Sadly, my memory isn't what it used to be, it seems. I know I have done this in the past, but admittedly not in awhile. I am attempting to cut a 12 pitch thread on a 1" plastic shaft, and although my notes on the subject are seemingly comprehensive and complete, do not work any more. Please help out an exasperated moldmaker. I have extruded a 1" diameter cylinder 3" long and have changed the view to show one end of the cylinder, I have sketched a circle to the edge of the diameter, then, insert/curve/helix, after changing the parameters to my needs, an isometric view shows the helicoil fine. Now I need to make a plane normal to one end of the helicoil to sketch the thread shape that I want, and this is where I stumble, and badly. insert/reference geometry/plane yields NOTHING !!!! My notes tell me to select the point of the end, then the helicoil. I am unable to select anything. Please tell me what fundamental I am missing here!!!!!! Maybe the plane parameteres are set wrong??? The plane window never appears???
David