GSK 988T, User Manual

Page: 85 / 416

Chapter
Ⅱ
G Commands
71
Ⅰ
Programming
G71 P80 Q120 U0.5 W0.2
； （
roughing a---e
，
X machining allowance 0.5mm , Z 0.2mm
）
N80 G00 X40 S1200
； （
Positioning
）
G01 Z-30 F100
； （
a → b
）
X60 W-30
； （
b → c
）
a → b → c → d → e blocks for finishing path
W-20
； （
c → d
）
N120 X100 W-10
； （
d → e
）
G70 P80 Q120
； （
a---e blocks for finishing path
）
M30 ； （ End of block ）
G71 supports continuous grooving machining:
Direction of the shape in the 2
nd
axis of the level (X axis in ZX level) is not necessary to
monotonous rise or fall, and there may be up to 10 groovings, which is shown below:
Fig. 2-39
But, external contour along Z must mononously rise or fall, and the following contour cannot be
machined:
Fig. 2-40
The first tool must be vertical: the machining can be executed when the shape along Z changes
mononously, which is shown below:
Fig. 2-41
The tool retraction should be executed after turning, and the retraction amount is
specified by R (e) or No 5133, which is shown below:
Monontone change is not observed
along the Z axis