On Sunday 12 April 2015 15:41:21 Neil wrote: > The touch-off is different as far as I've discovered so far. My min > and max Z is -25 and +100 in the .ini file. If I move to what the > machine thinks is 0 (wherever it was when the table booted up), and > touch that off to say 40, then the machine will still only move -25 > *from there*... so min would then be +15. What I want is to change > the machine coordinates, telling EMC that the machine was not at zero > on power up, and tell it where 0 is (which is what homing should do). > > Thanks.
If you have a "position.txt" file set in the ini, nuke it and the file it generates, and it will then default to 0,0,0 regardless of where it is physically at, at powerup. This is as opposed to having it at 25,25,25 when it was exited. With the file specified, it will init itself ack to where that file tells it it was at shutdown time. Even if the machine has been moved to the other end of its travel while powered down. This ambiguity is precisely why you cannot home it once a month. Then the only consistent knowledge of where it is, will only be known After its been homed. There are times when I prefer one behavior, and times when I prefer the other. The problem with the position.txt file is that the machine may have been moved by hand when LCNC isn't running, so you can't swear on any version of the bible that its memory (from the position.txt file), is valid. With stepper motors in the mix, its a guaranteed error of up to 4 counts if microstepping by /8, a very common setting used with steppers. 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> ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
