上海维宏电子科技股份有限公司
Weihong Electronic Technology Co., Ltd.
Specialized, Concentrated, Focused 29
Z_: the position of point Z in the hole bottom plane (absolute programming); the distance from
point R to point Z in the hole bottom plane (incremental programming)
R_: the position of point R (absolute programming); the distance from the initial point to point R
(incremental programming)
Q_: the cutting depth each time (incremental and positive)
P_: the dwell time at bottom of hole, in ms, with no decimal point
F_: feed speed; even if the canned cycle is cancelled, this modal data is still effective in the
subsequent machining.
K_: number of repeats, with default as K1. K (a non-modal command) is only effective in the
block containing it. Under G91 mode, with setting this parameter, one block can implement the
machining of several isometric holes distributed in one straight line. Under G90 mode, this parameter
can specify the repeated machining times on the same position.
Command of hole machining mode, and Z, R, Q, and P, are all modal. They will remain in effect
until hole machining mode is cancelled. Therefore, these commands can be specified at the
beginning of the program, and then it is unnecessary to specify them again in the following
consecutive machining; if the data of a certain hole is changed (such as: hole depth), you only need to
modify this data.
G80 command is used to cancel hole machining mode; if any G code of Group 01
(G00/G01/G02/G03…) appears in the program block, the hole machining mode will also be
automatically cancelled. In other words, as for canceling a canned cycle, G80 and G code of Group
01 function the same.
Canned Cycle Commands
Followings are the detailed description of various hole-machining modes.
G73 High Speed Chipbreaking Drilling Cycle
Command Format:
G73 X_Y_Z_R_Q_ F_ K_;
Description:
X_Y_: hole position data (absolute/incremental coordinate)
Z_: the position of point Z in the hole bottom plane (absolute programming); the distance from
point R to point Z at the bottom of hole (incremental programming)
R_: the position of point R (absolute programming); the distance from the initial point to point R
(incremental programming)
Q_: the cutting depth each time (incremental and positive, minus sign will be ignored)
F_: feed rate, even if the canned cycle is cancelled, this modal data is still effective in the
subsequent machining.
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