XT LASER
Analysis of Automatic Nozzle Cleaning and Calibration Functions in Laser Cutting Machines
Written by Steven, Technical Operations at XT LASERPublished: July 2026 | Read Time: 3mins
TL;DR:Automatic nozzle cleaning and calibration have become standard features on modern intelligent laser cutting machines. This function reduces manual intervention and ensures cutting quality consistency through sensor monitoring, automatic cleaning procedures, and calibration processes. This article elaborates on current mainstream technical solutions from three dimensions: cleaning mechanisms, calibration principles, and automatic change integration.
Automatic Nozzle Cleaning Function
During laser cutting, molten metal spatter tends to adhere to the nozzle surface, causing abnormal airflow distribution and beam focus deviation, which in turn affects kerf quality. The automatic cleaning function is designed to address this issue.
Solution: The cleaning mechanism typically consists of dedicated brushes or cleaning components. The control system can automatically trigger cleaning actions during processing based on preset strategies. Weihong’s LS6000M system supports automatic cleaning triggered by three strategies: number of piercings, cutting time, or cutting distance. Multiple conditions can be selected simultaneously—if any condition is met, cleaning is executed, and the accumulated count resets after completion. Bochu Electronics’ HypCut system also supports an automatic cleaning trigger mechanism based on piercing count.
The cleaning process is: the cutting head moves to the brush position, descends to the set height, and wipes the nozzle surface back and forth along a preset path (wavy line, circle, or straight line). After completion, it automatically returns to the working position and performs calibration.
Automatic Calibration Function
After nozzle replacement or cleaning, recalibration is required to correct mechanical position deviations and ensure the spatial positioning accuracy of the cutting head.
Solution: The calibration process is typically executed automatically after nozzle installation or cleaning is completed. The system drives the cutting head to the calibration position, blows air to expel dust, and then completes coordinate calibration. This process is fully automated in mainstream systems such as Weihong and Ermaksan, requiring no manual intervention.
Some high-end systems incorporate vision or sensing technologies for more precise monitoring and calibration. Bystronic’s ICP intelligent cutting control system uses a coaxial high-frequency camera that captures 300 frames per second, combined with AI algorithms to judge nozzle status in real time. When wear or blockage is detected, it automatically calls control tools for inspection and replacement. TRUMPF’s SmartNozzle Automation can automatically check nozzle condition and beam centering.
Automatic Change and Intelligent Integration
In fully automated production lines, nozzle cleaning, calibration, and replacement have been integrated into a complete closed loop.
Solution: Weihong’s system supports a complete automatic replacement process: open protective cover→clean nozzle→remove old nozzle→install new nozzle→automatic calibration→close protective cover. Relevant alarms are suppressed throughout the process, and protection mechanisms are restored after completion. Mazak’s OPTIPLEX series integrates automatic nozzle change, automatic cleaning, and automatic focus positioning into an intelligent setup function, reducing operator intervention. BLM Group offers an automatic change device that can store up to 18 nozzles, integrating nozzle wear monitoring and calibration functions.
AMADA’s ORSUS-AJe also comes standard with an automatic nozzle changer that includes cleaning and calibration functions. The accompanying i-Process Monitoring system continuously analyzes cutting quality and automatically intervenes to ensure consistency.
Conclusion
Automatic nozzle cleaning and calibration functions have become standardized features in mainstream laser cutting systems. Their core value lies in replacing manual maintenance with automated processes, reducing downtime, and ensuring processing stability. This function has evolved from simple cleaning wiping to a complete closed-loop system incorporating visual inspection, AI judgment, and automatic replacement—a key technological element for achieving unmanned operation in laser cutting equipment.
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