39
F_
：
Cut feed speed
K_
：
Times of repetition
Fig. 13-6
Along the X axis and Y axis positioning, fast moving to R point, from R to Z to perform drilling, and fast
moving back.
When G81 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 drilling 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 using G81 drilling cycle, must through the M code specified spindle rotation.
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 G81 and 01 group G code,
otherwise G81 is cancelled.
3.
Loop parameters: after the complete drilling cycle instruction, follow-up procedures section separately
specify the new cycle parameters (Z, R), 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), a new cycle parameters take
effect immediately, and in the subsequent program segment modal effect.
Program example:
G00
G90
G54
X50.
Y160.
Z30.
S1000
M03
Rapid positioning to hole 1, spindle begin to spin.
G98 G81 X50. Y160. Z-10. F30. R3.
Perform drilling cycle, drill hole 1, then return to the initial plane.