Laser Machining Device Door Interlock and Emergency Stop Release
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Solution Overview
Problem
Conventional laser machining devices require cumbersome and time-consuming manual intervention to release an urgent stop state when the laser beam is not emitted, such as during the movement of a galvano mirror, leading to increased machining time.
Innovation Solution
A laser machining device with a controller that detects the opening and closing of the machining chamber door to automatically release the urgent stop state when the laser emitter is not in a machining state, allowing for efficient resumption of operations without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the laser machining device is brought into urgent stop state when door is opened during machining, then safety is improved, but machining time increases due to manual intervention required to release the stop state
Solution Approach 1:
The system automatically releases the urgent stop state when the door is closed and the laser beam is not being emitted, eliminating the need for manual intervention. The controller monitors door status and laser emission state, and autonomously determines when to release the stop state, making the system self-serving in this aspect.
Solution Approach 2:
The system changes the operational parameter (urgent stop state) based on the combination of door status and laser emission state. When the door is closed and the laser is not emitting, the parameters change to release the stop state, allowing the system to adapt its behavior based on monitored conditions.
2Reliability
If the user must manually release the urgent stop state by turning the power switch off and on, then safety is ensured, but operational complexity increases
Solution Approach 1:
The controller automatically manages the release of the urgent stop state based on door status and laser emission conditions, eliminating the need for manual power switch operations. The system serves itself by monitoring conditions and autonomously releasing the stop state when appropriate.
Solution Approach 2:
The system uses feedback from door status detectors and laser emission state monitoring to automatically determine when to release the urgent stop state. This closed-loop feedback mechanism replaces manual intervention with automated decision-making based on real-time system state.
3Reliability
If the laser emitter is inhibited from emitting laser beam when door is opened, then safety is improved, but productivity decreases due to time required to resume machining
Solution Approach 1:
The system automatically resumes machining operations by releasing the urgent stop state when the door is closed and the laser is not emitting, eliminating the need for manual power switch operations and reducing downtime, thereby improving productivity while maintaining safety.
Solution Approach 2:
The system prepares to resume machining by automatically releasing the stop state in advance when conditions are safe (door closed, laser not emitting), rather than waiting for manual intervention. This preliminary automatic action reduces the time required to resume productive operations.
Data Source
AI summary
In a laser machining device, a laser emitter is inhibited from emitting a laser beam in a stop state, and can emit the laser beam in a machining state. A controller is configured to perform: in response to detecting opening of a door of a machining chamber, bringing the laser emitter into the stop state and disabling receipt of a release command via an interface; in response to detecting closing of the door while the laser emitter is in the stop state, determining whether the laser emitter is in the machining state when the opening of the door is detected; in response to determining that the laser emitter is not in the machining state, releasing the stop state of the laser emitter; and in response to determining that the laser emitter is in the machining state, enabling the receipt of the release command via the interface.