Electric control principle of all-electric injection molding machine

one,Full electric injection molding machinePrinciple of Electronic Control
1. Servo Motor
Servo: The word derives from the Greek word “slave”. People want to use the “servo mechanism” as a handy tool for taming, acting in accordance with the requirements of the control signal. Before the signal comes, the rotor stays still; after the {TodayHot} signal comes, the rotor rotates immediately; when the signal disappears, the rotor can stop automatically immediately. It is named because of its “servo” performance.

Servo system: It is an automatic control system that enables the output controlled quantity of the object’s position, orientation, and state to follow the arbitrary change of the input target (or given value). The main task of the servo is to amplify, transform and adjust the power according to the requirements of the control command, so that the torque, speed and position output of the drive device can be controlled very flexibly and conveniently.

Lijin PT60V servo system principle

Lijin PT60V servo system principle:
Servo motor: Servo motor, also known as executive motor, is used as an actuator in an automatic control system to convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. Its main feature is that there is no rotation when the signal voltage is zero, and the speed decreases at a uniform speed as the torque increases.

The advantages of servo motors: large torque, simple control, flexible assembly.

The structure of the servo motor: a servo motor includes a DC motor; a set of variable speed gear sets; a feedback adjustable potentiometer; and an electronic control board. Among them, the high-speed rotating motor provides the original power to drive the variable speed (reduction) gear set to produce high torque output. The higher the gear ratio of the {HotTag} gear set, the greater the output torque of the servo motor, which means The more it can bear the heavier weight, but the lower the speed of rotation.

Clamping Servo Motor

The working principle of the servo motor:
The servo motor is a typical closed-loop feedback system. The reduction gear set is driven by the motor, and its terminal (output end) drives a linear proportional potentiometer for position detection. The potentiometer converts the corner coordinates into a proportional voltage and feeds it back to the control circuit board. The control circuit board compares it with the input control pulse signal, generates a correction pulse, and drives the motor to rotate in the forward or reverse direction, so that the output position of the gear set matches the expected value, and the correction pulse tends to 0, so as to achieve the servo The purpose of precise positioning of the motor.

Servo motor control:
The standard servo motor has three control lines: power, ground and control. The power line and the ground line are used to provide the energy required by the internal motor and control circuit. The voltage is usually between 4V-6V. The power supply should be isolated from the power supply of the processing system as much as possible (because the servo motor generates noise). Even a small servo motor will pull down the voltage of the amplifier under heavy load, so the power supply ratio of the entire system must be reasonable. Input a periodic positive pulse signal. The high level time of this periodic pulse signal is usually between 1ms-2ms, and the low level time should be between 5ms and 20ms.

2. Servo controller: intelligent digital servo driver
1). Input voltage: AC200V－480V
2). UL/CE approved
3). IP20 protection level
4). 0－45℃ standard operating temperature
5). Including discharge resistance
6). Comprehensive motor temperature monitoring
7). Integrated motor brake control
8). 2 analog inputs
9). 2 analog output
10). 2 marked signal interfaces
11). Position cam switch control
12). Electronic synchronization function, fast response speed, feedback time 62.5μs.
13). SERCOS interface or fieldbus interface