14 The Tool Compensation

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

Fig. 14.5.2-4

Special instances of offset mode:

If zero displacement is programmed (or such is obtained) in the selected plane in a block in offset mode, a perpendicular vector will be positioned to the end point of the previous interpolation, the length of the vector will be equal to the radius compensation. Instances of this kind should be handled with caution because of the hazards of inadvertent undercutting or distortions (in the case of a circle).

For example:

...G91 G17 G42...

N110 G1 X40 Y50

N120 X0

N130 X90

N140 X50 Y-20

...

Fig. 14.5.2-5

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Image 93
NCT Group 99M, 2000M manual G91 G17 G42 N110 G1 X40 Y50 N120 N130 N140 X50 Y-20