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GSK928TEa Turning CNC System
User Manual
⑤ Z rapidly retracts to A.
⑥ X≠0: X rapidly offsets the distance E.
⑦ X feeds to C and Z to B by repeating the step 1～4.
⑧ Z rapidly returns to C and X to A.
⑨ The tool still stops the starting point of the cycle when G74 cycle ends.
【Relative parameter】
In G74, the relative parameter of rapid traverse is referred to G00, the cutting feed is referred to G01.
【Note】
1） In G74, the system is not relative to the tool width, the end point X should be the actual
subtracting or adding the tool width(it is determined by the tool infeed direction).
2） I, K, E are no sign. The system executes the operation according to K =I when K is more than I.
3） G74 is in the alone block without other commands.
4） In the end face deep hole machining cycle, E cannot be 0, otherwise, the system appears
E269 alarm; in the deep hole drilling cycle, E can be 0, which is valid.
【Example】
The end face deep hole machining cycle as Fig. 4-34: tool width= 5 mm, tool infeed =6 mm once,
tool retraction= 2 mm, offset= 5 mm once, F=100 mm/min.
Fig. 4-34
end face deep hole machining cycle example（R=0）
N0010 G0 X0 Z40
; position to the tool infeed point；
N0020 G74 X22.5 Z20 I6 K2 E5 F100
; end face machining cycle. The end point of
programming is defined that X end point coordinate adds
the width of tool.
N0030 M30
4.14.5
G75 —Grooving cycle
【Command format】
G75
X（U）_
Z（W）_
I_
K_
E_
F_
；Grooving Cycle
【Field】
X（U）Z（W）—end point coordinate of slot. It is the cutoff cycle when Z coordinate is
omitted.
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