thank you for your quick respond, I'll will try the 2d ramp, I need the perpendicular because it's a core to mold a peanut butter cap, once again, thank you bothh of you very much for your helps. best regards Allen

Hello everyone I have an external thread to be Milled, it seems that I can not turn off the arc lead in and lead out, I would like to have perpendicular lead-in and lead-out instead, I have to start the thread start angle at 0 with perpendicular lead-in and have 1 1/4 turn and a perpendicular lead out. thanks in advanced for your helps Allen