[drgbt]

At the end of my programs my post calls for a G28 A0. This returns my rotary table to 0 but my screen reads 360. When I restart the program the rotary table goes all the way around and reads 0. Isn't 0 and 360 the same place? Is there a parameter to make it recognize this?

[Dan Fritz]

There is a parameter to set the display to zero when you zero-return. You could do the same thing with:

G28 A0
G92 A0

What model Fanuc control?

[drgbt]

Control is an OMD. How does a G92 affect this?

[BluegrassPicker]

I always have programmed it: G91 G28 A0. This takes care of the position display on 11M 15M and up. I don't know about OM though.

[crazythunder]

We have 2 OM with 4th axis and we do it with the G91G28X0Y0A0.

[sinha_nsit]

At the end of my programs my post calls for a G28 A0. This returns my rotary table to 0 but my screen reads 360. When I restart the program the rotary table goes all the way around and reads 0. Isn't 0 and 360 the same place? Is there a parameter to make it recognize this?

Just a wild guess (I am not an expert):
No, 0 deg and 360 deg are not the same, even though the angular position is same. Perhaps the reference angle defined on your machine is 360 deg, and not 0 degree. If so, redefine the reference position for A-axis, and make it 0 deg. This should be possible through a parameter setting where you enter the coordinates. Normally, up to 4 reference positions can be defined, and you can choose where to go (you have to use G30 P_ A_ instead of G28 A_ on OM control). If your machine does not have absolute position detector, then first G28 or manual reference position return will have to be used.