I already talk about why I can not use slicing program . If one can do change to existing slicing software then I am interesting to talk.
All new thing can be multidisciplinary. That is why I only taking very specific nerrow subject. On Mar 11, 2018 12:17 PM, "Chris Albertson" <[email protected]> wrote: > It sounds like you are considering reversing the tool path of an > additive machine. That can't work. The tool end would have to pass > through solid material. > > If the goal is to have your additive machine create different surface > properties for material near the edges then this is typically done in > the slicer software. All slicers to this. They lay down the > material that can be seen and touched differently from the material > inside the part. The simplest example is "infill". All slicers > can creat low density infill. Another example is what they call > "ironing" where they move the hot extruder over the exterior surface > while not extruding any more plastic. The hot metal flattens out any > bumps. It should be possible to add other surface treatments to the > slicer software. > > > On Sun, Mar 11, 2018 at 5:36 AM, Gene Heskett <[email protected]> > wrote: > > On Sunday 11 March 2018 05:54:08 Andy Pugh wrote: > > > >> > On 11 Mar 2018, at 06:03, a k <[email protected]> wrote: > >> > > >> > i want reverse tool path. > >> > >> No, you don’t. > >> > >> A reversed tool path will still put the tool outside the part > >> material. > >> > >> Just use a 3D printer slicer and configure your machine with a dummy > >> extruder axis that does nothing. > > > > That to me, still doesn't quite get the job done. He needs to hook up the > > extruders wire feed to the plastic feed, and some way to turn off the > > fire when jumping across an opening in the pattern, and restarting the > > fire when its moved across the empty opening. The fact that the machine > > can lay down a much thicker line of metal in one pass than the 3d > > printer can should just be a matter of programming the slicer for a > > thicker slice. In fact it may be worthwhile in reduced "finishing" work > > to design a new smaller "extruder like" mechanism to handle say .015" > > diameter wire, as that would reduce the final pass to size to a single > > pass, possibly with EDM if its a thin walled and easily distorted item.. > > > > It might even be helpfull to replace the drive motor on the "extruder" > > with a reverseable motor so that the wire can be withdrawn far enough to > > extinguish the arc. The rest of this I see as a hal file composition > > exercise, hooking up SSR's to control the arc, and some sort of a THC > > like arc starter. In fact, let the THC output control the x/y feed speed > > as a way of laying down a consistent thickness of metal. > > > > It would also be a good idea to have the workspace flooded with the near > > inert CO2/Argon atmosphere. The CO2 adds carbon to the puddle, making > > the resultant metal layer much harder than straight argon by itself > > would. It wouldn't matter if it leaked, as long as the working envelope > > was flooded to keep slag at bay because that would make the arc restart > > simply a matter of fireing the SSR and extending the wire until contact > > was made again, letting a feedhold hold the starting position until the > > arc was started, long enough to make sure the metal was being > > transferred. The flooding gas would ensure a clean, oxide free > > interface, making the arc so much easier to restart you'd wonder why you > > ever bothered trying w/o it. The initial startup might need a delay > > after gas turnon to assure its well flooded else the weld would slag > > over once the head had moved on, at least long enough for the weld to > > cool. > > > > Or perhaps I don't fully understand the problem. Its certainly something > > LinuxCNC can do once the slicer has created the laydown paths from the > > 3d model. > > > > Aram hasn't given us any hint at how big the working envelope of the 3d > > metal printer might have to be as that will determine the gas economics. > > In the size bottles I use, a big box can get expen$ive to flood. > > > > -- > > 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> > > > > ------------------------------------------------------------ > ------------------ > > 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 > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > -- > > Chris Albertson > Redondo Beach, California > > ------------------------------------------------------------ > ------------------ > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
