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. 2013/5/29 andy pugh <bodge...@gmail.com> > On 29 May 2013 13:00, Les Newell <les.new...@fastmail.co.uk> wrote: > > Yup, that is pretty similar to what I did only in my case the parts were > > tapered and hexagonal. > > I have a HAL component that allows me to say how many facets I want on > my polygons. It is actually in the system all the time, but is rather > rarely used. Partly because my lathe can't really turn slowly enough > for the X-axis to track properly. > > It's handy for turning parts like this: > > https://picasaweb.google.com/lh/photo/d4I-fmDmnUsK1nalPhVJhtMTjNZETYmyPJy0liipFm0?feat=directlink > > -- > 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 > -- *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
