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  1. Diametrix

    Hex hole as a datum feature

    Correct, it's not my drawing. As for the flats of the hex, the view that I sent is somewhat misleading. Think of a set screw with a hex socket. Here is an isometric view. No angular orientation dimensions on this drawing. It seems ok though as is. Parallel sides are defined by implied...
  2. Diametrix

    Hex hole as a datum feature

    Never mind. I agree about irregular feature of size. However, irregular feature of size can still be a datum feature. The .753+000/-.002 dimension is applied to the distances between all matching parallel surfaces of the hexagon based on the HEX note, which creates a set of three center...
  3. Diametrix

    Hex hole as a datum feature

    I'm not altogether clear on how it works. With 6 sides we define three center planes, which for the real parts will not intersect at the same axis. So we would have 3 separate axes. Which one do you use as the datum axis? In addition, what happens if the hole has odd number of sides, can you...
  4. Diametrix

    Hex hole as a datum feature

    I know you can use a square hole as a datum feature - put a single dimensions with a square symbol and attach a datum symbol to it. Can you do the same for other geometries as well? With the square you define two planes of symmetry which form an axis at their intersection. With other...
  5. Diametrix

    Can you skip a projected view on a drawing?

    I didn't have an issue with the fact that the bottom view was reversed. The question was more about the layout of the views. I understand that you can unfold the "projection planes box" to look like that (again aside from the fact whether it is a good practice or not) and the bottom view will...
  6. Diametrix

    Can you skip a projected view on a drawing?

    Sorry for the confusion, this example doesn't directly relate to the original question of the view missing. It is about the bottom view being placed below the rear view. Now top view and bottom view are in reverse orientation from each other.
  7. Diametrix

    Can you skip a projected view on a drawing?

    Something else I thought of. Does it mean that the example below is an allowable practice? Again, ignore the names of the views. They are there to clarify how I see the views being formed.
  8. Diametrix

    Can you skip a projected view on a drawing?

    There is nothing wrong with that. It is called a discussion, you should try it sometime. To paraphrase your answer, the rear view is not projected based on your opinion. If you read my original question when I started this thread, I was attempting to figure out what the standard says about it...
  9. Diametrix

    Can you skip a projected view on a drawing?

    What can I say, just when I think that I know something its time to revisit the basics again. That's why I come here, so you guys can tell me how its done.[pipe]
  10. Diametrix

    Can you skip a projected view on a drawing?

    I think the standard is fine as it is. You have to play within the rules set by the standard. So if the standard leaves the room for interpretation, that room should be allowed on the drawing and we can discuss it. However the fundamentals should be clear to everybody involved with no room...
  11. Diametrix

    Can you skip a projected view on a drawing?

    That's always a sign of weakness in any position when you ask a direct question and get a response about the number of years you've been doing it the same way. Don't get me wrong, I'm not trying to diminish the importance of experience, but is there a chance we can all learn something new...
  12. Diametrix

    Can you skip a projected view on a drawing?

    Again based on what? Can you back up this statement? I provided you a direct quote from the ASME standard that all the drawings are based on, not from some "analytical geometry textbook".
  13. Diametrix

    Can you skip a projected view on a drawing?

    You missed something above in one of my posts. You are wrong in thinking that one projected view is formed from another projected view. Each view is formed from the object/model and Y14.3 standard is quite clear about it: " 5.1 Orthographic Projection: "Orthographic projection is a system of...
  14. Diametrix

    Can you skip a projected view on a drawing?

    Again, what is this statement based on? If it is not projected, then how is it formed? If it is not one of the principal orthographic views, then it is none of the other views described in the standard. Completely agree with you though on the fact that it obfuscates the drawing.
  15. Diametrix

    Can you skip a projected view on a drawing?

    And that's based on what? That's taking it a step further than the standard intended. Y14.3 says: "6 PRINCIPAL ORTHOGRAPHIC VIEWS: The terms "top,"front," "bottom," "right side," "left side," and "rear" shall themselves not be used for naming views." It doesn't say the views can't be named or...
  16. Diametrix

    Can you skip a projected view on a drawing?

    Not really. In my example it is still to the left of the front view, so you know which way the projection goes. You are just missing the adjacent side view that should be between those two. Like this:
  17. Diametrix

    Can you skip a projected view on a drawing?

    No argument from me here. I was just trying to see if there is anything in any of the standards that expressly prohibits it. All I could find so far in Y14.3 is: 7.4 Two adjacent orthographic views are normally considered the minimum requirement to describe a three-dimensional object. 7.6 Any...
  18. Diametrix

    Can you skip a projected view on a drawing?

    Like you said, there is a hack in SW to do just about anything. You can break alignment to the parent view, in this case the side view and create new alignment to the front view. Then it will move and maintain alignment with the front view.
  19. Diametrix

    Can you skip a projected view on a drawing?

    If you mean this in terms of a CAD then it depends on the software. For example, in SW I can make a projected rear view from a side view and then delete the side view and the rear view is still going to be there. According to standard though, projected views are created from the object not...
  20. Diametrix

    Can you skip a projected view on a drawing?

    Correct. The standard says: "The minimum number of views necessary to describe the part is shown" Does it mean that you can skip projected vies that are suppose to go between two other views though?

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