NCT Group 99M, 2000M manual Circular-circular Intersection

16 Automatic Geometric Calculations

16.3.4 Circular-circular Intersection

If two successive circular blocks are specified so that the end point, the center coordinates as well as the radius of the second block are given, i.e., it is determined over the control calculates intersection between the two circles. The calculated intersection is the end point of the first block, as well as the start point of the second one.

G17 G41 (G42)	G18 G41 (G42)	G19 G41 (G42)
N1 G2 (G3) X1 Y1 I1 J1	N1 G2 (G3) X1 Z1 I1 K1	N1 G2 (G3) Y1 Z1 J1 K1
or X1 Y1 R1	or X1 Z1 R1	or Y1 Z1 R1
N2 G2 (G3) G90 X2 Y2	N2 G2 (G3) G90 X2 Z2 I2	N2 G2 (G3) G90 Y2 Z2 J2
I2 J2 R2 Q	K2 R2 Q	K2 R2 Q

Fig. 16.3.4-1

Fig. 16.3.4-2

The intersection is always calculated in the plane selected by G17, G18, G19. The first block (N1) is specified either with the center coordinates (I1 J1; I1 K1; J1 K1) or with the radius (R1) of the circle. In this block the interpretation of center coordinates corresponds to the default circle specification, i.e., it is the relative distance from the start point. The coordinates given in the second block (N2), as

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