d. During executing the fixed cycle (e.g. G76, G84, etc.) that contains spindle control, the spindle hasn't
reached the specified rotation when the tool starts cutting feeding. In this case, it is required to insert G04
pause instruction during the hole processing operation.
e. G code of group 01 also has the effect to cancel fixed cycle, and thus do not write fixed cycle
instruction and G code of group 01 in the same segment.
f. If the segment that executes the fixed cycle specifies an M code, the M code will be executed while the
fixed cycle is positioning, and the signal that M instruction is executed is sent when Z axis returns to point R
or the start point. If the fixed cycle is repeated with K parameter instruction, the M code in the same segment
will be executed when the fixed cycle is first executed.
g. In fixed cycle mode, tool offset instructions G45~G48 will be ignored (won't be executed).
h. When single segment switch is in up position, the fixed cycle will stop after executes X, Y axis
positioning, quickly feeds to point R and returns from the hole bottom (to point R or the start point). That is to
say, it is required to press the cycle start button for three times to complete a hole processing. During the three
stops, the first two stops are in feeding state, and the last one is in stopped state.
i. While executing G74 and G84 cycles, if you press the retain button when Z axis moves to point R to
point Z or reverse, the feeding retaining indicator will be lighted immediately, but the machine tool action
won't stop immediately, until Z axis returns to point R. In addition, feeding rate switch is invalid in G74 and
G84 cycles, and it is fixed at 100%.
Examples of using tool length compensation and fixed cycle
Reference point
ADTECH9 Series CNC Programming Manual
Drill hole Ø 10
Drill hole Ø 20
Drill hole Ø 95 (deep 50MM)
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