Electronic engraving plate-making is a process of converting optical signals or digital signals into mechanical movements of the electro-engraving needle through photoelectric conversion and electromagnetic conversion. During the engraving process, the electronic engraving machine uses a frequency generator to produce oscillations of a certain frequency and appropriate amplitude. The oscillation frequency determines the number of cells engraved per second. The digital signals transmitted from the image memory are converted into analog signals by a digital-to-analog converter and then combined with the aforementioned amplitude to control the electro-engraving needle to engrave cells of different sizes and depths on the copper layer surface of the rotating plate cylinder at a constant speed.

According to the different densities of the original, the scanning head scans the light signals reflected from the original with varying intensities. These light signals are converted into electrical signals by the photoelectric converter, and then processed by amplifiers and data processing to convert the light intensity into the size of the current. After signal parameter transfer, serial-to-parallel conversion, level selection, and magnetic core memory and channel selection, level correction and parameter conversion are carried out. After image processing and signal output amplification, the engraving head is controlled to engrave on the copper cylinder.

The scanning receiving unit is a device with a light source. The optical system senses the density levels of the original and converts them into signals of different intensities. After amplification and processing, they are sent to the computer engraving unit. The computer control unit is a hardware device for data processing. It inputs the scanned information and converts it into digital data, which is then output as information for the engraving machine. The engraving unit consists of a sliding foot, an electro-engraving needle, and a scraper. The sliding foot supports the electro-engraving needle and enables it to move horizontally. The engraving head is the executive mechanism for engraving intaglio plates and is equipped with a diamond electro-engraving needle. The engraving range is between 105° and 140°. The scraper's function is to level the copper shavings left by the electro-engraving needle and remove them with a dust collection device.

Litian Century can produce and manufacture all kinds of diamond tools needed in the rotogravure industry.