East guide science and technology on the copy board series of steps: copy board 【PCB copy board】
Update date：2012-6-25
Copy board tool to talk about over, we ought to talk about how to copy board, which is why we want to say today to tell you how to copy board.
PCB copy board technology implementation process is simple, the board is the first to take down the board to scan the records detailed component location, and then to remove the components made of materials (BOM), and arrange for the procurement of materials, empty plate scanned into the picture by the copy board software processing to restore the pcb board map file, then the PCB file sent to plate factory system board, the board made after the procurement of components soldered to the PCB board made, then the circuit board test and debugging can be.
The specific steps are as follows:
The first step, to get a piece of the PCB, the first record on paper all the vitality of the model parameters, and location, especially in the direction of the diode, the direction of the three tubes, IC gap. Best digital camera photos of two vitality location. Pcb board is getting advanced above the diode transistor and some do not pay attention to not see.
The second step, remove all devices, remove the tin PAD Kong. The PCB with an alcohol wash, and then placed in the scanner when the scanner needs to slightly increase the number of scanned pixels, in order to get a clearer image. Water paper yarn a slight polish, top and bottom copper films polished to shine into the scanner, start PHOTOSHOP, two layers were swept into the color. Note the PCB placed in the scanner must be smooth vertical and horizontal, or scanned images can not be used.
The third step is to adjust the contrast of the canvas, shading, so that a strong part of the copper film and copper film part of the comparison, then the diagram is converted to the black and white, check the lines are clear, if it is not clear, repeat this step. If clear, the survival TOP BMP and BOT of BMP for the black and white BMP format file, if it is found that the graphics can also use PHOTOSHOP to repair and amend.
Fourth step, the two BMP format file into PROTEL format transferred PROTEL in two layers, such as two layers of the PAD and VIA's position essentially coincident, indicating that the first few steps to do well, if deviation, then repeat the third step. So pcb copy board is a very patient, because of little issues will affect the matching degree of quality and copy board.
The fifth step, the TOP layer of BMP into the TOP the PCB, Note to be converted to the SILK layer is that layer of yellow, and then it wants in the TOP layer of scanning lines, and placed under the second step of drawing devices. Unfinished after the SILK deleted. Repeated until the drawing all the layers.
Step 6, in PROTEL will TOP PCB and BOT of the PCB, transferred, or as a graph on OK. Step 7, a laser printer TOP LAYER LAYER BOTTOM. Print to transparencies (1:1 ratio), the film into a piece of the PCB, a comparison is wrong, and if yes, you're done .
An original board copy board was born, but this is only half finished. Also tested electronic technical performance of the test copy board is not the same as the original board. If it really is complete.
Note: If the multilayer also carefully polished to the lining of the inside, while repeating the third to the fifth step of copy board steps, of course, the naming of the graphics, according to the number of layers, usually double-sided copy board simple than the multilayer, multi-layer copy board is prone to a bit inaccurate, multilayer copy board should be particularly careful and cautious (in which the internal vias and vias are prone to problems).
The double sided copy plate method:
The upper and lower surface of the scan circuit board, kept out of the two BMP picture.
(2) Open the copy board the software Quickpcb2005 point "file" to open the base map to open a scanned picture. PAGEUP enlarge the screen, see the pad, place a pad, PP, see the line PT traces ... like child drawings, painted in the software again, "Save file to generate a B2P.
3 and then point to "file" to open the base map to open another layer scanning color pictures;
Then "File" "Open, open the the B2P file previously saved, we can see just copied a good board, stacked on top of this picture - with a PCB board, hole in the same position, only the connections . So we press the "Options" - "Layer Settings", where close to display the top line and screen printing, leaving just the multi-layer vias.
5 top-level through-hole and the bottom picture on the hole in the same location, now we like the childhood drawings, like delineate the bottom line on it. And then "Save" - when the B2P have the top and bottom two layers of information.
6. File Export for PCB file, you can get a PCB has two data files can then change the board or schematic or sent directly to the PCB plate factory production.
The multilayer copy plate method:
In fact, the four-layer board copy board is to repeat the copy two pairs of panels, six-story is to repeat the copy three pairs of panels ..., multi-layer was daunting, because we can not see the alignment of its internal. A sophisticated multilayer, how we see the inner universe? - Stratification.
Tiered approach, syrup corrosion tool stripping, etc., but it is easy to layer points too much loss of information. Experience tells us that sanding is the most accurate.
When we copied the top of the bottom of the PCB, are generally the way of sanding worn surface shows the inner; ordinary sandpaper, sandpaper hardware stores sell tile the PCB, then press and hold the sandpaper on the PCB uniform friction (If the board is very small, can also be tiled sandpaper with a finger to press and hold the PCB in the sandpaper on the friction). The point is to be paved, so can be worn uniform.
Silk screen with the green oil generally a wipe out, copper, and copper should be good to rub a few. In general, the board of Bluetooth a few minutes to rub a good memory about ten minutes; of course, the big effort, less time spent; effort flower time will be a little more.
The grinding plate is layered with the most popular program is the most economic. We can find a block of abandoned PCB test, in fact, wear plates no technical difficulty, just a little boring to spend some effort, nothing to worry about will board worn grinding fingers Oh.
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