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Recent content by randy64

  1. randy64

    profile on trimmed edge

    I assume they're both retired/unemployed, 'cause they sure as heck don't have much time to get work done...
  2. randy64

    Strength/Flexibility Relative to Structural Shape

    First of all, not an engineer. I'm a designer. I have a rectangular steel bar, .75" x 3" with a length of 24". The engineer tells me when in use (as a type of strap clamp) there is bending. Question: If that rectangular bar is replaced with a similar sized bar, but with a perpendicular...
  3. randy64

    Associative Line in an Assembly

    Trying to draw a line that is associative to a component so that when I move the component, the line goes along with it. I'm working in NX 2206. Specifically, I'm trying to draw a tube 9sweep) along lines in an assembly made up of components. I draw a straight line inside and aligned with...
  4. randy64

    Should primary datum be top or bottom and projected tolerance zone

    Belanger, So you're saying that the orientation of the projected "soda straw" is based on the face? I thought it is based on the center axis of the hole, which makes the face immaterial. In my example, the pencil probe will go where it's going to go (projection) based on the axis of the hole...
  5. randy64

    Should primary datum be top or bottom and projected tolerance zone

    Burunduk, can you show me graphically how it can be good in one direction, but off in the other? It seems to me that the hole has one centerline, one orientation that will project the same in either direction. What am I missing? Thanks
  6. randy64

    Should primary datum be top or bottom and projected tolerance zone

    Since this thread is not too old and my question is related, I'm going to resurrect this. I am designing a probe holder - pencil-type probe held in a small block. The block has a hole in it for a bushing, then the pencil probe goes in the bushing. We assign a positional tolerance on the hole...
  7. randy64

    Can you use Projection on Angularity?

    Burunduk, thank you! I would argue that using projection on a surface could make sense. Consider the following: I have a block with an angled surface. A plate is attached to this block and projects out 4 inches from that block. I could use Angularity to control the angle of the block surface...
  8. randy64

    Can you use Projection on Angularity?

    We want to control the angle of a hole, but position is not that critical. I realize that if we used True Position with Projection, it would accomplish what we want, but am curious if we can use just angularity and then project it. This may also apply to situations where we have a surface that...
  9. randy64

    Best Approach for Modeling in "Rigged" Space - NX12

    Hello all, I am used to modeling all parts at absolute 0, 0, 0 and then placing the components in their position in an assembly file. At my new job, they want us to model parts that are used one time in their assembly position, or what they call "rigged". If a part is used in more than one...
  10. randy64

    Does Profile Locate?

    Well, I create drawings, so that's what they are to me. I suppose I just assume(!) when I say centerline, the listener knows that I am talking about something on the drawing that represents a center plane or axis.
  11. randy64

    Does Profile Locate?

    Hmmm, I've always thought of a centerline as something that applies to a feature that has a natural center, like a hole or cylindrical object, or a rectangular feature IF it is being used as a datum. None of those apply in this case, in regards to the sides of the slot. I appreciate everyone's...
  12. randy64

    Does Profile Locate?

    Burunduk, are you saying that a centerline implies symmetry?
  13. randy64

    Does Profile Locate?

    Chez311, your last post makes me look at it completely different. Here's what I could buy: The 2.000 basic goes to the centerline of the radii, which are both .3215 basic, as well as located with the basic vertical dimensions. So, the radii are located, and the sides of the slot are resultant...
  14. randy64

    Does Profile Locate?

    Burunduk, an arc shaped feature that has basic dimensions to its center, then a basic radius dimension to the radius is fine. That creates a chain of basic dimensions that locates the center, then gives a dimension from the center to the edge of the radius. In that scenario, there is no...
  15. randy64

    Does Profile Locate?

    Greenimi, I do not locate a hole from its edge, I locate it from its center, because that's how things are located using positional tolerancing. If you're using profile, then you use the edge or surface. That's my whole point. I believe people are conflating pos tol principles with profile...
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