Power Tool Position Feedback for Precise Screw Driving Depth
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Solution Overview
Problem
Conventional power tools require manual throttling to achieve precise screw driving depth, leading to challenges such as overdriving or underdriving, which can result in damage to screws or workpieces.
Innovation Solution
A power tool with position feedback control using sensors and a controller to determine operating angles and drive depth, allowing for automatic adjustment and mode selection to ensure accurate screw driving without manual precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual throttling is used to control screw driving depth, then the user can operate the tool, but precision and reliability of depth control deteriorate
Solution Approach 1:
The patent implements a feedback control system using position sensors to detect the depth of screw driving in real-time. The controller receives this position information and automatically adjusts the motor control to stop the driving operation at the predetermined depth, eliminating the need for manual throttling while maintaining ease of operation and achieving precise depth control.
2Device complexity
If manual throttling is used, then the tool structure remains simple, but the reliability of preventing overdriving or underdriving deteriorates
Solution Approach 1:
The feedback control system continuously monitors the screw driving depth through position sensors and compares it with the predetermined depth value. When the detected depth matches the target depth, the controller automatically stops the motor, ensuring reliable prevention of both overdriving and underdriving. This automated feedback mechanism significantly improves reliability while the added complexity is minimal and focused only on the control system.
3Manufacturing precision
If automatic position feedback control is implemented, then depth precision improves, but device complexity increases
Solution Approach 1:
The patent uses position sensors to detect the depth of screw driving and feeds this information back to the controller. The controller then automatically adjusts the motor control to achieve precise depth control. This feedback mechanism improves depth precision while keeping the added complexity minimal and focused only on the control system components.
Solution Approach 2:
The system performs self-service by automatically detecting its own position state through sensors and autonomously adjusting its operation to maintain precise depth control. The controller monitors the driving process in real-time and makes necessary adjustments without external intervention, enabling the system to self-correct and maintain precision throughout the screw driving operation.
Data Source
AI summary
Various embodiments of power tool and method of operating same are described. The power tool may include a first position sensor, a second position sensor, a third position sensor, and a controller. The first, second, and third position sensors may each generate a signal indicative of a distance between the respective position sensor and a workpiece. The controller may determine one or more angles of the power tool with respect to the workpiece based on the first, second, and third signal and present an indication as to whether the one or more angles are within a predetermined range. The controller may further obtain a depth measurement based on the first signal, the second signal, and the third signal and generate, based on the obtained depth measurement, one or more control signals that control operation of the power tool.