When using government services in our country, where bureaucracy dominates, a printer will be a very useful acquisition for every resident. In this regard, countless models of printing devices have been released that use different printing methods. Today we will focus on the drum unit.
Purpose and functions
The content of the article
- Purpose and functions
- Kinds
The drum unit is the main part of the latest printing devices. It looks like an aluminum tube coated with a special compound that can change its resistance under the influence of lighting. The principle of operation is that at first the drum is fully charged to repel particles of the coloring powder, then some areas are illuminated, which causes the attraction of grains of sand.
A drum with particles rolls over a sheet of paper, at the same time regaining the ability to repel all dust particles. Coloring elements stick to the paper, creating a blank for the image. The paper then passes into the oven, where the powder adheres tightly, creating a stable image.
Important! The accuracy of the transmitted image is ensured by laser beams, which fall only in those places where it is necessary.
It is located in a special cartridge that provides its operation and additional protection against accidental penetration of sunlight or mechanical damage. The cartridge is equipped with a plastic shutter, behind which the drum rests. The cartridge can be found behind the front cover of the printer. The text of the instruction will also help to find it, since all laser printers provide for manual cleaning.
Kinds
Different models for the printer differ from each other in the composition and resource of work. The composition is determined by the manufacturer, and, in fact, this information is not communicated to consumers. Covering all existing laser printers, their drums can be divided into two categories:
- Inorganic - drums coated with selenium. This technology is already outdated, and it is almost impossible to find similar printers or parts in official sales. If the client needs to replace the selenium element, then he should turn to private trade.
- Organic is a category of highly diverse print elements. Covered with the composition, which is the "secret recipe" of the company.
