Well I'm glad that machinekit now has this scenario covered. > On 03/22/2016 05:31 AM, Nicklas Karlsson wrote: >> No the real time tasks in the work shop may be running by themself or >> waiting for answer from GUI but you can't trust the emergency stop. If you >> are on the beach emergency stop will not matter anyway unless you are >> machining a large bomb. >> >> >>
On 03/22/2016 05:27 AM, Bertho Stultiens wrote: > On 03/22/2016 11:15 AM, bari wrote: >>>> How real time do you want the GUI? Is a few second lag behind the >>>> machines state ok? How about E-stop or Start/Stop from the UI? What's >>>> safe? 1 second max, 10 seconds? If you are milling while at the beach >>>> miles away does it matter? What problem are we solving? >>> E-stop should be handled with a hardware approach. >> But if my phone has the GUI and I'm at the beach do I need to run an >> extra pair of conductors back to the machine? > If you want to do it right, then yes, you need to run a few extra wires > to your phone. And then some current-loop to ensure that your long > running wires are still working. > > The whole point of an emergency stop is that it is virtually impossible > not to work. It must really work in an emergency, not just when you > happen to have a network connection... > > Wires and real switches are still several orders of magnitude more > reliable than the best wireless network. Even wired networks are not as > reliable because there are so many intermediate levels that can fail. > Making a "fail-safe" system is a hard job, and using physical wires and > switches is still the best way. > ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785351&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
