2 Replies Latest reply on Dec 12, 2018 11:57 AM by Brad Walker

    Dimension Reference Planes

    Brad Walker

      Howdy,

       

      I'm trying to make my life easier dealing with large assemblies by creating more smaller subassemblies instead of trying to assemble dozens of parts in my assembly file. In my mind, this is an attempt to do more "top-down" style modeling instead of bottom up (though my understanding of top down is very limited). The picture below is of suspension brackets that will be mated to the bottom side of a trailer to mount leaf springs. I'm trying to place the front, middle, and rear brackets all 32" apart (length-wise down the trailer). I thought I could just dimension planes 8, 9, and 10 at 32" and be done. But I can't get it to work. Any suggestions?

       

      TIA

      BW

       

        • Re: Dimension Reference Planes
          Glenn Schroeder

          Creating sub-assemblies inside the main assembly is generally good practice, and I do it often, but it's not really top-down.  Now that I have that out of the way, I don't believe you need all those planes.  Your brackets appear to be symmetric, so if I had modeled them I'd have had one of the three main planes going right down the center (see below).  Then it would be as simple as creating distance mates using those Part planes.

           

           

          If your Parts don't have a plane going down the center you can create a new plane in the Part files, using opposing faces to drive the Plane, and use those planes for the Assembly mates.

           

           

          Or depending on how the files were modeled it may be simple to edit the feature to put the plane in the center, possibly by editing the feature and choosing "Midplane" instead of "Blind" for the end condition.