How to Maintain CNC Plasma Cutting Torch

This article is reprinted from YeahLegend blog:
http://yeahlegend.com/blog/?p=102

Plasma cutting torch is the largest consumption among the consumables from the perspective of plasma cutting method. How yo extend the lifespan of plasma cutting torch during plasma cutting process? Several tips are as follows:

1. To assemble cutting torch correctly

We should assemble cutting torch carefully and correctly to make sure all the components are matched well, gas and cooling air are circulating smoothly. All the components should be placed in clean lint before assembly for avoiding dirt. Proper lubricating oil should be added into O-Ring till O-Ring becomes bright.

2. To change the consumables before complete breakdown

The worn electrode, nozzle and swirl ring will cause plasma arc and brought destructive damage to cutting torch. Therefore, consumables should be checked in time once we found the cutting quality is not as good as before.

3. To clean the connecting thread of cutting torch

When changing consumables or making daily maintenance, cutting torch and external thread should be clean. If necessary, the connecting thread should be washed or repaired.

4. To clean the surface of electrode and nozzle

Generally speaking, the surface of nozzle and electrode is electric. If dirt was in the surface, cutting torch could not work as usual. Oxidation of hydrogen cleaner should be used to clean away the dirt.

5. To check the gas and cooling air everyday

Gas, flow and pressure of cooling air should be checked everyday. If the flow is not sufficient or gas is leaked out, machine should be shut down and solve the problems first.

6. To avoid crash and damage to cutting torch

In order to avoid crash and damage to cutting torch, programming should be made correctly and avoid the system walk out of the limitation. AVTHC (Arc Voltage Torch Height Control) or anti-collision device should be installed for avoiding crash or any damage to cutting torch.

CNC plasma cutting machine is relatively more expensive than CNC flame cutting machine. But in the long term, flame cutting machine will consume more. What we should do is to protect the cutting components and cutting torch correctly. Therefore, plasma cutting is more economical and practical than flame cutting.