On Wednesday 24 August 2016 22:06:51 Jon Elson wrote: > On 08/24/2016 12:02 PM, Gene Heskett wrote: > > On Wednesday 24 August 2016 12:39:39 Jon Elson wrote: > >> OK, so when a ferrous object passes left-to-right across the > >> sensor, the output goes high, and then holds. > >> When the object passes right-to-left, then the output goes > >> low, and holds. > > > > That would work for either limits or homeing I think. I have my > > microswitches set so whatever trips them can pass by, but it quite a > > ways before the lever would open the switch again. > > Well, except that there's flip-flop with a power-on reset > state. So, if the machine were left in the limit exceeded > position and powered on, the sensor might send the > not-tripped state. Or, if left in the middle of travel, the > sensor could power up in the tripped state. Also, anything > ferrous that passes near the sensor could flip it to the > other state, where it would remain. I really don't think > this sensor is right for a limit sensor. There are plenty > of good sensors out there that don't have this memory issue. > > Jon
That power up state doesn't sound so useful. I'll keep that in mind. Thanks Jon. > > ---------------------------------------------------------------------- >-------- _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
