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How to create threads


magnuslar

Hi!

I'm at loss in trying to create threads. I need to produce an adaptor from female 1,25" thread to female 42mm thread. I watch the video here: 

https://www.youtube.com/watch?v=p9gYEdyLFIA

Looks easy enought. I can create a cylinder but I can not sketch the profile of the thread. I don't understand what sketch position they are in in the video - with the large green rectangle. I can not get to a sketch mode with my cylinder seen from the side - I don't get the squared pattern over it all, and when I try to sketch, I get all kinds of strange things. 

Anyone can guide me on how I make this first crucial step, the sketching of the thread pattern....?

Magnus Larsson