On Tuesday 23 April 2013 16:16:48 Stuart Stevenson did opine: > Gene - The parabole function may not work but I see the hyperbole button > is working. :)
ROTFLMAO! Thanks for the flowers Stuart! But, really, does it HAVE to be that picky? Seems to me that .0001" or .005mm really ought to be close enough for the girls we go with. :) > On Tue, Apr 23, 2013 at 10:57 AM, Gene Heskett <ghesk...@wdtv.com> wrote: > > On Tuesday 23 April 2013 11:30:19 andy pugh did opine: > > > On 23 April 2013 15:57, Gene Heskett <ghesk...@wdtv.com> wrote: > > > > The biggest confusion to me yet is that even though > > > > the machine is in absolute movement mode, G2/3 moves are still > > > > made relative to where it starts from, > > > > > > See G91.1 > > > http://www.linuxcnc.org/docs/html/gcode/gcode.html#sec:G90_1-G91_1 > > > > I did look at that Andy, and did do one move successfully with G90.1 > > in effect. But when I tried to do the next pass, cutting a little > > more off incrementally, because it was all from only one side of the > > ellipse, it all went to hell with the error message saying I wasn't > > off a thou, but 70+ percent of the radii for a 3 thou change in the > > end point location. > > > > I finally gave up and went to the discouraged r mode, which worked > > perfectly once I had figured out how to pre-calc the r parts. > > > > The I/J/K mode may be the preferred mode, but if not accurate out to > > about 16 or 17 decimal places, it prefers to throw essentially > > meaningless errors at you instead of carving metal, or even video > > screen pixels. > > > > What is the path tolerance thing, G64? In any event, it has no effect, > > you can tell it to use a .5000" tolerance but you cannot get past the > > brick wall that is the error checker for g2-3. Unless you are trying > > to carve a new mirror for the Hubble, I see zero practical use for > > sub-angstrom level accuracy checking. Besides, that would not be an > > arc, but parabola, something I don't know that linuxcnc can do all as > > a canned function. > > > > Simply put, you cannot /see/ the error because it won't even draw it > > in the backplot. > > > > Put even simpler, its a pain in the ass. The absolute worst, hands > > down by a very wide margin, command to "get right" in linuxcnc. When > > you finally make it work, you've got enough time in 12 lines of code > > out of 300 to have bought lottery tickets and won $2, for only a > > $10,000 investment. Whoopy Ding, I won! NOT... > > > > 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> > > Results are not typical. > > A pen in the hand of this president is far more > > dangerous than 200 million guns in the hands of > > > > law-abiding citizens. > > > > ---------------------------------------------------------------------- > > -------- Try New Relic Now & We'll Send You this Cool Shirt > > New Relic is the only SaaS-based application performance monitoring > > service that delivers powerful full stack analytics. Optimize and > > monitor your browser, app, & servers with just a few lines of code. > > Try New Relic and get this awesome Nerd Life shirt! > > http://p.sf.net/sfu/newrelic_d2d_apr > > _______________________________________________ > > 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> BOFH excuse #421: Domain controller not responding A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
