I admit that compensation confuses me on a lathe. I have no idea if it is cancelling or changing - but why would it change? There is a single G42 at the beginning of the routine. The routine is simply cutting a taper (as can be seen by the steeper lines in the back plot) starting at CurrentDiameter and ending at X-End, Z-End. -Tom
> On Jul 2, 2017, at 5:54 PM, Stuart Stevenson <stus...@gmail.com> wrote: > > Are you sure it is cancelling cutter comp or is it changing cutter comp to > the other side of the programmed path? > > On Jul 2, 2017 4:50 PM, <tom-...@bgp.nu> wrote: > > Yes, I do see different results, the line becomes horizontal rather than > angled. But my question is, why when cutter compensation IS on, are the > moves treated differently. By the way, even if we change the first G0 to a > G1, we still get the angled line. So, it isn’t G0 vs G1, it is simply that > the first move is lower than it should be (by the tool diameter in the tool > table) and the second move in Z causes X to rise to the compensated value. > How/why? > > -Tom > >> On Jul 2, 2017, at 5:29 PM, Stuart Stevenson <stus...@gmail.com> wrote: >> >> You SHOULD see different results. >> >> On Jul 2, 2017 3:46 PM, <tom-...@bgp.nu> wrote: >> >>> I don’t disagree but am failing to see the connection to my question…? >>> -Tom >>> >>>> On Jul 2, 2017, at 4:16 PM, Stuart Stevenson <stus...@gmail.com> wrote: >>>> >>>> It has always been my experience G40 cancels cutter compensation. >>>> >>>> On Jul 2, 2017 2:44 PM, <tom-...@bgp.nu> wrote: >>>> >>>> Why would G0 to a given location in one axis (X) differ such that a G1 >>>> movement in another axis (Z) causes the first axis to move? Let me >>>> explain... >>>> >>>> Attached is a screenshot of the back plot from Axis: >>>> http://bgp.nu/~tom/pub/G0G1.png >>>> >>>> The highlighted line is "G0 X#<CurrentDiameter>" >>>> >>>> However, if you look at the back plot that IS NOT the CurrentDiameter >>> value >>>> where it landed. It MIGHT be "CurrentDiameter - Cutter Compensation”. >>>> >>>> But then 2 lines down I move "G1 Z#<Z-Start>" and the line rises up to >>>> CurrentDiameter. That is, the move “G1 Z#<Z-Start>” is also causing a >>>> move in X to CurrentDiameter (when it should already be there - but >>> isn’t). >>>> Why is this? Why is the G0 move different from the G1 move? Or phrased >>>> another way, why is that first line at an angle rather than horizontal? >>>> >>>> According to the G-Code reference it appears both G1 and G0 are both >>>> affected by cutter compensation so they should be the same shouldn’t >>> they? >>>> >>>> -Tom >>>> >>>> >>>> ------------------------------------------------------------ >>>> ------------------ >>>> 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 >>>> Emc-users@lists.sourceforge.net >>>> 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 >>>> Emc-users@lists.sourceforge.net >>>> 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 >>> Emc-users@lists.sourceforge.net >>> 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 >> Emc-users@lists.sourceforge.net >> 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 > Emc-users@lists.sourceforge.net > 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 > Emc-users@lists.sourceforge.net > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
