1. Torque control: Torque control sets the output torque of the motor shaft through external imitation input or direct address assignment. For example, 10V is equivalent to 5Nm. When the external analog is set to 5V, the output of the motor shaft is 2.5 Nm. If the motor shaft load is less than 2.5 Nm, the motor does not rotate when the external load is 2.5 Nm (2.5 Nm or greater). When the motor rotates (generally under gravity load). To change the torque setting, it is possible to change the imitation amount setting in real time, and it is also possible to change the value of the corresponding address via communication.
This use is mainly used for winding and unwinding equipment that has strict requirements for the strength of the material, such as wire drawing equipment and optical fiber drawing equipment. The torque setting must be changed at any time according to the change of the winding radius, so that the data force does not change due to the change of the winding radius.
2. Azimuth control: The azimuth control form is generally based on the frequency of the external input pulse to determine the rotation speed, and the rotation viewpoint is determined according to the number of pulses. Some servers are able to directly distribute velocity and displacement via communication. The azimuth form is generally used for positioning devices, as it promises precise manipulation of speed and bearing. Field of use: CNC machine tools, printing machinery, etc.
3. Speed form: The speed can be controlled by imitation input or pulse frequency. PID. The outer ring of the upper control device can be used, and the speed form can also be positioned, but the azimuth signal of the motor or the azimuth signal of the direct load must be reflected to the upper layer for operation. The azimuth form also supports direct load loop detection of azimuth signals. At this moment, the encoder at the shaft end of the motor only detects the speed of the motor, and the azimuth signal is provided by the direct detection device at the end of the load. The advantage is that the error in the central transmission process is reduced, and the positioning accuracy of the whole system is improved.
4. Explain the three-circuit system. The servo is generally operated by three circuits. The so-called 3 circuits are 3 closed-loop negative response PID control systems. The innermost PID loop is the current loop, which is fully operational in the servo drive. The output current from the driver to the motor is detected by the Hall element, and the setting of the negative reaction current is adjusted by the PID, so that the output current is as close to the set current as possible. The current loop controls the torque of the motor, so the action of the drive is minimal and the dynamic response is minimal in the torque form. It should be the fastest.
|
More on that
|
Characteristics of servos and advantages of Mitsubishi servos
The servo system is an automatic control system that enables the output of the object's orientation, direction, and state to change with the arbitrary change of the input quantity (or given value). In the automatic control system, the system that can echo the control signal with a certain degree of accuracy is called the follow-up system, also known as the servo system.
|
|
Mitsubishi PLC Comparison Instruction Application
1. Compare the instruction CMP
1）。 16-bit arithmetic (CMP, CMPP) compares the contents of the comparison value S1 with the comparison source S2, and according to the results (small, - zhi, large), D, D+1, D+2 - one is ON.
...
|
|
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 ...
|
|
Which components in the Mitsubishi inverter need to be replaced regularly
Mitsubishi inverter is composed of many electronic parts, such as semiconductor components, etc., in the application and protection involves the replacement of a related component, because of the composition or physical characteristics of the inverter, in a certain period of time will deteriorate, thus reducing the characteristics of the inverter, is ...
|
|
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 ...
|
|
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 servo about the selection of robot methods
When evaluating which process is suitable for which approach in the production environment, it is important to carefully consider the problem you want to deal with and consider all the costs that the robot can save: cutting waste, improving efficiency, improving yield, improving safety, or reducing labor costs. These costs ...
|
|
The working principle of the servo motor of the Mitsubishi CNC system
1. The servo mainly relies on the pulse to position, basically it can be understood in this way, the Mitsubishi CNC system maintenance servo motor receives a pulse, and it will rotate the angle corresponding to the pulse, so as to achieve displacement, because the servo motor itself has the function of sending out pulses, so the servo motor ...
|
|
The relationship between torque and performance of Mitsubishi servo motors
1. Additional torque
The torque that occurs on the motor shaft under additional voltage, extra load is called the extra torque of the motor.
2. Starting torque
The torque generated by the motor at the moment when a voltage is applied to the motor in the aborted condition is called the starting torque. The starting torque characterizes the electrical...
|
|
Modbus communication and address assignment for Mitsubishi PLC
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:
...
|
|
Mitsubishi PLC encryption process
The encryption process is as follows:
** Open the serial port for the first time
[00000000] IOCTL_SERIAL_SET_BAUD_RATE Baud Rate: 9600 (Set baud rate here)
[00000000] IOCTL_SERIAL_SET_LIN ...
|
|
Mitsubishi takes instructions and outputs instructions
1) LD (take instruction) A command to connect a normally open contact with the left bus, and every logic line that starts with a normally open contact is used with this instruction;
2) LDI (Reverse Instruction) A normally closed contact is connected to the left bus to the instruction, each ...
|
|
Mitsubishi FX1N switching power supply fault repair
Problem description: The power supply of the Mitsubishi FX1N-60MR-001 has no display (the safety guard, filter, temperature protection element, and rectifier are damaged).
Inspection and repair: After the PLC is connected to the power supply, the power indicator (POWER light) does not light up.
|
|
Advantages of Mitsubishi Electric fresh air system
Mitsubishi Electric's fresh air system realizes indoor ventilation, but of course, we can't just be limited to simply replacing the outdoor air into the room, a good fresh air should filter the harmful substances in the air, so that the air entering the room is not only fresh, but also clean and harmless.
...
|
|
The interaction between the PLC and the touch screen is consistent - Mitsubishi
When the contact screen is connected with the PLC, in fact, the memory of the PLC is used, (the contact screen also has a small amount of memory, which is only used to store system data, that is, the screen, controls, etc.), the contact screen and the PLC communication is generally a master/slave relationship, that is, the contact screen reads data from the PLC, and after making a judgment, it is displayed in the display ...
|
|
The built-in analog quantity of the Mitsubishi PLC function module is changed to current input
Mitsubishi FX5UCPU module has a built-in analog input as a voltage input (DC0-10V),
In this way, it can be converted into an analog current input (DC4 - 20m).
[Method used in current input (DC4 - 20mA)]
FX5UCPU module only supports voltage ...
|
|
The correct maintenance method for Mitsubishi inverters
Mitsubishi inverter we have to maintain the inverter module frequently, to regularly check the Mitsubishi inverter module, especially the maintenance of the cooling fan, due to the high power of the cooling fan, high speed, in the dusty working environment, simply lead to the radiator exhaust hole blockage, so that the internal electric ...
|
|
Review and comparison of Mitsubishi PLC control inverter methods
1. The switching signal of PLC controls the inverter
The output point and COM point of the PLC (MR type or MT type) are directly connected to the STF (forward engine), RH (high speed), RM (medium speed), RL (low speed), and input SG ports of the inverter. The PLC can be programmed to control the inverter's start, ...
|
|
The impact of Mitsubishi inverters on the quality of the power grid
In the case of impact loads such as electric welding machines, electric arc furnaces, rolling mills, etc., the voltage often flickers; In a workshop, when there are multiple Mitsubishi inverters and other capacitive rectifier loads working, the harmonics that occur are very serious pollution about the quality of the power grid, and there is also considerable damage to the equipment itself.
|
|
Anti-interference performance measures of Mitsubishi PLC system
1. Choose a power supply with excellent performance and press the disturbance introduced by the power grid
In the PLC control system, the power supply occupies a very important position. The power grid disturbance series into the PLC control system is mainly through the power supply of the PLC system (such as CPU power supply, I/O power supply, etc.), the power supply of the transmitter and the power supply with P ...
|
|
Contact
working hours
