# 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. With the occurrence of the error 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 through correction the point of selection of TRC or correction of the concerned contour element. A further possibility must use a tool radius with a smaller radius.
Parameter | %1: | Block number [-]
Block number of the concerned contour block.
%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.