Tutorial: how to model a spiral in Solid Edge
The spiral is modeled with a sweep command.
First you must draw the spiral path on a sketch. Be careful that the different arcs are connected and have a tangent constraints one to the other.
Then draw the spiral cross section in a sketch normal to the spiral path (use the appropriated option when you position the sketch plane).
Use the sweep command with the single path option.
Then select the path first and the cross section next.