On Sunday 03 May 2015 09:21:55 matic bie wrote: > > From: [email protected] > > To: [email protected] > > Date: Sun, 3 May 2015 06:22:32 -0400 > > Subject: Re: [Emc-developers] where the whole path is divided into > > segment by segment > > > > Ahh, I see. It will help if you mentally substitute the "0" with > > "where it is at", its already there from the previous move so you > > don't have to restate it for the next move, so you supply only the > > "target" to move to, and bear in mind the target can be selected as > > either an absolute location, or a move relative to where it is at. > > Also controlled by a G-code, its in the user manual. The machine > > doesn't come to a full stop (generally, but you can command it to) > > but that is how I think about it. > > > > This generally is how one would do a "step & repeat" operation > > series, you position the machine to the start of the each series in > > absolute mode, switch to relative, and call the same subroutine each > > time, returning to the absolute mode to set the step position of the > > next repeat. > > > > If you look at some of our code, you will often see a large surplus > > of precision stated where .001" is close enough but we'll > > write .0010000000, but that is how the accumulation of rounding > > errors is best handled. Works for me anyway. OTOH, I'm not carving > > new lenses for the hubble either. :) > > > > I hope this helps.> > > Thanks. Usually, how much is the length of the target? In which > function is the target calculated from G-code?Best regards.
I am not /that/ familiar with the gcode interpreter to have that memorized. What I really am is the lists official old fart at 80 yo. I am a retired television Chief Engineer who is actually a Certified Electronics Technician who fixed anything that ceased to work, or didn't work correctly at a medium market tv station. Getting an early start, I was 12 when I wired the house my father was building us to live in after WW-II was done and normal living resumed. I was 14 when I started fixing these newfangled tv's for a living. Officially an 8th grade education. Self educated in electronics. Back to this, I would state that the axis values passed in a given line of g-code are, if in absolute co-ordinates mode, will be taken as the go to point in absolute from "homed at zero" space. If the interpreter is in relative distance mode, then the X# [Y# Z# A# B# C# U# V# W#] will be the new goto point measured from where it was in its view of its working envelope at the completion of the prior line of gcode. That is essentially all I need to know about this aspect of the interpreter to make use of the gcode and make things. So I will now bow out, and let someone who is familiar with the inner workings explain it better. I might actually learn something myself! 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> ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
