The difference between INVT servo motor and inverter

Nowadays, there are many servo motors used. In places where high precision is required and high torque is required in low speed sections, such as injection molding machine occupation, it has been widely used, and it does show good functions. It is much better than the general inverter. I also accidentally touched the communication servo. I hope that people in the industry can talk about installation, debugging and repairing. Let me first introduce a jade:
1, in terms of its main circuit structure, and the inverter is exactly the same. 2, operating in the speed closed loop, its speed accuracy is guaranteed. 3, in terms of control, software and hardware, are better than the inverter. The servo use and motion control are very convenient, the positioning accuracy is very high, and the servo system has always been used. The main circuit principle of this servo is very similar to that of the inverter. Nearly the same, the control is quite different. The penetration rate of communication servos will be higher and higher, after all, the price advantage is there. Now touch the Japanese, such as Panasonic, Fuji, Mitsubishi are not very good repair. Difficult point 1: The test machine should use servo motor, and some different brands of encoders and interfaces of the same brand are different. Difficult point 2: If there is no alarm and can't move with the scene, the running distance will not follow the procedure. Difficulties 3: Nowadays, most of the imports are checked by the multi-layer board. I refer to this kind of servo, which is a high-power communication servo, and is common to inverters. Set the parameter to the V/F method, that is, enter the open loop operation mode, which is the same as the inverter operation method. The servo is used to a permanent magnet synchronous motor and a general communication motor. There is no need to shield the encoder alarm. For the encoder feedback signal, I have had an idea to use the microcontroller to make a "simulated" feedback pulse. Or use a micro speed motor to drag the encoder to generate a feedback pulse, so that the servo can enter the working state. It is not known whether it is feasible to create maintenance conditions. Listen to the opinions of comrades. As usual, the touch servo is more, and the servo repair has the advantage that the module will not be fried at all. The repair cost is small, the price is high, the technical content is higher, the drive board is similar to the inverter, and the main board is very different. In fact, it is similar to the inverter in general, but it is different if it is used in precision machining, such as rigid tapping. There is also the benefit of the servo plus the enabling motor does not heat up. The frequency converter is mainly used for speed control. The servo is mainly used for position control and of course speed control. Although the main circuit principle is the same, the servo has more position loop control. It is very troublesome for the servo drive to have a suitable motor, and some servos still do not have an operation panel. Even with a panel, the requirement is to have the same output method, and an encoder of the same resolution is a very difficult job. Even if the problem of the encoder is solved, there is a motor that is very difficult to match. The power of the servo driver to be repaired is not the same, and the voltage level is not the same. It cannot be used with a small motor like the inverter. Because the internal algorithms of the servo drive are built-in speed loops and current loops, they cannot be closed. In particular, the current loop is also said to be controlled by the current closed-loop regulation. The size of the current is determined by the internal algorithm, not the size of the motor that is dragged!