How to simplify this parametric ISO M6 screw ?

[runsenP7XP2]

Hi guys, im new at inventor so im not fully aware of all the features in has available. It took me almost 2 days to create this ISO M6 screw after studying the specs and dimensions and attempting to make it parametric. 

I finally created an ISO M6 screw with a tapered end , but it isnt fully parametric yet as some part I had to manually tweak the values to get it working. the 3d sketch "variable helix curve tool" wasnt working as I wanted, so i had to creat 2 helix curves instead (1 constant and 1 tapered) . I always encounter the issue of self intersecting/doesnt produce meaningful result error when doing the sweep. Could anyone modify this file or share a file/solution how best to approach this design and make it parametric?  (My next step is to add tolerance by using the thickness/offset tool )

the reason for creating the tapered end is to allow it to easily screw into a nut, others would say just use a chamfer , but i would also like to 3D print this design first so i may compare its actual "easiness "

https://limewire.com/d/77YFv#sEjxzYlcT5   ( the .ipt part using Autodesk Inventor Professional 2024

[kacper.suchomski]

Hi

How is a taper on the thread supposed to make screwing easier if this part of the geometry will not have any contact with the nut?

[johnsonshiue]

Hi! I could be wrong but I think if you want the precise swept geometry in this case, you will need to use Solid Sweep. It can mimic how the screw is machined. However, depending on the path, Solid Sweep may fail.

Many thanks!