Fagor CNC 8070, Programming Manual, Page: 195 / 556

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Programming manual
CNC 8070
TOOL COM
PENSAT
ION
Tool
r
adi
us
com
p
e
n
sat
ion
9.
(S
OFT
V02.0
X
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161
9.1.2 Beginning of tool radius compensation
Tool radius compensation is selected with these functions:
G41 Left-hand tool radius compensation.
G42 Right-hand tool radius compensation.
After executing one of these functions, radius compensation will be
active for the next movement in the work plane, that must be a linear
movement.
The way radius compensation will begin depends on how it is
activated G138/G139 and on the type of transition G136/G137
selected:
• G139/G136
The tool moves to the perpendicular of the next path contouring the
corner along a circular path.
• G139/G137
The tool moves to the perpendicular of the next path contouring the
corner along linear paths.
• G138
The tool moves directly to the perpendicular of the next path.
Regardless of the type of transition (G136/G137) programmed.
The following tables show the different ways tool compensation may
begin, depending on the selected functions. The programmed path is
shown with solid line and the compensated path with dashed line.
Beginning of the compensation without programmed movement
After activating the compensation, it may occur that the axes of the
plane will not be involved in the first motion block. For example,
because they have not been programmed, or the current tool position
has been programmed or an incremental movement has been
programmed.
In this case, the compensation is applied at the same point where the
tool is, as follows. Depending on the first movement programmed in
the plane, the tool moves perpendicular to the path on its starting
point.
The first movement programmed in the plane may be either linear or
circular.
G41 G42