Help with loft tool

tingyi_quan

I am trying to create a Lego man and I ran into issues with the arms, I am trying to use the loft tool to connect these 2 surfaces together but the system replies with error and say it will create a self-intersecting body and does not work, please point out what I am doing wrong here and what may be causing this issue and how may I solve this issue.

glen_dewsbury

Looks like you have on ellipse at the edge of the other. For a loft this looks like nonmanifold geometry.
Try moving the plane of of the vert ellipse out board of the other and generate some guides.
https://cad.onshape.com/documents/64e959b129e3204eb8d149a9/w/2a22727a73893b6410806f1b/e/56cd8b1754c18670c7f29bd4

EvanReese

Loft guides are what you need. You may not even need to move the circle out a bit. Here's a simple example with loft guide (shown orange), where the "shoulder circle" is exactly in line with the "arm cylinder" and it still works.