3 G/M Codes
3 - 53
5. Face Cut-Off Cycle, G74
Functions and Purposes:
G74 command automatically performs a fixed loop at the end of the workpiece via
commands such as coordingate of groove end, cutting depth, tool retract depth etc.
Format:
G74 R(e)___
G74 X(U)___ Z(W)___ P i___ Q k___ R d___ F___
R(e) Amount the tool move backward when after Z cutting k
X Absolute positioning command on X-axis
Z Absolute positioning command on Z-axis
U Incremental positioning command on X-axis
W Incremental coordinates on Z-axis
P i Amount the each movement of X canned cycle.
Q k Z cutting of the each segment
R d Amount the tool move backward when X end of cutting
F Cutting speed feed-rate
(1) Input of a Z or W parameter is a must
(2) IF R (e) tool extraction parameter is not given, tool extraction depth shall be set
using the setting of parameter G74 or G75.
(3) Total cutting distance must be greater than respective cutting distances.
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