    S
    sneg36911-Visitor
    1-Visitor
    April 29, 2009
    All:



    I am trying to dimension a 3d Isometric view. Pro does indeed creates a
    dimension, however, it is not the correct value. I have allowed 3d
    dimensioning in my config file, but does not have any affect. What am I
    missing?



    Thanks

    Kelly

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