PCB Technical - Bmp2PCB copy board software introduction

The SLEC-PCB scanning copy board system uses a scanner to scan the image of the circuit board into the computer. Using the SLEC copy board tool, the dot matrix image data is vectorized and converted into a data format that can be recognized by the CAD software Protel, resulting in 1:1 Copy the base map of the board, and finally copy the circuit board in Protel according to the base map. The system uses dot matrix data vectorization technology, which greatly improves the efficiency and accuracy of circuit board copying.

One, system configuration

Hardware: Computer: models above 486DX66, memory above 8M, support display mode above 256 colors;

Scanner: Optical resolution 300X600 or more, color flatbed scanner;

Software: SLEC copy board software: bmp2pcb.exe

Scan operation interface: photoshp

Circuit board design software: Protel for DOS or Protel for Windows

Operating system: Windows 3.2 or Windows 95, 98

2. PCB scanning and copying operation

1. Scanning: first install the scanner, then start the photoshp software, run the TWAIN command under Import under the File menu, start the scanner, and adjust the resolution according to the size of the circuit board, generally 600dpi for small boards, 300dpi or more for large boards small. After the scanning is completed, exit the scanning software and make appropriate adjustments in photoshp, including adjusting the plate position, contrast, and sharpness, and finally turn it into a black and white one-bit bmp image, and save it.

2. Data conversion: run bmp2pcb.exe program under DOS.

How to use bmp2pcb:

In the DOS command line, type bmp2pcb without parameters to display help information

C:\SLECAD>bmp2pcb[Enter]

Then displays:

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SLEC(R) BMP-to-TraxPCB Utility-Version 2.1

Copyright(c) BEIJING SLEC(R) 1995-1996

All rights reserved ---Howard Lee ---

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USAGE:BMP2PCB.EXE [XRes] [YRes] [Attr] [Layer] [Ratio]

Bitmap(Black&White) file name to be converted

Trax PCB file name to be convered to

[XRes] X (Horizontal) resolution(Default=1000)

[YRes] Y (Veritical) resolution(Default=1000)

[Attr] 0(D)-Normal 1-XMirror 2-YMirror 4-Negative

[Layer] Protel-PCB layer number[1-13]

[Ratio] Protel-PCB Skew Ratio[-1,1]

Among them, the parameters in angle brackets <> are required options, and the parameters in square brackets [] are optional.

The meaning of each parameter is as follows:

The name of the BMP file to be converted, which must be 1bit (black and white);

AutoTRAX file name after conversion;

[XRes] The resolution in the X direction of the BMP file (the default value is 1000); (must be the same as the resolution used when scanning)

[YRes] The resolution of the BMP file in the Y direction (the default value is 1000); (must be the same as the resolution used when scanning)

[Attr] 0(D)-Normal 1-X-direction mirroring 2-Y-direction mirroring 4-positive and negative reverse

[Layer] Protel AutoTRAX PCB layer number [1-13]

1-- :Top Layer

2-5 :1 Mid layer -4 Mid layer

6-- :Bottom layer

7-- :Top Overlay

8-- :Bottom Overlay

9-- :Ground Plane

10--:Power Plane

11--:Board layer

12--:Keep Out layer

13--:Multi layer

[Ratio] Protel PCB vertical correction coefficient. This coefficient is set to correct the vertical error of the scanner, and it is generally not necessary.

After the conversion is completed, it cannot be directly used for the optical drawing board. On this basis, it must be copied again using Protel software.