## 3D Equation Curve

## 3D Equation Curve

(OP)

Hello, (Inventor 2013 suite) I am trying to create a variable pitch worm screw,so went about trying the 3D Equation Curve with a view to sweep a cut down the length of a shaft, the 3D curve looks ok, pretty much what i wanted, but when i created a sketch to sweep/cut the end result went haywire, nothing like what i wanted.

Is 3D Equation Curve the right way to achive a variable pitch screw?

Thanks in advance

Is 3D Equation Curve the right way to achive a variable pitch screw?

Thanks in advance

## RE: 3D Equation Curve

Did you try specifying the cut profile sketch to stay perpendicular to the shaft axis?

I don't know much about the 3D equation curve tool...I would have tried to make the part with a sequence of linked helices (helix-es?).

## RE: 3D Equation Curve

## RE: 3D Equation Curve

http://forums.autodesk.com/t5/Autodesk-Inventor/Va...

## RE: 3D Equation Curve

Attach the file here.

## RE: 3D Equation Curve

Its the best I can do at the moment!

Thanks anyway for the input

## RE: 3D Equation Curve