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PCB Tech

How to use PCB copy software Bmp2?
2021-09-12
View:15
Author:Frank

  There are many kinds of PCB copy software, such as Bmp2 and CBR5.2 commonly used. The text focuses on the use of Bmp2 copy boardsoftware and software related instructions. The working project of Bmp2 is roughly: use a scanner to scan the circuit board image into the computer, and use the SLEC copy board tool to vectorize the dot matrix image data and convert it 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.

  1. PCB copy board software Bmp2 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 copying software Bmp2 scanning 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, the small board uses 600dpi, and the large board uses 300dpi or more. 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 to disk.
    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:
    ------------------------------------------------
    SLEC(R) BMP-to-TraxPCB Utility-Version 2.1
    Copyright(c) BEIJING SLEC(R) 1995-1996
    All rights reserved ---Howard Lee ---
    ------------------------------------------------
    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.

  2. pcb board

The meaning of each parameter of PCB copy software Bmp2 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 PCBvertical 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.