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Some of the entities could not be used when trying to create thread from a helix.
I am making a inset that needs three threaded posts. https://cad.onshape.com/documents/051da2a5b42e9b25268d84ea/w/a9cf92a5bf1f8f4f1a7d8cfe/e/1ab179b3fee41f6c8f66f4e2
I have the helix on the extruded faces of the posts. Created the sketch with a equilateral triangle for the sweep remove extrude. After I select the edge of the triangle and the helix, I press the pierce button.
I get the message Some of the entities could not be used. I can’t figure out why, I created a single post “test” with the same process, and it worked fine. https://cad.onshape.com/documents/6455c5cf0ebee06dbf539786/w/7f54cf4507171fdf91fa2084/e/0ed7efdd4375af
screen shots in attached file