NCT Group 2000M, 99M manual G17 G91 N110 G41 G0 X50 Y70 D1 N120 G1 Z-40 N130 Y40

14 The Tool Compensation

If no cut is feasible in direction Z unless the radius compensation is set up, the following procedure may be adopted:

...G17 G91...

N110 G41 G0 X50 Y70 D1

N120 G1 Z-40

N130 Y40

...

Now the tool will have a correct path as is shown in the Figure.

Fig. 14.5.7-3

If, however, movement in direction Z is broken up into two sections (rapid traverse and feed), the path will be distorted because of the two consecutive interpolations outside of the selected plane:

...G17 G91...

N110 G41 G0 X50 Y70 D1

N120 Z-35

N130 G1 Z-5

N140 Y40

...

Fig. 14.5.7-4

As a trade-off, insert a small movement in direction Y between two ones in direction Z:

...G17 G91...

N110 G41 G0 X50 Y69 D1

N120 Z-35

N130 Y1

N140 G1 Z-5

N150 Y40

...

With the above "trick" a correct compensation vector can be got.

Fig. 14.5.7-5

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