SU881673A2 - Two-coordinate programme-control device - Google Patents

Description

(54) TWO-COORDINATE DEVICE FOR SOFTWARE The invention relates to automation and can be used to programmatically control installations of assembling electronic products, such as integrated circuits (ICs). According to the main auth. No. 807218, a two-coordinate device for programmed control is known, containing a command block and in each coordinate a first digital-analog converter, a program block, a first counter, a second counter connected by an input to the first output of a command block, a serially connected key, an adder and a comparison block, a second the input of which is connected to the output of the second digital-to-analog converter, the output to the first input of the stepper drive of the given coordinate, and the correction unit whose output is connected to the first input of the key of another coordinate Data connected by the second input to the second output of the command block, the third output of which is connected to the input of the program block, and the fourth output and input, respectively, to the second input and output of the stepper drive of this coordinate, and in each coordinate the code converter, the OR element and the switch, the output whom

CONTROL is connected to the input of the second digital-to-analog converter of this coordinate, the first input is with the output of the second counter of this coordinate, the second input is with the second output of the command block, and the third output is through the first counter with the output of the OR element, this coordinate connected by the inputs to the first and n to the outputs of the command block, and in each coordinate the input of the first digital-to-analog converter is connected to the output of the program block through a code converter, and the corresponding outputs with the inputs of the correction block and the second progress of a given one of the adder coordinates. This device allows you to automatically connect the wire leads to the contact pads of the crystal and the IC output frame. However, the device does not accurately determine the coordinates of the crystal as its size increases and the inaccuracy of fit in the angle. The aim of the invention is to increase the accuracy of the device. The goal is achieved by introducing a scale amplifier into each coordinate, the output of which is connected to the third input of the adder.

this coordinate, and the input is from the output of the key of another coordinate.

The drawing shows a block diagram of the device.

The device contains a command block 1 and two coordinates X and Y, each of which consists of a second 2 and first 3 counters, program block 4, switch 5, key b, code converter 7, second 8 and first 9 digital-analog converters, comparison block 10, the adder 11, the correction unit 12, the stepper drive 13 of the element OR 14 and the scale amplifier 15.

The device works as follows. ,

Block 4 specifies, in binary code, the X coordinate of the weld point, as well as the sign of the coordinate, which is transformed by converter 7 to binary code, and converter 9 to voltage. Converter 9 has direct and inverse outputs, the signals from which are fed to the inputs 6jiOKa 12, and the direct signal (analog coordinate value) is simultaneously fed to the adder 11. From the output of block 12, a signal equal to the X coordinate of the welding point is output on a crystal at an angle of jV i i for small angles). corresponding to the angle of rotation of the crystal relative to the position specified in the program. This signal is an amendment to the coordinate of the orthogonal direction and an amendment to its own coordinate, therefore it passes through the key b, summed with the analog value of the Y coordinate and, having passed through the amplifier 15 (the transfer coefficient is 1/30), is summed with the analog value of the X coordinate The angle correction produced in the Y coordinate channel is fed through the key 6 of the channel X to the adder 11 of the channel X and through the amplifier 15 to the adder 11 of the channel Y.

The OR 14 element allows for the introduction of a 3 linear coordinate correction into the counter. Counter 2, like counter 3, counts the pulses of the clock generator of drive 13. Counters -2 and 3 are connected via switch 5, controlled by unit 1, to converter 8, which converts digital information found in the selected pulse counter to analog form ( voltage).

Block 10 compares the voltage corresponding to the value of the address coordinate to which the welding tool is to be output, with the current coordinate in which the welding tool driven by the drive 13 is located. In addition, block 10 controls the on and off of the iriod 13 and sets

direction of travel along the coordinate.

In the initial state, the position of the welding tool coincides with the initial point, relative to which the coordinates of the points of welding of the crystal and the frame are given. The operator makes an overlap of the optical mark - overlap, which coincides with the position of the tool, with the coordinates of the first welding point on the crystal, while the correction for the coordinate is entered into the counter 3 through the OR 14 element. The correction in the turn angle is entered when the Moving-Over-Cross optical system is rotated to a position at which the marking lines become parallel to the axis of symmetry of the crystal. The presence of a mechanical connection between the optical system and the angular correction potentiometer provides the desired angle correction value. The command from the output of block 1 interrogates the first coordinate specified in block 4, it is converted into binary code by the converter 7, then the converter 9 is converted to voltage, fed to the adder 11 and block 12.

In the case of working out the coordinate of the crystal, the correction from block 12 of channel Y through key b goes to the adder 11 of the channel of the X coordinate and through the amplifier 15 to the adder 11 of the channel of the Y coordinate. A similar action takes place in the orthogonal channel. The drive 13 starts at the same time In this case, pulses are generated at its output, read out simultaneously by counters 2 and 3. Switch 5 in this case connects counter 2 to converter 8, which has at its output a voltage corresponding to the current coordinate e, represented in digital form in the counter 2. At the time of the coincidence of the two voltages, the block 10 turns off the drive 13 and ascertains the fact that the tool has reached the specified point. .

The next command block 1 queries the coordinate of the output frame. The process of working out is the same as for the crystal point, only in this case the key 6 disconnects the block 12 from the adder 11 and the amplifier 15, and the switch 5 connects the counter 3/1 in which the correction along the linear coordinate is located. The magnitude of the displacement in this case is greater or less than the value specified by block 4, depending on the value of the correction along the linear coordinate. Since the linear coordinate correction is entered once in one of the counters, and then counters 2 and 3 count the pulses synchronously, the correction remains during the whole-cycle of the crystal unwinding, present as the difference between the number of pulses in counters 2 and 3.

The application of the invention allows to improve the accuracy of working out the coordinates for crystals with large linear dimensions and having a large turn in the angle.

Claims (1)

Claims of the Invention Biaxial device for programmed control according to the author.  807218, characterized in that, in order to improve the accuracy of the device, a scale amplifier is inputted to each coordinate, the output of which is connected to the third input of the adder of this coordinate, and the output to the output of the key of the other coordinate. Sources of information taken into account in the examination 1. USSR author's certificate 807218, cl. G 05 B 19/18, 1977.