Hi Neil, I believe Eric is correct. After 30 years in industry (the last 20 specifically with CNC) I have never seen what you are describing. As Eric mentioned, a relay that must be activated by a reset switch would do the job. Reset switches for this purpose I have seen and included in some of the retrofits that I have done.
Have a good day, Jim ----- Original Message ----- From: "Eric Keller" <keller...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Monday, April 12, 2010 2:01 PM Subject: Re: [Emc-users] Emergency Stop switch My guess is that a switch with an actuator in it would be so expensive that nobody has ever bothered to market one. I think your best bet is to have a self-powering relay that can only be turned on by a momentary switch. Eric On Mon, Apr 12, 2010 at 1:53 PM, Neil Baylis <neil.bay...@gmail.com> wrote: > Thanks Jim, > > I understand how to set up such a failsafe circuit. But in addition, I > want the actual e-stop switch to activate and latch, so that > regardless of whether the computer generates a fault condition, or I > do it myself, I still have to manually release the switch before > resuming operation. > > > Neil > > On Mon, Apr 12, 2010 at 10:39 AM, Jim Fleig - CNC Services > <j...@cncservices.ws> wrote: >> Hi Neil, >> >> Setup a failsafe circuit with the connection passing through the E-stop >> contacts energizing a relay. If anything in the series circuit becomes >> open >> (E-stop button, relay contacts in E-stop circuit, overtravel limit switch >> contacts, etc.) the functions dependant upon that circuit being closed >> stop >> functioning. >> >> Someone may have a schematic example to share. If not, email me and I >> will >> send you an example. >> >> Have a good day, >> >> Jim >> >> >> >> ----- Original Message ----- >> From: "Neil Baylis" <neil.bay...@gmail.com> >> To: <emc-users@lists.sourceforge.net> >> Sent: Monday, April 12, 2010 1:19 PM >> Subject: [Emc-users] Emergency Stop switch >> >> >>> I'm looking to source an e-stop switch. I have some already with the >>> big red mushroom button that latches when you press it, and must be >>> turned to release. This is good. But what I want is a switch that can >>> also be operated by a signal from the computer. So if the computer >>> detects an e-stop condition, the mushroom button would pop down, just >>> as if I had pressed it by hand. I would drive it from a digital out, >>> obviously. >>> >>> Does such a thing exist, and can anyone point me at a source? >>> >>> Thanks, >>> >>> Neil Baylis >>> >>> ------------------------------------------------------------------------------ >>> 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 >> >> >> ------------------------------------------------------------------------------ >> 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 >> > > > > -- > http://www.pixpopuli.com > > ------------------------------------------------------------------------------ > 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 > ------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------ 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
