On 11 June 2013 12:07, Gregg Eshelman <g_ala...@yahoo.com> wrote: > Check out their video page. There's a demo of it doing automatic change using > a holder rack with ramps to push the spring loaded collar up.
Yes, I saw that. It relies on axis force to actuate the mechanism. I can imagine that in some cases that might be fine, and in others not. The combination of separating wedges, springs and balls moving into grooves introduces a number of nonlinear mechanisms, it may be that the clamping force is very high. There are quite a lot of moving parts exposed to dust/coolant/swarf in that system. It looks like something I would be happy to buy for personal use, but less happy to install for a customer. (I am also wondering if a version of kwik-switch (which has the advantage of being bottom-actuated) could be made where contra-rotating geared nuts are pushed between two sections of rack (at different heights) to operate a much shorter variant of the ball+hole+ramp mechanism to lock collets directly into the ER20 cavity.) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
