Weekly Challenge Group

The lofted surface is drawn on the cutout body

Easy one. The cylinder is dissected by a spiral surface.

Were you able to sweep the spiral surface in one pass? With Inventor I couldn’t even do 180 degrees much less 360 at one time. I had to break it down into 3 separate 120 degree sections. Attempts at using surfacing were met with all kinds of odd distortions.

Is there a faster way to complete it in 5 steps

It essentially took me 4 features not including a workplane and a workaxis. It seems like it should be easier

I made the surface as a loft between the black and the red lines with the blue spiral as a guide curve. I wouldn't/couldn't use a sweep.

SW can't create spiral surface directly. I made spiral curve and created spiral surface with loft surface command.

In Solidworks, you can also make spiral surface as a boundary surface between the centre point and the spiral. This is quite neat :-)

With CATIA, I made a surface similar to Steen's method, then extruded it to make a solid:

A similar shape, but with a horizontal sweep:

Can anyone help me with this. I am trying to perform this action but can not do this properly. I am trying to do this in solidworks.

I haven't found a correct solution in Fusion 360 yet either. The helix spiral part in mine has a slight curve. Best solution I have found so far is building this with sketches and patch surfaces. I am sure there is a more elegant way, but it is hiding from me

A and B are not equal distances so when I create a sweep around the outside path, it seems to make a warp in the middle to compensate.

I don't think anybody has been able to do it with a sweep. A loft seems to be the only method.

I got the surface loft to work and that did give much better results.