Cutting starts at the edge

Cutting shall start from the edge; As far as possible, cut from the edge rather than through the hole. Using the edge as the starting point will prolong the service life of the consumer. The correct method is to align the nozzle directly with the edge of the workpiece and then start the plasma arc.

Reduce unnecessary arcing time

Reduce unnecessary "arc striking (or arc guiding)" time; The consumption of nozzle and electrode is very fast during arc starting. Before starting, the cutting torch should be placed within the walking distance of the cutting metal.

Do not overload the nozzle

Do not overload the nozzle; Overloading the nozzle (i.e. exceeding the working current of the nozzle) will quickly damage the nozzle. The current intensity should be 95% of the working current of the nozzle. For example, the current intensity of the 100A nozzle should be set to 95A.

Adopt a reasonable tangent distance

Adopt reasonable tangent distance; According to the requirements of the instruction manual, adopt a reasonable cutting distance, which is the distance between the cutting nozzle and the workpiece surface. When punching, try to use the distance twice the normal cutting distance or the rated height that can be transferred by the plasma arc.

The perforation thickness should be within the allowable range

The perforation thickness should be within the allowable range of the machine system; The cutting machine cannot punch on the steel plate that exceeds the working thickness, and the usual perforation thickness is 1/2 of the normal cutting thickness.

Keep cutting torches and consumables clean

Try to keep the cutting torch and consumables of the CNC cutting machine clean: any dirt on the cutting torch and consumables will greatly affect the function of the plasma system. When replacing consumer parts, put them on a clean flannelette, often check the connecting rib of the cutting torch, and clean the electrode contact surface and nozzle with hydrogen peroxide detergent.

Minimize perforation and cutting

Try to minimize perforation and cutting. Perforation is one of the main reasons for the damage to the cutting nozzle because the back splashing of molten steel will damage the nozzle. If perforation and cutting are necessary, pre-drill with a drill at the perforation and cut from the pre-drill.

Cutting within the rated cutting thickness of the cutting machine

Try to cut within the rated normal cutting thickness of the cutting machine, and try not to cut at the limited cutting thickness. The normal cutting thickness of domestic cutting machines is generally 60% of the rated cutting thickness marked by the manufacturer, and try to cut within this thickness range, so that the cutting nozzle can be well protected.

The distance between the cutting nozzle and the steel plate remains constant

The distance between the cutting nozzle and the steel plate should be kept constant as far as possible, generally about 3-8mm. If it is too far, not only the power consumption is too large, the cutting penetration ability will be reduced, but also the electrode is relatively consumed, which will reduce the service life of the electrode; It's much simpler if it's too close. It takes a lot of nozzles. The service life of the nozzle will be doubled and even burned up.

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