Why Your Plasma Cutter Leaves Slag
This guide walks through what actually causes dross in real-world fabrication shops — and what to adjust before you upgrade equipment.
If your plasma cutter is leaving slag (dross) on the bottom of your cuts, one of three things is happening:
- Your settings are wrong.
- Your consumables are worn.
- You’re pushing the machine outside its real capacity.
Most people assume it’s the plasma cutter’s fault. It usually isn’t. Slag is a symptom. Fix the root cause and your cuts clean up fast.
This guide walks through what actually causes dross in real-world fabrication shops — and what to adjust before you upgrade equipment.