Patent ID: 11883944
Assignee: ATLAS COPCO INDUSTRIAL TECHNIQUE AB
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 11:
12. A method for calibrating a sensor arrangement for an actuator arrangement of a handheld power tool, the handheld power tool comprising a trigger member including a magnetic element, the sensor arrangement comprising an analog magnetic field sensor configured to provide a signal proportional to a degree of depression of the trigger member, a first digital magnetic field sensor configured to provide a first signal in response to the magnetic element reaching a first position defining a first switching point of the first digital magnetic field sensor, and a second digital magnetic field sensor configured to provide a second signal in response to the magnetic element reaching a second position defining a second switching point of the second digital magnetic field sensor, the method comprising:
displacing the magnetic element of the trigger member along the sensor arrangement by depressing the trigger member;
retrieving a response of the first analog magnetic sensor;
retrieving a response of the first digital magnetic sensor;
retrieving a response of the second digital magnetic sensor;
determining a switching point of at least one of the first and second switching points; and
using the determined switching point as a fixed reference for a starting point for the analog magnetic sensor to determine when a trigger stroke should start.