Maximum power tool startup torque
AssigneeMilwaukee Electric Tool Corporation
InventorsTimothy R. Obermann, Douglas R. Fieldbinder, Ian A. Duncan, Robert Turney
Life of this patent
Estimating the term…
Abstract
A power tool including a housing, an input, a gear train, a motor at least partially supported by the housing and coupled to the gear train, and a controller including a processor and a memory. The controller is coupled to the input and the motor and is configured to receive an input signal from the input, determine an operating direction and an operating speed based on the input signal, cause the motor to rotate the gear train in a direction opposite the operating direction for a predetermined amount of rotation, and cause the motor to rotate in the operating direction at the operating speed.
Claims20
A power tool comprising:
- an input;
- a gear train;
- a motor coupled to the gear train;
- an output member coupled to the gear train;
- and
- a controller including a processor and a memory, the controller connected to the input and the motor, the controller configured to:
- receive an input signal from the input,
- determine an operating direction based on the input signal,
- control the motor to rotate the gear train in a direction opposite the operating direction until a backlash is taken up in the direction opposite to the operating direction, and
- control the motor to rotate the gear train in the operating direction to exhaust the backlash in the operating direction.
A method of operating a power tool, the method comprising:
- receiving an input signal;
- determining an operating direction based on the input signal;
- controlling a motor to rotate a gear train in a direction opposite the operating direction until a backlash is taken up in the direction opposite to the operating direction;
- and
- controlling the motor to rotate the gear train in the operating direction to exhaust the backlash in the operating direction.
A power tool comprising:
- an input;
- a gear train;
- a motor coupled to the gear train;
- an output member coupled to the gear train;
- and
- a controller including a processor and a memory, the controller connected to the input and the motor, the controller configured to:
- receive an input signal from the input,
- determine a forward direction based on the input signal,
- control the motor to rotate the gear train in a reverse direction until a backlash is taken up in the reverse direction, and
- control the motor to rotate the gear train in the forward direction to exhaust the backlash in the forward direction.
Dependencies are inferred from the claim text.