# ID 90123

Contour error through selection point of tool radius compensation.
Description | The position of the selection point of tool radius compensation (TRC) is checked when Select inner corner (G238) is used. The check consists of a measurement of the distance between the selection point and the programmed contour element. The distance must be greater than the tool radius. When the error occurred, the distance was less than the tool radius.
Response | Class | 2 | Abort NC program processing.
Solution | Class | 6 | Check and modify the NC program either by correcting the point of selection of TRC or correcting the contour element affected. A further option is to use a tool radius with a smaller radius.
Parameter | %1: | Block number [-]
Block number of the contour block affected.
%2: | Block number [-]
Block number of the selection block.
%3: | Error value [0.1 µm or 0.0001°]
Distance between the concerned element of contour and the selection point of TRC.
%4: | Upper limit value [0.1 µm or 0.0001°]
Minimum distance corresponds to the current tool radius.
Error type | 1, Error message from NC program.