Dirk, What you are seeing is the waypoint function of G28. G28 X5 Z5 will move to X5 and Z5 from the present position then move to X0 Z0. This is for obstacle avoidance. G28 will always end up in the home position.
John On 22 Jun 2008 at 14:06, John Thornton wrote: > G28 goes to a predefined position (home as defined in parameters > 5156-5166). > > To make G28 go to 0,0,100 you must home the machine there which will > become 0,0,0. Then a G28Z0 with no space will home the Z axis only. > The space between the G28 and the axis must call up an undocumented > feature... > > John > > > On 22 Jun 2008 at 19:08, Dirk wrote: > > > > > Hi all, well, just deleted my question. When double checking all the > > facts, reproducing the problems, I got some clue about what was > > going wrong. But there is still 1 thing unclear. My postprocessor, > > NX5, made with postbuilder, automatically adds a G28 at the start of > > the program. Since I have a very slow z-axis, which can also get > > dangerously close to the workpiece if it hase a tool in it, I don't > > want the G28 to go to 0,0,0. I configured emc so that a homing > > sequence will put the x and y stage at 10,10 and the z-stage at 180. > > Can I get emc to use G28 to go these coordinates? Or do I have to > > remove the G28 from the postprocessor and put G00 X10 Y10 Z180 in > > it? It seems that G28 Z100, for instance, first goes to 0,0,0 and > > than goes to 0,0,100. > > > > I love this stuff, but there is so much to figure out. Especially > > since I have to configure a postprocessor and a cnc system at the > > same time. I am never sure which one is misconfigured. > > > > Dirk > > > > ---------------------------------------------------------------------- > --- Check out the new SourceForge.net Marketplace. It's the best place > to buy or sell services for just about anything Open Source. > http://sourceforge.net/services/buy/index.php > _______________________________________________ Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
