Okuma OSP-P200L Programming Manual page 80

1-8-3. Behavior in Tool Nose Radius Compensation Mode
The tool nose radius compensation function provides the means to automatically compensate for
the tool nose radius in continuous cutting.
Since such compensation is performed automatically, there are some restrictions in programming
when the tool nose radius compensation function is used.
Straight line to straight line cutting
•
Midpoint on a straight line
When specifying a midpoint on a straight line, the point should be commanded carefully.
When point N2 in the figure below is located on line N1 - N3, the cutting tool is positioned so
that the tool tip circle comes into contact with line N1 - N3 at point N2.
•
Returning along a straight line
Such axis movement causes no problem when the program is written without using the tool
nose radius compensation function.
However, when this function is used the axis movements must be programmed carefully.
Program Example:
X+
X+
N1 G42
N2
N3 G41
In this example points N2 and N3 are commanded while the cutting tool is at point N1.
When the cutting tool advances from point N1 to point N2, G42 is designated since the cutting
tool moves on the right side of the workpiece with respect to the direction of tool advance.
However, in the return motion of the tool from point N2 to point N3, the cutting tool is on the left
side of the workpiece with respect to the direction of tool advance. Therefore, G41 is specified
instead of G42.
N3
N2
Z+
Z+
N2
G01 X1 Z1
X2 Z2
X3 Z3
Cutting tool stops at this point in single
block mode of operation
N1
N3 N1
SECTION 6 OFFSET FUNCTION
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5238-E P-67