JPS62126311A - Apparatus for reading coordinates - Google Patents

Abstract

PURPOSE:To prevent a reading error, by checking whether the predetermined condition of the start and finish points of a wiring pattern is satisfied and automatically performing correction if there is a nonconformity. CONSTITUTION:After the pattern on one side of a printed pattern diagram is read, the pattern on the opposite side is read with a cursor 5. In this case, with respect to the start and finish points of the pattern, the pattern data of the previously read pattern is taken out from the grid table on a memory 9 and the checking of overshoot and undershoot is performed at first and, if there is an error, an alarm 15 outputs an alarm and correction data is instantaneously read from a cursor 5 on the basis of the pattern of the read result displayed on a display apparatus 12 to perform the indication of correction. Next, the pattern is checked and, if said pattern is overlapped with the pattern of the previously read side, the addition of a connection of a through-hole is performed to output said pattern to an MT apparatus 11.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to reading the coordinates of wiring patterns of printed wiring boards, etc., and particularly to prevent human reading errors and connections when reading the coordinates of wiring patterns. The present invention relates to a coordinate reading device that automatically adds through holes, etc., and is effective in reducing manual labor.

[Background of the invention]

As shown in Japanese Unexamined Patent Publication No. 59-201159, conventional coordinate reading devices, when reading all the coordinates of minute points on a grid that has been set up in advance on a drawing, have to accurately align the reading pin to the coordinates. I had to have it. Therefore, in order to accurately read a large amount of coordinate information, skill in cursor operation is required, and a large number of man-hours are required. In general, this work involves an extremely large number of reading errors, and the reliability of the output data decreases, so the number of man-hours required to correct the output data is also low. For this reason, various measures have been taken in the past, such as making the reading cursor smaller, improving @quantization, improving the coordinate reading resolution of the device, and normalizing the reading coordinates, but there is no fundamental solution. It wasn't.

[Purpose of the invention]

The purpose of the present invention is to prevent reading errors by checking whether predetermined conditions are satisfied for the start and end points of a wiring pattern when reading coordinates using a coordinate reading device, and automatically correcting any defects. Another object of the present invention is to provide an automatic reading pattern correction function to reduce the number of reading steps.

[Summary of the invention]

When reading the coordinates of a wiring pattern diagram of a printed wiring board, etc., a two-dimensional orthogonal coordinate system o-x, o-y is temporarily established, and the coordinate values of the starting point, corner point to corner point, and end point of the wiring pattern are read. Coordinate reading errors occur frequently due to errors in the reading drawings, or the reading point of the cursor of the coordinate reading device slightly deviating from the point where the coordinates should be read, resulting in reading the coordinates of adjacent points. Therefore, there are predetermined conditions for the starting point and ending point (i.e., the starting point and ending point must always have a mounting hole for the component and a connection through hole for connecting the front and back sides, etc.). When reading coordinates with a cursor, it is immediately checked to see if the conditions are met, and corrections are made to output accurate data.

[Embodiments of the invention]

An embodiment of the present invention will be explained below with reference to FIGS. 1 to 5.

First, the overall configuration of the coordinate reading device will be explained with reference to FIG.

The node configuration of the coordinate reading device includes a coordinate reading table 4 on which a reading drawing 13 is installed, a cursor 5 for designating the reading coordinate position r, monitoring of the cursor position, and performing various arithmetic processing based on the read data. , a control device 2 that performs all control for outputting to an output device, an output device (for example, MT device f) 11 that records the read results 16, and a display device 12 that displays the output results.

Next, we will explain the drawbacks that form the background of the present invention with reference to FIG. 2. In the conventional method, when reading the entire wiring pattern as shown in A and H in FIG. As a result of reading the pattern on the front side (solid line pattern) or the back side (broken line pattern), errors like a and b in FIG. 3 often occur. Furthermore, c in Fig. 3,
As shown in d, it was also necessary to separately read the connection through holes in the patterns on the front and back sides.

In this way, it is necessary to correct errors in the read data and read the connection through holes separately, which increases the amount of manual labor.

A detailed explanation of the present invention for this countermeasure will be given below.

First, in FIG. 1, the front or back pattern of the read drawing 13 on the coordinate reading table 4 is read with the cursor 5, passed through the entire input circuit 6 of the control device 2, set in the read data storage buffer 7, and calculated. Processing is performed in the circuit 8, and a 14ft grid table shown in FIG. 4 is stored on the memory 9.
The read data is set, the corresponding FLAG is set, and the read data is outputted to the MT device 11 of output device #3 through the output circuit 10, and at the same time, the read data is immediately displayed on the monitor on the display device 12. Similarly, as shown in FIG. 4, the lattice table stores information necessary for realizing the present invention in each lattice of the pattern effective area divided into a lattice shape within the printed wiring board 17. The start point and end point FLAG are FLAG for the grid coordinates of the starting point and end point of the maki where the pattern is read.
AGe set-t-ru.

Next, regarding the front and back LNE FLAGs, when the front and back sides are all read, FLAGa- is set to the corresponding grid table. Connection through hole FLAG
FLAG't is automatically set when the connection through hole is read directly or when the pattern on the front or back side is read.
- Set. Using the grid table above, check the wiring pattern and automatically set the connection through holes.

Next, the pattern gold between the opposite sides is read with the cursor 5, and the same processing is performed, but for the start point and end point, the pattern data of the read surface is retrieved from the grid table 14 in the memory, and first, the third Check all overshoots and undershoots in c and d shown in the figure. If there is an error, an alarm will be output from the alarm device 15 and all patterns of reading results displayed on the display device 12 will be checked. The correction data is immediately read from the canor and correction instructions are given.

Next, check the pattern C1d in Figure 3,
If it overlaps with the butter 7 on the previously read surface, a connection through hole is added and output to the MT device 11 through the output circuit.

In this way, in the present invention, the results of the reading patterns on the front and back sides are set in the grid table 14 on the memory,
The arithmetic circuit 8 checks the read shibata turn,
It provides reading pattern automatic correction functions such as overshoot and undershoot at the start point and end point of the M pattern, and automatic addition of connection through holes, making it possible to reduce the number of reading steps.

Similarly, FIG. 5 shows a simple processing flow of the present invention.

〔Effect of the invention〕

According to the present invention, when reading a large number of coordinate information on the drawing, the reading Il! It is possible to check 4 marks, and it can be read accurately and efficiently.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of an embodiment of the present invention, Fig. 2 is a reading target diagram, Fig. 3 is a reading result diagram, Fig. 4 is a grid table contents diagram, Fig. 5 is a processing flowchart, and Fig. The figure is a node configuration diagram of a general coordinate reading device.

Claims (1)

[Claims] 1. A device consisting of a coordinate reading device that reads a pattern on a printed circuit board, a control device that processes the read pattern, and an output device that displays and records data according to instructions from this control device. When reading the coordinates of the wiring pattern diagram, after reading the pattern on one side of the printed pattern diagram, when reading the pattern of the printed pattern diagram on the opposite side, check for reading errors in the pattern, and further check the pattern on the front and back sides. A coordinate reading device characterized by being equipped with a reading pattern automatic correction function for automatically adding connection through holes.