How to Setup, Debug and Use a Plasma Cutter for Beginners?

During operating, clean the dust in the cutting machine and the dirt on the components regularly, and check whether the wires are aging or not. Poor contact between the ground wire and the workpiece. Grounding is an indispensable preparation before cutting. If a dedicated grounding tool is not used, insulation on the surface of the workpiece and long-term use of a ground wire with serious aging, etc., will cause poor contact between the ground wire and the workpiece. Special grounding tools should be used, and check whether there is any insulation affecting the grounding wire and the surface of the workpiece, and avoid using aging grounding wires. When the spark generator cannot automatically cut off the arc, the plasma cutting machine must first ignite the plasma arc. The high-frequency oscillator excites the gas between the electrode and the inner wall of the nozzle to generate a high-frequency discharge to partially ionize the gas to form a small arc. A small arc is subjected to the action of compressed air and ejected from the nozzle to ignite the plasma arc, which is the main task of the spark generator.

1. To ensure the correct gas pressure and flow of plasma. The correct gas pressure and flow of plasma are very important to the service life of consumable parts. If the air pressure is too high, the life of the electrode will be greatly reduced; if the air pressure is too low, the life of the nozzle will be affected.
2. Use a reasonable cutting distance. According to the requirements of the instruction manual, use a reasonable cutting distance. The cutting distance is the distance between the cutting nozzle and the surface of the workpiece. When perforating, try to use twice the normal cutting distance or use the plasma arc to transmit. The maximum height.
3. The thickness of the perforation should be within the allowable range of the machine system. The plasma cutter cannot perforate the steel plate that exceeds the working thickness. The usual perforation thickness is 1/2 of the normal cutting thickness.
4. Do not overload the nozzle. If the nozzle is overloaded (that is, the working current of the nozzle is exceeded), the nozzle will be damaged quickly. The current intensity should be 95% of the working current of the nozzle. For example: the current intensity of a 100A nozzle should be set to 95A.
5. Keep the plasma gas dry and clean. The plasma system needs dry and clean plasma gas to work properly. Dirty gas is usually a problem in the gas compression system, which shortens the service life of consumable parts and causes abnormal damage. The method to test the gas quality is to set the cutting torch in the test state, and place a mirror under it to consume the gas in the cutting torch. If water vapor and mist appear on the mirror, you need to find out the reason and correct it.
6. Plasma cutting should start from the edge as much as possible, instead of perforating cutting. Using the edge as the starting point will extend the life of the consumable parts. The correct method is to directly aim the nozzle at the edge of the workpiece before starting the plasma arc.
7. Avoid the extension and extension of the plasma arc. If the plasma arc can only be extended and extended to contact the surface of the workpiece, the plasma arc will produce such extension and extension at the beginning and end of cutting, which will cause abnormal damage to the nozzle. This problem can be avoided if the correct edge start technique is used and the appropriate "arc breaking" signal time is selected.
8. Reduce unnecessary "arc starting (or arc guiding)" time. The nozzle and electrode are consumed very quickly when starting the arc. Before starting, the cutting torch should be placed within the walking distance of cutting metal.
9. Applying splash-proof chemical coating on the protective shell Splash-proof chemical coating helps to reduce the accumulation of slag on the protective shell. But be sure to remove the protective shell from the torch before applying splash-proof paint.
10. Remove the slag on the protective shell.