NCT Group 2000M, 99M manual Let us see an example

16 Automatic Geometric Calculations

Let us see an example:

Fig. 16.3.3-3

Fig. 16.3.3-4

%O9983

%O9984

N10

G17

G0

X90

Y0

M3 S200

N10

G17

G0

X90

Y0

M3 S200

N20

G42

G1

X50

D0

N20

G42

G1

X50

D0

N30

G3

X-50

Y0

R50

N30

G3

X-50

Y0

R50

N40

G1

X-50

Y42.857 ,A171.87 Q-1

N40

G1

X-50

Y42.857 ,A171.87 Q1

N50

G40

G0

Y70

N50

G40

G0

Y70

N60

X90

N60

X90

N70

M30

N70

M30

%

%

Linear block N40 is defined over because both the end point coordinates (X–50 Y42.875) and the angle (,A171.87) of the straight line are specified. Therefore X–50 Y0 coordinates of the circle programmed in the previous block N30 are not referred to as end point coordinates, but only as a point which is intersected by the circle and the end point is the calculated intersection. In program No. O9983 the nearer intersection in the direction of the straight line is given (Q–1), while in O9984 the farther one is specified (Q1).

Circular-linear intersection calculation can also be combined with a chamfer or rounding specification. E.g.:

%O9983

N10 G17 G0 X90 Y0 M3 S200

N20 G42 G1 X50 D0

N30 G3 X-50 Y0 R50 ,R15

N40 G1 X-50 Y42.857 ,A171.87 Q-1 N50 G40 G0 Y70

N60 X90

N70 M30

%

In the example a 15mm-rounding is programmed in block N30 (,R15). The control calculates the intersection of blocks N30 and N40 and inserts the programmed rounding to the resulting contour.

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