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  1. cr7

    Is there a modifier to make an ISO Datum be defined like an ASME Datum?

    I think there is in the ongoing 5459 draft, adding [G] . We have to wait until release.
  2. cr7

    Datum line that is not a straight axis

    Someone with enough knowledge and access to the latest GOM Inspect (now called Zeiss Inspect), should try to create this kind of datum and report back, I think it should work.
  3. cr7

    permissible angular deviation

  4. cr7

    Aligning a dimension to a datum axis?

    Check and double-check evaluation with CMM. Maybe it isn't so easy to implement the correct evaluation of tangential plane on a cylinder. Because one of the 4 corners will be evaluated and will almost always throw out the worst corner, which extends over the edge of the actual surface, so the...
  5. cr7

    Hello, Is there any scenario whe

    Hi, I'm unsure about this in ASME, but in ISO it could be used for parallelism of the opposite side. Sorry, I don't have anything to share at the moment, except if you check the link -> Link and try to imagine the parallelism (to bottom datum) instead of straighness shown. A word of caution...
  6. cr7

    Positional Tolerances

    At RFS? As 3DDave already asked, how much are features apart?
  7. cr7

    PCB with multiple identical instances - ISO drawing-

    ISO 5458:2018 paragraph 5.4.5 (Rule E: indication of multi-level single indicator pattern specification) has something to offer here. Not sure how to apply to your requirement.
  8. cr7

    Parallel, Position or Envelope?

    If local size isn't important, you could add Tangential modifier. BUT, if this is disk shaped, then check what CMM software is doing first. It can be problematic if evaluates one of the corners blindly:
  9. cr7

    Perpendicularity of an axis

    Just want to remind you, add the symbol to make that tolerance zone diametral.
  10. cr7

    Help! Can't find English term for GD&T concept.

    I not 100% sure, but I would say it's Tolerance Stack-up/Geometric Tolerance Analysis.
  11. cr7

    OZ offest tolerance ZOne. ISO GPS

    I found out something on youtube in German -> BeSt Toleranzmanagement
  12. cr7

    Does ISO have composite profile?

    Henzold is using this style a lot. In ISO it's equivalent to single segment as this differs from composite in ASME. It may be confusing, but it's not forbidden either way in ISO.
  13. cr7

    Design Standard, Codes & Specification

    What chez311 said is true, except, that if you are giving your own money, consider checking European Union sponsored stuff, for example Estonian Centre for Standardisation -> Link
  14. cr7

    True Position for hole pattern with just one datum

    Hi, the axis of datum A would be so short, that it is for sure sane to "fix it" via datum B. In other words, do |B|A| Datum Reference Frame. For something else to comment, provide whether your drawing is following ISO or ASME world. Speaking of which, you might also want to adjust dots and...
  15. cr7

    GD&T (ASME Y14.5/ISO) non cylindrical tolerance zone

    Hi zsa! First of all, try to post your question on this subforum -> Link, otherwise it might not get atention of GD&T experts. I'm not an expert, but I can assure you that rectangular hole and slot shouldn't be define like that, because it is ambigous. Just curious, what kind of GD&T system...
  16. cr7

    Manufacturing to CAD -without Drawings Yes/No

    I can open attached file in Adobe Acrobat Reader DC, so I'm not sure what you mean? Referencehttps://files.engineering.com/getfile.aspx?folder=14a66e69-9fe4-450f-b8ee-72f62cdcedf1&file=MBD.pdf
  17. cr7

    GD&T online courses BS:8888 & ISO

    Martin, I can recall NPL, I'm not sure how many days.
  18. cr7

    Compound datums for hole intentionally not perpendicular to surface into which it is drilled

    Stephen, first of all, is datum A some sharp edge? Those "A-B"s and "A-C"s, yeah what Dave said. I know you don't like quality department, but please take your time and think/re-think how will one measure this? I see it, on the right side, this could easily be [⌖][⌀]2[Ⓜ]AC...
  19. cr7

    TP square pin

    You meant collection plane parallel to A, right?
  20. cr7

    Dual Flatness callouts on ISO GPS

    SeasonLee, I only have 1 source in front of me that I can refer to and that's Robert Roithmeier, 2016, Inspection-oriented Tolerancing - Size, Form and Location, page 109 Probably not very helpful, I know, I hope someone can refer to actual paragraphs in GPS.

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