JP2840684B2 - Coordinate data calculation device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinate data calculating device that calculates coordinate data indicating a component mounting position on a board on which electronic components are mounted.

2. Description of the Related Art When electronic components are mounted on a printed circuit board (hereinafter simply referred to as a substrate) using an electronic component mounting apparatus, it is necessary to input coordinate data of a component mounting position. Conventionally, coordinates have been input using a digitizer. In that case, the operator places the design drawing of the board on the tablet of the digitizer. In the design drawing, component outlines are shown at the mounting position of each component. Next, the operator determines the center of the part by visually checking the outline of the part. Then, the cursor of the digitizer is visually adjusted to the position, and the cursor is clicked. Thus, the digitizer outputs the coordinate data of the position, and the coordinate data is stored as the component mounting position.

[Problems to be Solved by the Invention] Therefore, in the related art, since the center of the component is determined visually and the coordinates are used as the component mounting position, a visual error is inevitably generated, and the component is not mounted at a correct position. . In addition, the operator uses nerves for eye measurement, so that the operator is apt to be tired and the input work efficiency is reduced.

The present invention has been made in view of the above circumstances, and when inputting coordinate data of a component mounting position using a board drawing,
It is an object of the present invention to provide a coordinate data calculation device capable of improving input accuracy.

Means for Solving the Problems In order to solve the above problems, the present invention is a coordinate data calculation device used in a component mounting device for mounting an electronic component on a rectangular land formed on a substrate, Coordinate data output means for designating a point on the land outline shown in the board drawing and outputting coordinate data of the point; storage means for storing at least two coordinate data output from the coordinate data output means; Calculating means for calculating an average value of X coordinate data and an average value of Y coordinate data with respect to the coordinate data stored in the storage means to obtain coordinate data of a center point of the rectangle specified by at least two points; Mounting position storage means for storing the coordinate data of the center point obtained by the calculation means as coordinate data indicating the component mounting position.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a circuit configuration of a coordinate data calculation device to which the present invention is applied. In FIG. 1, reference numeral 1 denotes a digitizer for inputting coordinates. The digitizer 1 is, for example, an electromagnetic induction type, but may be another type. The digitizer 1 includes a tablet having an XY coordinate plane and a cursor or a stylus pen for designating an arbitrary point on the tablet. The coordinate data of the point designated by the cursor or the stylus pen is transmitted to the CPU 2. Output.

The CPU 2 executes various processes based on a control program stored in a program memory (not shown), and is connected to a keyboard 3, a register unit 4, and a mounting position memory 5. The keyboard 3 has various keys, and outputs a key input signal corresponding to the key operation to the CPU 2.

The register unit 4 is a group of registers for storing the coordinate data output from the digitizer 1, and includes a register x _min for storing the minimum value of the X coordinate data, a register y _min , X for storing the minimum value of the Y coordinate data. Register x _max for storing the maximum value of the coordinate data, register y _max for storing the maximum value of the Y coordinate data, register x for storing the input X coordinate data, registers y and X for storing the input Y coordinate data A register x _m for storing the average value of the coordinate data and a register y _m for storing the average value of the Y coordinate data are provided.

The mounting position memory 5 stores coordinate data of the component mounting position corresponding to each of the plurality of electronic components mounted on the board.

 Next, the operation of the above embodiment will be described.

FIG. 2 is a diagram showing an arrangement relationship and coordinates between the chip electronic component 6 mounted on the substrate and the lands 7,8. land
Reference numerals 7 and 8 denote rectangular electrodes formed of copper foil on a printed circuit board and to which the chip electronic components 6 are soldered. in this case,
As shown in FIG. 2, the chip electronic component 6 is mounted at the center between the lands 7 and 8, and the component center of the chip electronic component 6 is a point P.

In this case, an example will be described in which the coordinates of four points (four corners) a to d of the lands 7, 8 are input by the digitizer 1 to calculate the coordinate data of the component center P. Fig. 3 shows four points a to lands 7 and 8
FIG. 6 is a diagram illustrating d and coordinate values of a component center P.

The coordinate input by the digitizer 1 is performed as follows. First, a board design drawing is placed on the tablet of the digitizer 1. Next, using a cursor (which may be a stylus pen), the lands 7, 8 shown in the design drawing of the substrate are used.
The coordinates of four points a to d on the outer shape are sequentially input. Before that, a start key provided on the keyboard 3 is operated to instruct the start of coordinate input.

Thus, the processing shown in the flowchart of FIG. 4 is started. In step S1, each register x _min , y _min , x _max , y
Initialize _max . In this initial setting, register x _min ,
The maximum value (∞) of the coordinate data is stored in y _min, and the minimum value (−∞) of the coordinate data is stored in registers x _max and y _max .

Next, in step S2, the cursor of the digitizer 1 is positioned on the point a shown in FIG. 2, and an end code of "OFF" is input with the cursor. Accordingly, the digitizer 1 outputs coordinate data corresponding to the coordinates (X, Y) of the point a to the CPU 2. C
The PU2 inputs the coordinate data output from the digitizer 1 and stores them in the registers x and y, respectively. In this case, the coordinates of the point a are (100, 100) as shown in FIG.

In the following step S3, the content "100" of the register x is compared with the content "100" of the register _xmax . Now, x> x _max
And the process proceeds to step S4. If the step
If it is determined in step S3 that x ≦ x _max , the process proceeds to step S5 without executing step S4.

In step S4, the content "100" of the register x is written to the register x _max . This is a process for updating the maximum value of the X coordinate data. After the execution of step S4, the process proceeds to step S5.

In step S5, the content “100” of the register x is compared with the content “∞” of the register x _min . Now, it is determined that x <x _min , and the process proceeds to step S6. If x in step S5
If it is determined that ≧ x _min , the process proceeds to step S7 without executing step S6.

In step S6, the content “100” of the register x is written to the register x _min . This is a process for updating the minimum value of the X coordinate data. After the execution of step S6, the process proceeds to step S7.

The processing in step S7 compares the content “100” of the register y with the content “−∞” of the register y _max . Now, y> y _max
And the process proceeds to step S8. If the step
If it is determined in step S7 that y ≦ y _max , the process proceeds to step S9 without executing step S8.

In step S8, the content "100" of the register y is written to the register y _max . This is a process for updating the maximum value of the Y coordinate data. After the execution of step S8, the process proceeds to step S9.

In step S9, the content “100” of the register y is compared with the content “∞” of the register y _min . Now, it is determined that y <y _min , and the routine proceeds to step S6. If y in step S9
If it is determined that ≧ y _min , the process proceeds to step S11 without executing step S10.

In step S10, the content "100" of the register y is written to the register y _min . This is a process for updating the minimum value of the Y coordinate data. After the execution of step S10, the process proceeds to step S11.

Step S11 is an average value calculation process for calculating the average value of the coordinate data. First, the operation result “2” is obtained by adding the content “100” of the register x _max storing the maximum X coordinate data and the content “100” of the register x _min storing the minimum X coordinate data.
00 ”is divided by“ 2 ”, and the calculation result“ 100 ”is averaged by X
Write to the register x _m as coordinate data. Next, the maximum Y
Contents "100" of the register y _max storing the coordinate data and contents "100" of the register y _min storing the minimum Y coordinate data
Is divided by “2”, and the operation result “100” is set as a register y _m as average Y coordinate data.
Write to. That is, when the coordinates of the point a are input, the average X coordinate data is “100” and the average Y coordinate data is “100”.

In the next step S12, it is determined whether the end code is "ON" or "OFF". In this case, since the end code of “OFF” was input in the processing of step S2, the coordinate input is continued, and
Return to S2. In step S12, the end code is "O
If it is determined to be "N", the processing of FIG. 4 ends.

Next, in step S2, coordinate data of the point b is input. That is, the cursor of the digitizer 1 is positioned at the point b shown in FIG. 2, and an end code of "OFF" is inputted with the cursor.
Accordingly, the digitizer 1 outputs coordinate data corresponding to the coordinates (X, Y) of the point b to the CPU 2. The CPU 2 inputs the coordinate data output from the digitizer 1 and stores them in the registers x and y, respectively. In this case, the coordinates of the point b are (100, 200) as shown in FIG.

In the following step S3, the content “100” of the register x is compared with the content “−∞” of the register x _max . Now, x ≦ x _max
And the process proceeds to step S5.

In step S5, the content “100” of the register x is compared with the content “100” of the register x _min . In this case, x
It is determined that ≧ x _min and the process proceeds to step S7.

In step S7, the content of the register y “200” and the register y
Compare the content of _max with "100". Now, it is determined that y> y _max , and the process proceeds to step S8.

In step S8, the content “200” of the register y is written to the register y _max, and the maximum value of the Y coordinate data is updated.

In the next step S9, the content "200" of the register y is compared with the content "100" of the register _ymin . In this case, y
It is determined that ≧ y _min , and the process proceeds to step S11.

In step S11, the operation result "200" obtained by adding the content "100" of the register x _{max and} the content "100" of the register x _min is divided by "2", and the operation result "10
Written 0 "to the register x _m. Next, the operation result “300” obtained by adding the content “200” of the register y _{max and} the content “100” of the register y _min is divided by “2”, and the operation result “150” is obtained.
Is written to the register y _m . That is, when the coordinates of the point b are input, the average X coordinate data is “100” and the average Y coordinate data is “150”.

In the next step S12, it is determined that the end code is "OFF", the coordinate input is continued, and the process returns to step S2.

Next, in step S2, coordinate data of the point c is input. That is, the cursor of the digitizer 1 is set to the point c shown in FIG. 2, and the end code of "OFF" is inputted by the cursor.
As a result, the digitizer 1 outputs to the CPU 2 coordinate data corresponding to the coordinates (X, Y) of the point c. The CPU 2 inputs the coordinate data output from the digitizer 1 and stores them in the registers x and y, respectively. In this case, the coordinates of the point c are (200, 100) as shown in FIG.

In the following step S3, the content "200" of the register x is compared with the content "100" of the register _xmax . Now, x> x _max
And the process proceeds to step S4.

In step S4, the content “200” of the register x is written to the register x _max, and the maximum value of the X coordinate data is updated.

In the next step S5, the content “200” of the register x is compared with the content “100” of the register x _min . In this case, x
It is determined that ≧ x _min and the process proceeds to step S7.

In step S7, the content "100" of the register y is compared with the content "200" of the register _ymax . Now, y ≦ y
It is determined to be _max , and the process proceeds to step S9.

In step S9, the content “100” of the register y is compared with the content “100” of the register y _min . In this case, y ≧ y
_It is determined to be _min, and step S11 is executed.

In step S11, the operation result "300" obtained by adding the contents "200" of the register x _{max and} the contents "100" of the register x _min is divided by "2", and the operation result "15"
Written 0 "to the register x _m. Next, the operation result “300” obtained by adding the content “200” of the register y _{max and} the content “100” of the register y _min is divided by “2”, and the operation result “150” is obtained.
Is written to the register y _m . That is, when the coordinates of the point c are input, the average X coordinate data is “150” and the average Y coordinate data is “150”.

In the next step S12, it is determined that the end code is "OFF", the coordinate input is continued, and the process returns to step S2.

Coordinate input of point d In step S2, coordinate data of point d is input as described above. That is, digitizer 1 is placed at point d shown in FIG.
Move the cursor of. Next, by inputting a point d, four points a to d
Is completed, enter the "ON" end code with the cursor. As a result, the digitizer 1 outputs to the CPU 2 coordinate data corresponding to the coordinates (X, Y) of the point d. CPU2
Inputs the coordinate data output from the digitizer 1,
These are stored in the registers x and y, respectively. In this case, the coordinates of the point d are (200, 200) as shown in FIG.

In the next step S3, the content “200” of the register x is compared with the content “200” of the register x _max . In this case, x
It is determined that .ltoreq.x _max and the process proceeds to step S5.

In step S5, the content “200” of the register x is compared with the content “100” of the register x _min . in this case,
It is determined that x ≧ x _min and the process proceeds to step S7.

In step S7, the content "200" of the register y is compared with the content "200" of the register _ymax . Now, it is determined that y ≦ y _max , and the process proceeds to step S9.

In step S9, the content “200” of the register y is compared with the content “100” of the register y _min . In this case, y
It is determined that ≧ y _min, and step S11 is executed.

In step S11, the operation result "300" obtained by adding the contents "200" of the register x _{max and} the contents "100" of the register x _min is divided by "2", and the operation result "150" is stored in the register. Write to x _m . Next, the contents of the register y _max "20
The arithmetic result “300” obtained by adding “0” and the content “100” of the register y _min is divided by “2”, and the arithmetic result “150” is written to the register y _m . That is, when the coordinates of the point d are input, the average X coordinate data is “150” and the average Y coordinate data is “1”.
50 ".

In the next step S12, it is determined whether the end code is "ON" or "OFF". In this case, since the "ON" end code has been input in the process of step S2, the coordinate input is terminated, and the process of FIG.

As a result, the average value of the coordinate data stored in the registers x _m and y _m is written to the mounting position memory 5 as mounting position data of the component. Hereinafter, in the same manner as described above, coordinates of a land outline point of each electronic component mounted on the board are input using the digitizer 1, a component center is calculated based on the coordinates, and the coordinate data is used as coordinate data indicating the component mounting position. Is written in the mounting position memory 5.

In the description of the above embodiment, the coordinates of the four points a to d are input. However, when the points a and d on the diagonal of the lands 7 and 8 are input, and when the points b and c are input similarly, The center point P can be obtained even by inputting two points. That is, when four points are input, the points need not be at the four corners of the lands 7, 8 but may be any points located on the four sides.

[Effects of the Invention] As described above, according to the present invention, the coordinate data of the component mounting position on the board can be calculated with higher accuracy than in the past, the component mounting accuracy is improved, and the efficiency of the input operation by the operator is improved. Can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration, FIG. 2 is a diagram showing an arrangement relationship and coordinates between a chip electronic component and a land, and FIG. FIG. 4 is a flowchart showing the coordinate values of the component center, and FIG. 4 is a flowchart showing the operation. 1 digitizer, 2 CPU, 3 keyboard, 4
... Register part, 5 ... Mounting position memory, 6 ... Chip electronic parts, 7,8 ... Land.

Claims (1)

(57) [Claims] 1. A coordinate data calculating device used in an electronic component mounting device for mounting an electronic component on a rectangular land formed on a substrate, wherein a point on a land outline shown in a substrate drawing is designated. And coordinate data output means for outputting coordinate data of the point, storage means for storing coordinate data of at least two points output from the coordinate data output means,
Calculating means for calculating an average value of the X coordinate data and an average value of the Y coordinate data for the coordinate data stored in the storage means to obtain coordinate data of a center point of the rectangle specified by the at least two points; And a mounting position storing means for storing the coordinate data of the center point obtained by the calculating means as coordinate data indicating a component mounting position.