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US 2016/0001411 A1Published application
Force responsive power tool
OwnerJohn Albertiinventor
Life of this patent
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Abstract
A controller coupled to a motion actuator responsively varies a speed of the motion actuator and an operating speed of a working surface within the range of an initial speed and a max speed and responds to a derived force that represents an amount of force an operator applies between a workpiece and the working surface. The controller, under both acceleration and deceleration, allows the operator with an applied force to manageably change simultaneously both a rate of work on the workpiece and the operating speed of the working surface according to a sensitivity profile expressing a relationship between the derived amount of force and the operating speed of the working surface. A tool for operating on the workpiece includes the motion actuator coupled to the working surface to engage the workpiece.
Claims24
A tool for operating on a workpiece, the tool comprising:
- a motion actuator configured to be coupled to a working surface to engage the workpiece;
- a controller coupled to the motion actuator to responsively vary a speed of the motion actuator and an operating speed of the working surface within the range of an initial speed and a max speed, and configured to respond to a derived force that represents an amount of force an operator applies between the workpiece and the working surface, wherein the controller is further configured, under both acceleration and deceleration, to allow the operator with an applied force to manageably change simultaneously both a rate of work on the workpiece and the operating speed of the working surface according to a sensitivity profile expressing a relationship between the derived amount of force and the operating speed of the working surface.
A method of controlling a power tool, comprising the steps of:
- deriving a first force applied by an operator to a workpiece onto the working surface during a first time interval;
- setting a first operating speed of a working surface coupled to a motion actuator based on a predetermined continuous response profile;
- deriving a second force applied onto the workpiece to the working surface of the power tool during a second time interval;
- when the second force is greater than the first force by a first predetermined amount, adjusting to a second operating speed based on a predetermined continuous response profile and the second force;
- when the second force is less than the first force by a second predetermined amount, adjusting to a third operating speed based on the predetermined continuous response profile and the second force;
- when the second force is determined to be less than the first force plus the first predetermined amount and greater than the first force minus the second predetermined amount, adjusting to a fourth operating speed to the power tool based on the predetermined continuous response profile and the second force.
3 more elements
A method of controlling a power tool, comprising the steps of:
- deriving a first force applied by an operator during a first time interval from a workpiece onto a working surface of the power tool;
- setting a first power to the power tool;
- deriving a second force applied by an operator during a second time interval from the workpiece onto the working surface of the power tool;
- when the second force is greater than the first force by a first predetermined amount, adjusting a second power to the power tool based on a sensitivity profile and the second force;
- when the second force is less than the first force by a second predetermined amount, adjusting a third power to the power tool based on the sensitivity profile and the second force;
- and
- when the second force is determined to be less than the first force plus the first predetermined amount and greater than the first force minus the second predetermined amount, applying a fourth power to the power tool based on the sensitivity profile and the second force.
4 more elements
A control system for a tool to operate on a workpiece, the control system comprising:
- a controller configured to couple to a motion actuator to responsively vary the amount of power delivered by the motion actuator to a working surface of the tool, and further configured to couple to a force detector configured to output a signal representing a derived amount of force an operator applies between the workpiece and the working surface, wherein the controller is further configured, under both acceleration and deceleration, to receive the signal from the force detector and allow the operator with an applied force to manageably change simultaneously both a rate of work on the workpiece and the operating speed of the working surface according to a sensitivity profile expressing a relationship between the derived amount of force and the operating speed of the working surface.
A tangible non-transitory computer readable medium for executing instructions on a computer, the medium including routines to:
- respond to a derived force representing a first force applied by an operator from a workpiece onto the working surface during a first time interval;
- set a first operating speed of a working surface coupled to a motion actuator;
- respond to a derived force representing a second force applied from the workpiece onto the working surface of the power tool during a second time interval;
- when the second derived force is greater than the first derived force by a first predetermined amount, adjust a second operating speed based on a predetermined continuous response profile and the second force;
- when the second derived force is less than the first derived force by a second predetermined amount, adjust a third operating speed based on the predetermined continuous response profile and the second force;
- when the second derived force is determined to be less than the first derived force plus the first predetermined amount and greater than the first force minus the second predetermined amount, apply a fourth operating speed to the power tool based on the predetermined continuous response profile and the second force.
3 more elements
A power tool for operating on a workpiece, the tool comprising:
- a motion actuator coupled to a working surface to engage the workpiece;
- a controller coupled to the motion actuator and configured to receive a signal representing a work load force the workpiece exerts on the working surface, and the controller is further configured to both:
- a) set a functional speed of the working surface between an initial speed at a first force and a tool max speed at a second force, and
- b) at all work load forces greater than the first force and less than the second force, lower a first rate of work at the functional speed relative to a second rate of work at the tool max speed at an equivalent work load force.
1 more element
Dependencies are inferred from the claim text.