NCT Group 2000M, 99M manual 14.5.6

14 The Tool Compensation

The start and end points of the arc will be given by a tool-radius long vector perpendicular to the end point of the path of previous interpolation and by a tool-radius vector perpendicular to the start point of the next one, respectively. G39 has to be programmed in a separate block:

...G17 G91 G41...

N110 G1 X100

N120 G39

N130 G3 X80 Y-80 I80

...

Fig. 14.5.6-1

When I, J or K is programmed in block G39, the end point of the circular arc will be given by a tool-radius long vector perpendicular to the vector defined by I, J or K from the end point of the previous interpolation, in accordance with the selected plane.

...G17 G91 G41...
N110	G1 X100
N120	G39	I50 J-60
N130	G40	X110 Y30
			Fig.	14.5.6	-2
...

The previously selected mirroring or rotating commands are effectual the vector defined by I, J or K. As a matter of fact, the scaling command will not affect the direction. No movement command can be programmed in a block of G39 type. The control will return error message 3036 G39 CODE IN G40 if command G39 is issued in state G40 or 3D compensation mode.

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