source:Industry News release time:2022-12-12 Article author:yu Popular:pcb
Step 1: Obtain the PCB, first record the model, parameters and location of all components on paper, especially the direction of the diode, transistor and IC slot.
Step 2: Take out all the parts and remove the tin from the PAD hole. Clean the PCB with alcohol, then put it into the scanner, the scanner will scan with a slightly higher pixel for a clearer image. Then, lightly sand the top and bottom with a water screen until the copper film is shiny.
Step 3: Adjust the contrast and chromaticity of the canvas so that the part with copper film and the part without copper film form a strong contrast, and then turn the sub-image into black and white to check whether the lines are clear. If not, repeat this step. If it doesn't show up, save the picture as a black and white file top. bmp and bot.bmp formats.
Step 4: Convert the two BMP files to PROTEL files, and convert the two layers to PROTEL files. For example, PAD and VIA basically coincide by the position of the two layers, which shows that the previous steps are well done. If there is any deviation, repeat step three. Therefore, PCB duplication is a very patient job, because a small problem can affect the quality and matching degree of the copied PCB.
Step 5: Convert the top BMP to top. The PCB must be converted to the SILK layer, which is the yellow layer, then trace the line on the TOP layer and place the device according to the drawing in step 2. Remove the silk layer after painting. Repeat this step until all layers are painted.
Step 6: In PROTEL, call top. PCBs and robots. PCB, and combine them into one figure.
Step 7: Use a laser printer to print the top and bottom layers as a transparent film (1:1 ratio), place the film on the PCB, and compare whether it is correct. If correct, done.
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