ISO canned cycles (T)
93
Function MDVMeaning
G87
* Face threading canned cycle.
G87 X Z Q R [K] I B [E] [D] L C [J] [A] [W]
[V] [M] [H] [U] N
X: X coordinate of the thread's starting point
Z: Z coordinate of the thread's starting point
Q: X coordinate of the thread's end point
R: Z coordinate of the thread's end point
K: Z coordinate of the point where the thread is
measured; It is used with parameter W for
thread repair
I: Thread depth
I>0: machined in the negative direction of the
Z axis
I<0: machined in the positive direction of the
Z axis
B: Depth of the passes
B<0: Constant pitch increment
B>0: Decreasing pitch increment
E: Minimum value that the penetration pass can
reach when B>0
D: Safety distance along Z
L: Finishing stock
C: Thread pitch
C>0: Pitch according to the taper.
C<0: Pitch according to the associated axis
J: Exit from the thread. X distance from the final
point (R, Q) to the point where the withdrawal
from the thread begins (in radius)
A: Tool penetration angle according to the Z axis.
A=0: Axial penetration
A<0: Penetration in zigzag
If not programmed, a value of 30º is assumed
W:Angular position of the thread starting point.
Its meaning depends on K.
K not programmed: indicates the spindle
angular position of the thread's starting point
K programmed: indicates the angular spindle
position corresponding to the thread
measuring point (thread repair)
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