Is it normal for the high-power laser cutting head to perforate and jitter?

As a leading manufacturer specializing in fiber laser cutting machines, handheld laser welding machines, and laser cleaning machines, Hebei Pufeite Intelligent Equipment Co., Ltd. frequently addresses a common concern among users: Why does the cutting head of high-power laser cutting machines jitter continuously when cutting thick plates, especially during the initial perforation stage?

Why Does the Cutting Head Jitter Occur?

1. Intense Energy Impact: When cutting thick plates, high-power lasers release concentrated energy to penetrate the material. The sudden vaporization and explosion of the molten metal generate a strong recoil force, which directly acts on the cutting head, causing mechanical vibrations.

2. Unstable Assist Gas Flow: High-pressure assist gases, like oxygen or nitrogen, are used to expel molten metal. In thick plates, the deep perforation creates turbulent gas flow inside the hole. Fluctuations in gas pressure push against the cutting head, contributing to the jitter.

3. Mechanical Resonance: If the machine's mechanical structure lacks sufficient rigidity or parameters are incorrectly set, the high-frequency energy impact may match the natural frequency of the cutting head components, triggering resonance and amplifying the jitter.

Is the Jitter Normal?

Slight jitter during perforation is generally normal. The machine is designed to withstand the impact forces from laser energy and gas flow. This minor vibration typically doesn't affect cutting quality or the machine's lifespan, as our fiber laser cutting machines at Hebei Pufeite are engineered with optimized mechanical structures and buffer mechanisms.

However, severe, long-lasting jitter accompanied by abnormal noises is a cause for concern. It may indicate issues such as loose mechanical components (e.g., guides, ball screws), uncalibrated parameters (laser power, gas pressure), unresolved resonance problems, or internal failures in the cutting head (e.g., loose lenses, sensor malfunctions).

How to Determine Normal vs. Abnormal Jitter?

• Normal Jitter: The vibration subsides after perforation and doesn't affect the subsequent cutting process. The cut surface remains smooth, and the machine operates stably.

• Abnormal Jitter: The jitter persists throughout the cutting process, causing poor cutting quality (e.g., rough edges, incomplete cuts), or leading to perforation failures. Immediate attention is required to prevent further damage to the equipment.

Solutions Offered by Hebei Pufeite

If you encounter abnormal jitter with your laser cutting equipment, Hebei Pufeite is here to help:

• Parameter Optimization: Our experts can adjust laser power, perforation time, and gas pressure to minimize impact forces.

• Mechanical Inspection: We conduct thorough checks on mechanical connections, ensuring all components are securely fastened and free from wear.

• Resonance Elimination: By enhancing mechanical rigidity and fine-tuning structural settings, we eliminate resonance risks.

• Technical Support: Our professional after-sales team provides remote diagnosis and on-site maintenance services, ensuring your equipment returns to peak performance quickly.

At Hebei Pufeite Intelligent Equipment Co., Ltd., we're committed to delivering reliable laser equipment and comprehensive support. For any inquiries about fiber laser cutting machines, handheld laser welding machines, laser cleaning machines, or technical issues like cutting head jitter, contact us today! Let us help you optimize your production efficiency and ensure seamless operation.