On 4 June 2015 at 03:19, andy pugh <bodge...@gmail.com> wrote: > Until about 5 years ago I knew of 2 types of chuck. 4-jaw independent > and 3-jaw self-centering.
Supplementary question: How do three-jaw chucks work anyway? When you thing about it, the scroll has to be free to rotate. If you give it a lot of radial clearance and then visualise the setup, the jaws, scroll and work can all wobble as a unit by that clearance (the motion of the jaws in the tracks is interesting, and I think it actually needs the clamped radius to reduce to happen. Is that the secret? I don't see the same effect in the 4-jaw scroll chick where everything gets the option to wobble by the scroll clearance. It stands to reason that chuck-makers understand chucks more than me, so what am I missing? What second-order effect makes a 4-jaw scroll chuck work? (I think, that even a three-jaw needs a second-order effect) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
