Diagnose and eliminate dross, cutting burrs, piercing explosion, and weld seam porosity with proven parameter corrections.
An engineer's diagnostic guide to identifying and fixing dross/slag, thermal burnouts, cut edge discoloration, and porosity in real-time shop floor operations.
| Observed Defect / Symptom | Root Cause Analysis | Immediate Operator Solution | Recommended Parameter Adjustment |
|---|---|---|---|
| Bottom Dross / Slag on Stainless Steel | Insufficient N2 gas pressure or focal point positioned too high above sheet. | Increase Nitrogen assist pressure (16–20 Bar) and lower the focal position into the bottom 1/3 of plate thickness. | Focal Position: -2.0mm to -4.0mm Gas Pressure: +3.0 Bar |
| Corner Burnout / Overheating on Carbon Steel | Excessive heat buildup at sharp vertices during oxygen cutting. | Enable CNC Corner Deceleration and Power Frequency Modulation (Curve Power Control). | Enable "Corner Cooling Point" Reduce Duty Cycle to 60% at turns |
| Rough Striations / Vertical Grooving | Cutting speed too high or dirty/damaged protective window absorbing beam energy. | Inspect lower protective lens under 100X microscope. If clean, reduce feed rate by 15%. | Feed Rate: -10% to -15% Check Nozzle Centering & Coaxiality |
| Piercing Blowout on Extra-Thick Plates (20mm+) | Single-stage blast piercing causing explosive molten spatter backfire. | Switch from direct piercing to 3-Stage Progressive Frequency-Ramped Piercing with Oil Spray. | Use Stage 1-3 Pulse Piercing Nozzle Stand-off: 5.0mm → 1.0mm |