All posts by lodyr

Printing theory. Dual-component systems. Part 6

Dual-component systems are analog copiers that have a source of light. In copiers it is an exposure lamp. There are two different types of cartridges used in this kind of machines. First one includes both toner and developer in a single unit, and the second type is where the developer is separated from the toner. Since this technology is not new, there are quite a few variations of it. But still, the theory is all the same for each of those. Continue reading Printing theory. Dual-component systems. Part 6

Printing theory. Brother HL-1240 toner. Part 5

This article will mainly describe the Brother TN-460, but also it is covering other Brother drum cartridges. The toner of this cartridge is also non-magnetic, but since the working principle is very unique, Brother will have a separate article here. Also, this article will give you some tips on how to troubleshoot your cartridge. Nevertheless, the theory for all Brother cartridges is the same, the toner for each particular model is different. Using the toner from one cartridge with another, will give you quite different results. So, you need to be always sure that your current toner suits your cartridge. Continue reading Printing theory. Brother HL-1240 toner. Part 5

Printing theory. Non-magnetic carousel color toner. Part 4

The carousel color type is another type of the printing engine, which is different from the single-pass type.  Single-pass systems are more expensive to produce than the carousel system. And they are. Since there’s a separate laser scanner in the single-pass systems and each individual cartridge has all the associated security. And there’s only one for each cartridge in the carousel system. Maybe it is not as complicated as a single-pass system, but the process still includes quite a few interesting things to look at. All cartridges, and there are four of them, are being held by the carousel. It rotates depending on which cartridge is needed at the moment. While the technology is developing, this kind of a system is usually used in cheaper printers. For example, HP CLJ 1500 and 2500 are pretty similar to the HP CLJ 4500, but the first ones are more advanced. Continue reading Printing theory. Non-magnetic carousel color toner. Part 4