JPH0230527B2 - ZAHYOJIDOYOMITORIKINIOKERUSHIHYOGATSUCHISOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an index matching device in a coordinate reader.

After automatically reading the XY coordinate values of, for example, a through-hole mark on the original drawing of a printed circuit board on the table using an automatic coordinate reader, if you want to specify the hole diameter etc. for the desired through-hole mark, use the ITV camera. The head of the automatic coordinate reader mounted on the tower is moved in the XY coordinate axes directions on the table by manually operating the switch on the console, and the center of the index reflected on the cathode ray tube of the monitor TV on the console is aligned with the desired through-hole mark. The XY coordinate values of the head at this time are input into the controller by pressing the record switch to specify the desired through-hole mark, and the data such as the hole diameter of this through-hole mark is input to the controller by keyboard operation. I'm inputting it. However, although the head can be easily controlled to move close to the desired through-hole mark, when the center of the indicator is precisely aligned with the center of the through-hole, the head may move too far or too close, and manual operation is required. Aligning the index by operating a switch is extremely difficult and time consuming. Similar to the above, except for an automatic coordinate reader that automatically reads the center point of a mark, it is possible to manually switch the reading head to
The same is true for manual coordinate readers that are controlled in the direction of the mark to read the coordinates of the center point of the mark and record the values sequentially in memory. Therefore, the present invention
To provide an index matching device in which the movement of the head is automatically switched when the head is positioned near a desired mark by manual switch operation, and the center of the index automatically matches the center of the desired mark. The purpose is to

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

2 is a reading head attached to the carrier 4;
It is equipped with 6 ITV cameras and 8 line scanner cameras. When the X pulse motor is driven by a command from the controller 10, the X cursor 12 moves along the X rail 14, and when the controller supplies pulses to the Y pulse motor, the carrier 4 moves along the Y rail 16. It is configured to be moved around. The X cursor 12 and the carrier 4 are automatically driven by the controller 10, the drawing on the table 18 is scanned by the scanner camera 8, and this scanning output is processed in the controller 10 to form white circles or white circles on the black background of the drawing. It is configured to automatically read the XY coordinate values of the center point of the black circle mark on a white background, file it in the storage device of the controller 10, and output the data to the output device. Meanwhile, table 18 is shown by ITV camera 6.
As the image of the above drawing shows in Figure 3, the lens system 2
2, half mirror 24, reflecting mirror 26, lens system 2
8 and the index 32 of the index board 30 arranged in front of the ITV camera 6, the display is configured to be displayed on the screen of the monitor television receiver 34. Incidentally, the indicator 32 is constituted by a cross-shaped black line drawn on the transparent plate 30. Note that the XY coordinate values of the center of the index 32 on the table 18 and the XY coordinate values of the center of the light detection unit 36 of the scanner camera 8 on the table are configured to be the same. Operation console 3 adjacent to table 18
8 is provided with a switch group 40 consisting of a +X switch, a -X switch, a +Y switch, and a -Y switch. When the +X switch in the switch group 40 is pressed, a plus direction pulse is supplied to the X pulse motor, and the Y rail 16 moves along the X rail 14 in the direction of the +X coordinate axis. When the -X switch is pressed, the Y rail 16 moves in the direction of the -X coordinate axis. X rail 14 of the X cursor 12, 12,
14 and the amount of movement of the carrier 4 along the Y rail 16 are counted by a current position counter 42 (see FIG. 4).

Next, when the indicated point B on the table 18 at the center of the index 32 is positioned near the desired mark _A1 on the drawing on the table 18, the head 2 is automatically driven and the center of the index 32 is placed at the mark A1. Controller 1 that automatically matches the center of A ₁
The circuit of 0 will be explained with reference to FIG.

Reference numeral 44 denotes a coordinate point file memory, into which the XY coordinate values of the center points of each mark on the drawing automatically read in advance by the line scanner camera 8 are inputted in scanning order. 42 is a current position counter, 46 is a subtraction circuit, and 48 is a range indicating device, which sets the absolute values of desired numerical values △X ₁ and △Y ₁ ;
A desired range L ₁ (see FIG. 9) is set in the XY coordinate direction from the coordinate values of the center point B of the index 32. This range _L1 may be rectangular or circular.
50 is an incremental file memory, and the range L ₁
The increase amounts △X ₂ and △Y ₂ are stored in memory. 82
is an adder, 54 is a range counter, 56 is a comparison circuit, 58 is an arithmetic circuit, 60 is a check controller, 6
2 is a movement ON/OFF switch, 64 is a motor movement command circuit, 66 is a difference comparison control circuit, 68 is a difference file memory, 70 is a coordinate point file memory,
72 is a comparison/discrimination circuit, 74 is a minimum difference value file memory, 76 is a minimum difference value coordinate file memory,
78 is an arithmetic unit, 80 is a memory circuit, and these are connected as shown. In the above embodiment, the ITV camera 6 constitutes a projector, and the surface of the cathode ray tube of the image receiver 34 constitutes a projection surface, but the projector and projection surface may be of various types other than the ITV camera and the cathode ray tube. You can do this by using
Further, the comparison circuit 56 and the within-range counter 54 constitute means for calculating whether or not a desired mark of the drawing on the table 18 is within the range _L1 .
Subtraction circuit 46 and memory circuit 80 or arithmetic circuit 5
8, difference file memory 68, coordinate point file memory 70, difference comparison control circuit 66, comparison and discrimination circuit 72, minimum difference value file memory 74, minimum difference value coordinate file memory 76, and arithmetic unit 78.
Index 3 from the XY coordinate value A of the mark within the range L ₁
The motor movement command circuit 64 constitutes a means for calculating positional deviation values △x ₁ , △y ₁ of the index 32 with respect to the target mark by subtracting the XY coordinate value B of the center point of 2.
constitutes a means for automatically driving the head 2 in a direction in which the positional deviation value becomes zero based on the positional deviation value.

Next, the XY of the center point of all the predetermined marks already
The operation of aligning the center B of the index 32 with a desired mark, for example _A1 , on a drawing such as an original drawing of a printed circuit board whose coordinate values have been automatically read will be described with reference to FIG.

First, operate the switch group 40 on the console to bring the head 2 near the target mark _A1 .
At this time, it is assumed that the marks A ₁ , A ₂ , and A ₃ are located within a predetermined range L ₁ from the center of the index 32. In this state, the count value B of the counter 42 is input to the subtraction circuit 46. The subtraction circuit 46 receives the coordinate values A of all marks in the coordinate point file memory 44.
is called, and the circuit 46 subtracts B from A -
B is performed, and the subtracted values Δx and Δy are sequentially input to the comparison circuit 56. The comparison circuit 56 calculates the above subtracted value △
If the absolute values of x and △y are smaller than △X ₁ and △Y ₁ ,
That is, when the mark is within the range _L1 , one pulse is output. Since the marks A ₁ , A ₂ , A ₃ are within the range L ₁ , the comparison circuit 56 outputs three pulses and the counter 54 counts. On the other hand, the arithmetic circuit 58
is √ based on the subtracted values △x and △y of the subtraction circuit 46
Calculate △X ² + △y ² =C. This value of C indicates the straight-line distance between each mark and point B. This C
The values are sequentially sent to the differential file memory 68. At the same time, the XY coordinate values of each mark corresponding to the C value are sent to the coordinate point file memory 70. When a pulse is input from the comparator circuit 56, the memories 68 and 70 store only the value of C corresponding to the pulse and the XY coordinate values corresponding thereto. 58 and the data from memory 44 are cancelled. Therefore,
The values C ₁ , C ₂ , C ₃ of each C of A ₁ , A ₂ , A ₃ are stored in the memory 68
and corresponding XY coordinate values A ₁ , A ₂ , A ₃ stored in and corresponding to C ₁ , C ₂ , C ₃ as address signals
is stored in the coordinate point file memory 7 along with C ₁ , C ₂ , and C ₃
Stored as 0. When all the marks in the coordinate point file memory 70 have been checked, a check completion signal is sent from the check controller 60 to the motor movement command circuit 64 and the counter 54. As a result, the counter 54 is controlled by the difference comparison control circuit 66.
The circuit 66 sequentially sends the contents C ₁ , C ₂ , C ₃ of the differential file memory 68 to the comparison/determination circuit 72 . The comparison/determination circuit 72 determines the magnitude of C ₁ , C ₂ , and C ₃ and inputs the minimum value C ₁ to the minimum difference file memory 74 . The minimum value C ₁ is memory 74
When input to the file memory 74, this _C1 is input to the file memory 74.
Coordinate point file memory 7 as an address signal from
0, and the signal A ₁ corresponding to address C ₁ is taken out from the file memory 70 and input into the minimum difference coordinate file memory 76 . here
The _A1 signal is transferred from the file memory 76 to the arithmetic unit 78.
Here, the A ₁ value is subtracted from the B value (A ₁ −B). These subtracted values Δx ₁ and Δy ₁ are sent to the motor movement command circuit 64 as motor movement amounts. The motor movement command circuit 64 operates the movement ON/OFF switch 6 on the condition that the difference check end signal from the difference comparison control circuit 66 and the check end signal from the check controller 60 are input.
When receiving the ON signal of 2, the position deviation signal △x ₁ , △
y ₁ is output to the XY pulse motor movement circuit (not shown), and this output automatically moves head 2 by △x ₁ and △y ₁ minute, so that the center of index 32 coincides with point A ₁ . . In this state, press the record switch on the console 38 to input the XY coordinate values of point B, that is, _one point A, into the controller, and press the record switch on the console 38.
Operate the keyboard to input data such as the hole diameter of point _A into the controller.

Note that when only one mark A ₁ exists within the range L ₁ , the output pulse of the comparator circuit 56 generates position deviation signals △x ₁ , △y ₁ for that mark with respect to point B.
is stored in the memory circuit 80. counter 54
When the check completion signal is input to the counter 54, the counter 54 outputs a drive signal to the motor movement command circuit 64. The motor movement command circuit 64 turns on/off the movement on the condition that the above drive signal is input.
When the start signal is received from the OFF switch 62, the motor movement amount signal of the contents △x ₁ and △y ₁ of the memory 80 is output to the XY pulse motor drive circuit, so that the center of the index 32 is located within the range L _1. Automatically matches the center point of one mark A ₁ . In addition, move
Even if the ON/OFF switch 62 is not particularly provided, the motor movement command circuit 64 can be set to output a motor drive signal in response to the drive signal of the counter 54 or the motor movement command signal from the difference comparison control circuit 66. good.

Incidentally, if the target mark does not fall within the range _L1 , the counter 54 outputs a zero count signal to the adder 82 based on the check end signal, and then resets. The adder 82 receives this signal and adds increment values △X ₂ and △Y ₂ to the values △X ₁ and △Y ₁ of the range indicating device 48, so that the range L ₁ is the range.
Then, the _above -described check operation is performed on all marks so that the target mark falls within the increased range _L2 . At this time,
When the counter 54 outputs a zero count state again, the adder 82 further adds △X 2 and △Y ₂ to each of △X ₁ + △X ₂ and △Y ₁ + △ _{Y 2 ,} so that the range L ₂
increase. If the mark does not fall within the range even after repeating this operation a predetermined number of times, move head 2.
is moved by a switch operation to bring the index 32 closer to the target mark.

Next, another embodiment will be described with reference to FIG.

When the count value of the in-range counter 54 is zero, an addition instruction signal is input to the arithmetic unit 82', and the arithmetic unit 82' receives this signal and starts the range instruction device 48.
The file memory 5 increases or decreases in the values of △X ₁ and △Y ₁ .
The data ΔX ₂ and ΔY ₂ within 0' are added to increase the range L ₁ . This operation is repeated in the manner described above until a mark appears within range L. Furthermore, if a mark other than the target mark appears within the range _L1 and the in-range counter 54 counts two or more pulses, the arithmetic circuit 82'
Increase/decrease file memory 5 to the value of △X ₁ , △Y ₁ of 8
The data ΔX ₂ and ΔY ₂ within 0′ are subtracted, thereby decreasing the range L ₁ . This operation is repeated in the same way as above until there is only one mark within the range. The in-range counter 54 outputs a 1 count signal to the motor movement command circuit 64, and the switch 62 is activated.
When turned ON, the head 2 automatically moves so that the center of the index 32 coincides with the center of the mark within the range _L1 .

Next, another embodiment will be described with reference to FIG.

If the in-range counter 54 counts two or more pulses, the subtracter 82'
Decrement file memory 5 to the value of △X ₁ , △Y ₁ of 8
The data ΔX ₂ and ΔY ₂ within 0′ are subtracted, thereby decreasing the range L ₁ . Next, perform a check operation on all marks, and as a result, there are 2 marks within the range.
If there are more than 1 marks, the subtracter 82'
subtracts the decrement data ΔX ₂ and ΔY ₂ from the previous subtraction value, inputs this value to the comparison circuit 56, and performs the check operation for all marks again. This operation is
This process continues until only one mark appears within the range.
Next, another embodiment will be described with reference to FIG.

When there are zero marks in range L ₁ , adder 8
2' increases the value of the range _L1 by a certain amount, repeats this operation until a mark appears within the range, and when one mark appears within the range, a drive signal is sent from the counter 54 to the motor movement command circuit 64. Output.

Next, another embodiment will be described with reference to FIG.

When the in-range counter 54 counts zero or two or more pulses, the alarm device 84 is activated;
When the counter 54 counts one pulse,
A drive signal is input from the counter 54 to the motor movement command circuit 64. When the alarm device 84 sounds, the head 2 is brought closer to the mark by operating a switch to prevent the alarm device 84 from operating.

Since the present invention is constructed as described above, it has the advantage that the index can be easily matched with the center point of the read mark by manual switch operation.

[Brief explanation of drawings]

The drawings show a preferred embodiment of the present invention; FIG. 1 is an overall perspective view, FIG. 2 is a perspective view of the operation console, FIG. 3 is an explanatory diagram of the head, FIG. 4 is a block circuit diagram, and FIG. 6 is a block circuit diagram showing another embodiment, FIG. 7 is a block circuit diagram showing another embodiment, and FIG. 8 is a block circuit diagram showing another embodiment. The circuit diagram and FIG. 9 are explanatory diagrams. 2...Reading head, 4...Carrier, 6...ITV
Camera, 8... Line scanner camera, 10...
Controller, 12...X Cursor, 14...X
Rail, 16...Y rail, 18...Table,
32... Index, 36... Light detection section, 40... Switch group, 42... Current position counter, 44...
Coordinate point file memory, 46...Subtraction circuit, 48
...Range indicator, 50...Incremental file memory, 52...Adder, 54...In-range counter,
56...Comparison circuit, 58...Arithmetic circuit, 60...
Check controller, 62...Movement ON/OFF switch, 64...Motor movement command circuit, 66...Difference comparison control circuit, 68...Difference file memory, 7
0... Coordinate point file memory, 72... Comparison/discrimination circuit, 74... Minimum difference file memory, 76
. . . Minimum difference coordinate file memory, 78 . . . Arithmetic unit, 80 . . . Memory circuit.

Claims (1)

[Claims] 1 It is possible to move the head on the table, read the coordinates of the center point of the mark on the drawing on the table, and record the value in memory,
The head is equipped with an index having the same coordinate reference as this mark reading coordinate reference, and the head can be moved in a desired direction relative to the table by manual switch operation, and the amount of movement of the head is measured by the current position counter. A range indicating device 4 for setting a predetermined range L ₁ from the center of the index 32 in the coordinate reader configured to digitally count the index 32.
8, a means for calculating whether a desired mark on the drawing on _the table 18 is within the range L1, and a means for calculating the XY coordinate value A of the mark within the range _L1 to the XY coordinate value A of the center point of the index 32; Subtract the coordinate values,
The apparatus is characterized by comprising means for calculating a positional deviation value of the index 32 with respect to the mark, and means for automatically driving the head 2 in a direction in which the positional deviation value becomes zero based on the positional deviation value. Index matching device.