Rotate family instance as per curve

[thiru2jack]

thanks…!! @jacob.small give me a good idea… below reference is used for solve this issue

Rotating family to curve

Hey guys, im having trouble rotating these families to the curve… I have already tried to follow some of the treads about the subject, but i was out of luck [image] I uploaded the scipt aswell, together with the Helix… If anyone can give me a solution and or a lesson then i would be a happy man Thx in advantage and mad love for the Dynamo brains out there Helix.rfa (2.2 MB) Helix mullions placing.dyn (475.5 KB)