loft cut


The basic answer is that you usually need to have the same number of control points in each sketch when doing a loft. When you use a circle, this is usually not a rule you need to follow, but it is in this case. I think you could solve the problem in other ways like using guide curves, or even a center-line, but these two methods should work as well. Give them a try.

My SolidWorks models are 2016, so you won't be able to open them. The Step files should work.

  1. Step 1:

    Option one is sort of "cheating", but the goal is to convert your sketch with four points into a sketch with just a single point... How to do that? Use the Fit Spline command.
    You'll loose the sharp 90° corners on the sketch, but those are unrealistic anyway if this is an intake or exhaust manifold

  2. Step 2:

    Option 2 is usually the better option. It is adding additional segments to a sketch. In this case you'll need to divide your circle into four arcs. You could re-sketch it with tangent arcs, but that is usually a nightmare. Instead, use the Split Point tool. NOT the Point tool. The sketch really has to be divided into segments, not just have sketch points added to it.


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