NCT Group 2000M, 99M manual Tool Compensation

14 The Tool Compensation

When a full circle is being programmed, it may often occur that the path of tool covers more than a complete revolution round the circle in offset mode.

For example, this may occur in programming a direction reversal along the contours:

...G17 G42 G91...

N110 G1 X30 Y-40

N120 G41 G2 J-40

N130 G42 G1 X30 Y40

...

The tool center covers a full arc of a circle from point P1 to point P1 and another one from point P1 to point P2.

Fig. 14.5.7-13

When offset mode is canceled by programming I, J, K, a similar condition will emerge:

...G17 G90 G41...

N090 G1 X30

N100 G2 J-60

N110 G40 G1 X120 Y180 I-60 J-60

...

The tool center covers a full arc of a circle from point P1 to point P1 and another one from point P1 to point P2.

Fig. 14.5.7-14

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