5238-E P-156
SECTION 7 FIXED CYCLES
8-16. Repeat Function
When cutting equally spaced holes, the use of the repeat function simplifies programming
LE33013R0300900460001
The repeat function allows repeated designation in two blocks.
Note that the repeat function is effective for G178, G179 and G181 through G184 and G189, G190
cycles.
• When no Q word is specified or Q
0
is specified, the control regards the designation as "Q
1
".
• The fixed cycle command associated with the Q word is effective only in one block. Be sure to
specify G180 in the block following such a block.
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• When a Q command is specified, positioning in intervals of 360/Q is executed automatically
from the commanded C position.
8-17. Tool Relieving Command in Deep-hole Drilling Cycle for Chip Dis-
charge.
As explained before, in deep-hole drilling cycle (G183), the use of D and E codes executes step
feed and breaks the chips in which the drill will otherwise tend to get entangled. In addition to this, it
is possible to program drilling with discharge of chips outside the hole being drilled.
To execute a drilling with chip discharge command in a fixed cycle program, program a block of
commands like that shown below.
LE33013R0300900470001
L: Infeed amount (as a diameter ) for tool relieving motion
When an L** command is programmed in a deep-hole drilling cycle, peck feeding is repeated
until the total infeed amount reaches "L" and then the drill returns to the cycle start point at
the rapid traverse. The drill is then positioned to a point -α mm (*) away from (above) the
depth of the previous cut at the rapid traverse rate; the programmed drilling cycles is
repeated until the commanded X (Z) value is reached.
The value set at Pecking amount in drilling cycle of optional parameter (MULTIPLE
MACHINING) is used for "α".
Specify the number of holes
to be drilled.
G183
G180
X40 Z80 C0 I46 D10 E1 F40 Q6
G181
G180
X100
X80
C90
Z150 C30 I46 E1 Q4
:The commands in this block cannot be given.
*
*
G183 X40 Z80 C0 146 D10 E1 F40 L50
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