How to Maintain a Plasma Cutting Machine
Plasma cutting machines are used in a wide variety of applications. Most manufacturing departments use plasma cutting machines. Any malfunction of the equipment can greatly affect productivity. Even before a major malfunction occurs, a minor problem with the machine can result in a poor cut quality. Routine maintenance of your plasma cutting machine can help you identify and resolve problems before they become a series of malfunctions and prevent downtime.
Plasma cutting machines work on the principle of a complex interaction of various parts and systems. Proper care and maintenance ensure that all components interact smoothly and smoothly. Therefore, properly maintaining your entire plasma cutting machine should be an important part of any production process.
Below is a step-by-step guide to maintaining a plasma cutting machine.
Cleaning the Torch Body
Remove the torch parts and inspect the inside of the torch.
Inspect the threads for any signs of mechanical damage.
Clean the inside of the torch with an electrical contact cleaner and a cotton swab.
Remove the torch from the mounting tube and slide the mounting tube back to expose the torch/head assembly.
Make sure there are no leaks or damage at the weld.
Blow away metal dust buildup.
Clean the torch head
Wipe the entire torch or blow with your mouth to remove metal dust and dirt buildup. (Metal dust can deplete the high voltage required to start the plasma arc.)
Check for bent or frayed hoses, exposed wires, cracked fittings, or other damage.
Check the power supply
Use clean, dry shop air to blow metal dust buildup out of the power supply.
Metal dust can damage power supply components, especially PC boards.
Contactors, relays, and spark gap assemblies can also fail due to excessive metal dust buildup.
Check the torch cooling system
With water-cooled torches, check coolant flow in the water tank for signs of air intake or reduced flow. Make sure the return flow is within the specified gallons per minute.
Check the flow switch on the return line to make sure it is functioning properly. These prevent the torch from running at low coolant flow, which prevents overheating.
Check the coolant filter and pump screen and clean or replace if necessary.
If present, check coolant resistivity with a conductivity meter.
For most systems, the reading should not exceed 10 micromhos.
Coolant should be flushed and replenished every 6 months.