9 Replies Latest reply on Jun 10, 2009 12:43 PM by aditya nugroho

    180 Degree Dimension

    Jason Capriotti
      We have a piece of sheetmetal that is round 180 degrees. We are trying to document that on the drawing but creating a 180 degree dimension seem near impossible without trying to cheat and make the part 179.999 degrees.

      Is this a common problem in CAD programs? Is there another way this should documented?
        • 180 Degree Dimension
          Charles Culp
          Import>Model Items?

          How about model it once at 170°, then measure in the drawing, then change the model to 180°? (yeah, I don't really like that one either).
          • 180 Degree Dimension
            Garrett Brooks
            draw some sketch lines over the part in the drawing a little less than 180 with one line under defined put a dimension on the sketches and set it to 180, or set the dimension to Driven and drag the under defined sketch line to the geometry.
            the dimension arrows arch will probably hard to control
              • 180 Degree Dimension
                Matthew Lorono

                Garrett Brooks wrote:

                 

                draw some sketch lines over the part in the drawing a little less than 180 with one line under defined put a dimension on the sketches and set it to 180, or set the dimension to Driven and drag the under defined sketch line to the geometry.

                the dimension arrows arch will probably hard to control

                This does seem like a lot of work for something that shouldn't be a limitation in the first place.
                  • 180 Degree Dimension
                    Garrett Brooks

                    Matthew Lorono wrote:

                     

                    Garrett Brooks wrote:

                     

                    draw some sketch lines over the part in the drawing a little less than 180 with one line under defined put a dimension on the sketches and set it to 180, or set the dimension to Driven and drag the under defined sketch line to the geometry.
                    the dimension arrows arch will probably hard to control

                    This does seem like a lot of work for something that shouldn't be a limitation in the first place.

                    I agree, but I was just trying to think of another solution

                    Maybe SolidWorks needs
                    Rightclick>More Dimensions>Angle

                • 180 Degree Dimension
                  Kelvin Lamport
                  How would the manufacturer check that 180° had been achieved? How would the part be inspected for 180°? How do you measure 180°?

                  Practical and useable dimensions (Chord length, chord height and radius) should be used.
                  • 180 Degree Dimension
                    Dale Dunn
                    Sketch a line at 90° with a basic dimension or 90° to the datum. Then dimension from that perpendicular line. That's the only way I can think of to make the dimension with a stable dimension line that won't flip to the wrong side at some point in the future.
                    • 180 Degree Dimension
                      Kelvin Lamport
                      If configs exist, just create a view of a non-180° config first, use the Insert > Model Items to place the dimension (assuming it was used in the model sketch) then change the view to reference the 180° config.