FASTENER SETTING ALGORITHM FOR DRILL DRIVER
First Claim
1. A power tool for driving a fastener into a workpiece, the power tool comprising:
- a housing;
an electric motor disposed in the housing and drivably connected to an output spindle to impart rotary motion thereto;
a controller disposed in the housing, the controller configured to monitor the power tool, determine if a cam-out criteria indicative of the power tool becoming disengaged with the fastener has been met, and modify operation of the power tool in response to the cam-out criteria having been met.
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Accused Products
Abstract
A method is provided for setting a fastener in a workpiece. The method includes: monitoring a parameter of the power tool during operation of the power tool, where the parameter is indicative of the placement of a fastener being driven by the power tool in relation to the workpiece; detecting, a change in the parameter, where the detected change in the parameter indicates that the power tool became disengaged with the fastener; modifying operation of the power tool in response to the detected change in the parameter; subsequently detecting a second change in the parameter; and interrupting transmission of torque to the output spindle in response the detected second change in the parameter, thereby properly setting the placement of the fastener in relation to the workpiece.
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Citations
21 Claims
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1. A power tool for driving a fastener into a workpiece, the power tool comprising:
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a housing; an electric motor disposed in the housing and drivably connected to an output spindle to impart rotary motion thereto; a controller disposed in the housing, the controller configured to monitor the power tool, determine if a cam-out criteria indicative of the power tool becoming disengaged with the fastener has been met, and modify operation of the power tool in response to the cam-out criteria having been met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A power tool for driving a fastener into a workpiece, the power tool comprising:
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a housing; an electric motor disposed in the housing and drivably connected to an output spindle to impart rotary motion thereto; a controller disposed in the housing, the controller configured to monitor the power tool and determine if a cam-out criteria indicative of the power tool becoming disengaged with the fastener has been met; the controller further configured to monitor the power tool and determine if a fastener setting criteria indicative of a placement of the fastener being driven by the power tool in relation to the workpiece; wherein, when the controller determines that the fastener criteria has been met and the cam-out criteria has not been met within the predetermined time before the controller determines that the fastener criteria has been met, the controller operates the drill so as to decrease torque supplied to the output spindle and seat the fastener in the workpiece. - View Dependent Claims (15, 16)
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17. A method of controlling operation of a power tool having an electric motor drivably connected to an output spindle to impart rotary motion thereto, comprising:
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monitoring, by a controller residing in the power tool, at least one parameter of the power tool during operation of the power tool; determining, by the controller, if a cam out criteria indicative of the power tool becoming disengaged with the fastener has been met; modifying, by the controller, operation of the power tool in response to determining that the cam out criteria has been met; wherein the determining whether the cam out criteria has been met is based at least in part on the at least one parameter. - View Dependent Claims (18, 19, 20, 21)
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Specification