Helix angle

onshaper

I'm trying to draw a helix with a 3° helix angle but I don't see an option for angle, only pitch/turns. Does anyone happen to know the math required to go from helix angle to any of the Onshape input options?

konstantin_shiriazdanov

In your case #pitch = Pi* #helixDiameter * tan(3*degree)

EvanReese

The math that @konstantin_shiriazdanov is using is right, and it pretty much just unwraps the helix and makes it into a right triangle so you can control the angle of the helix. A mathless way to do it is to start with the triangle you want to roll up, and use the wrap tool like this. Note you need to make a long skinny rectangle to wrap since you can't just wrap a line, then you can use composite curve to pick the edge you want to keep.
https://cad.onshape.com/documents/132a9b71cb07b54fa8f86197/w/ce1b6f4c2f261d60555bae7c/e/1e6ad23189378ef937580247