What is a printer? Working principle and operation steps
The working principle of the printing machine is simple, easy to operate, and the pressure is applied to make the original plate and the photosensitive plate closely fit, so that the image on the original plate can be accurately dried on the photosensitive plate by photochemical reaction. The printing machine is mainly composed of a light source device, an exposure chamber, a vacuum chamber, an electric appliance part, a machine base and the like. Printing machine operation steps: (1) The working environment temperature should be 0-40 °C, the relative humidity should be less than 80%; the working glass should meet the requirements of the first grade in GB 4871-1995. The effective working surface shall not have defects such as scratches, bubbles, mildew, etc.; the uniformity of illumination of the working surface shall not be less than 86%. (2) During the working process, the printing plate should maintain complete contact with the glass surface, and the vacuum system has a minimum vacuum adjustment range of 0-86.6 kPa; (3) The temperature rise of the working glass surface of the printing machine should be no more than 20 °C. Detection method: the exposure light source is placed in the normal working position, and the surface temperature of the working glass is measured by a point thermometer having a division value of not less than 0.5 °C. (4) Exposure control system The plate exposure machine with timer should have a repeated exposure time error of less than ±1%. Detection method: measuring the actual exposure of the printing machine for 5 minutes with a stopwatch 3 times, recording the actual exposure time Ti of the printing machine; (5) The requirements of the light source of the printing machine should be selected according to the photosensitive characteristics of the PS plate. The photosensitive range of the PS plate is generally 280-450 nm, because the film base of the film and the glass of the printer are below the wavelength of 320 nm. Has a stronger absorption. (6) The printing machine should work reliably under the condition of ±10% fluctuation of the power supply voltage; the working noise should be less than 70dB; the insulation resistance between the short-circuited power circuit and the protection circuit conductor should not be less than 1MΩ; Reliable UV protection. Article source address: http:// Wire Mesh Fence,Wire Netting,Mesh Fencing,Welded Mesh Fencing Anping County Hua Guang Wire Mesh Production Co.,Ltd , https://www.hgwirefence.com