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JWayman1-Visitor
1-Visitor
August 24, 2005
Question

Fw: Chamfer Dimensioning Scheme

  • August 24, 2005
  • 7 replies
  • 2181 views
Sorry, got my stupid head on - I forgot to say I'm using Wildfire II

Thanks,

    7 replies

    unknown11-Visitor
    1-Visitor
    August 24, 2005
    I found a config.pro option called default_chamfer_scheme. It is a
    "hidden" option. Whatever that means. When I put that option in the
    option pop-up box and do a find on it, nothing shows up.

    Anyone know how to handle "hidden" config options?

    I would be nice to change the chamfer default to 45 x D.
    jschmehl1-Visitor
    1-Visitor
    August 24, 2005
    I found it!!!! Ureka!!! After years and years of questioning PTC and
    it was there the whole time!!!

    default_chamfer_scheme 45xd

    Add/change....apply and you're off!!!!

    aldebot751-Visitor
    1-Visitor
    August 24, 2005
    That is still not right that is the same as config option
    chamfer_45deg_dim_text set to asme/ansi,



    Jael B. Aldebot-Brousseau

    Designer, Opto-Mechanical Engineering



    BAE SYSTEMS

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    jschmehl1-Visitor
    1-Visitor
    August 24, 2005
    I was answering the part mode default chamfer scheme question from Mr.
    John Wayman, which read as follows:

    Can I change which scheme it chooses to use as the default scheme? The
    default is DxD, which I don't recall ever using in my life. Each time I
    create a chamfer, therefore, I have to remember to change it to 45 x D,
    which is the one I use most .

    Any suggestions?

    Thanks,

    John Wayman





    unknown11-Visitor
    1-Visitor
    August 24, 2005
    It worked for me. All the option (default_chamfer_scheme 45xd) does is
    when you create a chamfer feature in the model, it automatically defaults
    45xD instead of DxD.

    It has nothing to do with the text display or asme/ansi standards.



    I am on WF2.0 M050.



    aldebot751-Visitor
    1-Visitor
    August 24, 2005


    That is funny because I just sent an enhancement request to PTC. The
    config option chamfer_45deg_dim_text set to asme/ansi, ( or
    default_chamfer_scheme) does not work correctly or not per ASME
    standard, per asme it should be dim X angle, so PTC has the wrong
    functionality and are not conforming to the standard that they are
    calling out.



    As far as I know everybody has to change the chamfer dimensions.



    We should all try to create an enhancement request for this option, as
    you know, the squeaky wheel gets the grease.



    Jael B. Aldebot-Brousseau

    Designer, Opto-Mechanical Engineering



    BAE SYSTEMS

    Communication, Navigation,

    Identification and Reconnaissance

    450 Pulaski Road

    Greenlawn, NY 11740

    *Tel. (631) 912-2799

    Fax (631) 912-2721

    *Email jael.brousseau @baesystems.com






    Confidentiality Notice: This message is confidential. The information
    contained in this message is intended only for the personal and
    confidential use of the recipient(s) named above. If you are not the
    intended recipient, please do not read, copy, or use it, and do not
    disclose it to others. Please notify us immediately by telephone of the
    delivery error and returning the original message to us via mail.
    jflores-31-Visitor
    1-Visitor
    August 25, 2005
    It can be argued that PTC is compliant with the standard. See the following paragraphs from ASME Y14.5M-1994.



    1.1.4 Figures. The figures in this Standard are intended only as illustrations to aid the user in understanding the principles and methods of dimensioning and tolerancing described in the text. The absence of a figure illustrating the desired application is neither reason to assume inapplicability, nor basis for drawing rejection. In some instances, figures show added detail for emphasis. In other instances, figures are incomplete by intent. Numerical values of dimensions and tolerances are illustrative only.





    1.8.15.1 Chamfers Specified by Note. A note may be used to specify 45º chamfers, as in Fig. 1-42. This method is used only with 45º chamfer, as the linear value applies in either direction





    No where in the 1.8.15.1 paragraph does the standard specifically state that the linier dimension must precede the angle dimension. It merely says that a 45º chamfer and only a 45º may have its dimensions displayed in the form of a note.



    If you look back at ANSI Y14.5M-1982 you will see the figure shows the 45º angle preceding the linear dimension. Some people take this change in the figures as being a requirement, others such as me will direct you to paragraph 1.1.4, which can also be found in the 1982 standard at 1.1.3.



    PTC is not 100% compliant with Y14.5 they never have been, nor has any other MCAD package that I know of. I think that is why they give you draft feature so you can Mickey Mouse you way past the standard in areas where they do not comply. If you really want to complain about non-compliance take a look at how they measure up to AMSE Y14.41-2003.



    .Thank You, Jim Flores

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