On Sun, 21 Nov 2021 at 07:45, John Dammeyer <jo...@autoartisans.com> wrote: > > I'd like to be able to limit the number of turns to 2.
OK, here is a possible arrangement that will fit in the existing packaging. Press a sleeve onto the outside of the socket with a spiral groove machined into it (actually two grooves, a 2-start thread) Sliding on the two uprights is a part that engages with the groove on both sides. We will call it "the slider" The slider will initially travel down with the socket on engagement. When running clockwise the grooves lift the slider up into a continuous run-out groove at the top, so that clockwise rotation is not restricted. When running anticlockwise the slider is biased down (spring? gravity?) into the spiral and descends for the full two / three turns before getting to the end of the groove. What happens then is open to development. I can see that the slider could operate a switch to turn off the air somewhere in its travel. The slider could operate a friction disc at the bottom of travel. In that embodiment the bottom would also have a continuous run-out groove (but then the spring bias needs to be a collar top and bottom) Alternatively the slider could just hit the ends of the grooves and stop. Or the spiral ramp could be friction-coupled to the socket, still with a hard-stop at the end of the ramp. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
