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 ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
