Percussion tool
AssigneeMilwaukee Electric Tool Corporation
InventorsMatthew S. Zawisza, Andrew D. Van Hoorn, Ethan T. Zimany
Life of this patent
Estimating the term…
Abstract
A method for reducing vibrations in a percussion tool includes activating, using an electronic controller of the percussion tool, the motor of the percussion tool, determining, using the electronic controller, that the percussion tool is in a loaded condition, and operating, using the electronic controller, the motor in accordance with a predetermined profile in response to determining that the percussion tool is in the loaded condition. The method also includes determining, using the electronic controller, that the percussion tool is in a no-load condition and operating, using the electronic controller, the motor with reduced speed in response to determining that the percussion tool is in the no-load condition.
Claims9
A method for reducing vibrations in a percussion tool, the method comprising:
- activating, using an electronic controller of the percussion tool, the motor of the percussion tool;
- determining, using the electronic controller, that the percussion tool is in a loaded condition, wherein determining that the percussion tool is in the loaded condition includes determining that a motor current satisfies a current threshold;
- operating, using the electronic controller, the motor in accordance with a predetermined profile in response to determining that the percussion tool is in the loaded condition;
- determining, using the electronic controller, that the percussion tool is in a no-load condition, wherein determining that the percussion tool is in the no-load condition includes determining that the motor current does not satisfy the current threshold;
- operating, using the electronic controller, the motor with reduced speed in response to determining that the percussion tool is in the no-load condition;
- and
- updating the current threshold when switching from the loaded condition to the no-load condition, and when switching from the no-load condition to the loaded condition.
A method for reducing vibrations in a percussion tool, the method comprising:
- activating, using an electronic controller of the percussion tool, the motor of the percussion tool;
- determining, using the electronic controller, that the percussion tool is in a loaded condition;
- operating, using the electronic controller, the motor in accordance with a predetermined profile in response to determining that the percussion tool is in the loaded condition;
- determining, using the electronic controller, that the percussion tool is in a no-load condition;
- operating, using the electronic controller, the motor with reduced speed in response to determining that the percussion tool is in the no-load condition
- detecting a motor characteristic with a sensor;
- determining a variation in the motor characteristic,
- wherein determining that the percussion tool is in the no-load condition includes determining that the variation in the motor characteristic does not satisfy a threshold;
- and
- wherein determining that the percussion tool is in the loaded condition includes determining that the variation in the motor characteristic satisfies the threshold
- updating the threshold when switching from the loaded condition to the no-load condition, and when switching from the no-load condition to the loaded condition, and
- updating the threshold based on a battery pack voltage detected using the electronic controller.
A method for reducing vibrations in a percussion tool, the method comprising:
- activating, using an electronic controller of the percussion tool, the motor of the percussion tool;
- determining, using the electronic controller, that the percussion tool is in a loaded condition;
- operating, using the electronic controller, the motor in accordance with a predetermined profile in response to determining that the percussion tool is in the loaded condition;
- determining, using the electronic controller, that the percussion tool is in a no-load condition;
- operating, using the electronic controller, the motor with reduced speed in response to determining that the percussion tool is in the no-load condition;
- while the percussion tool is in the loaded condition
- detecting motor speed with a rotational speed sensor;
- and
- determining whether the motor speed satisfies a loaded condition speed threshold,
- wherein determining that the percussion tool remains in the loaded condition includes determining that the motor speed does not satisfy the loaded condition speed threshold, and
- wherein determining that the percussion tool is in the no-load condition includes determining that the motor speed satisfies the loaded condition speed threshold
- detecting a motor characteristic with a sensor;
- and
- determining a variation in the motor characteristic,
- wherein determining that the percussion tool is in the no-load condition includes determining that the variation in the motor characteristic does not satisfy a threshold;
- and
- wherein determining that the percussion tool is in the loaded condition includes determining that the variation in the motor characteristic satisfies the threshold
- updating the threshold when switching from the loaded condition to the no-load condition, and when switching from the no-load condition to the loaded condition, and
- updating the threshold based on a battery pack voltage detected using the electronic controller.
Dependencies are inferred from the claim text.