Reaction on contour change
A direct contour change, e.g. from G41 to G42, is permitted without any explicit deselection (G40) of TRC. The contour change corresponds to a TRC deselection and selection. Contour change should only be carried out for linear NC blocks for exit and approach blocks. Circular blocks are also permitted directly before and after a contour change.
 | If a circular block is programmed during a contour change, an error message is output. |
Programming Example
Reaction on contour change
N05 G01 Y10 F100 G41 V.G.WZR=2 | (Linear block with select. of TRC left) (of the contour ) |
N10 X20 Y25 | |
N20 X40 G42 | (Linear block with select. of TRC right) (of the contour) |
N30 X60 Y10 | |
N40 X0 Y0 G40 | (Deselect TRC) |
N50 M30 |
