> Nicklashello > the time from voltage turn-on until the voltage dropis the ionization time > this can be used as an indication of the gap 'clean'. > > as the cut progresses and more debris is generated, > this time measure will change and decrease > because the debris will reducethedielectric quality (the anti-conducting > quality).
Time for a peck cycle? > IF the time is too small, > then the gap is dimensionally too small ( too close ) > or too dirty ( needs 'peck' cycle ) > or more fluid flow ( sweep up the dirt ) > or more offtime or a combination of these > > this ionization monitor cause & effect loop should be faster than 100mS > you cant change flow rates that quickly but you can add offtime to > subsequent pulses > other strategies are in scientific papers > > re: The sparc counter > not sure what the count deal with yet > it sounds like you could get a number related to (sparcs_attempted / > sparcs_actual) = sparc_efficiency > and then see if adjusting edm servo target voltage or offtime would > increae that ratio Yes "ionizations attempted"/"sparcs", then to high a peck cycle is needed? > adaptive control in edm is a great idea > BUT > make sure the adaptive control can be turned off! > many times in AGie and Elox and Mitsubishi cutting, we found that > turning the autopilots off was neccesary > ( let ME drive the damn thing!) I wait with adaptive control until I figured out how it works but to present some kind of average seems like a good idea. There is: Number of ionizations. Number of sparc. Some theorethical numbers. It might also be possible to measure some times like time to ionization or other if this provide some useful information. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
