[Stupidav]

We are trying to do a reposition of material on our turret press. For everything we read it looks like we do a:

G27 X.... X = amount of move

The only problem is it seems like no matter what we put in to the X Value we constantly get either a +X Over Travel or a -X Over Travel alarm. What are we missing.

Initially in the program we are setting G92 to basically the Reference Zero point, which is where our sheet is. Prior to issuing the G27 we do a G70 and move the machine close to the G92 point or refernence zero.

What am I doing wrong?

[perfpro]

I suggest leave the G92 as the machine coordinates, G92 X79. Y50.
Use G98 to set the work coordinate 'offset'. G98 X... Y...
The G70 X absolute value must be greater than the repositioning travel distance. (The G70 X absolute value = X coordinate + offset)
Try repositioning first without any offset, to see if it works.
A program example would be (assuming G20 inch specification & G90 absolute programming)
G92 X79. Y50. (if your machine is 79" x 50")
G70 X79. Y40.
G27 X30. (to reposition 30")
G50

[obelisk]

It all depends where the x axis position is before you reposition. There has to be enough travel left in the ball screw to at least move the reposition amount.

G92X79.Y50.
G70X30. Y50.
G27X30.
...

Make sure that the 'X' value in the G70 is equal or greater than the reposition amount in the G27. This always works when you are repositioning forward.