
14. TOOL COMPENSATION FUNCTION
B–63832EN/01
NC FUNCTION
158
With this function, the programmed tool path can be offset when actually
machining, for value of the tool radius set in the CNC.
By programming machining pattern using this function (measuring cutter
radius for actual cutting, and setting the value in the CNC as offset value),
the tool can machine the programmed pattern, via the offset path. There
is not need to change the program even when tool radius changes; just
change the offset value.
Work-
piece
Profile
Tool
nose
Tool center path
Cross points of line and line, arc and arc, line and arc is automatically
calculated in the CNC to obtain offset actual tool path. So, Programming
becomes simple, because it is only necessary to program the machining
pattern.
G40 : Tool nose radius compensation cancel
G41 : Tool nose radius compensation left
G42 : Tool nose radius compensation right
G41 and G42 are commands for tool nose radius compensation mode.
The tool is offset to the left forward in the tool movement in G42 and right
forward in G42. Tool nose radius compensation is cancelled with G40.
Workpiece
G42
G41
X
Z
14.2
TOOL NOSE RADIUS
COMPENSATION
(G40, G41, G42)
(T series)
T series
Explanations
D Tool nose radius
compensation and its
cancellation (G40, G41,
G42)