Electric Cutting Tool Stroboscopic Blade Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric cutting tools face difficulties in aligning and determining the position of the saw blade due to high-speed repetitive movements, which complicates user alignment and reduces operational efficiency, as existing solutions require additional components and suspension of tool operation.
Innovation Solution
The implementation of a stroboscopic effect using a Hall sensor to control an LED illuminating device, varying its frequency based on the motor's rotational speed, creating a visually stationary or moving illusion of the saw blade without modifying the mechanical transmission or motor control, allowing continuous operation and alignment without speed reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the saw blade moves at high speed during operation, then cutting efficiency is improved, but it becomes difficult to align the saw blade with the workpiece and determine its position
Solution Approach 1:
The patent applies periodic action by using a stroboscopic light that flashes at specific intervals synchronized with the saw blade's movement cycle. This periodic illumination creates the visual effect of the moving saw blade appearing stationary, allowing users to align and position the blade accurately while maintaining high cutting speeds without requiring speed reduction
2Measurement precision
If the electric cutting tool suspends movement to allow alignment, then alignment precision is improved, but operational efficiency is seriously impacted
Solution Approach 1:
The patent introduces an intermediary element - the stroboscopic light - that mediates between the moving saw blade and the user's visual perception. This light creates an optical illusion that allows simultaneous achievement of alignment precision and continuous operation, eliminating the need to suspend tool movement for alignment purposes
3Ease of operation
If additional components are added to make the tool memorize and suspend the saw blade position, then alignment capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical systems (memory devices, suspension mechanisms, additional sensors) with a simple optical solution - a stroboscopic light. This substitution dramatically reduces device complexity while maintaining or improving alignment capability, as the optical effect naturally creates the desired visual stationary effect without requiring mechanical intervention
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances alignment precision and operational efficiency by providing a clear visual of the saw blade's position without additional sensors or mechanical changes, maintaining high-speed operation and adaptability across various speed ranges, including off-load conditions.
Implementation Method 1
The sensor is a Hall sensor fixed to the motor
Implementation Method 2
The implementation of a stroboscopic effect using a Hall sensor to control an LED illuminating device, varying its frequency based on the motor's rotational speed, creating a visually stationary or moving illusion of the saw blade
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An electric cutting tool is provided which includes a motor, a cutting member driven by the motor, an illuminating device, and a controller for controlling the illuminating device. The cutting member is adapted to move in a repetitive way during operation. The controller is adapted to control the illuminating device according to a rate of a movement of the cutting member to generate an illumination varied in a particular frequency, the particular frequency making the cutting member representing a still visual effect when the cutting member is moving at the rate. As the invention using a stroboscopic effect, the electric cutting tool does not need to stop the motor or reduce the speed of the cutting to carry out the alignment, so that a high working efficiency is ensured.