Wuhan Huazhong Numerical Control Co., Ltd HNC-18iT v4.0 Programming Manual page 97

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Taper Taper Taper Taper Thread Thread Thread Thread Cutting
Programming Programming Programming Programming
G82 X(U)_ Z(W)_ I_ R_ E_ C_ P_ F(J)_
Explanation Explanation of of of of the Explanation the the
Explanation the parameters
X, Z Coordinate values of end point (point C) in absolute command
U, W Coordinate values of end point (point C) with reference to the initial point (point A)
in incremental command
I The radius difference between starting point B and end point C. It is negative, if
the radius of point B is less than the radius of point C. Otherwise, it is positive.
R, E Coordinate value of retraction amount with reference to the end point (point C) in
incremental command.
C The number of thread head. It is single thread when C is 0 or 1.
P Start point offset. It is used for multiple threads.
F Thread lead per revolution
J Thread lead in inch measurement
+X
F F F F unction unction unction
unction
This command can implement the taper thread cutting. The machining path is
A→B→C→D→A.
Cutting Cutting Cycle Cutting Cycle Cycle Cycle
parameters parameters
parameters
z
D
3R
e
x/2
r
Figure 9.10 Taper Thread Cutting Cycle (G82)
9. Functions to Simplify Programming
w
4R
C
2F
L
93
A
u/2
1R
i
B
+Z