7 Replies Latest reply on Nov 3, 2011 4:11 PM by Kris Carlson

    Sketch relations

    Kris Carlson

      Hi,

       

      I want to lock two sketches together so when I extrude either one the other one travels with it. I need to extrude in two dimensions and I want the two sketches to stay together in the middle while the extrusion lengths can vary in either dimension. I get an over-defined sketch when I try to do this. So specifically in the model I want to extrude the Ambient Medium but keep the Dura Cut sketch locked to the Ambient medium so I can then extrude the Dura Cut the same dimension up and down.

       

      Can anyone see how to achieve this?

       

      I'm using SW Student Edition 2010-2011 so if you modify & save can you save so I can open it.

       

      Thanks,

       

      Kris

        • Re: Sketch relations
          Alan Stoldt

          The zip doesn't contain all the assemblies/model to open it.

           

          Seeing a preview while open your file, let me ask you this: Is this somethign that you could do in one skecth, then extured profile from this sketch, or do Derived Sketches from?

           

          Just a couple of tools that you may be able to use. Good luck.

           

          Alan

          • Re: Sketch relations
            Ryan Werner

            Is this what you were wanting?  Sorry if it is not.

             

            Ryan W.

              • Re: Sketch relations
                Kris Carlson

                Indeed it is what I intended--how did you lock them together?

                 

                Alan's techniques sound like a better way to go from the get-go :-) --you fixed what I did out of my ignorance. Thanks.

                 

                Kris

                  • Re: Sketch relations
                    Ryan Werner

                    Actually, I am not sure why I did not just extrude to surface myself.  You do not need to do anything differently you just need to select that option instead of extruding blind. 

                     

                    The first time I just made an equation that made one dimension for the length of your extrude the same of the other.  Extruding to the surface is definitely a better way to go and I can't believe I didn't do it the first time.  Thanks Mark for bringing me back to my senses.

                     

                    Ryan W.

                • Re: Sketch relations
                  Mark Kaiser

                  Sounds like you need to extrude up to a surface, with the surface being stepped.  Think extrude the surface as a stair profile.  Attached an example.  If you can't open the example, let me know, and I'll post a picture.

                    • Re: Sketch relations
                      Kris Carlson

                      It opened fine--thank you. Altho that isn't what I need extruding to a surface is a good technique to know that I hadn't used. Either of Alan's are the way I should do this--simpler probably to just make and extrude one sketch--simple is good--but now that I know what a Derived Sketch is I see how to use that elsewhere.

                    • Re: Sketch relations
                      Kris Carlson

                      For my particular need combining the two sketches in one worked perfectly and Extrude knew the center ellipse was a cut so did the extrude and cut at once. I tried the derived sketch method, too, but could not get it to Convert Entities for some reason.

                       

                      This one did not need stepping--actually a host of parts have to have the same dimensions so when I alter them the mates all stay. So next on my plate is trying the global equation-driven dimensioning that Ryan's comment suggests.

                       

                      Thanks to all.

                       

                      Kris