Fagor CNC 8070, Programming Manual

Page: 63 / 556

3
29
CNC 8070
(S
OFT
V02.0
X
)
COORDINATE SYSTEM
3.1 Plane selection (G17/G18/G19/G20)
Selecting the planes determines which axes form the work plane/
trihedron and which axis will correspond to the tool's longitudinal axis.
Plane selection is required to execute operations like:
• Circular and helical interpolations.
• Corner chamfering and rounding.
• Tangential entries and exits.
• Machining canned cycles.
• Tool radius and length compensation.
These operations, except tool length compensation, can only be
executed in the active work plane. Tool length compensation, on the
other hand, can only be applied on the longitudinal axis.
Programming
The work planes may be selected by program using these functions:
G17 Main plane X-Y; longitudinal axis and perpendicular Z.
G18 Main plane Z-X, longitudinal axis and perpendicular Y.
G19 Main plane Y-Z, longitudinal axis and perpendicular X.
G20 Work plane/trihedron and longitudinal axis.
And using the instruction:
#TOOL AXLongitudinal axis selection.
Considerations about functions G17, G18 and G19 and the
channels
When in these functions we mention the X, Y and Z axes, it does not
mean that the axes must have these names; it is a convention to refer
to the first three axes of the channel.