NCT Group 99M, 2000M manual Three-dimensional Tool Offset G41, G42

14 The Tool Compensation

In the above example an interference error is returned again because the displacement of the compensated path in interpolation B is opposite to the programmed one.

Fig. 14.5.8-8

14.6 Three-dimensional Tool Offset (G41, G42)

The 2D tool radius compensation will offset the tool in the plane selected by commands G17, G18, G19. The application of the three-dimensional tool compensation enables the tool compensation to be taken into account in three dimensions.

14.6.1 Programming the Three-dimensional Tool Offset (G40, G41, G42)

Command

G41 (G42) Xp Yp Zp I J K D (E) will set up the 3D tool compensation.

Xp, Yp, Zp mean axes X, Y, Z or axes parallel to them (if any).

Unless reference is made to an axis the principal axes will be taken into account automatically. For example,

instruction G41 X I J K refers to space X Y Z instruction G41 U V Z I J K refers to space U V Z instruction G41 W I J K refers to space X Y W.

When the three-dimensional tool compensation is set up, each of addresses I, J, K has to be specified, or else the control will assume the state of 2D tool-radius compensation.

The values specified at addresses I, J, K are the components of the three-dimensional compensation vector. The values of the components are modal, i.e., each will remain effective until a reference is made to another value of I, J or K.

The compensation value to be applied can be called at address D.

The dominator constant of compensation calculation can be specified at address E.

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