Hwayuan Electric LGK-400HD User Manual

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LGK-120/200/300/400HD

AIR PLASMA CUTTING MACHINE

MANUAL

INSTRUCTION

(PLEASE READ IT CAREFULLY BEFORE OPERATION)

Table of Contents

Questions and Answers:

V
Veronica PowellAug 16, 2025
Why is the Hwayuan Electric LGK-400HD cutting quality bad?
- A
  Alicia FordAug 16, 2025
  Poor cutting quality with the Hwayuan Electric Cutter can stem from several factors. The gas pressure might be either too high or too low, requiring adjustment. Excess water in the air filter regulator cup can also be a culprit, so drain it regularly. Ensure the workpiece thickness is within the recommended range. Check the torch electrode and nozzle for damage, replacing them if necessary. Adjust the torch angle to ensure the plasma arc is perpendicular to the workpiece. Finally, adjust the cutting speed if it's too fast or too slow.
C
Christopher WilliamsAug 19, 2025
What to do if my Hwayuan Electric Cutter has no arc striking?
- D
  Danielle PierceAug 19, 2025
  If your Hwayuan Electric Cutter isn't striking an arc, but the cutting and gas pressure lights are on while the power supply and overheat lights are off, consider these possibilities: Ensure the cutting ground wire is properly connected. The gas pressure might be too high, so lower it. Inspect the torch electrode and nozzle for damage and replace if needed. A short circuit in the torch could be the problem, requiring torch replacement. Finally, the HF board might be damaged, requiring replacement.

Hwayuan Electric LGK-400HD Specifications

General

Model	LGK-400HD
Category	Cutter
Rated Duty Cycle	60%
Insulation Grade	F
Output Current	400A
Protection Grade	IP21
Working Gas	Air

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