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JamieR · Posted: Wed Jun 30, 2004 12:42 pm Post subject: Okuma lathe programming question

I'm trying to learn to program a Okuma CNC Lathe and am having difficulty with a aspect of the program. I'm trying to use G85 to cut a bore but the machine wants to rapid into the part and feed out instead of doing just the opposite. Here is my code, please let me know when is wrong with it. I'm learning from the book and it just isn't helping me.

N8 G0 X30. Z20.
T080808 S1500 M4 M8
G96 S1500 X2. Z.25
NBORE G81
G0 X2.025Z-1.3
G1 X2.89 F.008
Z-1.05
X3.24 Z-.88
X6.485
Z-.05
G2 X6.585 Z0 L.05
G1 X8.725
G80
G85 NBORE D.25 F.01 U.02 W.005
G0 Z.25
X2.
G87 NBORE
G0 Z.25
_________________
++++++++++++++
Thanks!

JamieR · Posted: Wed Jun 30, 2004 12:43 pm Post subject:

I finally figured this out. The key was to program it from the outside to the inside, but position the tool at the inside to begin. Here was the final code that worked. Thanks for all the help.
GOX30.Z20.
X1.5Z.25G96S1500M4T080808
G85 NBORE U.02W.005D.25F.01
NBORE G81
GOX8.725Z.25
G1Z0.F.008
X6.545
G02X6.485Z-.03L.03
G1Z-.88
X3.24
X2.89Z-1.2
Z-1.3
X2.75
G40
G80
G0Z.25
G87 NBORE
G0Z.25M9
X30.Z20.
Very Happy