Monthly Archive September 28, 2020

computer gong processing

  1. The vertical milling head is equipped with tx400 heavy gantry milling head and double rectangular guide rail with strong rigidity;
  2. The milling head is equipped with ball screw, pneumatic broach device and driven by servo motor;
  3. The side milling head is equipped with V5 type gantry milling head, the high-speed computer gong processing is equipped with independent lubrication device, and the lifting is driven by ordinary reducer with frequency conversion speed regulation;
  4. The three-axis CNC system with one key conversion from general milling to CNC milling can be programmed and operated manually by using the extended panel, which is highly realizable in the actual machining process;
  5. The machine bed forward and backward, beam up and down, vertical milling head up and down are equipped with Taiwan ball screw, driven by servo motor;
  6. Equipped with synchronous belt and synchronous wheel;
  7. Hand held electronic hand wheel unit, convenient for three axis tool setting;
  8. Dongguan machine parts processing unique beam lifting safety interlock device, CNC processing to ensure the repeated positioning accuracy of the machine tool;
  9. The cycloid pump set is lubricated continuously with low failure rate.

Vacuum blister mold

The design of vacuum suction molding mold includes batch size, molding equipment, precision conditions, geometric design, dimensional stability and surface quality. Properties and surface quality.

  1. Batch size experiments, mold production hours, can be made of wood or resin. However, if the mold used in the experiment is to obtain the data of shrinkage, dimensional stability and cycle time of the product, the single cavity mold should be used for the experiment, and it can be used in the production conditions. Molds are generally made of gypsum, copper, aluminum or aluminum steel alloys, and aluminum resin is rarely used.
  2. In geometric design, dimensional stability and surface quality should be considered comprehensively. For example, the product design and dimensional stability require the use of female die (female mold), but the product with high surface gloss requires the use of male mold (punch). In this way, the ordering party of plastic parts will take these two points into consideration, so that the product can be produced under the best conditions. Design failure is often proved by experience. As a special process equipment with high service life, mould has the following production characteristics:

(1) It belongs to single piece and multi variety production. Mold is a special process equipment with high life. Each die can only produce parts of a certain shape, size and precision, which determines that mold production belongs to the nature of single piece and multi variety production rules.

(2) The objective requirement of mould production cycle is short. At present, due to the acceleration of new product upgrading and market competition, mold production cycle is required to be shorter and shorter objectively. The production management, design and process of die should meet the objective requirements.

(3) Complete set of mould production. When a part needs more than one pair of molds to process, each pair of molds often implicate and influence each other. Only when the final part is qualified, this series of molds can be considered as qualified. Therefore, this feature must be fully considered in production and planning.

(4) Mold test and repair. Because of the above characteristics of mold production and the experience of mold design, the mold must pass the test punching or pressure test after assembly, and finally determine whether it is qualified; at the same time, some parts need to be repaired before final determination. Therefore, there must be a certain trial period in the production schedule.

(5) Mold processing is developing towards mechanization, precision and automation. At present, the requirement of die precision for product parts is higher and higher. There are more and more molds with high precision, high life and high efficiency. The machining accuracy mainly depends on the accuracy of machine tools, processing conditions, measurement means and methods. At present, the use of precision molding grinder, CNC high-precision surface grinder, precision CNC WEDM machine, high-precision continuous track coordinate grinder and CMM are becoming more and more popular, which makes mold processing develop to high-tech intensive.

Because different molding molds have been applied in many fields, and the manufacturing technology of professional molds has also changed and developed in recent years, the general design rules of vacuum Blister molding molds are summarized in this part.

The design of vacuum suction molding mold includes batch size, molding equipment, precision conditions, geometry design and dimensional stability

  1. During the molding process, the dimension stability of the contact surface between the plastic part and the mold is better than that of the part leaving the mold. If the material thickness is required to be changed due to the requirement of material stiffness in the future, it may lead to the conversion of male mold to female mold. The dimensional tolerance of plastic parts shall not be less than 10% of shrinkage.
  2. The surface structure of the plastic part should be formed at the contact with the mold in terms of the range covered by the molding material. If possible, the polished surface of the plastic part should not contact the mold surface. It’s like using a female mold to make bathtubs and washbasins.
  3. If mechanical horizontal saw is used to saw off the clamping edge of plastic parts, there should be at least 6-8mm allowance in the height direction. Other finishing work, such as grinding, laser cutting or jet, must also be allowed. The gap between cutting lines of knife edge die cutting is the smallest, and the distribution width of trimming punching die is also very small.
  4. Shrinkage and deformation, plastic is easy to shrink (e.g. PE), some plastic parts are easy to deform, no matter how to prevent, plastic parts will deform in the cooling stage. In this condition, it is necessary to change the shape of the mold to adapt to the geometric deviation of the plastic part. For example, although the wall of the plastic part remains straight, its reference center has deviated by 10 mm; the mold base can be raised to adjust the shrinkage of this deformation.
  5. Shrinkage, the following shrinkage factors must be considered when manufacturing Blister molding mold.

Mold quality of computer gong processing

The molds used in the production line must pass the inspection before being put into storage. Inspection procedures: ① the last part of the production line is sent for inspection, and the qualified parts are put into the warehouse with the certificate. ② The mold maintenance personnel shall check whether the tool edge of the mold is sharp, whether the guide parts are lubricated, whether the positioning is reliable, whether the spring top is powerful, and carry out maintenance if necessary. After the mold is qualified, the certificate and sample shall be put into the warehouse. ③ If there is no need for maintenance, the certificate and samples should be put into the warehouse.

  1. The dispatcher puts forward the requirement of backup mould according to the production needs and mould wear. Report to the competent department and project leader. Ensure the normal production.

4、 Die scrapping system mold scrap system is to ensure that the mold can not normally produce qualified products, and there is no mold repair or mold change necessary to protect the company’s assets.

  1. The scrapped molds must be returned to the mold warehouse, so the scrapped molds must be provided with a scrap certificate, which must be signed by the mold administrator and the mold inspector, and the reasons for scrapping must be written.
  2. After the die is scrapped, the relevant mould data must be filed to the document control center for inspection.

5、 Responsibilities and rights of mold warehouse management personnel

  1. The mould should be put on the shelf according to the production order 1 ᦇ, 2 ᦇ and 3 ා. The returned mould should be placed in the original position.
  2. The storekeeper shall be responsible for the balance of account, card and material phase. The general ledger, mold certificate, test card, sample parts, production files should be kept well, and the inventory, collection, maintenance and other molds should be well known. Supervise and urge the mold maintenance personnel to put the repaired mold into storage in time.
  3. The storekeeper should find the mould quickly according to the production order number.
  4. The storekeeper shall be responsible for the intactness of the molds in storage, receiving and returning. No confusion, loss or damage is allowed. The mould management system should be strictly followed. Make sure that the molds from the warehouse are qualified for mass production.
  5. The storekeeper has the right to refuse to go through the warehousing and receiving procedures for the personnel who fail to perform the provisions.
  6. The storekeeper should actively cooperate with the workshop production, communicate with the dispatcher in time, understand the production task, and do a good job in serving the front line.

【2】 Management of mold field use

  1. Dispatchers should handle the relevant procedures according to the corresponding management system when they receive and return the molds. They should be responsible for the whole process of the molds from receiving to returning to the warehouse.
  2. The die should be processed by punching machine of corresponding tonnage according to stamping process. The mold should be adjusted and installed by the mold adjuster, and ensure that the leakage is unobstructed, the spring top is normal, the feeding is convenient, and the stroke is reasonable. Only after the qualified samples are tested can the production be started.
  3. Punch workers in the work in strict accordance with the operating procedures. Any abnormal phenomenon found in the production process shall be reported in time, and the production shall be carried out after troubleshooting. In case of mold damage caused by rough operation, the responsible person shall fill in the mold accident responsibility sheet and give certain punishment.
  4. In case of any damage to the die and punch caused by the fracture of the die scrap, the deformation of the guide plate guide part and the blocking of the press bending die, the responsibility of the straightener shall be investigated.
  5. The usage of the mould should be made clear in the day shift and night shift. The successor shall be responsible for the responsible accident after the handover.
  6. After the completion of the production task, the dispatcher shall be informed to handle the warehouse returning procedures in time. The production site should not keep the mold without production order or completing the batch task. In case of mold loss, the responsibility of the final recipient will be traced. Dongguan machine parts processing

Purpose of mold maintenance system

  1. Master the history of the mold 2. Maintain the mold timely after the mold production 3. Improve the mold life 4. Ensure the mold quality and smooth production

Mold maintenance mode mold maintenance is divided into four modes. 1. Preventive inspection: every 15 days as a cycle cycle, directly check the mold status on the production machine, and record the results in the “mold preventive inspection record form”. This part of the inspection is in the charge of the mold group with the assistance of the injection molding department. 2. General maintenance (A-level maintenance): it refers to the general maintenance items of the mold during the daily mold test and trial production, and the production department is responsible for and records. 3. Regular quantitative maintenance (Level B maintenance): when the molds have not been used for more than one year or accumulated more than 50000 beers each time, detailed inspection shall be conducted, and the inspection results shall be recorded in the “mold maintenance inspection record form”. The production department is responsible for and does

Machining bearing with computer gong

  1. First, clean the bearing in gasoline and wipe off the oil sludge and dust left on the bearing. All bearings with rust are gently polished with metallographic sandpaper until there is no roughness by hand.
  2. Dry the cleaned bearings with dry rags, and then soak them in antirust oil. In the process of CNC machining, the bearing should be completely contacted with the antirust oil, and the bearing should not be stopped. Only in this way can the oil film formed by the antirust oil cover the surface of the bearing and achieve the purpose of antirust.
  3. Next, apply lithium grease and grease evenly on the surface of the bearing, including inner and outer rings, wheels and cages. And it is to wipe while rotating the bearing, so that the grease really into the bearing, play a full role in lubrication.

There are many ways to obtain the accuracy of measuring workpiece size in machining, one of which is the trial cutting method. What is its main operation?

That is, first try to cut out a small part of the machined surface, measure the size of the trial cut, adjust the position of the cutting edge of the cutting tool relative to the workpiece according to the processing requirements, and then cut again by CNC machining, and then measure again. After two or three times of trial cutting and measurement, when the machined size meets the requirements, the whole surface to be machined can be cut. The trial cutting method is repeated until the required dimensional accuracy is achieved through “trial cutting – Measurement – adjustment – re cutting”. For example, trial boring of box hole system.

The precision of the trial cutting method may be very high, it does not need complex devices, but this method is time-consuming (need to make multiple adjustments, trial cutting, measurement, calculation), low efficiency, depends on the technical level of workers and the accuracy of measuring instruments, and the quality is unstable, so it is only used for single piece and small batch production.

As a type of trial cutting method matching, it is based on the processed parts, CNC machining another matching workpiece, or combining two (or more) workpieces for processing. The final dimension to be processed in the matching process is based on the matching requirements of the machined parts.

Intelligent fault playback and fault simulation technology

Adaptive control technology of machining process: through monitoring the cutting force, power, current, voltage and other information of the spindle and feed motor in the process of machining, the traditional or modern algorithm is used to identify the force, wear and damage status of the cutting tool and the stability state of the machine tool, and adjust the processing parameters (spindle speed, feed speed) in real time according to these states In order to improve the machining accuracy, reduce the surface roughness and improve the safety of the equipment operation, the equipment is in the best operation state;

(2) Intelligent optimization and selection of processing parameters: the experience of process experts or technicians and the general and special laws of parts processing are used to construct the intelligent optimization and selector of processing parameters based on expert system or model. The optimized processing parameters can be obtained by using it, so as to improve the programming efficiency and processing level, and shorten the production preparation The purpose of time;

(3) Intelligent fault self diagnosis and self repair technology: according to the existing fault information, the application of modern intelligent methods to achieve rapid and accurate fault location;

(4) Intelligent fault playback and fault simulation technology: it can record all kinds of information of the system, replay and simulate all kinds of errors and accidents of CNC machine tools, so as to determine the causes of errors, find out solutions to problems, and accumulate production experience;

(5) Intelligent AC servo drive device: it can automatically identify the load and automatically adjust the parameters of the intelligent servo system, including intelligent Spindle AC drive device and intelligent feed servo device. The driving device can automatically identify the moment of inertia of the motor and load, and automatically optimize and adjust the parameters of the control system, so that the drive system can get the best operation;

(6) Intelligent 4m numerical control system: in the manufacturing process, the integration of processing and testing is an effective way to realize rapid manufacturing, rapid detection and rapid response. Measurement, modeling, manufacturing and machine operation (namely 4m) are integrated into one system to realize information sharing and promote measurement, modeling and addition Integration of tooling, clamping and operation.

  1. Open system

(1) Open to the future technology: because the software and hardware interfaces follow the recognized standard protocol, only a small amount of redesign and adjustment is needed, the new generation of general software and hardware resources may be adopted, absorbed and compatible by the existing system, which means that the development cost of the system will be greatly reduced, and the system performance and reliability will be continuously improved and will be in a long life cycle;

(2) Open to users’ special requirements: update products, expand functions, provide various combinations of hardware and software products to meet special application requirements;

(3) Establishment of numerical control standard: a new CNC system standard iso14649 (STEP-NC) is being researched and formulated internationally to provide a neutral mechanism independent of specific system, which can describe the unified data model of the whole product life cycle, so as to realize the standardization of product information in the whole manufacturing process and even in various industrial fields. The standardized programming language is not only convenient for users to use, but also reduces the labor consumption directly related to operation efficiency.

6-drive parallelization

Parallel motion machine tool overcomes the inherent defects of traditional machine tool series mechanism, such as high mass of moving parts, low system stiffness, tool can only feed along fixed guide rail, low degree of freedom of operation, and insufficient flexibility and mobility of equipment processing The length of the rod enables the platform supported by the bar system to obtain the corresponding degree of freedom movement, which can realize multi coordinate linkage NC machining, assembly and measurement functions, and can meet the processing of complex special parts. It has the advantages of high modularity, light weight and fast speed of modern robot.

As a new type of processing equipment, parallel machine tool has become an important research direction of current machine tool technology. It has been highly valued by the international machine tool industry. It is considered as “the most significant progress in the machine tool industry since the invention of numerical control technology” and “a new algebraic control processing equipment in the 21st century”.

  1. Extreme (large scale and miniaturization)

The development of national defense, aviation and aerospace and the large-scale of energy and other basic industrial equipment need the support of large-scale and good performance CNC machine tools. Ultra precision machining technology and micro nano technology are strategic technologies in the 21st century, and new manufacturing processes and equipment that can adapt to micro size and micro nano machining accuracy need to be developed. Therefore, the demand for micro machine tools, including micro cutting (turning, milling, grinding) machines, micro electro machining machines, micro laser machining machines and micro presses, is gradually increasing.

  1. Information exchange networking

For the enterprises facing fierce competition, it is very important to make CNC machine tools have bidirectional and high-speed network communication function, so as to ensure the smooth flow of information among various departments in the workshop. It can not only realize the sharing of network resources, but also realize the remote monitoring, control, training, teaching and management of CNC machine tools, but also realize the digital service of CNC equipment (remote diagnosis and maintenance of CNC machine tools, etc.). For example, Japan’s Mazak company has launched a new generation of processing center equipped with an external device called e-tower, including computers, mobile phones, external and internal cameras, which can realize the communication failure alarm of voice, graphics, video and text

Computer gong processing and maintenance

The high integration electronic components, chips and VLSI are the guarantee of reliability for large-scale machining equipment. Many functions are implemented by software, which reduces the number of hardware. Rich fault diagnosis and protection functions (mostly implemented by software), can reduce the frequency of system fault occurrence and repair time after failure.

  1. Convenient for processing, using and maintaining computer gongs

Easy to operate: the user of computer gong processing can operate correctly only according to the prompt of menu. Programming convenience: it has many functions of programming, automatic verification of program and simulation. Maintenance and maintenance is convenient: some daily maintenance work is carried out automatically (lubrication, regular inspection of key parts, etc.), and the self diagnosis function of CNC machine tool can quickly realize the accurate fault location.

  1. Computer gong processing is easy to realize Mechatronics

The volume of control cabinet of numerical control system is small (the number of hardware is reduced by computer; the integration degree of electronic components is higher and higher, and the hardware is decreasing constantly), which makes it possible to combine it with machine tool physically, reduce the floor area and facilitate operation.

  1. The computer gong processing has flexibility and universality

The function of machining equipment of mechanical parts is mostly realized by software, and the software and hardware adopt modular structure, which makes the modification and expansion of system function more flexible. The basic configuration of the machining equipment is universal. Different CNC machines only have specific function modules to realize specific control functions.

  1. Computer gong processing has rich numerical control functions

Interpolation function: quadratic curve, spline, spatial surface interpolation

Compensation function: motion accuracy compensation, random error compensation, nonlinear error compensation, etc

Human machine dialogue function: dynamic and static tracking display of processing, advanced man-machine dialogue window

Heat treatment of metal processed by computer gong

According to the different heating medium, heating temperature and cooling method, each category can be divided into several different heat treatment processes. The same metal with different heat treatment process can obtain different microstructure and different properties.

Steel is the most widely used metal in industry, and the microstructure of steel is also the most complex. Therefore, there are many kinds of heat treatment processes for steel.

Integral heat treatment is a metal heat treatment process that heats the workpiece as a whole and then cools it at a proper speed to change its overall mechanical properties. There are four basic processes of heat treatment of iron and steel: annealing, normalizing, quenching and tempering.

Annealing is to heat the workpiece to the appropriate temperature, adopt different holding time according to the material and size of the workpiece, and then cool it slowly. The purpose is to make the internal structure of the metal reach or close to the equilibrium state, and obtain good process performance and performance. Computer gong processing, Dongguan computer Gong processing, Shenzhen computer gong processing, mechanical parts processing, Guangzhou computer gong processing

Or to prepare for further quenching. Normalizing is to heat the workpiece to a suitable temperature and then cool it in air. The effect of normalizing is similar to that of annealing, but the microstructure is finer. It is often used to improve the cutting performance of low-carbon materials, and sometimes used as the final heat treatment for some parts with low requirements.

Quenching is the rapid cooling of the workpiece in water, oil or other inorganic salt, organic water solution and other quenching media after heating and holding. After quenching, the steel parts become hard but brittle at the same time. In order to reduce the brittleness of steel parts, the quenched steel parts are kept at a proper temperature higher than room temperature but lower than 650 ℃ for a long time, and then cooled. This process is called tempering. Annealing, normalizing, quenching and tempering are the “four fires” in the whole heat treatment. Quenching and tempering are closely related and often used together.

With the different heating temperature and cooling methods, different heat treatment processes have evolved. In order to obtain certain strength and toughness, quenching and high temperature tempering process is called quenching and tempering. Computer gong processing | Dongguan computer gong processing | Shenzhen computer gong processing | mechanical parts processing | Guangzhou computer gong processing

Some alloys are quenched to form supersaturated solid solutions, which are kept at room temperature or a little higher temperature for a long time to improve the hardness, strength or electrical magnetism of the alloys.

Computer gong processing mold injection

After the injection molding, the film and plastic are integrated. The wear-resistant material is on the outside. This process is mostly used in the mobile phone display screen. The plastic materials are mostly PC, PMMA, PBT, etc., which mainly have the function of wear resistance and scratch resistance. There is also a technology called IML (in-mold-lable), which is roughly the same as IMD, except that flim is pulled out like a punched tape after injection molding, which just transfers the printed pattern to the plastic parts, also known as in mold transfer.

There are two main types of IMD. One is PC and single chip. The other is pet, chain like (like film or printed instant noodle pockets).

The former finished product is merge PC chip, the latter only takes the ink on the pet chain, but PET material (chain, also known as foil) is not imported into parts by merge.

The former can only be screen printed because of the thick PC, so the effect is rough. For example, the front shield shape of Motorola v66 is already very delicate, while the latter can be printed with offset plate due to its thin pet, which is very fine, especially electroplating and transparent, fine metal and surface texture are very good, such as the front electroplating and black texture effect of Motorola V60.

For example, the control panel on Matsushita rice cooker mold is a typical IMD, which puts a silk screen printed PET film into the injection mold for injection molding. The materials are PC, transparent ABS and PMMA. After injection molding, the film and plastic are combined into one.

Nowadays, most of the outer screen lenses of mobile phones adopt IMD technology, and the cost is correspondingly increased. The requirements of mobile phone molds, especially transparent molds, are more stringent.

Generally speaking, there are two background reasons for using IMD,

  1. Some effects of injection molding are difficult to simulate, such as the walnut automobile dashboard (car parts mold).
  2. It is very difficult to integrate several effects on small pieces of parts. For example, the front triangle of moto V60 mold concentrates on electroplating, transparency and screen printing, but it also requires delicacy. Imagine that it is very difficult to use real plating, injection molding and splicing of transparent pieces.

Another method is to make the outer surface smooth and the inner surface rough, but there are some requirements for the mold.

Machining thin wall mould with computer gong

In a broad sense, it refers to the process that all products can be manufactured by mechanical means; in a narrow sense, it refers to the process of making parts by special machinery such as the lathe, milling machine, drilling machine, grinding machine, stamping machine, die-casting machine, etc.

There will be some errors in machining. Let’s talk about the original error related to the initial state of the process system itself

① Principle error is the error of machining method.

② Geometric error of process system

The relative position errors between workpiece and tool exist in static state, such as manufacturing error of tool and fixture, adjustment error and installation error;

The relative position error of workpiece and cutter exists in the motion state, such as the spindle rotation error of machine tool, the guide error of guide rail, the transmission error of transmission chain, etc.

The deformation caused by the force effect of the process system, such as the deformation caused by the stress deformation of the process system and the deformation caused by the generation and disappearance of the internal stress of the workpiece.

② Deformation caused by thermal effect of process system, such as the error caused by thermal deformation of machine tool, cutting tool and workpiece. In the machining process, when the position relationship between the tool and the workpiece processing surface is reasonable, the machining surface accuracy can meet the processing requirements, otherwise it can not meet the processing requirements. CNC machining accuracy analysis is to analyze and study various factors when the machining accuracy cannot meet the requirements, that is, the possibility of various original errors, and take effective technological measures to overcome them, So as to improve the machining accuracy.

Digital position control of computer gong processing

At present, digital AC servo system is widely used in CNC machine tools. The digital servo drive module and servo motor constitute a high precision angle closed-loop servo system. Its input is the command pulse given by the CNC system, and the output is the motor angle. Under the closed-loop control with optical encoder as feedback link, the rotation angle of motor shaft will strictly follow the change of command value, and the angular displacement of motor will be converted into the required linear displacement of worktable through gear pair and screw nut pair.

Although the digital servo system with rotation angle as output is a closed-loop system, the position control system composed of it is an open-loop system (or semi closed-loop system) from the perspective of taking the displacement of machine tool table as the final controlled value. Therefore, the position control accuracy is not only related to the performance of the control system, but also largely depends on the mechanical structure of the machine tool. In this way, the error of information transmission link, the error of mechanical transmission link and the influence of various non-linear factors in the system will make the table displacement deviate from the command value, and the open-loop system can not effectively correct it. Therefore, even if the conventional CNC machine and the machine use high-performance digital servo system, it is difficult to achieve high machining accuracy.

2、 Composition of digital full closed loop position control system

In order to solve the above problems, this paper proposes a digital full closed-loop position control method. Its basic idea is: on the basis of the digital drive of the moving parts of the machine tool, the digital measurement link which directly detects the final displacement of the moving parts is introduced to fully obtain and use the system information to count the motion of each coordinate of the machine tool from the perspective of feedback control The digital closed-loop system consists of various error sources and nonlinear links. In this way, the system can not only make the positioning accuracy of moving parts determined by the measurement accuracy of the detection link, but also make effective dynamic correction for the influence of various interference and non-linear factors on the displacement of moving parts, so that the actual displacement of the moving parts at any time always follows the change of the command value, so as to ensure the high dynamic and steady-state accuracy of the movement of the machine tool coordinates Degree.

The basic composition of the digital closed-loop position control system is shown in Fig. 2. The system uses grating as the linear displacement detection device to directly obtain the displacement information of the machine tool table. After preprocessing, the two-way displacement pulse signals with phase difference of 90 degrees are obtained. The frequency is directly proportional to the displacement speed of the worktable, and the number is the actual displacement of the worktable divided by the pulse equivalent. The displacement pulse is sent to the reversible counter for counting, and the count value in the counter represents the current actual position of the worktable. The function of the position controller in the system is to control the operation of the whole system according to the difference between the given position value and the position feedback value according to the digital control law designed in advance, so as to ensure that the displacement of the worktable strictly follows the instruction value.

3、 Dynamic structure and controller design of the system

The generalized object is composed of zero order holder, pulse generator, digital AC servo system and mechanical moving parts. Among them, the zero order holder plays a bridge style of connecting discrete link (digital controller) and continuous link. The task of pulse generator is to generate command pulse to control the operation of AC servo system according to the control signal given by the position controller, so this link is a proportional link.

AC servo system is a digital driving device in the system. From the macroscopic point of view, there is an integral relationship between the angle θ of servo motor and the command pulse frequency f, but the inertial characteristics between θ and F should be further considered from the microscopic point of view. The function of mechanical moving parts is to convert the rotation angle of the motor into the linear displacement of the worktable. If the influence of transmission error and nonlinear factors is treated as the dynamic disturbance to the system, the link can also be regarded as a proportion link. In this way, the transfer function of the generalized object can be expressed as a feedback channel after proper processing, although it includes detection device, pre-processing, information transfer, reversible counting and many other links, involving more complex information processing process.

But from the point of view of taking the actual position of the worktable as the input and the position feedback value (the count value in the reversible counter multiplied by the pulse equivalent) as the output, the feedback channel can be regarded as a proportional link, and its transfer function GF (s) = l can be made by proper design. Considering that the generalized object is a third-order system with an integral part, in order to make the closed-loop system composed of it have fast dynamic performance and no steady-state error of tracking slope input, PID controller is used as position controller