Device and method for measuring tools

A method for determining a dimension of a tool having a cutting edge using a device including a first light source, an image sensor, and an analyzing unit, the method comprising:

• emitting, by the light source, light parallel to a first axis, wherein the image sensor is associated with a second axis extending orthogonally to a sensing surface of the image sensor, the first axis and the second axis being inclined relative to each other, and wherein the light emitted from the first light source is reflected by the cutting edge of the tool in such a way that the reflected light generates light spots arranged in a line on the image sensor;
• and
• determining, by the analyzing unit, positions of the light spots;
• and
• determining the dimension of the tool based on the positions of the light spots,
• wherein:
• the determining of the dimension is aided by a compensation calculation based on the positions of the light spots,
• prior to determining the dimension of the tool, a reference body is connected to a tool holder of the machining equipment and measured using the image sensor, and
• during subsequent determination of the dimension of the tool, the tool is connected to the tool holder of the machining equipment and, based on the results of the measurement of the reference body, a correction value is generated which contains information about an exact position of the tool holder relative to reference coordinates of the image sensor.