CNC Z32 - Programming Guide (LATHES)
G0 X45 Z-103
G905 X40 NZ-103 Z5 K3 E100 J3 NS5 NF1
.....
Thread 3
......
G0 X20 Z-53
G905 X24 NZ-53 Z5 K3 E200 J2.5 NS7 NF1
......
Thread 4
......
G0 X-20 Z5
G905 X-24 NZ5 Z-53 K3 E200 J2.5 NS7 NF1
......
6. Taper threading
It is possible to execute both external and internal taper threadings.
The X parameter is referred to the nominal diameter, corresponding to the NZ value.
The NG parameter is computed with the formula:
100
1
2
⋅
∆
⋅
−
=
Z
Xiniziale
Xfinale
NG
Where:
Xiniziale
is the initial nominal diameter
Xfinale
is the final nominal diameter
∆
Z
is the length (always positive) of the Z segment going from Xiniziale to Xfinale
The NG sign is determined by the rule: NG positive if the X increases during the machine.
The final segment is connected as per the cylindrical threadings.
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