On 30 May 2013 08:42, Gregg Eshelman <g_ala...@yahoo.com> wrote: > Here's something that looks like the perfect thing for moving the grinder > head on a CNC cam grinder. > http://www.youtube.com/watch?v=9WIMscMFLAA
Clever, looks like fun to control. I guess that any of the steam engine valve-gear mechanisms would work too: http://en.wikipedia.org/wiki/Stephenson_valve_gear > A plain eccentric timed to the shaft rotation won't do for most camshafts. Indeed, but a camshaft is a lot closer to an eccentric than to a spiral (which is what a constant-speed linear axis tries to make). The idea is to use a servo-driven eccentric to produce a heavily modified version of the basic eccentric shape by dynamically varying the phasing between the servo motor driving the eccentric and the spindle holding the cam. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
