36
Q_
：
The cutting depth of cutting feed at each time
F_
：
Cut feed speed
K_
：
Times of repetition
Fig. 13-4
High-speed chip drilling cycle along Z axis to perform intermittent feeding. When using the cycle, while
processing the blade clearance, return amount can be set by parameter 0609 to realize high efficient drilling.
Q means cutting depth for each of the cutting feed, must be specified as positive, if Q is specified as a
negative value, symbols will be ignored.
When G73 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 drill hole. When specified repetitions K, only in the
first hole M code, the hole does not perform M code later.
In a fixed loop program period specified in the tool length offset (G43 G44 G49), while positioning to the R
point, offset is required.
Before using G73 drilling cycle, it is necessary to specify the spindle rotation by M code.
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 G73 and 01 group G code,
otherwise G73 is cancelled.
3.
Loop parameters: after the complete drilling cycle instruction, follow-up procedures section separately
specify the new cycle parameters (Z, R, Q), 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), a new cycle
parameters take effect immediately, and in the subsequent program segment modal effect.
Program example:
M3 S2000
；
FWD
G90 G99 G73 X300. Y-250. Z-150.
R-100. Q15. F120
；
Positioning, drill hole 1, then return to the R point
Y-550
；
Positioning, drill hole 2, then return to the R point