CNC Z32 - Programming Guide (LATHES)
Examples:
Z
X
5
-100
-50
X60
X40
X30
X80
1
2
1) External threading with initial diameter X=60, final diameter X=80 and Z starting and end coordinates,
respectively, NZ=5 and Z= -100. Executes the thread starting from the smaller diameter to the larger diameter. In
this case the positive percentage taper is equal to:
524
.
9
100
105
1
2
60
80
=
⋅
⋅
−
=
NG
Therefore, the programming becomes:
G0 X60 Z10
G905 X60 NZ5 Z-100 NG9.524 E100 J2.5 NS7 NF1 K1.25
2) Internal threading with initial diameter X=30, final diameter X=40 and Z starting and end coordinates,
respectively, NZ=-50 and Z= 5. Executes the thread starting from the larger diameter to the smaller diameter. In
this case the positive percentage taper is equal to:
091
.
9
100
55
1
2
30
40
=
⋅
⋅
−
=
NG
Therefore, the programming becomes:
G0 X25 Z-50
G905 X30 NZ-50 Z5 NG9.091 E200 J2.5 NS7 NF1 K1.25
6.6.4
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