> I'm sure that Pilz, Faulhaber, Schaffner and a bunch of other outfits > have a device that will do what you want, in some manner. I don't think > I have ever seen exactly a red mushroom switch that would mechanically > activate, but these companies and others have safety-rated relays (for > about $400) and safety-duty PLCs (about a grand and WAY up) for these > sorts of requirements. They are all designed with extensive > fault-tolerant, fail-safe electronic and mechanical components.
Yeah, I've seen some of these devices. You wouldn't think e-stop could get so complicated. > The problem with making it mechanical > through the red button is that someone intentionally or accidentally > jamming the button could prevent the E-stop action from happening. I wasn't thinking that the computer would use this as a way to stop the machine. Rather, the computer would stop the machine however it already does, but in addition it would press the e-stop, forcing the operator to twist/lift the button before resuming, even if he never pressed the button. Neil ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
