Jigsaw Sensor Feedback for Cutting Path Accuracy
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Solution Overview
Problem
Existing hand-held jigsaws lack the ability to adjust the saw blade's angle during the cutting process, limiting their flexibility in cutting curves and radii, and often rely on predefined angles, which can lead to inaccuracies and reduced reliability in workpiece processing.
Innovation Solution
A hand-held jigsaw equipped with a sensor device that generates actuating signals for adjustable components, including the drive motor, to follow a specified target line, with a plausibility check ensuring sensor signals are within defined ranges, allowing for continuous monitoring and adjustment of the cutting path, enabling variable adjustments and improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a hand-held jigsaw is equipped with a sensor device and automated control system to follow a target line, then manufacturing precision and reliability are improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback control system where a sensor device continuously detects the position of the saw blade relative to a target line, generates sensor signals, and feeds them back to a control device that adjusts the saw blade position in real-time. This closed-loop feedback mechanism ensures high cutting accuracy by constantly monitoring and correcting deviations from the desired cutting path.
Solution Approach 2:
The patent replaces manual mechanical positioning with an automated electromechanical system. Instead of relying on operator skill to guide the saw along a target line, the system uses optical or electromagnetic sensors to detect position and electronic actuators to automatically adjust the saw blade position, substituting mechanical manual control with an automated sensing and actuation system.
2Adaptability or versatility
If the saw blade angle is fixed in advance, then device complexity is reduced, but adaptability and versatility are worsened
Solution Approach 1:
The patent transforms the static, fixed blade angle configuration into a dynamic, adjustable system. The saw blade angle and position are no longer fixed in advance but can be continuously adjusted during operation based on real-time sensor feedback. This dynamic adjustment capability allows the system to adapt to different cutting requirements, radii, and curve complexities while maintaining operational simplicity through automated control.
3Reliability
If sensor signals are processed without plausibility check, then processing speed is improved, but reliability is worsened
Solution Approach 1:
The patent implements a selective plausibility check mechanism that performs validation on critical sensor signals while allowing rapid processing of routine data. The control device evaluates whether sensor signals fall within expected ranges and only triggers detailed verification or corrective actions when anomalies are detected. This partial validation approach ensures reliability for critical measurements while minimizing time loss through selective rather than exhaustive checking.
Data Source
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AI summary
The invention relates to a method for operating a power tool (1), especially a hand-held power tool, whereby sensor signals of a sensor device (13) are subjected to a plausibility check prior to processing, an error signal being generated if a sensor signal is outside a defined normal range.