I agree somewhat. :) I think it should be a hal pin or a ini setting sam
On 3/29/2017 12:43 PM, Todd Zuercher wrote: > My personal opinion is that all G0 moves should always be exact stop > positioning moves not blended moves. To treat them as anything else seems > silly. If the previous behavior of Linuxcnc was to blend them, then it is > just plane wrong and should be corrected. Having multiple G0 moves executed > after each other is somewhat of an unusual situation to start with. And is > the reason I had never noticed that G0 moves were blended in the old planner. > But neither planner blends a move between a G0 and G1 move as far as I know. > Because of this most people never notice. I am pretty sure G0 moves are > exact stop positioning moves in all the other CNC controls I have worked with > (Fanuc, and others). > > ----- Original Message ----- > From: "sam sokolik" <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Sent: Wednesday, March 29, 2017 11:22:10 AM > Subject: Re: [Emc-users] Version 2.7 positioning problem during cnc > operations > > The cheap and dirty way would be to add > add in the TRAJ sectio/n > > ARC_BLEND_ENABLE = 0 > > /This puts the trajectoy planner into pre 2.7 mode (pre circular arc > blend - 1 segment look ahead) > > You obviously lose x segment look ahead. During testing exact stop mode > happened between G0 and contouring moves - but that changed the behavior > of linuxcnc so I think it was taken out. (now it blends between all > segments types.) > > Currently the fix is adding G64Px.xxx at the beginning of all programs. > > sam > > // > On 3/29/2017 9:37 AM, Stuart Stevenson wrote: >> Gentlemen, >> This is connected to the G64 question I asked on the developers list >> yesterday. >> >> G64 P0 does not change the positioning problem on the machine. >> >> Problem description: >> desired machine motion >> position XY with Z above the material/work level >> move Z to material/work level >> face mill top of material >> >> encountered machine motion >> position XY with Z above the material/work level >> result as expected >> move Z to material/work level >> result not as expected - as the tool approaches the final Z >> position >> the tool moves an amount >> toward the final XY position >> and cuts into the >> material/stock >> face mill top of material >> result as expected >> >> The work around has been to add an intermediate point after the z move that >> will cause the rounding to fall short of the material/stock >> The BIG problem is the customer has many proven/certified programs making >> parts on this machine. The quality manual requires a full first article >> inspection procedure to be performed on the resultant machined part after >> ANY change in the process. This is not acceptable to the customer. >> Customer wants the machine to just perform like it did with the previous >> (old) linuxcnc version. >> Customer is asking for revision to old version if fix is not able to be >> accomplished rather quickly. >> >> thanks >> Stuart >> > ------------------------------------------------------------------------------ > 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 > > ------------------------------------------------------------------------------ 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
