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  1. AXNRXN

    Help with Positional Toleranceing for Symmetry

    Tim, Fo rthe non-opposed elements, I think you are referring to the vertical edge of the bent ears? Say, I get that the Position Tolerance on the 50mm dimension covers the flat portion with the holes/ slots in it. But, as that edge bends and travels up the ear, the Position might not apply. The...
  2. AXNRXN

    Help with Positional Toleranceing for Symmetry

    I agree with you guys. I like a Profile on that feature. The Position tolerance kinda makes it confusing to me, but it is a simple way to tolerance the drawing. I wanted to pose the question as it helped me understand how a Position tolerance would work in the centered & offset cases. This...
  3. AXNRXN

    Help with Positional Toleranceing for Symmetry

    Here is what I'm talking about with the offset pin and slot. I think this is how you would have to do it if you were to use a Position tolerance with the Datum C no longer in the center of that 50mm face...
  4. AXNRXN

    Help with Positional Toleranceing for Symmetry

    Hi Chez, I'm still a bit confused on how Position would be used for tolerancing that edge. Say, if i used position across that 50mm face, it just so happens that the center plane would align with Datum C (within a specified Positional tolerance)? It would work just like the 114mm dimension on...
  5. AXNRXN

    Help with Positional Toleranceing for Symmetry

    Thanks, pylfrm. I guess you are right. I could control that flat edge of the part better. I suppose that the edge could rotate around that hole to the angular tolerance shown in the block, as long as the 25mm tolerance holds. I believe that particular edge would be an implied 90-degress to the...
  6. AXNRXN

    Help with Positional Toleranceing for Symmetry

    Chez / ewh, Yes, correct. I need a basic dimension coming from the plane formed by Datums B & C out to the 9mm hole. The 25mm and 50mm untoleranced dimensions will get a simple tolerance. The original print didn't have anything specific going on with those two dimensions, so I think I can keep...
  7. AXNRXN

    Help with Positional Toleranceing for Symmetry

    Yeah, I tried linking the PDF twice, no dice. We'll try again....https://files.engineering.com/getfile.aspx?folder=1c7f8eed-7f2d-4b63-8e41-5d0659719252&file=temp_part_1b.PDF
  8. AXNRXN

    Help with Positional Toleranceing for Symmetry

    Thanks chez311. Yes, what you wrote in your last post is how I understand it. I will also set up the datum references as you suggest. It makes sense to me calling it out that way. I've uploaded another PDF with what I believe you guys agree is the correct method. Let me know if you think I'm...
  9. AXNRXN

    Help with Positional Toleranceing for Symmetry

    @ pylfrm & Chez: Pylfrm: Okay, that sounds like it would work. Please let me know if I'm understanding this correctly: Just like on the slot, a Position tolerance on two opposing planes always defines a tolerance zone at the midplane of that dimension. So, in my example, I have a tolerance...
  10. AXNRXN

    Help with Positional Toleranceing for Symmetry

    @ dgallup, Do you mean add a Basic dimension from B to the 9mm hole? How does that form a center plane for locating the 114mm space between the ears? Say, the client's original print had a Basic 35mm dim from B to the 9mm hole, plus another 35mm Basic from that hole to the center of the slot...
  11. AXNRXN

    Help with Positional Toleranceing for Symmetry

    Hey All, I have a formed sheet metal part similar to that shown. Dataum A is the flat back surface, Datum B is defined by a hole perpendicular to A. Datum C is defined as the center plane of a slot. I want the ears of the sheet metal part to by symmetric to a center plane running through the...
  12. AXNRXN

    Draft for Lost Wax Investment Casting?

    Hey All. Not sure what category this should go in, so I'd start here. I'm working on an investment cast stainless marine product. I'm not that familiar with investment casting. It seems to me that no draft is required on the investment cast itself due to the ceramic mold being broken or...
  13. AXNRXN

    Where to find detailed fastener head, recess & drive geometry? (Beyond ASME)

    @Screwman So, as an engineer involved in cold-heading, did you come across any industry resources on it? Any recommendations? I'm working on the front-end for a manufacturer that already makes hardware of different varieties. So, when it gets into production, they will be taking over the...
  14. AXNRXN

    Where to find detailed fastener head, recess & drive geometry? (Beyond ASME)

    Hi All, I have a project where I am designing a new fastener head. It's something similar to a Philips head or Pozidrive type head. I've looked at the ASME standard for fastener heads, but they only give a few dimensions on the head and drive recess geometry. For instance, I've found additional...
  15. AXNRXN

    Dragging Control Polygon for sketched spline?

    Thanks, I called my Pro/E vendor about the issue and it I guess it is a known bug that started in WF5. WF4 has the functionality as does the latest release of WF5, but its missing in earlier WF5 releases and Creo. Here's the email from support: "It looks like PTC knows about the issue we went...
  16. AXNRXN

    Dragging Control Polygon for sketched spline?

    Hi All, I posted this question months ago and I guess I either forgot the answer or moved on to other things and never figured it out. I'm trying to figure out how to drag the control polygon for a simple two point spline that is constrained by tangency at both end. I do this all the time in...
  17. AXNRXN

    Certifying non-standard materials?

    It's a rectangular frame wrapped in graphics to make a sign. Pretty Simple. No dynamic loads and hardly any additional weight. Testing is a possibility. I could have them load the unit to a suitable FOS and record the results. I'm not too worried about it actually being strong enough...
  18. AXNRXN

    Certifying non-standard materials?

    Hi All, I'm working on a quote for a client of mine that wants an engineering certification for a lightweight hanging frame. This frame is constructed out of EMT: the electrical conduit that you run wires through. There is no standard for EMT material properties as its typically not used...
  19. AXNRXN

    Sketcher Spline Modification?

    Hey All, I don't know whats up, but its driving me nuts. When I create a spline curve tangent to construction lines at both ends, I can't seem to modify the spline curvature. It has always been the case that you just right click on the spline, hit modify, then click the tab with the spline...
  20. AXNRXN

    Machinable Brass for Spring?

    Hi All, I'm designing an electrical connector housing that is to be machined from brass. I need to design in a ramping bayonette-style twist lock into this housing...like what you would find on a typical BNC cable connector. This particular design requires that a piece of the brass flex like a...

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