I'm trying to model the threads of a polar springs 500ml bottle in Blender 2.8x so I can 3D print an adapter for it.
I'm having issues converting what Blender 2.8x calls Screw and what the diagram calls Helix Angle and Travel Per Turn.
Full diagram of threads I'm following
I've been able to find some good dimensions for the threads to start with. Link to full diagram below. https://www.bevtech.org/assets/Threadspecs/2072573_tmp.pdf
I was thinking of using the profile of a 3 edge plane See image below
And using the screw modifier to make each of the 3 threads (each of the 3 threads only go around 73-75% of the bottle head) see image below (I was doing it this way to have more control over each thread since 3D printing this may require fine tuning each thread)
To test the treads I would just use a cap that comes with the 500ml Poland springs water bottle.
Ps: I was following parts of this tutorial https://youtu.be/kVNxfCtoG_A