49
This cycle is almost the same as G85. The difference is that this cycle can be executed to pause at the hole
bottom.
When the G89 and M code are specified in the same block, the positioning operation is performed while the
M code, and then the next drilling operation. When specifying the number of repetitions K, M code is executed
only at the first hole, after no M code is executed.
When the tool length compensation in a fixed cycle block (G43, G44, G49) , positioning to point R bias.
Before using the G89 boring cycle, you must specify the spindle by M code.
P for the hole bottom dwell time, in milliseconds, can only be a multiple of 100.
NOTE
：
1.
The tool radius compensation: When using a fixed cycle command, the tool radius compensation is
ignored.
2.
Cancel canned cycle: You cannot use the G85 and 01 group G code in the same block, or G85 is
canceled.
3.
cycle parameters: After the execution of a complete drilling cycles, the next block specified individually
when a new cycle parameters (Z, R), a new cycle parameters could not be effective; when the follow-up program
is also specified data and new holes loop parameters (Z, R), a new cycle parameters take effect immediately, and
the modal in the following blocks.
Program Example:
G0 G90 G54 X50. Y160. Z30. S200
M3
Fast positioning to the first hole, the spindle is
rotated.
G98 G89 X50. Y160. Z-10. F100. R3.
P1000
Executive Boring cycle, boring a hole first, in the
initial position orientation, offset 3mm, Z stop one
second, and then return to the initial plane.
X-50.
Boring the holes 2, then return to the initial plane
Y-160.
Boring the holes 3, then return to the initial plane
X50.
Boring the holes 4, then return to the initial plane
G80
Fixed cycle canceled.
M30
End of program
13.4 Tapping Cycle
13.4.1 Left-handed Tapping Cycle (G74)
The left-handed tapping cycle execution, when it reaches the bottom of the hole, the spindle rotates
clockwise.
Format:
G74 X_ Y_ Z_ R_ P_ F_ K_
；
X_ Y_
：
Hole data
Z_
：
Absolute coordinate of the hole bottom (absolute value)
From the R point to the bottom of the hole distance (incremental mode)
R_: absolute coordinates of point R (absolute value)
Distance (incremental mode) from an initial position to point R
P_: Dwell time
F_: Cutting feed rate
K_: repetitions
