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« on: January 11, 2011, 02:06:10 PM »
The normal thing to do when you start Mach is reference(home) the machine, this will move it to a known position and set the machine coords zero position. The values you normally see in the DROs are the work offset coords, they can be the same as machine coords but usually are different but Mach references them to machine coords so that it knows where it is.
The normal procedure as said would be home your machine then jog to where you want the work to start and then zero the axis DROs. Doing that is you actually setting a work offset and the default is G54. If you then shut Mach down then it will normally ask if you want to save the offset, choose yes and next time you start you home then you can command a move to zero position and it will move to where you last zeroed your axis the previous time.
There are a few settings on General Config page that will affect things, so make sure persistent offsets are chosen along with persistent DROs if you are wanting the values to remain next time you start. Note however that although when you next start Mach the DROs may show the position you were at when you shut down it may be slightly out of position due to steppers moving slightly whilst powering down and up. So always best to home each time you start Mach.
Hood