35
Fig. 13-3
13.3 Cycle Mode of Hole Machining
General format of hole machining instruction is as follows:
G73
～
G89 X
＿
Y
＿
Z
＿
R
＿
Q
＿
P
＿
F
＿
K
＿；
X
＿
Y
＿
Plane anchor point coordinates, you can use absolute value, increment value can also be used
；
Z
Specify the location of the flat bottom of the hole, you can use absolute value, increment value can also
be used
；
R Specify the location of the "R" the plane, you can use absolute value, increment value can also be used
；
Q
In the way of G73 or G83 used to specify each processing depth, displacement in G76 or G87
regulations. Q value shall take incremental value, and has nothing to do with G91 G90 and choice
；
P Used to specify the tool at the hole bottom pause time, as specified in the G04 P units of time, namely in
ms, do not use the decimal point
；
F Specify the hole processing cutting feed speed. The instructions for the modal, even cancelled fixed cycle
is still valid in the subsequent processing
；
K
The number of repeat instructions hole processing, when this parameter is ignored as L1, if choose the
way G90 in program, the position of the tool in the original hole repeated processing. If choose G91, use a
program that can be done in a straight line on a number of equidistance hole processing. L is only valid in the
order of application.
Cancel the hole machining with G80 processing way, and if there is any intermediate 01 group G code, hole
processing mode will be automatically cancelled, so use G01, G00, G02, G03 can cancel fixed cycle, its effect is
the same as G80.
13.3.1 High-speed Chip Drilling Cycle (G73)
Instruction format
：
G73 X_ Y_ Z_ R_ Q_ 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
）
(Return to initial level)
(Return to point R level)
