G73: Peck Drilling Cycle
This cycle performs high-speed and stepped drilling operations. It gradually descends to the bottom of the hole to evacuate the chips.
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Format: |
G73 X_ Y_ Z_ R_ Q_ F_ K_ |
X: Hole position X-axis coordinate
Y: Hole position Y-axis coordinate
Z: Hole bottom coordinate
R: Safe Z coordinate to descend rapidly
Q: The distance to be drilled in each cutting movement
F: Cutting feedrate
K: Number of repetitions
The retract amount can be adjusted using the PRM312 parameter. After the tool operation is completed, a rapid retract is performed. Before issuing the G73 command, the spindle rotation should be activated with an M code. The M code given in the same line as the G73 command is processed once during the first positioning. However, the drilling operation proceeds without waiting for the completion of the M code. When multiple holes are drilled with the same command, the M code given in the same line as the G73 command is only executed once during the first operation.
In order to perform the drilling operation, one of the axes such as X, Y, Z, R, or other axes must be specified in the command.
When programming the G73 code, the R and Q values must be specified in the first line of consecutive G73 commands. In the subsequent drilling lines, these values are not mandatory.
The G73 code cannot be executed while the tool radius compensation is active. Use G40 to cancel the tool radius compensation before using the G73 code. Tool length compensation commands can be used with the G73 code.
Canned cycle commands should not be programmed on the same line as Group 1 G-codes (G0, G1, G2, G3). If they are, the canned cycle commands will be canceled.
Example:
M3 S2000 (SPINDLE CW ROTATION)
(DRILL A HOLE AT X100 Y-250.)
(RETURN TO THE R POINT AFTER COMPLETING THE DRILLING OPERATION)
G90 G99 G73 X100. Y-250. Z-80. R10. Q30. F120.
X200. (2ND DRILLING OPERATION)
Y0. (3RD DRILLING OPERATION)
X100. (4TH DRILLING OPERATION)
G98 Y250. (5TH DRILLING OPERATION)
G80 G53 Z0. ( GO TO Z AXIS REFERENCE)
M5 (SPINDLE STOP)