What are the functions of the relays, controllers, air switches and controllers on the CNC lathe?
Controller - simply speaking, the brain, processing input and output signals and operations, and so on
Relay and AC contactor is a low voltage high voltage control device, the CNC system can not be directly output high voltage to control the motor action, so the current CNC system will be great, easy to damage, so the system will control the relay coil, give it a signal or pull off, so as to control the drive to action the motor is energized or power.The air switch has two functions, one is the switch action, the other is the overload protection function. When the current exceeds the set value, it will automatically turn off and prevent the damage of the components. TwoFor the controller, I do not know, can not jump to conclusions
1, the relay (Relay), also known as the relay is an electronic control device, it has a control system (also known as the input circuit) and control system (also known as the output circuit), usually used in automatic control circuit, it is actually a "automatic switch to control a larger current with small current". Therefore, the circuit plays an automatic adjustment, security protection, conversion circuit and so on. The relay coil is indicated by a rectangular frame in the circuit. If the relay has two coils, the two rectangular frames are juxtaposed. At the same time, in the rectangular box or rectangular box next to mark the relay text symbol "J"". There are two methods of relay contact: one is to draw them directly on one side of the rectangular box, which is more intuitive.2, the controller (English Name: controller) is a master device in accordance with the resistance change circuit wiring and a predetermined sequence change or control circuit to control the value of motor starting, speed control, braking and reverse. It consists of program counter, instruction register, instruction decoder, timing generator and operation controller. It is the decision-making organ of issuing commands, that is, the operation of coordinating and directing the whole computer system.3, air switch, also known as air circuit breaker, is a circuit breaker. The utility model is a switch which can be automatically switched off as long as the current in the circuit exceeds the rated current. Air switch is one of the most important electrical appliances in low voltage distribution network and electric drive system. It combines control and multiple protection functions. In addition to complete the contact and breaking circuit, it can protect the circuit or electrical equipment from short circuit, serious overload and under voltage, and also can be used to start the motor frequently.
