3d Curve growing

[[Cl...]]

I have a family of 11 parts. The geometry is exactly the same. The only difference is the OD threaded
major Ø tip goes from 3.0mm thru 10.35mm. Using PCM, How do I get the curve to follow the size
change? It's a cylindrical spiral curve extracted from the threaded tip.

[[Mi...]]

You could use the point generator in the curve.

Start Index: 0
End Index: 360*A A = number of coil, 360°
Step: 1,0 Step width 1,0

point: point(cos(index)*R,sin(index)*R,(S/360)*(index),-cos(index),-sin(index),0)

R = Radius, S = pitch

Give it a try, i´ve never used it since 8 years ago.
Goog luck 🙂

[[Is...]]

There are some performance issues with the point generator, generate text files gives faster execution and also more parametrization options:

viewtopic.php?p=22560#p22560

viewtopic.php?p=13419#p13419

viewtopic.php?p=21408#p21408

viewtopic.php?p=12892#p12892

[[Is...]]

This has more potential for 3d:

viewtopic.php?p=29138#p29138

[[Cl...]]

Thanks to everyone for the input. I just found out that the feature (threads)
extract as a cylinder. So I can just create a para file of diameters for each size.