On Monday 15 April 2013 21:05:25 Gregg Eshelman did opine: > How about a couple of scripts that launch LinuxCNC in various ways, > including one that nukes the troublesome files first?
Precisely what is running in my mind too, but I need to find my round tuit. And my weed eater... I bought a small LCD monitor ($20) that can hang right over the lathe at a flea market over the weekend and it tested out good, but today I was putting the finishing touches on that BP rifle I've been working on as I broke it at the range yesterday, so its now about 100x stronger at that point. I also bought, new in box with all packaging, a linksys wr54-gs router for another of those famous 20 bills from the same way out in the sticks yard sale. I can install DD-WRT on it and have another backup router if this one dies. > Should be able to have some scripts create or copy those files from > another location so you could have many different setups with a single > install of the software. Exactly. I already have a separate setup for use with boring bars. Separate scripts does seem to be the way to go. > --- On Mon, 4/15/13, Gene Heskett <ghesk...@wdtv.com> wrote: > > From: Gene Heskett <ghesk...@wdtv.com> > > Subject: Re: [Emc-users] How about the core[X,Y] drive? > > To: emc-users@lists.sourceforge.net > > Date: Monday, April 15, 2013, 12:28 PM > > On Monday 15 April 2013 13:22:31 > > > > Viesturs Lؤپcis did opine: > > > 2013/4/15 andy pugh <bodge...@gmail.com> > > > > > > > On 15 April 2013 11:00, Gregg Eshelman <g_ala...@yahoo.com> > > > > wrote: > > > > > The crossover counters any offset push at one > > > > end of the gantry with > > > > > > > an > > > > > > > > equal pull in the same direction at the opposite > > > > end. The theory page > > > > > > shows how it works. > > > > > > > > I have stared at the diagrams for long enough now > > > > that I have changed > > > > > > my mind several times. I might have to build one > > > > to see. > > > > > > > Does LinuxCNC have H-bot support? CoreXY > > > > should drive identically. > > > > > > Not built-in, but: > > > > > > > > http://www.linuxcnc.org/index.php/english/forum/38-general-linuxcn > > > > c-qu estions/26302-cnc-avec-systeme-h-bot-ou-corexy > > > > > > Hmm, it is not the first time I see links to that > > > > Russian forum and with > > > > > every time I get stronger and stronger impression that > > > > those LinuxCNC > > > > > users that hang out there is a completely separate > > > > community... > > > > > Anyway, I just cannot figure out, how to set up homing > > > > routine to home > > > > > such a machine to some switches. > > > > Use the sign of the HOME_SEARCH_VELOCITY to control which > > switch its > > looking for.آ Then HOME_OFFSET with a sign can set home > > to any position.آ > > Then in case the home switches are off in a corner someplace > > and you have > > to jog the machine to a suitable starting position before > > invoking the > > homing operation, run it to where the first switch is > > available quickly, > > and use the HOME_SEQUENCE number to put all the home ops in > > the proper > > order. > > > > On my lathe, a grep of the .ini for HOME returns this: > > In [TRAJ] > > HOME_ALLآ آ آ = 1 (one home all button in > > axis) > > > > In x [AXIS_0] > > HOME = 1.250آ (where it parks it when done) > > HOME_IGNORE_LIMITS = YES > > HOME_USE_INDEX = NOآ (if servo's, could be useful) > > HOME_OFFSET = 0.01000000 (where it marks it as 0.0 from > > where its at) > > HOME_SEARCH_VEL = -0.08 (in machine units, IPS IOW) > > HOME_LATCH_VEL = -.008 > > HOME_FINAL_VEL = -.1 > > HOME_IS_SHAREDآ آ آ = 1 (one logic signal is > > input for all homes) > > HOME_SEQUENCEآ آ آ = 1 (second one to be done) > > > > > > In z [AXIS_2] > > HOME = 4.250آ (where it marks it as being when > > finished) > > HOME_IGNORE_LIMITS = YES > > HOME_USE_INDEX = NO > > HOME_OFFSET = 4.090 ( distance in this case from left face > > of gauge to face > > of pcb on right face of gauge) > > HOME_SEARCH_VEL = -0.08 > > HOME_LATCH_VELآ آ آ = -0.015 > > HOME_FINAL_VEL = 0.25 > > HOME_IS_SHARED = 1 > > HOME_SEQUENCEآ آ آ = 0 (first to home) > > > > I place a gauge I made on the ways, backed up against the > > work piece as > > chucked, place a cleaned cutting tool next to the pcb copper > > that is the Z > > detector on the gauge, and hit the HOME_ALL button,آ It > > searches z for > > contact, sets the home offset such that 0.0z is shaving the > > rust off the > > chuck jaws, or if work is chucked, touching the face of the > > work.آ Then it > > backs away a wee bit and searches inward to find the contact > > for the x > > home, finds that piece of pcb, sets home to pretty close to > > the center of > > the work (I'm still fine tuning that) then parks the tool > > back out of the > > way till its needed. > > > > yerp, buzz, yerp, yerp, buzz, yerp, done in about 7 > > seconds. > > > > If the ways and base of my tool are lox clean, repeatable to > > under .001".آ > > That however is a major problem for x as it tilts the gauge > > just for a good > > coat of vactra on the ways.آ I need to make the rear, > > huge flat area into a > > single point contact with the back in order to penetrate the > > oil film and > > possibly leave a little room for dust, between it and the > > flat back way on > > that toy lathe. > > > > The man page on homing could be clearer, but careful rereads > > will point the > > way as there are many, many variations.آ And there are > > N! ways to screw it > > up.آ :) > > > > The only fly in this ointment is that it all goes totally, > > absolutely to > > hell if you have applied /any/ touch offs, and in my case I > > would call not > > canceling the touch off in effect as the first thing the > > homing operation > > does a bug.آ Ditto for trying to use position.txt, as > > that also > > contaminates the zero's this sets. > > > > IMO its a BUG, and for me a BIG BUG, requiring that I first > > stop linuxcnc, > > nuke the position.txt AND the linuxcnc.vars files before > > restarting > > linuxcnc, so that it truly starts from scratch when homing. > > > > Touching the HOME button should first NUKE any touch off > > offsets in effect > > at the time for the axis being homed. > > > > It does not, so home is then relative to the &^$#@ > > offset.آ I have broken > > tools and wrecked nearly finished parts because of this, > > several times. > > > > Is there a valid reason for the current, save the offsets > > behavior? > > > > Cheers, Gene > > ------------------------------------------------------------------------ > ------ Precog is a next-generation analytics platform capable of > advanced analytics on semi-structured data. The platform includes APIs > for building apps and a phenomenal toolset for data science. Developers > can use our toolset for easy data analysis & visualization. Get a free > account! http://www2.precog.com/precogplatform/slashdotnewsletter > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> The sudden sight of me causes panic in the streets. They have yet to learn -- only the savage fears what he does not understand. -- The Silver Surfer A pen in the hand of this president is far more dangerous than a gun in the hands of 200 million law-abiding citizens. ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
