Hi All,

I'm trying to design a functional small screw cap container:



I started with a helix and then created a triangular profile which I intend to rail revolve using the helix as the rail. Problem is when I do that, the rail revolve just makes one circle and does not follow the helix:



Could someone let me know what I'm doing wrong?

Also, I'll need to create the screw cap which I assume will be by using the boolean difference command. What would be the approximate tolerance I should use for a functional screw cap?

Many thanks in advance!
Gunter