3 Replies Latest reply on Oct 13, 2016 8:15 AM by M. B.

    Timing a screw thread

    Bill Hopcraft
    Bill Hopcraft Oct 12, 2016 8:33 PM

      I have an assembly model with some threaded parts.  How can the parts be mated so that the threads appear to be properly engaged when viewed in cross-section?

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        • Re: Timing a screw thread
          Shaodun Lin
          Shaodun Lin Employee Oct 12, 2016 11:55 PM (in response to Bill Hopcraft)

          I have no good idea but previously my method is using angle mate to define the relative rotation angle of the screw and the hole and adjust the angle mate manually until no overlapping.

          • Re: Timing a screw thread
            John Stoltzfus
            John Stoltzfus Oct 13, 2016 6:22 AM (in response to Bill Hopcraft)

            If you create your own thread always start the helix at the same spot, 0, 90, 180, 270 degrees that way when you mate them you'll be right on..

            • Re: Timing a screw thread
              M. B.
              M. B. Oct 13, 2016 8:15 AM (in response to Bill Hopcraft)

              I have a dimensions named ThreadStart@xxxxx in both the internal thread and external thread sketches.  This dimension allows the center of the thread to float either direction parallel to the thread axis.  In one part make this dimension value P x 1, P x 2, P x 3, etc.  In the other part make this dimension P x .5, P x 1.5, P x 2.5, etc.  Then create an axial mate that corresponds to origin of the ThreadStart dimensions and a mate where both sketches are coincident.