Step by step to teach you how to chop PCB

The first step is to get a piece of PCB, first in the paper to record all elements of the model, parameters, as well as the location, especially the diode, the direction of the compressors pipe, IC the direction of the gap.It is better to digital camera two pictures from a location.

Second, tear down all device and the PAD holes in the tin.Using alcohol to clean PCB clean, then put into the scanner and start POHTOSHOP, knocked screen printing surface into color way, and print it out for later use.

The third step, water gauze paper will TOP LAYER and BOTTOM LAYER two layers of slight grinding, polishing to copper film bright, into the scanner, start PHOTOSHOP, knocked two layers respectively into in color mode.Note that the PCB inside the scanner put must be horizontal flat straight trees, or scanning image is unusable.

The fourth step, adjust the contrast of the canvas, the contrast, the copper film part of and not part of the copper film contrast, then the first figure to black and white, check whether the line is clear, if not clear, repeat this step.If clear, will survive for the black and white TOP. The BMP file format of BMP and BOT. BMP.

Fifth, the two BMP format into PROTEL format file, respectively in PROTEL transfer into two layers, such as a two layer of the PAD and the location of the VIA basic coincidence, suggests several steps before doing a good job, if there is a deviation, then repeat step 3.

Sixth, to the TOP.BMP into TOP.PCB, pay attention to into a SILK layer, the layer is yellow, then you are in the TOP layer is tracing, and drawing device according to the second step.After the draw will delete the SILK layer.

Step 7, the BOT.BMP into a BOT.PCB, pay attention to into a SILK layer, the layer is yellow, and then you in BOT layer tracing it.After the draw will delete the SILK layer.

Step 8, will TOP in PROTEL.PCB and BOT.PCB paged, into a graph with respect to OK.

Step 9, use laser printer to TOP LAYER, BOTTOM LAYER respectively printed on transparent film (1:1 ratio), put the film on the PCB, compare the errors, if yes, you're done.