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  1. greenimi

    AVG and F symbol - fig 8-14/2018

    Figure 8-14 Specifying Restraint for Nonrigid Parts Is F modifier in the circularity needed in figure 8-14? I am asking this because in fig 8-13/2018 F symbol has been removed (relative to the equivalent figure 5-13 from 2009) Why F was kept in 8-14?
  2. greenimi

    Localized area(s) that do not contain opposed points

    2018 states on 5.8.1. (e) : Where a portion of a regular feature of size has a localized area(s) that do not contain opposed points, the actual value of an individual distance at any cross section between the unrelated AME to a point on the surface may not violate the LMC limit. See Figure 5-9...
  3. greenimi

    Maximum possible contact and a single solution

    Per ASME Y14.5-2018 7.12.4 Pattern of Features of Size RMB When RMB is applicable in a feature control frame to common datum features of size used to establish a single datum, the true geometric counterpart of each feature shall be fixed in location relative to one another. The true geometric...
  4. greenimi

    How cylindicity works?

    Per 8.4.4 (ASME y14.5-2018): Cylindricity may be applied on a unit basis as a means of limiting an abrupt surface variation within a relatively short length of the feature. Does anyone knows how this callout supposed to work? Is the tolerance zone conical or cylindrical? I cannot find any...
  5. greenimi

    Fig 7-39/2018 question

    In fig 7-39/ ASME Y14.5-2018 I think we all agree that the two bores should be “squiggly” (in the same way the outside diameter is shown a little “bumpy”), but my question is: Do you think the correct way is to show the two (“squiggly” to be) holes slightly rotated clockwise? (my red...
  6. greenimi

    Runout Tolerance Applied on an Assembly

    Why runout is used in this figure? (instead of profile) What would be the difference between using profile (maybe even with dynamic profile modifier) instead of currently shown total runout? Are there any mathematical difference between shown total runout and profile (again with dynamic profile...
  7. greenimi

    VDA5 versus AIAG regarding the 5% resolution

    I would like to know what is the AIAG (Automotive Industry Action Group) equivalent of 5% resolution requirement from VDA5 (Quality Management inthe Automotive Industry) Basically, I am asking the following: VDA 5 has the requirement shown in the picture below (5% of the resolution). What is...
  8. greenimi

    UF and collection planes in ISO GPS

    ISO GPS system: Can UF and collection plane be applied together? (UF above the tolerance indicator and collection plane as a supplemental indicator) I don't have access to all ISO GPS standards, but in the ones I have I cannot find an applicable example where UF and Collection plane are used...
  9. greenimi

    Self-referencing or not

    Fig 9-7 / ASME Y14.5-2009 If total runout defining datum feature D is replaced by position callout would you consider that the newly created position to be self-referencing (and hence not valid)? Reasoning: I am thinking that position is checking the UAME and since D is secondary in the FCF...
  10. greenimi

    Datum targets and their form and orientation errors controlled

    ASME Y14.5-2009 Question #1: I have an internal checker who is claiming that would be wrong (illegal) to add flatness on the surface where datum targets area A (Ø6) are shown. By the same token, Question #2: adding a perpendicularity callout (to A primary) for the surface where datum...
  11. greenimi

    Dimension and tolerances on an ISO view (2D drawing)

    (I asked this question in a different thread - with no answer- and I am going to ask it on a separate discussion too) Do you think it is ALLOWED (per rules, regulations and stipulations) by the ASME standard to dimension a feature in an ISO view? Scenario: A 2D drawing is chosen as a method...
  12. greenimi

    Burunduk and 3DDave math problem

    3DDave and Burunduk, Probably you won't agree with each other on what is the "correct" result of 8:2(2+2) I am not taking sides just curious of your answers, if you will. Is it 1? Is it 16? Probably that's why PEMDAS exist in the first place.
  13. greenimi

    Friday Fun or how reliable could be job descriptions and requirements

    See below (in bold) how you can rely on job descriptions..... Strong knowledge of product design and product definition Previous CIPT, IPT or Systems integration experience Exposure to manufacturing, quality, and aftermarket operations Experience with Siemens NX and Teamcenter, extensive...
  14. greenimi

    MMB / LMB sizes

    IF (again IF) datum features B and C are to be modified at MMB or LMB and Note 3 is changed to "DRAFT ADDS MATERIAL" what would be the appropriate sizes of the applicable boundaries? (sizes of datum feature simulators) (from ASME Y14.8-2009) MMB(B)=? MMB(C)=? LMB(B)=? LMB(C)=?
  15. greenimi

    Casting datum features

    I would like to know, from your perspective, which features should be assigned as DATUM FEATURES when trying to define casting drawings? Otherwise stated, what would be some good selection criteria in order to successfully define such drawings (casting drawings) Look like there are many choices...
  16. greenimi

    Irregular Feature of Size

    If datum feature A is to be defined which option would be the best: - plus-minus size and relationship to the primary / secondary --such as pos| Ø.xxx|B|C| or - basic size diameter Øxxx and profile|xxx|B|C| (B and C being primary and secondary datum features, not shown on this drawing from...
  17. greenimi

    A(M)-B(M) co-datum

    What is the best way to take advantage of datum feature shift offered by A(M)-B(M) callouts. (Software Calypso version 2014 5.8.2 service pack 5) See attachment ISO 5459:2011 for A-B concept (shown RMB per ASME Y14.5 terminology) I would like to know how A(M)-B(M) is calculated and how to use...
  18. greenimi

    CMM and perpendicularity at MMC

    My understanding of CMM measurements (done mostly in agreement with ISO) is limited, so I would like to ask some questions for clarification. Pretend you have a PERPENDICULARITY callout Ø0.05 to datum feature A. When the CMM is qualifying this cylinder’s perpendicularity how this process is...
  19. greenimi

    Stackup -comparison

    Question for the group": (Ref: ""maximum wall thickness at one spot" vs. "maximum consistent wall thickness." from a previous discussion) How the stackup -minimum and maximum wall distance- change (if it does ) , IF I would say that: X maximum = maximum possible distance that can ever...
  20. greenimi

    CMM or OGP -actual local size

    Easy question: What is the CMM"s way to report the actual local size per ASME Y14.5, for a pin for example? (.500±.010 pin measured on the CMM). As far as I know, for a pin, the outer tangential and min circumscribed algorithms should be the same, but that is only taking care of the envelope...

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