Electric machine tool and method for controlling the electric machine tool
AssigneeRobert Bosch GmbH
InventorChristoph Steurer
Life of this patent
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Abstract
In a method for controlling an electric machine tool having an electric motor for driving a rotating insertion tool, the electric machine tool is operated in one of multiple operating modes, and at least one parameter of the machine tool is detected. The instantaneous operating state of the electric machine tool is ascertained and evaluated based on the detected parameter. A protective function is activated when the presence of a critical operating situation is recognized during the evaluation of the instantaneous operating state. The instantaneous operating mode of the electric machine tool is detected, and the evaluation of the instantaneous operating state is adapted in each case to the instantaneous operating mode.
Claims8
A method for controlling an electric machine tool having an electric motor for driving a rotating insertion tool, comprising:
- operating the electric machine tool in one of multiple predefined operating modes;
- detecting an instantaneous operating mode of the electric machine tool;
- detecting at least one parameter of the machine tool;
- evaluating an instantaneous operating state of the electric machine tool based on the at least one detected parameter of the machine tool;
- and
- activating a protective function when a presence of a critical operating situation is recognized during the evaluation of the instantaneous operating state;
- wherein the evaluation of the instantaneous operating state of the electric machine tool is adapted in each case based on the detected instantaneous operating mode,
- wherein an instantaneous rotational acceleration of the electric machine tool is detected as the at least one parameter of the electric machine tool, and
- wherein, a first operating mode characterized by a low rotational speed of the rotating insertion tool has a first acceleration threshold value, and a second operating mode characterized by a high rotational speed of the rotating insertion tool has a second acceleration threshold value, wherein the first acceleration threshold value is higher than the second acceleration threshold value, wherein the protective function is activated if the instantaneous rotational acceleration exceeds the first acceleration threshold value in the first operating mode or exceeds the second acceleration threshold value in the second operating mode.
Dependencies are inferred from the claim text.