Siemens SINUMERIK 808D ADVANCED - Page 104

Programming and Operating — Turning Page 104 808D ADVANCED
ISO Mode
s
BASIC THEORY
P. Descriptions Unit Applied range and note
X/Z Cutting end point X/Z absolute coordinate
values
mm G90 / G94 / G74
G75 / G92 / G76
U/W
Absolute coordinate difference between
start point and end point at X/Z
mm G90 / G94 / G74
G75 / G92 / G76
X/Z tool retraction / finishing allowance
mm G73
R
Radii—difference between start point and
end point
G90 / G94 / G92
Each radial/shaft (X/Z axis) tool retrac-
tion e
mm G71 / G72 / G74 / G75
Cutting times d G73
Thread finishing d / thread cone i
mm G76
P
Single radial cutting cycle at X axis Δi 0.001mm G74
Feed at X axis Δi 0.001mm G75
Thread finishing turning time m /thread
retraction length r
Angle between two nearby thread teeth
a / thread tooth height k
time / 0.1 times
thread lead /
0.001mm
G76
Feed at Z axis Δk 0.001 mm G74
Q
Single radial cutting cycle at Z axis Δk 0.001 mm G75
Minimum roughing thread Δd
min
Thread first cut depth Δd 0.001 mm G76
F
Cutting feed speed mm G90 / G71 / G72
G73 / G94 / G74 / G75
Thread lead in metric system F(I) mm G92 / G76
I Thread teeth/inch in inch system G92 / G76
Frequently used letter meanings of typical fixed cycle codes in ISO mode Brief introduction of typical fixed cycle codes in ISO mode
For the meaning of letters when programming typical fixed
cycles, please refer the figure on the left!
G90 shaft cutting cycle
Programming structure:
Cylinder cutting
G90 X / U—Z / W—F;
Cone cutting
G90 X / U—Z / W—R—F;
Note：Please follow the speci-
fied structures when program-
ming！
G90 sample example：
O0002;
M3 S300 G0 X130 Z3
G90 X120 Z-110 F200 A→D, Φ120 cutting
X110 Z-30
X100 A→B, Φ60 cutting,
X90 divided 6 times,
X80 each time feed in 10 mm
X70
X60
G0 X120 Z-30
G90 X120 Z-44 R-7.5 F150
Z-56 R-15 B→C, cone cutting
Z-68 R-22.5 divided four times
Z-80 R-30
M30