The servo?mechanism is a process control system that enables the output of the direction, direction, and condition of the block to change at will according to the input overall goal (or given value).
How does Mitsubishi servo motor complete accurate positioning?
So how does Mitsubishi servo motor insist on accurate positioning, how to view its closed-loop control characteristics, let's talk about it today. First of all, let's look at the composition of the communication servo control system, which is composed of a servo controller and a Mitsubishi servo motor. Here we will focus on the principle of servo motor drive, which is just an electric actuator. The schematic diagram of the structure of the controller is similar to the main power supply circuit of the soft starter, and the switching power supply goes through the transformer, the inverter power supply, and insists on the conversion from AC → DC → AC.
The input data signal/command can be the azimuth, rate, torque and other control data signals, matching the three control forms of Mitsubishi servo motor, each control form is matched with the control of the ring, the torque control is the current response control, the rate form is the rate reaction control, and the azimuth form is the three-reaction control form (torque, rate, direction). The following is an analysis of the three closed-loop manipulation of the azimuth form:
Triple reaction manipulation in the form of azimuth
M means communication servo motor, PG means servo motor, the outermost sky blue means azimuth ring, because the last one we control is the azimuth (precise positioning), the inner ring is the rate ring and the current ring (torque ring), the rate ring and the current ring in the azimuth form are used as protection rings to prevent stall control and load to ensure the constant speed operation of the motor and the stability of the motor current. Let's take a look at how the azimuth ring ensures that the motor can accurately roll the perspective given.
If we give a pulse of 1, then the reaction pulse is 0, the pulse error △p=1, input to the control board, at this moment the drive circuit controls the IPM inverter power supply to cause the SPWM wave driver Mitsubishi servo motor to roll, pay attention to this SPWM wave and our plc pulse square wave is not the same, when the motor pushes the servo motor to roll out the reaction pulse, at this time △p=0, the motor stops output, 1 pulse accurate positioning. The whole process from the outgoing pulse to the reaction pulse is a closed-loop control process, which ensures that the motor can be accurately positioned, the total number of pulses determines the spacing of the planned precise positioning, and the frequency of the pulses determines the speed ratio of the planned motor.
|
More on that
|
Functional characteristics of Mitsubishi's various series of servo motors
Mitsubishi servo motor system series: MR-J2S series, MR-J3 series, MR-ES series, MR-E series.
Mitsubishi servo motor MR-J2S series
1. The product also has RS-232 and RS-422 serial communication functions, which can be used by a personal computer equipped with servo setting software.
|
|
Mitsubishi A800 series inverter realizes motor self-learning
Set it up as follows:
Press PU/EXT to switch to PU format
Pr.9 = additional current of the motor
Pr.71=3 (ordinary motor) or 13 (constant torque motor)
Pr.80 = motor power
Pr.81 = number of poles of the motor ( ...
|
|
Performance comparison of Mitsubishi servo motors
First, the control accuracy is different
The step angle of the two-phase hybrid Mitsubishi servo motor is generally 1.8 ° and 0.9 °, and the step angle of the five-phase hybrid Mitsubishi servo motor is generally 0.72 ° and 0.36 °. Mitsubishi servo motors, which are also some functions, have a smaller step angle after segmentation.
...
|
|
Inverter overload fault factor - Mitsubishi inverter
1) The mechanical load is too heavy
The main characteristic of overload is the fever of the motor, and it can be detected by reading the operating current from the display. The main factor is that the load of Mitsubishi inverter is too large, and the acceleration and deceleration time and operation cycle time are too tight; V/F features voltage too ...
|
|
Performance comparison of Mitsubishi servo motors
First, the control accuracy is different
The step angle of the two-phase hybrid Mitsubishi servo motor is generally 1.8 ° and 0.9 °, and the step angle of the five-phase hybrid Mitsubishi servo motor is generally 0.72 ° and 0.36 °. Mitsubishi servo motors are also smaller in some functions according to the segmentation. Such as Sanyo ...
|
|
Mitsubishi inverter OC causes the failure
1. The ERR problem is an under-voltage problem, which is usually caused by the problem of voltage detection loop resistance or wiring, rather than the actual input voltage showing undervoltage. Most of the OC problems of the A200 series are caused by the damage of the drive circuit, and its drive circuit ...
|
|
Mitsubishi servo motor is now commonly used
Torque control: Torque control is based on external simulation imitation typing or direct address assignment to set the output torque of the motor shaft. For example, 10V matches 5Nm. When the external simulation simulation is set to 5V, the output of the motor shaft is 2.5Nm. If the load of the motor shaft is less than 2.5Nm, then when ...
|
|
Mitsubishi inverter installation reactor advantages
1. Characteristics of the output reactor:
1. It is suitable for reactive power compensation and harmonic control
2. The primary effect of the output reactor is to compensate for the influence of long-line distributed capacitance, and output harmonic current according to the press; 3. Effectively protect the Mitsubishi inverter and improve the power factor, which can block the ...
|
|
Mitsubishi PLC remote fault diagnosis connection
Mitsubishi PLC is widely used in digital control systems. At present, equipment long-distance control plays an important role in long-distance data collection, PLC long-distance fault diagnosis, and PLC long-distance programming. This article takes the long-distance control of Mitsubishi PLC as an example, and after the HiNet intelligent gateway of Huachen Zhitong ...
|
|
PLC commonly used physical memory - Mitsubishi
(1) Random Access Memory (RAM) The user can read out the content of the RAM with the programming device, and can also write the user program to the RAM, so the RAM is also called read/write memory. It is volatile memory, and when its power is interrupted, the stored information is lost. The use of the computer's memory module ...
|
|
Advantages and applications of servo motors - Mitsubishi
First of all, what are the advantages of servo motors compared with other motors (such as stepper motors):
1. Accuracy: Closed-loop control of azimuth, speed and torque is realized; Overcome the problem of stepper motor out-of-step;
2. Speed: high speed ...
|
|
Mitsubishi origin regression method
1. Data setting type
This method is to set the current bearing as the origin. Therefore, at this time, no matter which direction the servo motor stops at, only the data setting type origin return is required, and now this direction is the origin direction. So, the origin regression operation under this method, ...
|
|
Introduction to Mitsubishi PLC Modbus communication and address allocation
When using Modbus communication in Mitsubishi PLCs, it is necessary to understand the address allocation of different register types.
The following are the common types of Mitsubishi PLC Modbus addresses and their corresponding functions:
1. Coil Register: ...
|
|
The matching relationship between the inverter and the motor - Mitsubishi
It has become an irreversible trend to drive the motor through the inverter, and in the actual application process, because the matching relationship between the inverter and the motor is not very reasonable, it often leads to some problems. When selecting an inverter, you should fully understand the load characteristics of the equipment driven by the inverter. Ms. Ginseng ...
|
|
Mitsubishi PLC commonly used circuit programming application
1. Self-locking and interlocking circuits
1) Self-locking circuit: The self-locking circuit is often used for the start-stop control of the motor.
Press the start button X0 motor to start running, release the start button to keep the motor running, press the stop button X1 motor to stop running.
2) Interlock ...
|
|
Mitsubishi PLC module model
FX3S-10MR/ES AC power supply · DC input type input: 6 points DC24V drain/source type output: 4 points relay
FX3S-10MT/ES AC power supply · DC input input: 6 points DC24V drain/source output: 4 points transistor drain type
FX3S-10MT/E ...
|
|
Mitsubishi PLC has a built-in time adjustment step
1. TWR (Time Write) command
Instructions to write time presets to the built-in real-time clock: Clock information is written to the TWR (Time Write) command. The sequence number of the action instruction is FNC167, [S ·] T, C and D can be used, and only 16-bit operations can be used, accounting for 5 program steps.
The work of the directive ...
|
|
Introduction to Mitsubishi PLC network structure
1. The equipment layer/fieldbus CC-Link equipment layer is a field network that connects PLC and other control equipment, sensors and drive equipment, which is the lowest layer of the entire network system. The CC-Link fieldbus connection greatly reduces the number of wirings and improves the maintainability of the system. Whereas...
|
|
Mitsubishi's introduction to the three-circuit system
Servo motors are generally operated by three circuits. To put it bluntly, the three circuits are three closed-loop control negative feedback PID control systems.
The first innermost PID loop is the current loop, which is implemented completely inside the servo controller. Exercise...
|
|
Mitsubishi servo maintenance failure analysis
Major Failures and Analysis:
1. Motor encoder alarm
1. The cause of the failure
(1) Wrong wiring;
(2) electromagnetic interference;
(3) Encoder hardware damage caused by mechanical vibration;
(4) Pollution caused by the on-site environment;
2. Troubleshooting
...
|
|
Contact
working hours
