2 Replies Latest reply on Jul 18, 2013 12:37 PM by Glenn Schroeder

    Correct usage for construction lines / guide lines.

    Matt Richardson

      I design and manufacture outdoor shelters and various other play equipment, so use timber posts all the time. It's normal to dimension them centre to centre, so you can set them out.

       

      I've been using the 'point' in Sketch, when creating the drawings, but i'm getting overdefined pop-ups. I also use construction lines to act as the ground level, but when I dimension of the centreline to the posts, it comes up with over defined pop ups again.

       

      I know that I'm putting fully defined sketch components into a drawing and then dimensioning them, which is the cause of the fully defined pop-ups; but I'm keen to find out what the best practice is when creating setting out drawings. I don't want the points and centrelines to be fixed to the model views. I just need them to dimension off.

       

      Appreciate the help.

       

      Matt

        • Re: Correct usage for construction lines / guide lines.
          John Burrill

          Hi Matt, you're getting overdefined messages because you are creating dimensions to sketch geometry in your drawing and that sketch geometry is already constrained to geometry in your model.  It's not a big problem, just change the dimensions from Driving to Driven or have SolidWorks automatically make overdefining dimensions driven.  You do that in Options: System Options:

          set_driven_by_default.PNG

          You can also create center-line annotations (Annotations toolbar).

          centerline annotations.PNG

          You can dimension to these annotations and they're very easy to create (pick the symmetrical edges and it adds the line to the center).  Unfortunately, if a centerline loses its reference, it cann't be repaired.

          Take a look at those and post back your status.

          • Re: Correct usage for construction lines / guide lines.
            Glenn Schroeder

            Matt,

             

            I'll bet that John's top screenshot will fix your problems.  I wanted to mention that in my case that box occasionally un-checks itself for no apparent reason, so if the behavior you're describing reoccurs you might want to go back and check it.