1. G Function Description
1.2.42 G87: FINE BORING CYCLE OF BACK SIDE
Command form:
G87 X Y Z R Q P F K ；
X_ or Y_: hole position data (absolute/increment position)
Z_:
G91: the distance from the bottom of the hole to point Z (directional)
G90: program position of point Z
R_:
G91: the distance from initial level to R point level (directional)
G90: program position of point R
Q_: shift amount at the bottom of the hole (positive, negative will be
ignored)
P_: dwell time at the bottom of the hole (s)
F_: feedrate
K_: number of repeats (repeat moving and drilling, G91 is effective)
X, Y, Z, R is absolute or increment mode, decided by G90/G91
PIC:
G98, G99
OSS
Initial point
Drill Start
OSS
Dwell P(s)
Z point
Drill Start q
R point
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