EPC is an abbreviation for edge position control. During the high-speed transmission process, the EPC web guiding system is used to manipulate and correct the direction deviation of the coil raw material. It performs real-time testing, active tracking, and active correction.
What Causes Acceleration Offsets In The Process Of The Edge Position Control
One of the most troublesome edge position deviations is known as the acceleration offset. When the machine speed is increased or decreased, the web moves sideways. The rate of movement is usually greatest at the top and bottom of the speed difference rather than on the speed ramp itself. Unfortunately, the term “acceleration offset” misrepresents the true nature of the edge movement. Indeed, the web has no idea how fast it is moving.
The various web tracks through a machine shown in Figure 6 illustrate the cause of most acceleration offsets. We demonstrate how the web moves through a machine with one of the rollers misaligned. When there is absolute traction, the web will follow the Normal Entry law on all rollers, including the misaligned one. Take note of how the web shifts as a result of this misalignment. However, in the case of pure flotation, the web is not steered by the ‘roller’ and thus passes directly through the machine. The case of sliding is intermediate in that there is a small offsetting of the web.
As a result, every roller or element that touches the web also steers it. The path of the web, on the other hand, will remain constant if the roller is stationary and the state of traction is constant. That is not to say it is straightforward. The web will obviously snake through the machine in accordance with web handling laws. What we mean is that the path will, for the most part, remain consistent.
However, if the web switches from full to partial tracking, the web’s path will shift slightly in response. This shift in traction will be subtle and difficult to detect using traditional observations and measurements. Nonetheless, it will move the web in response.
The EPC web guiding system provides edge alignment to avoid deviation of the waterproof coiled material during the entire production and processing process, as well as ensuring accurate and stable performance of the waterproof coiled material during the entire production process with the neatly divided rewinding machine.
The control board can choose the method of tracking the edge or line based on the various raw materials and choose the electric eye test to take into account the requirements of various raw materials.
How Does The EPC Web Guiding System Work
A sensor, an actuator, and a controller comprise a web guiding system. Any detector that can reliably detect the edges of a web can be used as the sensor. Pneumatic (nonporous webs), photoelectric (opaque webs), and paddies are the most common (thick webs). Through the edge sensor, the web must be flat (no curl) and stable (no flutter). The sensor is frequently placed near a roller for this and other reasons. The web could be guided to the front edge, back edge, or center if two sensors are used.
The sensor’s output is routed to a controller, which sends a movement command to the actuator. If the controller’s gain is too low, the guide’s response will be sluggish and slow to correct. If the controller’s gain is too high, the guide will be hot but overshoot, and may even be unstable. For smaller assemblies, the actuator may be a stepper motor and ball-screw, while for larger assemblies, it may be a hydraulic cylinder. For responsive operation, the actuator and framework must be stiff.
Professional EPC Web Guiding System Provider- Arise
Arise is a leading EPC web guide system manufacturer in China. High-accurate Arise web guiding can ensure continuous, precise control of various coil materials in various manufacturing processes, ensuring that the material does not deviate from the correct position and minimizing waste and downtime.
The technical operation for the coil materials that must always keep the edge of the coils neat and consistent during the spraying, printing, punching, laminating, slitting, or other coil winding processes is referred to as web guide control. The equipment used in the guiding process is a collection of web guiding control system. A common system consists of a controller, a sensor, a guide mechanism, and a driver.
Webs do not always track down through a machine in the same place. Any offsets in the unwinding roll, for example, will cause the web to start through a machine in a variable CD (cross direction) position on a roll-to-roll operation. Even if a web begins in the position, it may take slightly different paths through the machine depending on a variety of factors.
First, a variably baggy or cambered web will cause the web to track toward the variably tighter side. Second, variations in roller traction or drag can cause web steering. Third, changes in tension will affect how straight the web travels downstream. At zero tension, edge position control is essentially lost. Other edge movement factors include nip roller draw variations, aerodynamics, and so on.
Web guides are used to move the web’s edge or center to a specific CD position. The guide location could be at an unwind to start the web down through a machine in a consistent position, an intermediate location, or the winder to improve roll edge quality. The guide’s accuracy requirements can range from simply keeping the web on the rollers to minimizing trim loss and registering multiple print colors to within a few mils. Guides can be active or passive.
Working Of Web Guiding Control System
The purpose of the web guiding is to direct the sensor to emit infrared or ultrasonic radiation in order to monitor the operation of the coil material and send a signal to the controller. After the controller determines that the web has a positional deviation, the controller controls the drive system to swing to correct the web position using the preset command.
Brushless DC servo motor drive, precision ball screw drive, compact structure, good mechanical rigidity, low inertia, suitable for high-speed and high-precision guide are used in the web guiding system.
A controller, a sensor, an electric driver, and a correction guide mechanism comprise the system. The sensor detects the coil material’s edge position and reads the deviation between the actual and set positions, converting the deviation into a voltage signal proportional to it. The signal is then sent to the controller. After the signal is amplified and calibrated by the controller, the signal is output to the electric driver, and the electric driver drives the guide mechanism to perform correction actions according to the magnitude of the input signal to guide the coil material to the preset position.
Advanced Web Guiding Control System From Arise
Arise is a leading manufacturer in China, offering advanced web guiding control system. It is suitable for paper, non-woven fabric, plastic film, self-adhesive label tape, aluminum platinum, hot-rolled strip steel, and other applications. To ensure the neat division of the rewinding machine, the edge or marking line should be tracked and guided by the control border. The photoelectric correction manipulator uses a universal photoelectric controller for edge and line alignment, as well as imported drive machinery and a high-precision controller to control and maintain the edges or lines in a specific direction. The operation of the web guiding machine is simple, with high precision and reliability.
Multiple layers of materials must be neatly bonded together in the production of coil materials, or else waste or jams will occur. The web guiding system is capable of multi-layer material alignment, zero waste in the refueling process, and no jams. The web guide is a programmable correction controller that tracks the material’s edge or printing lines for high-accuracy swing.
Working Principle of Web Guiding System
A closed-loop controller is used by the web guiding system. First, the sensor detects the coil’s edge or line, and the system automatically reads the deviation between the coil’s actual and setting positions and converts the offset into an electrical signal. The signal is then sent to the controller. The signal is then calibrated by the controller and sent to the linear driver. The linear driver drives the deviation correction according to the magnitude of the signal. Then the guide mechanism adjusts the coil to the set position. The drive signal of the current drive is only proportional to the deviation of the coil, which makes it possible to provide precise control for various coils.
Applications of Web Guiding System
The web guide system is used in a variety of industries, including packaging, printing, labels, building materials, paper pulp, non-woven fabrics, and corrugated paper processing.
Characteristics of Web Guiding System
1. Brushless servo motor, no maintenance required
2. Accurate ball screw
3. The guide roller’s length and span can be adjusted.
4. The most difficult-to-detect material can also be easily controlled.
5. The tracking speed can be adjusted arbitrarily without affecting the belt shaft’s size.
6. The semi-fast voltage and electric current feedback function can automatically restore and protect the internal circuit system, with good stability and quick action response.
High-performance Arise Web Guiding System
Arise is a leading web guiding system manufacturer in China with an audited R&D team. Using Arise’s high-precision web guiding equipment, you can ensure continuous and accurate edge position control of multi-layer non-woven fabric in various production processes while keeping the machine running at full speed.Deviation of coil materials may occur during the uncoiling, technological processing, winding, and other processes due to deviation of the coil itself or the processing machine. The web guiding system offers a solution for reducing the occurrence of such incidents. It constantly monitors the position of the coil material during production and makes real-time corrections. The web guiding machine can ensure and improve product quality and efficiency.
Why The Web Guiding Machine Important
Flexo printing machines frequently use an automatic web guide machine to ensure that the printing material enters the printing unit in a stable horizontal position. It can detect and correct a 0.5 mm deviation in a specific horizontal edge position of the printing material in real-time. Photoelectric sensors are commonly used for opaque materials such as paper and aluminum foil, while ultrasonic web guide sensors are used for transparent materials such as films. Once the printing material enters the printing and die-cutting rewinding areas, the installation accuracy of the own processing machine and the parallelism between the rollers ensure the stability of its horizontal edge position.
How Does The Web Guiding Machine Work
The web guiding machine controls the position deviation of the thin material during the conveying process with a constant-speed motor. If the material’s winding speed needs to be changed, the correction speed cannot be changed, which easily leads to the phenomenon that curling cannot be corrected. In addition, the microcomputer photoelectric deviation correction web guiding system can meet the needs of customers.
A computer-controlled photoelectric correction controller, color discrimination tracking photoelectric, ball screw, and synchronous motor are all part of the web guide system. The computer-controlled photoelectric correction system’s MCU control has a frequency conversion output that can adjust the motor speed based on the needs. In terms of production, the structure is simple, easy to use, convenient, and practical.
1. When winding, track the edge of the substrate and correct any unevenness.
2. Keep the coating material equidistant from the substrate’s edge by tracking it.
3. The correction speed can be adjusted to keep in balance with the roll speeds of different materials.
Technical Parameters of The Web Guiding Machine
1. Support three operational methods such as line tracking, edge tracking, centering tracking, and so on.
2. Photoelectric sensor, ultrasonic sensor, and CCD sensor support
3. Automatic detection of sensor parameters; in most cases, there is no need to calibrate the sensor.
4. Automatic stroke measurement in the absence of a mechanical limit switch
5. Extremely fast response time of 500 microseconds (0.5 milliseconds)
The ball screw is driven by a DC servo motor.
7. Save 10 groups of different material parameters for easy and quick material switching.
8. Three-language menu operation in simplified Chinese, traditional Chinese, and English.
9. Humanized operation, quick and easy.
10. PLC/human-machine interface networking control support.
Web Guiding Machine Expert – Arise
Arise is a China web guide machine manufacturer, and Arise web guiding can ensure continuous, precise control of various coil materials in various production processes. With the high-performance automatic Arise web guide control system, it is possible to ensure that the material does not deviate from the correct position while minimizing waste and downtime.
To ensure that the web tension of the whole corrugated paper production line can meet the requirements of the maximum speed, realize the fast alignment and fitting of the base paper, and minimize the trimming, the carton factory is paying more and more attention to the purchase of the web guide and tension control system. If the corrugated paper production line can be well controlled by the web guide system, it can greatly reduce material waste and save production costs.
Why Use Web Guide And Tension Control System When Building Corrugated Paper Production Line
In recent years, the corrugated box packaging industry has changed significantly. The equipment speed of the production line is becoming faster and faster. In the past, the speed of 100m/min and 150m/min has been called high speed. But now, the speed of 200m/min and 300m/min have been realized.
How to save energy more intelligently and produce high-quality products at the same time is the biggest challenge faced by carton factories, especially those with corrugated paper production line. Many practical application examples in the paperboard factory have confirmed that the web guide control system can play a significant role in reducing the waste paper volume, improving the production speed, and improving the quality of the finished paperboard products in the paperboard factory. It means uniform tension, accurate fit, small trimming and higher speed.
The paperboard factory is equipped with a web guiding control system when the new production line is installed to ensure the improvement of the machine efficiency. The application of the corrugated paperboard web guide and tension control system has brought benefits to many paperboard factories. More and more factories regard the web guide and tension control equipment as the necessary equipment for production line construction.
Configuring The Whole Line Web Guide And Tension Control System To Bring Huge Cost Savings.
Many factories pay more attention to the production loss of defective products but pay less attention to the trimming loss. They think it is inevitable that it is not produced by workers. However, the trimming loss can be greatly reduced through the configuration of the whole line web guide and tension control system.
The web guide and tension control system is to control the real-time monitoring and automatic alignment or centering operation of the single-sided machine, double-sided machine and slitter, so as to reduce the loss caused by the amount of uneven edges and trimming.
Web Guide Control of Single-sided Machine
Monitor the position of the core paper entering the single-sided machine in real-time, controlling the position of the base paper balancer or move the base paper holder in real time. Adjust the consistency between the inner paper and the core paper, and reduce the uneven edge loss.
Web Guide Control of Double-sided Machine
Real-time monitoring of the position of the paper into the double-sided machine, real-time adjust the web guide controller to keep the movement of the pit paperboard consistent with the paper.
Web Guide Control of Slitter
Monitor the position of the paperboard entering the slitter in real time, controlling the mobile slitter to keep consistent with the paperboard in real time.
After configuring the whole line web guide and web tension control system, the loss of edge-leveling is only 1/3 of the manual operation control
Manually control the adjusted edge trimming amount, that is, the length required for paperboard edge trimming is 10-15m. The edge-leveling quantity of the whole line web guide control, that is, the length required for paperboard edge-leveling, is 3-5m.
Professional Web Guide And Tension Control System Manufacturer – Arise
Arise is one of the leading manufacturers of web guide and tension control system. It can provide comprehensive solutions to the web guide problems from the processing of textile, paper, corrugated cardboard, plastic film, rubber, tire, metal film and non-woven fabric and other materials. Arise has accumulated rich experience and knowledge in the production process of corrugated cardboard, from standard basic equipment of web guide and tension control to the new generation of automatic detection and intelligent production line quality control management system, which has brought great help to the corrugated paperboard factories and help them save huge production costs.