Rob, AFAIK, when resuming a program you need to do a G92.3 to "restore" the offsets from the last G92. When the program stops running the G92 is no longer in effect. When use from MDI it remains in effect. Read the last paragraph in section 15.19 of the G-Code section of the user manual for how to use offsets in multiple programs.
John On 24 Jun 2008 at 7:18, Rob Jansen wrote: > > I know this is probably my own fault for not having limit and home > switches (yet) > > But I keep getting headaches from the Axis behavior of the touch > off function in Axis. When I move my zero position finder and then > try to do a touch off with 4mm to get the home coordinate, > suddenly the OK button in the touch off window becomes grayed out. > It works sometimes but not ever. Is there some kind of dependency > on previous homing sequences? > > having this problem I started to use the G92 in the MDI window. I > wanted to try this anyway because I want to automate this > procedure using a probe to prevent any future problems (I just > crashed my $75 LED homing sensor due to having the wrong increment > set when moving ...). It looks like this made the problem worse: I > can't even do a normal homing anymore after using G92. A short > example: > > I switch on the machine and do a normal homing using the home > button, now X=0. I do a touch off (using G92 X-4), do my milling > and prepare for a second job. When I now press the home button > then X becomes -4 (the value of the G92 command) This looks OK but > when I now move the X-axis 1 mm further and do a new G92 X-4 > command then pressing the home button sets X to -5. > > Some of my work involves a concatenation of multiple milling > programs (using absolute coordinates) where I placed a sequence > like "G0 X100, G92 X0" on two lines in between the different > programs. in this way I get multiple parts out of one sheet. > Things get worse now. When I stop in the middle of a program using > multiple G92 commands, the home position is not what I expect it > to be (i.e. the one defined by the last G92 command). > > Am I just misusing a feature here or is this something which is > fixed in a newer release? > > Regards, > > Rob ------------------------------------------------------------------------- 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
