Servo Motor Torque Detection for Bag Sealing Timing
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Solution Overview
Problem
Existing bag making and packaging machines face challenges in accurately detecting the timing of articles arriving at the lateral sealing mechanism without additional sensors, which affects processing efficiency and increases costs.
Innovation Solution
Incorporating a servo motor and falling time detector that uses torque or axial rotation information to detect when articles have fallen to the height position of the lateral sealing mechanism, eliminating the need for additional sensors and allowing for accurate timing adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a photoelectric sensor is added to detect article timing, then detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The servo motor that already exists in the system performs dual functions: driving the lateral sealing mechanism and detecting article timing through its torque sensor. The system uses its own existing resources (servo motor torque information) to solve the detection problem, eliminating the need for external photoelectric sensors.
Solution Approach 2:
The servo motor is made multi-functional by using it both for driving the lateral sealing mechanism and for detecting article timing. The torque sensor, originally intended only for control purposes, is repurposed to detect when an article arrives at the sealing position, thereby serving multiple functions with a single component.
2Productivity
If a sensor is added to detect article timing, then processing efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The system achieves article timing detection using only the torque sensor that is already part of the servo motor assembly. By processing torque information from the existing servo system, the invention eliminates the need for additional detection sensors, thereby maintaining high processing efficiency while avoiding increased manufacturing costs.
Solution Approach 2:
Instead of using expensive photoelectric sensors, the invention utilizes the already-present torque sensor information from the servo motor. This approach uses a cheaper, existing resource (torque data) rather than adding costly new components, achieving the same detection function at lower cost.
3Productivity
If the lateral sealing mechanism operates faster, then productivity is improved, but article timing synchronization becomes more difficult
Solution Approach 1:
The system continuously monitors torque information from the servo motor during high-speed operation. This real-time feedback allows the control unit to dynamically adjust and synchronize the lateral sealing mechanism's operation with the actual article arrival timing, maintaining precision even at increased speeds.
Solution Approach 2:
The invention replaces traditional mechanical timing mechanisms (such as photoelectric sensors and mechanical linkages) with an information-based detection system using torque data. This substitution enables more flexible and accurate timing synchronization that can adapt to varying operating speeds without mechanical constraints.
Data Source
AI summary
Provided is a bag making and packaging machine capable of accurately detecting, with a simple configuration, the timing at which an article that is dropped and supplied from an article supply device disposed above the bag making and packaging machine, will arrive at a lateral sealing mechanism. A bag making and packaging machine receives articles dropped and supplied from a combination weighing machine disposed above the bag making and packaging machine and packages the articles in a bag to be made. The bag making and packaging machine includes a lateral sealing mechanism, a servo motor, and a falling time detector. The lateral sealing mechanism laterally seals a packaging material of a cylindrical shape. The servo motor drives the lateral sealing mechanism.