On Friday, 4 March 2022 04:55:45 EST gene heskett wrote: > Greetings guru's; > > In order to visualize this in the backplot, which now operates in a > rotate the tool image mode when a rotary axis moves, that won't show me > what is happening in the backtrace. So, would something like this be > doable? > > 1. add a code in the tool table to replace the tool image, currently > either a cylinder or a cone, with a better image of the tool. Like a > cylinder with a round nose for such a tool. A second use for the lathe > tool orientaion used only on a lathe maybe? > > 2. couple the co-ord system to rotate in time with the rotary axis > being moved. This might force the addition of another field in the > tooltable. Enrty=0 for current behaviour, 1 thru 9 for the coord axis > to move, > > 3. force a specified image of the workpiece that rotates with the co- > ordinate system. This might force another entry in the tooltable that > would select a simple image we could make as a 3 entry csg file. > lenght,width,height for instance for long square stock. > > 2.9 seems like its about ready, so could this become a 3.0 target? It > would sure go a long ways toward bringing LinuxCNC's usability into the > new year. Then I could see the thread taking shape in the backplot. > > Or is there a way the backplot can show me the spiral being cut now, > and I'm missing the obvious?
Nope, doesn't work, the cutting tool tips image, regardless of the z offset, moves and traces a straight line when testing it on the go704 with a 4 turn A and a 300mm x move, and back. Is there a way to move the tool tip so it travels and describes the path it takes when traveling at say 35mm above the center of the A or B axis? That should carry it in the spiral path around the rotational center in the backplot and look a lot more realistic to what its doing to the stick, which is actually traveling in a straight line some offset above the center of the stick of maple which is being turned in the instant case by the B axis synchronized to the Y travel. Perhaps a method to touch off to the center height of the rotating axis so the red trace would follow the threads spiral? Or better yet since this stuff is hardware and would only have its height changed by padding put under it, an entry setting its center height in the .ini file? Gotta be a way to make the tool image's tip trace the spiral path its actually cutting. The target here is a 2 start thread form, with a 12mm pitch. Tooth shape being determined by a gradual step offset in the y direction, with Z being dropped by a fixed fraction of the y step, to describe a 30 degree backface angle, a 90 degree front face with total y offset being 4mm + tool diameter. I think thats *.75000 for a z step multiplier. Each start of the thread is then about 6mm wide. Subject to making it match the nut, which is already printed. Since the nut is about 50.8mm (2 inches) long, that can be tested and adjusted as soon as the first notches are carved in the corners of the stick. At that point there's still lots of wood to remove before a fine tuning change wrecks that stick. Help? Thanks all. I think the making maple chips part is about a month down the log yet, as I have to get the 6040 put back together and B & Z calibrated again, so it certainly doesn't have to be tommorrow, or even next week. 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, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
