While working with the plasma cutter this weekend we noticed strange behavior on the DRO overlay on the preview plot in Axis.
When attempting to run a program we were getting -z limit switch trips due to needing more debounce on the switch. This switch is used for touch off probing and for -z limit when not doing a probing move. So while debugging the debounce issue we noticed some strange issues with the Z axis readings after the limit switch was tripped. Once the trip would occur we would do a manual Z axis touchoff to get a preliminary rough Z zero. However once the touchoff button was pushed the value shown on the DRO overlay on the preview plot would show some random number from 0.012 to 0.240 inches. There was no offset applied to the touchoff and there are no tool length offsets applied. The stranger thing is that if you switch to the DRO tab then the value shown for the Z axis is 0.0000 every time. To make the preview overlay dro show the 0.0000 value I would have to manually change to G55 then back to G54 and the value would show properly. This is all with version 2.7.4. Note that this machine is operating with stepper motors and no encoder feedback. Also note that the strange value would not happen every time but ~90% of the time. Let me know what you think. Is this a bug. It was very repeatable on this machine but I am not sure if it is repeatable on other machines. I have not had time to try it on any other machine yet. Thanks, Jim ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
