The composition of one and three side turn control system
The three-face turn control system mainly includes three parts: a controller, an inductor, and a drive motor. Commonly used controllers are IC integrated circuit boards and programmable logic controllers. The sensors are generally selected metal proximity switches, and the drive motor is a single-phase reduction motor, the motor power should not be less than 90W.
Second, the working principle
The controller receives the sensor signal to control whether the three sides turn up or stop or judge whether the three sides perform error correction, output a signal to the motor, and the motor drives the drive shaft so as to turn to three sides. The main points of the three-side turn control are: 1. Night stop can be selected to stay on a certain screen 2. Each screen stay time can be adjusted individually 3. When the multi-axis drive is caused by the signal interference, it can be turned in the first time. Automatic quick error correction. 4. Can easily change the three-sided flip mode, such as the wave-type conversion to the opening ceremony. 5. The wiring is simple and easy to operate. After satisfying the above control points, the control system on the three sides is considered to be perfect, and the controller on three sides can be competent.
Third, common problems and troubleshooting
It is not difficult to see from the above control points that the choice of the three-face-up controller will be the key to the three-face turn control system, and the quality of the controller itself will directly determine the cost of the three-face reversed sale. Judging from past experience, using IC integrated circuit board to control three-folding not only has a long development cycle of hardware and software, but also has many hidden troubles due to its own stability and anti-jamming. Plus the interests of suppliers themselves, The quality of the components used was also uneven, so in the early three-sided areas, there were many problems that caused a lot of trouble for the three-sided sellers.
The current three-sided controller has gradually been aligned with the branded programmable controller. The following is the most commonly used German Siemens programmable logic controller PLC, LOGO! as a sample to explain to you the three sides of the common problems and troubleshooting methods.
Siemens controllers include Siemens PLC, LOGO!, Siemens PLC is a powerful programmable logic controller, comes with a clock, program memory space, fast operation speed, strong anti-interference ability, long output contact life, comes with Input filter, convenient expansion, can control up to 128 groups of motors; Siemens LOGO! is a Siemens programmable logic controller, comes with Chinese liquid crystal display, quality such as Siemens PLC, program storage space is relatively small, it is recommended to control within 10 motors.
The use of Siemens LOGO! is the best choice for the current cost-effective, LOGO! programming software can be downloaded for free, the software can be simulated offline, easy to learn, easy to debug. Siemens PLC does not have a monitor, but the monitor can be purchased separately. Siemens PLC can be compatible with most domestically-made displays. Domestic-made displays are relatively inexpensive.
1. Multi-Axis Three-Plane Installation After use, it will be rotated for several days and it will not be corrected on its own. The same situation will occur in a few days after maintenance. This situation is mostly caused by the program, multi-axis three-face turn, that is, three-phase turn of multiple motor drive program should filter the input signal, and generally should use the program with error correction. In addition, the installation status of the sensor will also affect the control system. The sensor probe should generally be located between the 4-8mm sensor chip. The smaller the distance, the better. Avoid the sensor's vibration and make the sensing distance greater than 8mm.
2. In the multi-axis three-face turning operation, a wrong screen appears, and after a certain period of time the stop will no longer rotate, and after turning off the power for a while, the stop will no longer rotate. After eliminating the program problem, check the sensors one by one to see if the sensor has an output signal and if it is damaged. Replace the new sensor after confirming the sensor problem. If the sensor signal is good, you need to contact the controller supplier.
3. After turning on the wrong screen in the three-side turning operation, the machine stops and one side of the screen does not turn completely. After the power is turned on again, the screen still does not rotate. After power on, check if the intermediate relay driving the motor (if any) is working. If it is active, use a stylus to measure whether the contact is connected, and the connected motor is stuck or broken. The controller output contact may be broken. Measurement controller output is normal.
4. At the beginning of the start-up time, the three-face turn-over is not started, the screen is normal, and power-off and power-on will not start. Check if the LOGO! or PLC clock is the same as the local clock, reset the controller clock, and set the three-plane startup stop time.
5. Turning on three sides will not start, the controller power light is not on or the LCD screen has no font. Check whether the switching power supply has 24VDC output, check whether the switching power supply is damaged, and check whether the switching power supply has output. The output voltage is normal.
Fourth, the controller selection
Siemens controllers have superior cost-effective features. There are 24 PLCs and LOGO! which are commonly used on three sides. The sensors used are usually AUTONICS proximity switches. At present, most of the three-faced manufacturers in China use these two types of controllers, and the price is moderate.