Laser Processing Timing Adjustment for Axis Synchronization
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Solution Overview
Problem
Conventional laser processing systems fail to accurately synchronize the movement of the processing axis with the laser output command due to delays in the response of the laser excitation power supply and data transfer times, leading to reduced processing accuracy.
Innovation Solution
A laser processing system that includes a controller capable of generating and transmitting movement data and laser output commands based on a given program, with procedures to adjust the laser output command timing by calculating remaining time or execution time, considering factors like laser excitation power supply rise and fall times, data transmission delays, and servo delays, allowing for precise synchronization between axis movement and cutting position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the laser output command is synchronized with the movement command in the conventional route, then the control system is simple, but the synchronization accuracy deteriorates due to delays in laser excitation power supply response and data transfer
Solution Approach 1:
The patent applies preliminary action by calculating and compensating for delays in advance. The controller pre-calculates the delay time based on the relationship between axis movement and laser output, and adjusts the laser output command timing before actual execution. This allows the system to maintain high synchronization accuracy without requiring complex real-time adjustment mechanisms, thus resolving the contradiction between precision and complexity.
2Manufacturing precision
If the laser output command is switched at block boundaries in the processing program, then the control logic is simple, but the processing accuracy deteriorates due to unaccounted delays in laser excitation power supply response
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the timing parameter of laser output commands. Instead of switching commands strictly at block boundaries, the system calculates the optimal switching timing by considering the delay characteristics of the laser excitation power supply and adjusts the command timing parameter accordingly. This ensures accurate cutting position while maintaining manageable control logic.
Data Source
AI summary
A laser processing system capable of appropriately adjusting a timing to switch a laser output command with respect to the movement of an axis, and improving synchronization accuracy between the movement of the axis and a cutting position. A block remaining time of a block in execution is compared to a predetermined switching time. When the block remaining time is equal to or larger than the switching time, a laser output command of the current block is continued. On the other hand, when the block remaining time is smaller than the switching time, the laser output command to a laser oscillator is switched from the command of the current block to a command of a block subsequent to the current block.