it's more for Mills than Lathes Gene, but the usual time it takes to change a tool in a toolchanger , then have to re measure because of a broken bit , half way through a job , especialy those pcb mills !
the number of times iv'e been asked for it , i think it will be worth doing mostly for commercial than hobbyist use , i must admit toolchanging is one thing linuxcnc is lacking , remap is one approach , but unfortunatley it is missing some crucial area's On 11 September 2014 16:25, Gene Heskett <ghesk...@wdtv.com> wrote: > On Thursday 11 September 2014 09:56:56 David Armstrong did opine > And Gene did reply: > > yea sure Gene > > ridgid tappng is next on the list > > and auto tool measuing with toolchanger interface > > so it knows when a tool is replaced in the toolchanger to re-measure > > and update tooltable > > Humm, I was automatically thinking a lathe because that is where I have > done that, but now I think I detect that its a milling machine? > > > problem i have is changing from machine to running gcode and storing > > positional info > > so it can store position , then go and do the tool remeasuring and > > update , thats where it gets screwed ! haha > > Ahh soo.... > > If you come up with a method to do that for a lathe, whose centerline has > no electrical contact to allow probing, I think there would be hundreds of > us interested in a solution to that problem. For a mill, I cannot > envision an automatic or gcode driven method of measuring a tool for too > much more than its projected length. I do have some code that can place > it in the length within a thou, using it for etching & drilling PCB's, and > I can auto center in a hole within that same thou which is sufficient for > PCB work, making holes drilled halfway thru the PCB meet precisely in the > middle of the PCB's thickness, but measuring an odd shaped tool has not > been something I have attempted with the G38.2 function. It would seem > that each tool would need its own calibration jig to match its shape. But > then how does one calibrate the jig? Chicken v egg... > > For the lathe centerline, I have considered making a laser pointer holder, > but I wouldn't think the spindle bore is precise enough to suffice as a > reference so one could just plug the whole thing into the rear of the > spindle and advance the bit to block half the laser as read by a p-cell in > the tailstock. On my 7x12 toy, that bore is fairly roughly machined. > > More luck perhaps with a fixed mount, looking thru the center of the > spindle but I'm in love with the rotation as a method to detect > eccentricity in the beam. And all of that would be slower than making and > measuring a test cut. > > > On 11 September 2014 12:42, Gene Heskett <ghesk...@wdtv.com> wrote: > > > On Thursday 11 September 2014 07:09:16 David Armstrong did opine > > > > > > And Gene did reply: > > > > ok Guy's this has me at the moment > > > > > > > > i wish to switch a relay at a low speed set by the running gcode S > > > > value ? ( say 500 rpm) > > > > i had briefly thrown it at Andy via email and one of his > > > > suggestions was remaping > > > > i had a look at the wiki and the spinde remaping is TBD > > > > > > > > i had thought of monitoring the encoder or motion , but checking > > > > for a speed , or if speed > > > > etc , i can't see any particular similar code or idea > > > > > > > > has anyone done anything similar > > > > i'd prefer to keep it in the hal if possible rather than remap , > > > > but if thats a way then fine > > > > > > In one of my lathe configs, all hal software, not 5i25, I have a > > > couple instances of wcomp, one of which is watching the encoder > > > velocity output, to run the staging of a pair of relays that control > > > the loading for dynamic braking. I also have in that config, the > > > ability to synthesize a stop signal for the turnaround stop when an > > > m3/m4 or vice versa is done by the planner while running the G33.1 > > > rigid tapping cycle. They do not detect the stopped condition, I > > > used a one shot watching an encoder A phase for that. Complex > > > indeed, but it worked well enough that I used it to peck tap several > > > holes with it on a pure parport & cnc4pc BOB only setup. > > > > > > If you are interested in looking at my idiocy, David, I can PM it. > > > Well organized its not. > > > > > > 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> > > > US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS > > > > > > > > > --------------------------------------------------------------------- > > > --------- Want excitement? > > > Manually upgrade your production database. > > > When you want reliability, choose Perforce > > > Perforce version control. Predictably reliable. > > > > > > http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg > > > .clktrk _______________________________________________ > > > Emc-developers mailing list > > > Emc-developers@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/emc-developers > > > > ----------------------------------------------------------------------- > > ------- Want excitement? > > Manually upgrade your production database. > > When you want reliability, choose Perforce > > Perforce version control. Predictably reliable. > > http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.c > > lktrk _______________________________________________ > > Emc-developers mailing list > > Emc-developers@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-developers > > > 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> > US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS > > > ------------------------------------------------------------------------------ > Want excitement? > Manually upgrade your production database. > When you want reliability, choose Perforce > Perforce version control. Predictably reliable. > > http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
