That mechanism is interesting, thought non-linear. You'd need to maximize the connecting rod lengths and then probably do some linearization in software to get the output to deliver uniform incremental displacement.
N. Christopher Perry On May 30, 2013, at 3:42, 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 > > Instead of connecting the two eccentrics to one motor and manually adjusting > it, use two servo motors which would be independently controlled to > continuously vary the stroke. Looks like the reaction time could be very > fast, especially if both differential motor speed and reversing are used. > > A plain eccentric timed to the shaft rotation won't do for most camshafts. > > Flat tappet cams are usually egg shaped, with a rather pointy small end and a > very small side to side taper around the base circle so the tappet and other > valvetrain components will rotate. (The Chevy 350 smallblock V8 is a bit > notorious for tappets failing to rotate then quickly chewing up themselves > and the camshaft.) Roller tappet cams are usually "racetrack" shaped with a > round end, nearly flat sides and no taper. > > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
