Wuhan Huazhong Numerical Control Co., Ltd HNC-18iT v4.0 Programming Manual page 94

� � � �
Taper Taper Taper Taper Face Face Face Face Cutting Cutting Cutting Cutting Cycle
Programming Programming Programming Programming
G81 X(U)_ Z(W)_ K_ F_
Explanation Explanation Explanation of of of of the 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
K The distance on Z axis of the starting point (point B) with reference to the end
point (point C). It is negative, if the value of point C on Z axis is more than point B's. It is
positive, if the value of point C on Z axis is less than point B's.
F Feedrate
+X
Function Function
Function Function
This command can implement the taper face cutting. The machining path is
A→B→C→D→A.
Cycle Cycle Cycle
parameters parameters
parameters
B
k
z
Rapid traverse speed
Feedrate
Figure 9.7 Taper Face Cutting Cycle (G81)
9. Functions to Simplify Programming
w
1R
A
4R
2F
3F
D
C
A: Initial point
B: Starting point of cutting
C: End point of cutting
D: Retraction point
90
u/2
x/2
+Z