Technical Center›Troubleshooting Guide›Edge Burr

#CUT QUALITY ISSUE

Edge Burr

Sharp, raised edges on cut profiles that require secondary deburring operations before parts can be used.

Edges with Burr

Clean Edge

Common Symptoms

• Top-Edge Burr: Sharp raised material along the top edge of the cut, typical of slow cutting speeds causing excessive heat accumulation.
• Bottom-Edge Burr: Burr formation on the underside, often accompanied by slight dross. Indicates focus position or gas pressure imbalance.
• Directional Burr: Burr present on one side of the cut direction only, indicating beam alignment or polarization issues.
• Corner Burr: Burr concentrated at corners and sharp turns in the cutting path where heat accumulates at reduced feed rates.

System Layer

This issue involves the following machine subsystems:

Optical System

Focus position relative to material surface determines energy distribution across the kerf.

Gas System

Gas pressure imbalance causes turbulent cooling or incomplete melt ejection at edges.

Process Parameters

Cutting speed and nozzle standoff distance affect edge formation quality.

Root Causes

Focus Position Error

Incorrect focus position relative to material surface causes uneven energy distribution across the kerf, resulting in incomplete separation at edges.

Gas Pressure Imbalance

Gas pressure either too low (fails to clear melt) or too high (causes turbulent cooling that re-solidifies material unevenly).

Beam Polarization Effect

Linear polarization causes direction-dependent absorption, resulting in burr formation on one cut direction while the other remains clean.

Nozzle Standoff Distance

Incorrect nozzle-to-plate distance disrupts gas flow dynamics and melt ejection, leading to inconsistent edge quality.

Recommended Solutions

Parameter	Poor Piercing (Typical)	Recommended Range	Improvement
Focus Position	-1mm (above center)	-3mm (deeper)	Burr reduced 70%
Gas Pressure	1.0 bar	0.7 bar	Clean edges
Cutting Speed	1200 mm/min	1400 mm/min	Minimal burr formation
Nozzle Standoff	0.5mm	1.0mm	Consistent gas flow

💡

Engineering Tip: Quick diagnostic method: Cut a 100mm × 100mm square and examine all four edges. If burr is consistent on all edges, the issue is parameter-based. If burr appears on only one or two edges, the issue is beam alignment or polarization-related. This distinction alone can save hours of troubleshooting.

Related MUXI Components

High Precision Nozzle

Precision-ground nozzle with optimized gas flow for burr-free cutting across various material thicknesses.

View Product →

Focus Alignment Tool

Precision focus calibration tool for accurate focus position setting to eliminate direction-dependent burr.

View Product →

Applicable Range

Power Range3kW - 20kW+

MaterialsCarbon Steel, Stainless Steel, Aluminum

Thickness1mm - 50mm+

💡Engineering Tip

For burr reduction, try lowering focus 0.5-1mm deeper into the material. Reduce gas pressure by 0.1-0.2 bar increments and observe change. Maintain 0.8-1.2mm standoff for optimal gas flow.

Need Custom Solution?

Send us your cut samples and parameters. Our engineers will analyze the burr pattern and recommend precise adjustments.

Contact Engineering Team

📖 Related Blog Articles

• Why Laser Cutting Produces Burr — Root causes & solutions for burr formation
• Solving Dross Issues in 3mm Stainless Steel — Expert guide to edge quality optimization

Need Technical Support or Pricing?

Our engineering team provides remote guidance and setup support for high-power fiber laser systems. Get tailored solutions for your specific cutting requirements.

muxiprecision.official@gmail.com WhatsApp: +86 18364532096

Need a Stable Fiber Laser Cutting Solution?

Explore Muxi High Power Laser Solutions →