On Thursday 11 September 2014 12:00:48 David Armstrong did opine And Gene did reply: > 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 PCB mills should be bought with the collars installed, I have found they are quite accurate, with a larger error budget being the randomness of my snugging up the draw bolt on a morse taper collet. > 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 I agree. The present method is, for a machine using morse collets, simply not worth the effort to fill in and try to use a tool table for anything but mill diameter reference. My next machine, if there is one, will have a spindle setup for R-8 or similar tooling. Morse taper stuff is cheap and you get exactly what you paid for it. Crap... > 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/os > > > tg.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.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
