Lofting Woes

Answers

• andrew_troup Member, Mentor Posts: 1,584 ✭✭✭✭✭

  October 2015 edited October 2015

  Your proposed plan is a good one. What is needed to make it work controllably in Onshape is to make a dedicated sketch duplicating the destination circle, but splitting it into as many arcs as there are entities in the round-ended slot which is the profile of departure. (Use the "Split" tool - refer Help)
  
  You should create that sketch with the arcs are disposed symmetrically about both a horizontal and a vertical centreline (using the symmetrical constraint between corresponding endpoints) and use an angular dimension to drive the relative lengths of short vs long arcs.
  
  This way, when you come to fine-tune the shape of the resulting surface loft, you can do so easily.
  When you pick the two profiles, pick the segments around the departure profile in careful sequence, and then pick each corresponding arc in the destination profile in the corresponding sequence.
  
  If you find this too tedious, you could resort to 'vertex matching' (See Help)

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• andrew_troup Member, Mentor Posts: 1,584 ✭✭✭✭✭

  October 2015

  Further clarification: the arcs should be produced by either "Use/Project" from the circular edge they are intended to match, or be constrained "Coincident" with that edge (which works like "Coradial" in SW)
  You will know if you have nailed it down properly because the sketch arcs will all go black instead of blue.

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