determine why my sub programs have an extra 2" added to them

[honeybunches]

We are horsing around with sub programming and cannot figure out why we are getting an extra 2" added to Z everytime it moves to another offset. Clearance is not turned on and should move at .6". I will post the example.

 

( Center drill ring )

N2 T02 M6 ( .25 DRILL )

M8

G0 G90 G57 X1.769 Y-1.3 S4000 M3

G43 H02 Z.6

M97 P200

G0 Z2.6

G56 X1.769 Y-1.3

Z.6

M97 P200

G0 Z2.6

G55 X1.769 Y-1.3

Z.6

M97 P200

G0 Z2.6

G54 X1.769 Y-1.3

Z.6

M97 P200

M9 G0 G28 G91 Z0

G90

[Simtech]

Make sure you don't end with a G91 move in your sub-program.

You should just make sure and add a G90 to the line immediatly after the sub call, ie, G0 G90 Z2.6

[Mike S @ S4A]

check the X distance on the translate tab,

and check the box on tab one to translate origin only

[honeybunches]

The Z 2.6 can go away all together. There are Z commands in the program. I am trying a multi offset post for the offsets so I am not using translate for this. However, there may be a setting I am missing that is causing this. Not sure. It is adding exactly 2" to every tool and op

[Simtech]

Well then that explains it: Z2.6 - Z.6 = Z2.0

 

This is where the error is coming from. You could try returning the machine to it's home before calling a new coordinate system (G91G28Z0).

How are you writing your subprogram? What's the Z value in your G56, G57... values?