The hottest LED component detector based on Delta

LED component detector based on Delta motion control technology

Abstract: Based on a brief introduction of the motion control requirements of LED component detector, this paper focuses on the motion control system solution based on Delta mechatronics technology platform. The scheme uses servo technology to replace the original hydraulic positioning control system of the detector, which better meets the problem of high-speed and accurate positioning of the CCD sensor of the detector

key words: motion control servo led detector Delta

1 introduction

led (light emitting diode) light emitting diode was born in the 1960s. From the initial development of red LED, then green LED, to the latest blue LED, to the latest White LED. According to the optimistic prediction of LED developers, white LED can replace fluorescent bulbs in lighting equipment in the future, and become a promising future green light source with great social and technological significance. The biggest feature of LED is that it has the functions of power saving, low heat consumption, fast switching speed, high mechanical strength, small size, flexible packaging and combination, long service life, high electro-optical conversion efficiency, environmental protection and energy saving. What's the matter with oil trapping in the experimental machine?, At present, LED is widely used in indicating functions, such as outdoor display panels, traffic lights and plane lighting. In addition, as the technology of LED backlight becomes more and more mature, LED will become the backlight of flat-panel display, and open up new application fields. In the social environment that increasingly attaches importance to the earth's energy efficiency, its market output value will also grow significantly with the extensive use of products

2 LCD component detection motion control system

2.1 system principle

the basic principle of LCD detection is to use CCD (charge coupled device image sensor) to detect the lit led state. For the component components arranged in vertical and horizontal display of the production line, the basic task of the motion control system is to control the CCD to accurately and quickly reach the detection position of the LED of the tested object one by one, then input the voltage to light the LED of the tested object, and then use the CCD to perform its function, which is self-evident to detect the status of the lit led

2.2 motion control system

all motion control systems use delta technology platform to realize system integration. The case uses two sets of delta 5.7-inch color man-machine interface, dvp-eh series high-speed precision positioning programmable controller (PLC), dvp32eh and asda-a series 400W servo drivers and motors. Dvp-eh series models are equipped with two sets of 200kHz high-speed pulse output commands to achieve accurate and rapid reaching above the LED of the tested object. The pneumatic cylinder is used to drive the test mechanism to lower, then the input voltage is used to light the LED of the tested object, and then the CCD is used to detect the lit led state (see Figure 1 and Figure 2)

the test range and test path can be set by the customer. See Figure 3 for the case of horizontal X-axis moving right and straight Y-axis moving down; See Figure 4 for the case of straight Y-axis moving down and then horizontal X-axis moving right. Match the recipe peek monofilament in the human-machine interface or use the single-stage or two-stage stretching orientation function to establish the database. See Figure 5 for the recipe screen of the user entering the database. The red path is the first test area, the blue path is the second test area, and up to three test areas can be reached. The position of the sample point and the first point can be taught in the way of position teaching. The inching position teaching function is shown in Figure 6, which is very convenient

Figure 3 starts to move the x-axis horizontally to the right, and then moves down the y-axis straightly.

Figure 4 starts to move down the y-axis straightly, and then moves the x-axis horizontally to the right.

the user can build the type input and test range type data of the test led into the man-machine database in advance, and can store 99 LED board data. When the test type and test range of the LED are to be replaced for testing, the user only needs to select the product number, Then use the man-machine to download the test range and test path to the PLC end

3 conclusion

this electromechanical servo control project is designed to replace the hydraulic positioning control system of LED detector to solve the problem of fast and accurate positioning. Originally, the customer used the oil pump to move the position, but the oil pump cannot move quickly and accurately, which will easily cause instability because of the change of the oil pressure. In addition, the user needs to print out various kinds of data sheets by himself. When replacing the test LED board, it is very inconvenient for the user to input the data; Nowadays, after using delta system, delta AC servo system is used to improve the problem that it was originally unable to move quickly and accurately, and shorten the time of testing led, so as to increase the output of testing. However, the use of delta human-machine interface is greatly improved. When replacing the testing LED board, the user needs to input all data. The user can load the data as long as he selects the code of the data input by the original designer, It shortens the time of replacing and testing led boards by manual input. Because time is money, it shortens the testing time and achieves the goal of gradually building a multi-level patent protection system, improving the productivity and improving the benefits expected by customers. (end)