5 Replies Latest reply on Jan 6, 2015 4:37 PM by Jamil Snead

    Showing fastener edges in a drawing

    Thomas Walder

      Hello All,

       

      I'm sure this question has been asked somewhere before but after much google searching I could not find a topic about it.

       

      When making assembly drawings the interference in cosmetic threads causes the edges to not show up.  The best answer I could find was to make the models so there is no interference.  I know I can do that by selecting the "remove thread" option when using the hole wizard but then the part details don't have the dashed lines representing the thread.   I also don't want to use configurations to have a model with "remove thread" for assemblies and "cosmetic thread" for part details.  I'm not even sure that's configurable anyway, I've never looked into it. The only other thing I could think of was to model bolts using the minor diameter which I'd rather not do.  Up until now I have just been manually drawing in the lines so the drawing looks decent.

       

      Do you guys have any suggestions?  What do you do when you come across stuff like this?  This issue doesn't come up frequently since I usually will not call out or show fasteners in assemblies.  However, there are some instances where I will need to call out a specific fastener and if I need to use a section/broken out view then I have this problem.  Also, not sure if this makes a difference but I have made my own library of fasteners so I do not use any toolbox components.

       

      Thanks,

      Thomas

        • Re: Showing fastener edges in a drawing
          Jamil Snead

          I have come across this issue, but to me it is only a problem when the view is such that the edge would be visible, which normally isn't the case for screws in threaded holes. For me I notice it if I have a dowel pin or shaft that is press fit into a hole, so that the hole size is smaller than the pin diameter (same type of situation as you described with your screws), and then if I have an isometric view the edge of the hole doesn't show up because it is inside of the pin. In those cases I usually draw the edge in manually (or more specifically I select the real edge and convert entities, then trim it).

           

          In the case you describe where you are doing a section or broken out section I thought the overlapping lines show up, so that shouldn't be an issue. In the image below you can see what i am talking about.

          overlap.PNG

           

          Can you include a screenshot example of one of your situations?

            • Re: Showing fastener edges in a drawing
              Thomas Walder

              Jamil,

               

              I made a test model using the same screw model that is in the actual model.  To my surprise it worked exactly as I expected.  I have my screw model with the IsFastener property set to 1.  I then go into the section scope and select "exclude fasteners" and in both the section and broken out view it displays correctly.  I then tried to repeat the same process in the assembly I was working on and it does not behave the same way.  I'm not sure why this would change.  All the holes are made with hole wizard using "cosmetic thread" as the option.  I can't show the entire assembly but the other bolts behave the same way.

               

              Assem1.JPG

              sectioned.JPG

              Not sectioned.JPG

                • Re: Showing fastener edges in a drawing
                  Jamil Snead

                  I see, so the problem arises when you exlude the screw from the section. That is very strange that it works sometimes and not other times. In my test it worked as expected just like in your test.

                   

                  Actually I just tried something that might be the cause. If the section line perfectly slices through the center of the screw, then the section view displays correctly. But if the section line is slightly off from the screw axis, on the side of the view, then the edges will be missing. If the section line is off in the other direction then the edges show up fine. I don't know why SW would behave that way, but it apparently does. So maybe you just need to make sure your section lines go through the screw axes.

                  overlap1.PNG

                  overlap2.PNG

                  overlap3.PNG