NCT Group 99M, 2000M manual G91 G17 G42 N100 G1 X50 Y60 N110 G40 X70 Y-60 I100 J-20

14 The Tool Compensation

Going around the outside of a corner at an acute angle, 0°#"<90°

Fig. 14.5.3-3

Special instances of canceling offset mode:

If values are assigned to I, J, K in the compensation cancel block (G40) - but only to those in the selected plane (e.g., to I, J in the case of G17) - the control will move to the intersection point between the previous interpolation and the straight line defined by I, J, K. The values of I, J, K are always incremental, the vector defined by them points away from the end point of the previous interpolation.

This facility is useful, e.g., for moving from an inside corner.

...

...G91 G17 G42...

N100 G1 X50 Y60

N110 G40 X70 Y-60 I100 J-20

...

Fig. 14.5.3-4

In this case the control will always compute a point of intersection regardless of whether an inside or an outside corner is to be machined.

Fig. 14.5.3-5

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