·162·
Programming manual
CNC 8055
CNC 8055i
9.
CANNED CYCLES
·M· & ·EN· MODELS
SOFT: V02.2X
G81. Drilling canned cycle
9.7 G81. Drilling canned cycle
This cycle drills at the point indicated until the final programmed coordinate is reached. It is possible
to program a dwell at the bottom of the drill hole.
Working in Cartesian coordinates, the basic structure of the block is as follows:
G81 G98/G99 X Y Z I K
[ G98/G99 ] Withdrawal plane
G98 The tool withdraws to the Initial Plane, once the hole has been drilled.
G99 The tool withdraws to the Reference Plane, once the hole has been drilled.
[ X/Y±5.5 ] Machining coordinates
These are optional and define the movement of the axes of the main plane to position the tool at
the machining point.
This point can be programmed in Cartesian coordinates or in polar coordinates, and the coordinates
may be absolute or incremental, according to whether the machine is operating in G90 or G91.
[ Z±5.5 ] Reference plane
Defines the reference plane coordinate. It can be programmed in absolute coordinates or
incremental coordinates, in which case it will be referred to the initial plane.
If not programmed, it assumes as reference plane the current position of the tool.
[ I±5.5 ] Drilling depth.
Defines the total drilling depth. It can be programmed in absolute coordinates or incremental
coordinates and in this case will be referred to the reference plane.
[ K5 ] Dwell
Defines the dwell, in hundredths of a second, after each drilling peck until the withdrawal begins.
If not programmed, the CNC will take the value of "K0".
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