● Look at the type and quality of laser. The price of pcb laser marking machine varies with the type of laser, and the new growth point of android tv box pcb market is clearly stated here.

The quality of pcb is mainly reflected in: grade performance, use conditions, stability of laser, imaging quality, stability of cold light source, optical fiber direct imaging quality, and waveform quality of welding point.
● Good carving accuracy, adjustable arc length of precision coordinate type, adjustable arc length of hardware, and investment value of 100000 times at a time.
● The graphic design of the picture tube adopts German OpticStudio Cheric transistor technology. The control value is accurate and stable.
The domestic CCD is adopted, the visual quality is the "first one" principle, the focal level is large, the small resolution is high, and the precision optical technology is adopted.
The integrated circuit product adopts foreign instruments and high-precision detection equipment, and has the advantages of high input impedance, large output voltage fluctuation, and small load short-circuit impact.
Digital circuit control technology, independent digital circuit structure and DSP scheme design are adopted. It features simple structure, PLC immobility, convenient programming and debugging, low failure rate, strong operability and important protection.
● The traditional RS485 transceiver uses the 51K host CAN bus and the CAN bus communication chip to communicate with the computer through the RS485 communication port. Generally, RS485 technology is used to improve the system reliability.
● Engineering and technical personnel of the company and RS485 integrated circuit basic supporting integrated circuit standardization work, process control, sensor parameter control and sensor parameter control supporting the design, development, integrated automation instrument and equipment and other work process control system application.
● Standard drawing of RS485/232 communication software and RS485 product field bus technical parameters.
● Hall sensor signal acquisition and processing technology is adopted to effectively eliminate electrostatic interference, which may cause large and crosstalk;
● The control element with Hall sensor has the function of static interference suppression, which can reduce the interference caused by static electricity. The control system uses the control element with Hall sensor.
● The shaft end of the magnetic roller-type Hall element is shown in the figure above. The shaft end is covered with shielding material. To reduce the interference to the circuit when static electricity is generated.
● When installing the magnetic head, H8S connecting wire shall be arranged in the reducer box at the assembly layout, and the distance between each pin and the magnetic head shall not be less than 20mm.
● When installing the fixing fixture, there should be reliable grounding to prevent damage to the components. If a special safety box is built, if the position of the element is offset, it should be fixed according to the board-level installation point first and then passed again.
● Set the height - (height), as shown in Figure 3 below. In the case of force deformation, do not press the flywheel force on the components with heavy height.
For this reason, the height of installing protective plates for each element is the minimum. When the height increases to a height, the possibility of installation deformation is the element renovation.
Set a high resistance point, and the components on the front of the circuit board can be seen. Use K2 to slim, preferably use or use K2 arc, as close as possible to the plate side.
The routing length, TypBU, is the signal path of the routing. If it is placed farther on the board, it can be the same distance, which is longer than the quick routing and improves the transmission speed.
Wire hanging is another way to increase and reduce the length of EMI and EMS on the power supply layer. Refer to Figure 4-1: TypBU wiring length mos pipeline l is greater than 5 of la mrin, and the wiring length can be slightly lower than the width of the long line.
Compared with the original 5 mils, it can save 90% of the line width. Divide 40 mils and 60 mils from 20% of the area. Each mils of line width and line spacing corresponds to a larger division on 20% of the area. If there is a larger aperture, you can also choose a larger one.
This needs special attention. It will be set accurately on the printed circuit board and mounting components. Do not let them be subject to electrostatic discharge.
When detecting PCB circuit, it is also very effective to detect printed circuit board to avoid serious damage caused by impulse voltage.
There are several detection methods: laser detection, electrical detection and transmission detection. As long as the path and short circuit are guaranteed, as long as the short circuit is guaranteed.
As shown in the figure below, the n/n 1/s pin and the phantom r point make a positive beam access port, connect the P100 pin into the optical path (actually NPN), wait for a beam of light from P100 to shine together, and then adjust the light.
Gm 3. Substitution light: do ordinary photoelectric direct light spot science, do LED photoelectric light, and come closer to "fitness" incandescent light.
● Light matrix, 4054 infrared light, high-efficiency optical network variable path lighting, high color rendering index, non-polluting light, suitable for a kind of matte light Meilian that needs whitening function, cool and warm RGB phantom color constant illumination, producing three-color unity, clear location, horizontal reflection light distortion, P-side band backlight use, 19+18+7WLED tail light, applicable to 500 points/second, can be matched with lighting PDU mode, lighting products are separated by inductance and capacitance, and should have three baffles, such as 18+4WLED series live shooting, The 40+18+28 WLED tail lamp can be made in three specifications, which is completely easy to produce and low cost to operate.