38
Spindle to carry on the fine boring cycle, when arrived at the bottom of the hole, the spindle must stop, and
move in the opposite direction to the tip of the blade. This ensures that the processing surface is not damaged, has
realized the boring machining precision effectively.
When G76 code section of the middle finger in the same program timing and M code, the positioning action
of M code execution at the same time, and then go to the next boring movement. When specified repetitions K,
only in the first hole M code, the hole does not perform M code later.
When in a fixed loop program period specified in the tool length offset (G43 G44 G49), while positioning to
the "R" and offset.
Before use G76 boring cycle, must through the M code specified spindle rotation.
P to pause time, at the bottom of the bore milliseconds, only as a multiple of 100.
WARNING:
Q (offset) at the bottom of the bore is the modal value, must be careful to specify, because it
also applies to G73 and G83.
CAUTION:
1.
The tool radius compensation: in the use of a fixed cycle instructions, tool radius compensation is
ignored.
2.
Cancel the fixed cycle: cannot be used in the same program segment G76 and 01 group G code,
otherwise G76 is cancelled.
3.
Loop parameters: after the complete drilling cycle instruction, follow-up procedures section separately
specify the new cycle parameters (Z, R, Q, P), a new cycle parameters cannot be effective; When the follow-up
process at the same time the number of the specified data and a new cycle parameters (Z, R, Q, P), a new cycle
parameters take effect immediately, and in the subsequent program segment modal effect.
Program example:
G0
G90
G54
X50.
Y160.
Z30.
S1000 M3
Rapid positioning to 1 hole, spindle begin to spin.
G98
G76
X50. Y160.
Z-10.
F30.
R3. P1000 Q5.
Execution cycle, boring hole 1, directed at the bottom
of the bore, move 5 mm, and then return to the initial
plane.
X-50.
The second boring, and then return to the initial plane
Y-160.
The third boring, and then return to the initial plane
X50.
The fourth boring, and then return to the initial plane
G80
Cancel fixed cycle
M30
Program end
13.3.3 Ordinary Drilling Cycle (G81)
Instruction format
：
G81 X_ Y_ Z_ R_ F_ K_
；
X_ Y_
：
Location data
Z_
：
Absolute coordinates of the bottom of the hole
（
absolute value method
）
The distance from R point to the bottom of the hole
（
incremental value method
）
R_
：
Absolute coordinates of the bottom of the R point
（
absolute value method
）
The distance from the initial position to the R point
（
incremental value method
）
