METHOD FOR DETECTING A CHANGE OF MATERIAL ON MACHINING

摘要

The invention relates to a method for detection of a change of material on the operation of machining by a tool, in which the current or power drawn by a drive motor (1) for the tool is measured and thresholds are imposed for detection of each change in measurement of the current and/or power. According to the invention, the thresholds are placed in the current derivative and/or absorbed power.