Hi Andy I don't remember the details of your machine but if it's servo with encoders you might look at the location of the index pulse with respect to the angular position where the home switch closes or opens. In the old days we called this stuff a grid and if the switch closure was right close to the index it could jump a full rotation, or in the case of a resolver 1/4 of a rotation. IMO it's a good idea to put the index pulse a half rotation away from the switch change.
Rayh On Sun, 2007-09-09 at 21:46 +0100, Andy Ibbotson wrote: > Hello Everyone, > > Over the last few nights I’ve experienced a coupled of “odd” events > with EMC 2.1.7 – normally runs flawlessly. Running AXIS I’ve homed > all axes to zero and then commenced running my Gcode. Last night the > Y axis home position appeared to jump by 0.400” (as seen on the DRO), > axis still reported Y home at 0.0000. Tonight a similar thing > happened with the Z axis. Initially DRO Z and AXIS Z were zeroed and > followed one another to within ½ thou (which is okay for me) then > following a return to Z = 0.0000, the DRO read +0.0250 and AXIS still > reported Z=0.0000. The cutter was obviously offset from the workpiece > so I stopped the programme, rehomed everything and started again, > this time with no problem. Has anyone else experienced similar > behaviour – I’m guessing not since I haven’t seen any posts. > > Regards > > Andy > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
