Okuma OSP-P200L Programming Manual page 87

Straight line to arc cutting (arc to straight line cutting)
•
Arc within one quadrant
In a program where the cutting tool moves continuously from a straight line to an arc, the
movement of the cutting tool is handled in the same way as in a case where the movement is
from a straight line to a straight line.
N4
X+
N1 G42 G01
N2
N3 G03
N4 G01
The tool position at point N2 is determined so that the tool nose R comes into contact with both
line N1 - N2 and arc N2 - N3. At point N3, the cutting tool is positioned in a similar way - the tool
nose R makes contact at point N3.
When the cutting tool moves from point N3 to point N4, the cutting mode changes from circular
interpolation to linear interpolation. If discontinuity at point N3 results during the tool path
calculation, an alarm is displayed and machine operation is stopped.
N3
Z+
X100 Z100 F0.2 S1000
Z80
K − 20
X140 Z60
Z40
SECTION 6 OFFSET FUNCTION
N2
T010101 M04
5238-E P-74
N1
LE33013R0300800100016