Loop routine on Okuma C-axis Lathe

[tsaladyga]

Hi guys,

 I am trying to come up with a looping routine for our LB4000 C-Y axis  Lathe and I am having trouble getting the code to work.

Can someone look at it and let me know what I am doing wrong? Basically I am starting at 9.5 inches and  working my way .04 at a time until I get to 7.5. I would like the start

and finish diameters to be variable so the operator can easily modify based on customer specs. 

Thanks,

Todd

NT7
( .875 MILL)
T0707
(7/8 MILL)
G136 ( Y Axis Mode/Coordinate Conversion:ON)
M110 (  C-Axis Joint:ON)
SB=3400 M13
M175
CALL OTURN XX=9.5 XXX=7.5
M09
M12
M109
X20
Z30
M30

OTURN
NLOOP
G0 Z-.88
G0 C180
G0 X10.25
M08
M15
G0 X=XX
XST=XX
XDT=-.04
G01 G91 X[XDT] F.02
XDT=XDT+XST
G90
G01 G91 C359 F.03
G90
G01 Z-1.4
M16
G91
G01 C209
G90
G01 Z-1.875
M15
G91
G01 C170
G90
G01 Z-2.301
M16
G91
G01 C170
G90
G01 Z-2.7
M15
G91
G01 C170
G90
G01 Z-3.1
M16
G91
G01 C170
G90
G01 Z-3.5
M15
G91
G01 C359
G90
IF[XDT GE XXX]NLOOP
G00 X10.25
RTS

[jeff]

If you want to loop a sub, put a Q and the # of times you want it to loop.

CALL OTURN Q15

I can't remember if there is supposed to be a space before the Q or not though.

[tsaladyga]

Thanks Jeff, but I don't think that's  what I want.

I am looking for it to have a start point and an end point and count down by depth of cut until it reaches the final depth.