partial sphere's on rotated surface

James,

Like Kevin, I don't have time to go into the details right now, but some clever person in another thread used patterns on curves in two directions that might work out well for what I am guessing you are trying to do.

James,

There is only one way that I know how to do this and that is using the deform feature after area pattern. See attached.  (unsuppress the pattern feature - I suppressed it for file size upload.)

Regards

Mark

I'm not 100% sure on what you're trying to acheive here - you mention a ruled surface but there is no ruled surface in your part.

If you are trying to pattern across a revolved feature, use a Circular Pattern with the Axis at the center of the revolved face to pattern in one direction. Then pattern the first Circular Pattern with another Circular Pattern using an Axis normal to the first Axis. This is simpler to do in solid because you can pattern a feature as opposed to individual bodies. Delete Face turns it into a surface.

If the surface was not revolved you could insert Face Curves onto the surface (Tools > Sketch Tools > Face Curves), then use those 3D Sketches for a Curve Driven body pattern. Alternatively start another 3D Sketch, place points on the intersections of the Face Curve 3D Sketches and then use a Sketch Pattern to pattern the bodies.

P.S. There is no need to Zip a Rar file - in the case of your files the zip is actually bigger than the rar it contains.