Graham, I just went back, restarted my computer, replugged in my Smoothstepper and opened Mach. I homed my machine. I then jogged off of both Z & X axis a few inches. I then put "G28"not followed by any axis designation and pressed enter. The machine started to move in Z first and then in X (I wonder if this is due to an M6End file Hood was reffering to?). In my usual pressing of home, X retracts first and then Z. Oddly enough, the first 3 times I attempted a G28, it retracted as it should (or how I perceive it to work). Then on my 4th attempt the stepper for the tool changer was screamiing against the pawl. Quite odd. What do you think my next course mof action should be besides not using a G28?