Ok, I did not know that. I would think though, that ripple and resolution are software issues which should be readily solvable for a particular motor with the complexity afforded by micros today, and only needs to be done once. The material cost savings though, accumulate.
Regards Roland On 2 May 2013 23:04, N. Christopher Perry <[email protected]>wrote: > They have a lot of torque ripple and are harder to micro step. Given > these factors their development is usually very targeted, so you won't > generally find them lying about in surplus piles. > > For things like plasma and torch cutters they are probably a very cost > effective alternative, if you can find them. > > N. Christopher Perry > > On May 2, 2013, at 14:38, Cogoman <[email protected]> wrote: > > > I believe I have seen them used to advance the roller on an electric > typewriter. When the current is off, there's no cogging like hybrid > steppers have. That makes adjust paper height by hand seem normal for a > typewriter. > > Sent from my Kyocera Rise > > > > Roland Jollivet <[email protected]> wrote: > > > >> Hi All > >> > >> Can anyone tell me if they are actually using variable reluctance > motors as > >> servos on CNC machines. > >> > >> I find it odd that such a simple motor is not in greater use. The only > >> place I've ever seen them used was to position the head on old 8in > floppy > >> drives. > >> Maybe they just don't have a good power to size ratio? > >> > >> Regards > >> Roland > >> > ------------------------------------------------------------------------------ > >> 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 > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > ------------------------------------------------------------------------------ > > Get 100% visibility into Java/.NET code with AppDynamics Lite > > It's a free troubleshooting tool designed for production > > Get down to code-level detail for bottlenecks, with <2% overhead. > > Download for free and get started troubleshooting in minutes. > > http://p.sf.net/sfu/appdyn_d2d_ap2 > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Get 100% visibility into Java/.NET code with AppDynamics Lite > It's a free troubleshooting tool designed for production > Get down to code-level detail for bottlenecks, with <2% overhead. > Download for free and get started troubleshooting in minutes. > http://p.sf.net/sfu/appdyn_d2d_ap2 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
