METHOD FOR DETERMINING THE DIRTINESS OF AN ELECTRICALLY DRIVEN CUTTING TOOLS , AND HAIR CUTTING DEVICE

摘要

The invention pertains to a method for determining the dirtiness of a cutting tool and to a hair cutting device with an apparatus for determining the dirtiness of the cutting tool thereof. The method is intended for cutting tools that carry out a back and forth motion and are driven by an oscillating electric motor or linear motor. In order to determine the dirtiness in accordance with said method, a parameter is evaluated that is correlated with the respective state of motion of the cutting tool and used for controlling the oscillating electric motor or linear motor. Parameter changes are continuously measured and cause a dirtiness counter to count up if the parameter value exceeds at least one threshold value. The fact that the count of the dirtiness counter has reached or exceeds a reference value is then conventionally indicated.