NCT Group 99M, 2000M manual 127

		16 Automatic Geometric Calculations
G17 G41 (G42)	G18 G41 (G42)	G19 G41 (G42)
N1 G1 ,A or	N1 G1,A or	N1 G1 ,A or
X1 Y1	X1 Z1		Y1 Z1
N2 G2 (G3) G90 X2 Y2 I	N2 G2 (G3) G90 X2 Z2 I	N2 G2 (G3) G90 Y2 Z2 J
J R Q	K R Q	K R Q

Fig. 16.3.2-1

Fig. 16.3.2-2

The intersection is always calculated in the plane selected by G17, G18, G19. The first block (N1) is specified either by means of its angle (,A), in this case a straight line is drawn from the start point to the intersection point in the appropriate angle, or an optional point other than the start point of the straight line is given (X1, Y1; X1, Z1; or Y1, Z1). In this case the intersection is calculated with the straight line lying on both points. Coordinates given in the second block (N2) also I, J, K coordinates defining the center of the arc, are always interpreted by the control as absolute data (G90). Of the two resulting intersections the one to be calculated by the control can be specified at address Q.

If the address value is less than zero (Q<0) the nearer intersection in direction of the straight line is calculated, while if the address value is greater than zero (Q>0) the farther one in direction of the straight line is calculated. The direction of movement along the straight line is determined by the angle.

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