About 120 RPM for the first tenths of milimeter, and then 50 rpm for the last turns to finish it. This machine has no VFD, it uses a two speed electric motor and I use it as it was originally. I can make it go faster, but approximately that's the velocity I use to make them based on the diameters I use.
2013/5/29 Les Newell <les.new...@fastmail.co.uk> > How fast do you turn the cam while grinding? > > Les > > On 29/05/2013 13:23, Leonardo Marsaglia wrote: > > I do make camshafts for living, and I'm controlling a cam grinder with > > LinuxCNC but only for positioning, since the grinder uses a master to > make > > the lobes. I'm always thinking about using cnc to make the profiles and > > don't use the masters anymore. Because the lack of time, I couldn't even > > start with the tests for this but it's a feature I would really like to > > implement!. > > > > The first thing anyway will be the roughing of the cams using a mill, I > > have two old hydraulic copy lathes that are going to be used for this. If > > that works, it's the first step. I'm delaying this because I'm making > > several other projects now. > > > > Anyway I did read Andy's program and given my poor knowledge I didn't > > understand too much, anyway it's a matter of learning, but I think that > for > > the roughing process with a mill there is no need to use acceleration > PID, > > I think that using only position PID it would be ok. > > > > For the griding process it's another deal since there is no room for the > > error and the axis of the grinding wheel has to follow exactly the rotary > > axis, and obviously have the radius compensation. I think that's the > > trickiest part in case of doing it using acceleration instead of > position. > > > > A really interesting proyect indeed. > > > > > > ------------------------------------------------------------------------------ > 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 > -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ 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
