The reason you use NC limit switches it because if a wire breaks or falls off your limits go off and the machine goes into an estop contition. So it is actually a "major" item because any failure to get the signal back to the input results in estop whereas a failure of a NO limit circuit will never be seen by the system. Obviously on hobby machines driven by small steppers it is not as important as damage might be minimal after a crash.
JT On 11/23/2014 8:06 PM, John Alexander Stewart wrote: > It's no problem, just tie them as the plans say (+field voltage, IIRC) and > set the correct "level" so that they trigger as expected. > > I understand that the NC switches are "better" as they will open if there's > a wiring issue, but that's a minor item. > > On Sun, Nov 23, 2014 at 7:46 PM, Jeremy Jones <sp01jjo...@gmail.com> wrote: > >> I have a BP Boss knee mill. The switches are NO. How should I go about >> wiring this to the 7i76? Would it be better to get NC switches? Appreciate >> any help. >> >> ------------------------------------------------------------------------------ >> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >> from Actuate! Instantly Supercharge Your Business Reports and Dashboards >> with Interactivity, Sharing, Native Excel Exports, App Integration & more >> Get technology previously reserved for billion-dollar corporations, FREE >> >> http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > ------------------------------------------------------------------------------ > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > from Actuate! Instantly Supercharge Your Business Reports and Dashboards > with Interactivity, Sharing, Native Excel Exports, App Integration & more > Get technology previously reserved for billion-dollar corporations, FREE > http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
