In advanced smart garden systems and autonomous outdoor machinery like electric lawnmowers and robotic gardening devices, crystal oscillators play a vital yet often overlooked role. These precision components are essential for maintaining synchronized communication, reliable signal processing, and stable timing in environments where vibration, temperature fluctuations, and moisture are inevitable. In the context of industrial-grade or consumer-grade satisfactory performance for outdoor automation, the role of oscillators extends far beyond basic clock generation.

Precision Timing in Harsh Environments

Crystal oscillators serve as the timing backbone for embedded systems, microcontrollers, and wireless communication modules used in robotic lawnmowers and automated garden machines. These devices often operate under direct sunlight, in fluctuating weather, or on rough terrain, requiring clock components that can function reliably across wide temperature ranges, typically from -40°C to +85°C or even higher. Standard oscillators may drift or fail under such conditions, leading to disrupted operations, signal errors, or uncoordinated motion control.

For instance, in brushless DC motors (BLDCs) used to drive the wheels or cutting blades of smart garden robots, precise pulse-width modulation (PWM) control is necessary. This is only possible if the oscillator stability remains intact despite environmental stress.

Vibration Resistance and Mechanical Reliability

Unlike indoor electronics, outdoor robotics such as autonomous mowers are constantly exposed to mechanical shock and vibration. When cutting grass or navigating uneven terrain, vibrations can interfere with sensitive timing circuits. Vibration-resistant crystal oscillators, often constructed with ruggedized ceramic or metal packages and epoxy-sealed joints, are engineered to minimize mechanical resonance that would otherwise cause timing jitter or data corruption.

These oscillators typically follow stringent MIL-STD-202 or AEC-Q200 testing protocols to ensure operational integrity in mobile or semi-industrial systems. Their mechanical resilience contributes directly to the long-term satisfactory performance and operational lifespan of smart gardening devices.

Moisture Protection and Long-Term Reliability

Outdoor automation must also contend with high humidity, rainfall, or dew accumulation. Moisture intrusion is a silent killer for electronic circuits, especially those responsible for high-frequency signal integrity. To address this, moisture-resistant crystal oscillators with hermetic sealing or advanced conformal coatings are preferred. These protective features prevent condensation from interfering with the quartz element’s vibration or shorting internal circuits.

In embedded RF modules used for Wi-Fi, Bluetooth, or proprietary communication systems, a moisture-compromised oscillator could lead to packet loss, unstable connections, or reduced range. Therefore, environmental protection in oscillator packaging is not just a matter of durability but also a prerequisite for uninterrupted connectivity.

Synchronization in Multi-Sensor Systems

Electric gardening robots often integrate multiple sensors—ranging from ultrasonic, LIDAR, GPS, to inertial measurement units (IMUs)—for autonomous navigation and object avoidance. These modules rely on tightly synchronized signals to calculate position, detect edges, or plan efficient mowing paths. Low phase noise crystal oscillators help maintain timing consistency across these modules, enabling real-time decision-making.

Without accurate frequency sources, sensor data fusion becomes unreliable, leading to behavior such as inaccurate mapping or inefficient path tracking—negatively affecting system performance.

Energy Efficiency and Signal Stability

In battery-powered robotic garden equipment, power consumption is a critical design constraint. Low-power crystal oscillators, such as temperature-compensated (TCXO) or micro-power variants, ensure that timing functions remain stable without significantly draining the battery. These oscillators are often used in real-time clocks (RTC) and sleep-wake cycles of the main control unit, allowing intelligent power management strategies to extend operational time between charges.

Moreover, maintaining signal stability over long periods helps avoid unnecessary recalibrations or software interruptions, contributing to the overall operational satisfaction of the end-user.

Crystal oscillators used in smart gardening equipment like electric lawnmowers and autonomous garden robots must meet demanding requirements in terms of temperature tolerance, vibration resistance, and moisture protection. Their role is foundational to ensuring signal integrity, synchronization, and energy efficiency in these mobile, outdoor platforms. As garden automation becomes increasingly sophisticated, the need for robust and high-precision timing components becomes even more crucial—making crystal oscillators indispensable for achieving long-term satisfactory performance in real-world applications.

In the vast world of packaging materials, plastic woven valve bags are becoming an indispensable packaging choice for many industries with their excellent performance and constantly innovative technology. Today, let us take a deep look at the technical characteristics, application fields, and potential market trends of plastic woven valve bags. ​

1. Application fields

Plastic woven valve bags play an important role in many fields with their unique advantages. ​

The backbone of the packaging industry

In the packaging industry, plastic woven valve bags are widely used in the packaging of various products. In terms of food packaging, it can provide safe, hygienic and beautiful packaging for powdered or granular foods such as flour and rice. Its good sealing effectively prevents food from getting damp and deteriorating, and extends the shelf life of food. In the field of chemical raw material packaging, the high strength and corrosion resistance of plastic woven valve bags make it an ideal choice for packaging chemical products such as soda ash and fertilizers, ensuring the safety of hazardous chemicals during storage and transportation.

A powerful assistant in the agricultural field

Plastic woven valve bags are also indispensable in agricultural production. The packaging of pesticides, fertilizers and other materials requires extremely high performance of bags. Plastic woven valve bags can not only bear the weight of these materials, but also effectively prevent leakage and protect the quality of agricultural production materials. At the same time, in the packaging and transportation of agricultural products, such as potatoes, sweet potatoes and other agricultural products, plastic woven valve bags have become the first choice of farmers because of their durability and low cost. ​

A reliable partner in the logistics industry​

With the vigorous development of the logistics industry, the demand for packaging materials is also growing. Plastic woven valve bags are an ideal choice for packaging all kinds of goods in logistics transportation because of their lightness, strength and easy stacking. It can effectively protect the goods from damage during transportation, while facilitating handling and storage, and improving logistics efficiency. ​

2. Market trends​

Facing the rapid development of science and technology and the continuous changes in market demand, plastic woven valve bags are striding towards intelligence, green environmental protection and personalized customization. ​

Intelligent development leads industry change​

In the future, plastic woven valve bag printing machines will be more intelligent. By introducing automated control and remote monitoring technology, the production process will become more precise and controllable. Operators can remotely monitor the operating status of the equipment in real time and adjust production parameters in time to ensure the dual improvement of production efficiency and product quality. This intelligent development trend will make the production of plastic woven valve bags more efficient and stable, bringing greater competitive advantages to enterprises. ​

Green environmental protection, practicing social responsibility ​

Today, with the increasing awareness of environmental protection, green environmental protection has become an inevitable trend in the development of the packaging industry. Plastic woven valve bags will pay more attention to the use of environmentally friendly materials and energy-saving technologies. For example, using degradable plastic raw materials to reduce pollution to the environment; optimizing production processes and reducing energy consumption. This green and environmentally friendly development direction not only meets the society's requirements for sustainable development, but will also win more market recognition and consumer favor for enterprises. ​

Personalized customization to meet diverse needs ​

With the increasing diversification of consumer needs, the market demand for personalized printing products is also increasing. Plastic woven valve bags will adapt to this change and provide more flexible and diverse printing solutions. Enterprises can customize unique patterns, logos and texts according to customer needs, making valve bags an important carrier for displaying corporate brand image and product characteristics. This personalized customization service will open up a broader market space for enterprises and meet the personalized needs of different customers.​

In summary, plastic woven valve bags have occupied an important position in the packaging industry with their excellent technical performance and wide application fields. In the future, with the continuous innovation of technology and the continuous changes in market demand, plastic woven valve bags will continue to play a key role in promoting the progress and development of the entire packaging industry. Let us look forward to plastic woven valve bags creating more excitement in the future!

In the production of plastic woven valve bags, the printing process directly affects the appearance, texture and market competitiveness of the product. As the core equipment for printing plastic woven fabrics and composite films, the "satellite" and "stacked" layouts of web-fed gravure printing machines have different focuses in the field of plastic woven valve bags. Gachn will focus on the characteristics of these two models in the printing of plastic woven valve bags to help you find a more suitable production tool.

Plastic woven valve bags are widely used in chemical, building materials, food and other industries because of their moisture resistance, load-bearing and sealing properties. The printing substrate is mostly plastic woven fabric (PP/PE woven fabric). The surface of this type of material is relatively rough, the thickness is relatively uniform, but there is a certain degree of ductility, which puts forward special requirements for the adaptability of printing equipment. According to the arrangement of the printing unit, the mainstream gravure printing machine is divided into satellite type and stacked type, and both have their own advantages in the production of plastic woven valve bags.

1. Satellite web-type gravure printing machine: the "stabilizer" for high-precision printing of plastic woven valve bags

The satellite structure, with its "all stars around the moon" layout, is ideal for printing plastic woven valve bags that require high overprint accuracy.

Core structure

All gravure plate cylinders are arranged around a central impression cylinder, like satellites around a planet. For plastic woven valve bag printing, 4-6 printing units are usually configured to meet the multi-color pattern requirements of most products.

Workflow

After the plastic woven base material (woven fabric or composite woven film) is unwound from the feeding section, it enters the printing area through the tension control roller, closely adheres to the surface of the central impression cylinder, and passes through each printing unit in turn to complete multi-color overprinting. For valve bags that need double-sided printing (such as brand patterns on the front and product instructions on the back), the reverse printing device can be used to achieve efficient production of "single-sided single color + other side multi-color", and finally rewound into rolls by the receiving section.

The core advantages of plastic woven valve bags

（1）High overprinting accuracy and fit to rough surface: There are warp and weft lines on the surface of plastic woven fabric. The satellite-type central embossing roller is rigid, which can make the substrate evenly stressed and reduce the overprinting deviation caused by the unevenness of the woven layout. It is especially suitable for printing valve bags with fine text, QR codes or complex patterns (such as warning signs of chemical products and brand logos of grain packaging).

（2）Reduce substrate stretching deformation: Although the ductility of plastic woven fabric is lower than that of film, it may still be slightly stretched due to uneven tension during high-speed printing. The satellite-type single roller transmission throughout the whole process greatly reduces the risk of stretching and avoids "elongation" or "misalignment" of the pattern.

（3）Stability is suitable for mass production: Plastic woven valve bags are mostly batch orders. The satellite-type single embossing point reduces tension fluctuations, which can ensure the consistency of long-term continuous printing and reduce the scrap rate.

Limitations in the field of plastic weaving

（1）Drying efficiency is challenging for thick substrates: woven fabrics and composite films absorb a large amount of ink, while the satellite unit spacing is short, and the drying space for solvent-based inks is limited. A powerful drying system (such as high-temperature hot air circulation) is required, otherwise "smudge" problems may occur.

（2）Maintenance adaptability is slightly weaker: In woven printing, the printing plate is easily attached to the fluff of the woven fabric and needs to be cleaned frequently. However, the compact structure of the satellite results in a small operating space, and the cleaning and plate changing efficiency is slightly low.

Applicable to plastic woven valve bag scenarios

（1）Industrial-grade valve bags (such as cement bags and chemical raw material bags) made of thick woven fabrics or coarse textured substrates;

（2）Customized orders requiring complex patterns with more than 8 colors or special processes (BOPP lamination);

（3）Manufacturers that print valve bags with a width of ≥1 meter, or that produce multiple substrates such as paper and non-woven fabrics.

2. Stacked web-feed gravure printing machine: a versatile tool for flexible production of plastic woven valve bags

The stacking type is designed with independent units like "stacked" and is more flexible in the diversified production of plastic woven valve bags.

Core structure

The printing units are stacked vertically on the main wallboard, and each unit is equipped with an independent impression cylinder, which is uniformly driven by a gear system. For the plastic woven industry, 2-8 color groups can be flexibly configured, and even auxiliary units such as cold stamping and lamination can be added.

Workflow

After unwinding, the plastic woven substrate passes through the stacked printing units in sequence according to the preset path, and each unit completes one-color printing. Due to the large spacing between units, there is enough space for the substrate to pass through the drying device after printing before entering the next color group. The receiving department can choose ordinary rewinding or reserve tension for subsequent bag making processes according to needs.

Core advantages of plastic woven valve bags

（1）Fully dried, suitable for thick substrates: plastic woven cloth absorbs a large amount of ink, the stacked unit spacing is wide, and a multi-stage drying system (such as infrared preheating + hot air drying) can be installed to ensure that the ink is thoroughly dried, especially suitable for industrial valve bags printed with solvent-based inks.

（2）Easy operation and maintenance: The independent unit design makes plate changing and cleaning more convenient. When dealing with the common "fluff pollution" problem in plastic woven printing, the machine can be quickly stopped for cleaning to reduce production interruption time.

（3）Flexible expansion to meet customized needs: plastic woven valve bags often need to add color groups (such as 8-color complex patterns) or add special processes (such as local UV varnish to improve wear resistance) according to customer requirements. The stacked type can be easily expanded and configured to adapt to small batches and multiple batches of customized orders.

（4）Adapt to wide-format substrates: For printing of large-size valve bags (such as width ≥1 meter) in the chemical and building materials industries, the stacked type has more advantages in wide-format stability.

Limitations in the field of plastic weaving

(1) High requirements for tension control for overprinting accuracy: Plastic woven fabrics are transferred between multiple independent impression cylinders over a long path. Improper tension control may cause overprinting deviations, and a high-precision tension control system (such as magnetic powder brake + tension sensor) is required.

(2) Increase in equipment height workshop requirements: The vertical stacking structure results in a high equipment height, and it is necessary to ensure that the workshop has sufficient floor height (usually ≥4 meters).

Applicable to plastic woven valve bag scenarios

（1）Industrial-grade valve bags (such as cement bags and chemical raw material bags) made of thick woven fabrics or coarse textured substrates;

（2）Customized orders requiring complex patterns with more than 8 colors or special processes (BOPP lamination);

（3）Manufacturers that print valve bags with a width of ≥ 1 meter, or that produce multiple substrates such as paper and non-woven fabrics.

3. Satellite type vs. stacked type: comparison of core indicators of plastic woven valve bag printing

Conclusion: The key to selecting plastic woven valve bag printing

Satellite and stacked gravure printing machines are not "either this or that" in the production of plastic woven valve bags, but "precisely matched" according to product requirements. If your order focuses on fine patterns, thin composite substrates, and batch stability (such as food-grade valve bags), the satellite type is the first choice to ensure quality; if it focuses on thick substrates, multi-color customization, and wide-format production (such as industrial ton bag valve mouth printing), the stacked type can better improve production flexibility. In the plastic woven valve bag industry, the core of equipment selection is "adapting product characteristics and order models" - only by understanding the essential differences between satellite and stacked types can the printing process become a plus point to enhance product competitiveness. To learn more, click on the official website to contact us.

In the plastic weaving packaging industry, laminating technology is a key link in improving product performance. Whether it is a common waterproof ton bag or a delicate BOPP film composite packaging, the precise operation of the laminating machine is indispensable. Today, we will deeply analyze the working principles of laminating machines and BOPP film laminating machines in the plastic weaving industry, and at the same time see how the Gachn Group-90-FMS800 dual-host plastic laminating machine, this "industry expert", stands out with its hard-core technology.

1. Raw material preparation and melt plasticization: the transformation from granules to melts

（1） Raw material input

Conventional plastic weaving laminating is mainly PE granules, and functional masterbatches such as antioxidants and masterbatches can be added according to needs, and enter the extruder through the hopper. When laminating BOPP film, in addition to base materials such as PE, raw materials with better compatibility with BOPP film are often selected to ensure a more stable composite effect. The GC90-FMS800 laminating unit is equipped with an automatic feeder, making the input of raw materials more convenient and efficient.

（2） Heating and melting

The heating device outside the extruder barrel (such as a resistance heating ring) cooperates with the internal rotating screw to "double-treat" the raw materials: heating the raw materials to a molten state (PE melting point 105-135℃, PP 160-170℃), and the screw shearing makes the melt mixed more evenly. The Gachn Group-90-FMS800 dual-host plastic laminating machine uses a Toudao refined screw with a diameter of 90mm. It is also equipped with a fast column screen changing machine, which can stabilize the extrusion volume. The maximum extrusion volume of a single machine can reach 200kg/h. The barrel screw material is 38CrMoAlA, which is sturdy and durable, ensuring the stable melting and plasticization of the raw materials. For BOPP film laminating, due to the high melting point of BOPP (165-175℃), the ceramic heaters (30kw each) and Omron automatic temperature control instruments (eight) of the unit can accurately control the temperature, ensuring that the raw materials are fully melted and avoiding high temperature damage to the BOPP film.

2. Melt extrusion film forming: the birth of uniform film

(1)Melt filtration and voltage stabilization

The melted melt is first filtered through the filter to remove impurities, and then enters the voltage stabilizing device. This step is particularly critical for BOPP film laminating - the surface of the BOPP film is flat. If the melt pressure is unstable, it is very easy to cause defects such as bubbles and uneven thickness after compounding. The relevant devices of the Gachn Group-90-FMS800 dual-host plastic laminating machine can effectively ensure the stability of the melt pressure and lay a good foundation for subsequent film forming.

(2)T-die extrusion

The melt is finally extruded through the "T-die". The die flow channel is designed in a gradual change, which can evenly distribute the melt to the entire width to form a molten film that matches the width of the substrate. BOPP film laminating requires higher die precision to ensure that the film can perfectly cover the surface of the BOPP film. Gachn Group-90-FMS800 dual-host plastic laminating machine adopts a T-type die with a width of 1050mm. The die block is adjustable from 200 to 1050mm, which is achieved by adjusting the plug-in plate with a hand wheel. The die material is 5 chromium nickel molybdenum, equipped with ten Omron automatic temperature control instruments and ten Taiwan-made thermocouples to ensure stable discharge, allowing the plastic melt to flow evenly in the die, avoiding dead corners and speed fluctuations.

3. Substrate pretreatment: Make the bond stronger

In order to enhance the adhesion between the laminating layer and the substrate, the pretreatment link is essential, and BOPP film is particularly dependent on this:

·Corona treatment: Oxidize the surface molecules of the BOPP film through high-voltage discharge, increase the surface tension, solve its "non-stick" problem, and effectively prevent delamination.

·Preheating: The preheating temperature of BOPP film needs to be strictly controlled at 40-60℃, which can not only reduce the temperature difference with the melt, but also avoid deformation caused by high temperature; the preheating temperature of conventional woven fabrics is slightly higher (50-80℃). The laminating machine of the GC90-FMS800 unit is equipped with a preheating roller with a diameter of 350MM, which can accurately control the preheating temperature and improve the bonding effect between the substrate and the melt.

4. Composite lamination: "Intimate bonding" of substrate and film

(1)Synchronous lamination

The pretreated substrate (woven fabric or BOPP film) is transported to the bottom of the die head by the guide roller and accurately aligned with the extruded molten film. BOPP film is thin and has good stiffness. It has extremely high requirements for the synchronization of the travel speed and the melt extrusion speed. It needs to be guaranteed by a precise control system to avoid wrinkles or uneven stretching. The control system of the Gachn Group-90-FMS800 dual-host plastic laminating machine adopts PLC and touch screen, which can complete the synchronous operation of the whole machine. Its laminating line speed can reach 250m/min, and the unwinding is equipped with EPC automatic deviation correction, with a stroke of ±100mm, ensuring the precise lamination of the substrate and the film.

(2)Roller lamination

The substrate and the melt enter the roller group (steel roller + rubber roller) and fit tightly under pressure: the laminating pressure of BOPP film is about 0.2-0.6MPa, and that of conventional woven fabric is about 0.3-0.8MPa. The steel roller passes cold water to quickly cool the melt and solidify it into shape; the rubber roller plays a buffering role to ensure uniform lamination. The hardness of the rubber roller for BOPP film needs to be more carefully selected. The Gachn Group-90-FMS800 dual-host plastic laminating machine has two sets of laminating machines, including a 700MM diameter matte large cold roller (manufactured by a professional roller factory, spiral cooling) and a 250mm diameter silicone roller, as well as two QGB 125×80 pressing cylinders, which can provide stable pressure to make the lamination tighter.

5. Cooling, shaping and winding: the final "shaping" of the finished product

(1)Cooling and curing

The composite product is further cooled by multiple sets of cooling rollers (circulating cooling water) to completely cure the laminating layer. The thermal stability of BOPP film is poor, and rapid cooling can reduce the heating time and ensure dimensional stability. The laminating thickness is usually 0.01-0.1mm, which can be adjusted by the die opening, extrusion speed, etc. The BOPP film laminating has stricter control over thickness uniformity. The total water supply of the GACHN GROUP-90-FMS800 dual-host plastic laminating machine is 0.5m³/min, which can provide sufficient water for the cooling system. The laminating thickness can be adjusted between 0.008-0.03mm to meet different needs.

(2) Traction and winding

The cooled finished product is transported to the winder by the traction roller (the speed is slightly higher than the pressure roller, forming a slight tension to ensure flatness). When winding the BOPP film, the tension must be precisely controlled to avoid stretching and deformation, and finally rolled into a neat coil to complete the entire laminating process. The winder of the GACHN GROUP-90-FMS800 dual-host plastic laminating machine is a double-station large roller friction winding frame, which can realize automatic roll change without stopping the machine. The maximum diameter of the winding is 1500mm, and the winding shaft is 8 inches. It is also equipped with an automatic tension roller device and a 5.5kw variable frequency dedicated motor and Huichuan inverter, which can accurately control the winding tension to ensure that the coils are neat and tight after winding.

Six. Unique advantages of GACHN GROUP-90-FMS800 dual-host plastic laminating machine machine.

In addition to the above-mentioned outstanding performance in each link, the unit has many highlights: the use of wall panels and aluminum alloy guide rollers is durable and ensures smooth operation; equipped with automatic trimming devices, including two sets of Aibo trimming related equipment, edge material blowing fan and edge material automatic recovery system, which can improve the utilization rate of raw materials; total power reaches 100kw, air flow rate 0.6m³/min, power and air source are sufficient; the overall dimensions are (14.5 length × 7.5 width × 3.5 height) m, and the structural layout is reasonable.

I hope that through this analysis, you will have a clearer understanding of the working principle of the laminating machine and the advantages of the GACHN GROUP-90-FMS800 dual-host plastic laminating machine. If you want to know more equipment details or process skills, please leave a message in the comment area!

Single yarn strength tester is an important testing equipment in the textile industry, mainly used to measure the mechanical properties of a single yarn. This precision instrument plays a key role in textile production quality control, product development and material research. The following are the main uses of single yarn strength tester:

1. Yarn strength test

(1) Determine the breaking strength (maximum tensile force) of the yarn.

(2) Measure the elongation at break of the yarn.

(3) Evaluate the breaking work (energy required to break) of the yarn.

2. Quality control

(1) Monitor the quality stability during the yarn production process.

(2) Detect the performance consistency of different batches of yarn.

(3) Provide objective data basis for product classification.

3. Process optimization

(1) Evaluate the impact of different spinning processes on yarn strength.

(2) Compare the impact of different raw material ratios on the performance of the final product.

(3) Optimize spinning parameters to improve yarn strength.

4. R&D application

(1) Performance evaluation of new fiber materials.

(2) R&D testing of special yarns (such as high-strength and high-modulus yarns).

Durability testing of functional yarns.

5. Standard Compliance Testing

(1) Conduct standardized testing in accordance with international standards (such as ISO, ASTM).

(2) Provide mechanical property data required for product certification.

(3) Meet special testing requirements specified by customers.

The test results of single yarn strength testers are of great significance for predicting the performance of yarn in subsequent processes (such as weaving and knitting) and the durability of the final textile products. Modern single yarn strength testers are usually equipped with computer control systems that can automatically record test data and generate detailed analysis reports, greatly improving test efficiency and result reliability.

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I. Equipment introduction

The automatic fabric vertical tester is a precision instrument used to measure the dimensional stability, tensile properties or drape characteristics of fabrics in a vertical state. Through the automatic control system, the equipment can accurately measure the deformation, elongation and other parameters of the fabric in a vertical hanging state, and is widely used in the fields of textile quality inspection, research and development, and production control.

II. Equipment composition

1. Main frame (including vertical guide rails).

2. Automatic clamping device (upper and lower clamps).

3. Force sensor system.

4. Displacement measuring device.

5. Control panel and display.

6. Data processing system.

7. Safety protection device.

III. Preparation before testing

1. Equipment inspection

(1) Confirm that the equipment is placed horizontally and the base is stable.

(2) Check that the power connection is normal (220V±10%, 50Hz).

(3) Confirm that all moving parts are well lubricated and there is no jamming.

(4) Check that the fixture is not damaged and the clamping surface is clean.

2. Sample preparation

(1) Cut the specimen according to the standard requirements (usually 300mm×50mm).

(2) The edges of the specimen should be flat and free of burrs.

(3) The number of specimens per group should be no less than 5.

(4) The specimen should be humidified under standard atmospheric conditions for at least 24 hours.

3. Parameter setting

Enter the test parameters through the control panel:

(1) Specimen length.

(2) Pre-tension (usually 5N).

(3) Test speed (standard is 100mm/min).

(4) Number of tests.

(5) Holding time (if necessary).

IV. Test operation steps

1. Power on and preheat:

Turn on the power, start the equipment, and preheat for 15 minutes

2. Fixture adjustment:

(1) Press the "fixture reset" button to return the upper and lower fixtures to the initial position.

(2) Adjust the fixture spacing to the standard distance (usually 200mm).

3. Install the sample:

(1) Place one end of the sample vertically into the upper fixture to ensure that there is no skew.

(2) Press the "upper clamp" button to fix the upper end of the sample.

(3) After applying pre-tension to the lower end of the sample, press the "lower clamp" button to fix it.

4. Start the test:

(1) Confirm that the safety protection device is closed.

(2) Press the "start test" button and the equipment will run automatically.

(3) Observe the sample status to ensure that there is no abnormality during the test process.

5. End of test:

(1) The equipment automatically stops and returns to the initial position.

(2) Record test data or print test report.

(3) Remove the tested sample.

6. Repeat test:

Replace new sample and repeat the above steps to complete the specified number of tests.

V. Data processing

1. The equipment automatically calculates and displays:

(1) Average elongation (%).

(2) Maximum force (N).

(3) Deformation recovery rate (%).

(4) Coefficient of variation (CV%).

2. Data export:

(1) Export test data through USB interface.

(2) Connect to computer and use special software for data analysis.

VI. Precautions

1. Safe operation:

(1) It is strictly forbidden to open the protective door during the test.

(2) Keep a safe distance when the equipment is running.

(3) Press the emergency stop button immediately in an emergency.

2. Maintenance:

(1) Clean the fixture and workbench after daily testing.

(2) Check the sensor accuracy regularly (recommended once every 3 months).

(3) Fill the guide rail with special lubricating oil every month.

3. Other precautions:

(1) Avoid using in a strong electromagnetic interference environment.

(2) When testing different fabrics, it is necessary to adjust the appropriate clamping force.

(3) Overloading will damage the force sensor.

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Yarn length measurement is an important part of quality control in the textile industry, used to measure parameters such as the length, linear density and twist of yarns. The following is the standard usage method of the yarn length measuring instrument:

I. Preparatory Work

1. Instrument inspection

(1) Confirm that the length measuring instrument is placed horizontally and all its components are intact.

(2) Check whether the counter, tensioning device and yarn guiding device are working properly.

(3) Clean the surface of the instrument and the yarn guiding components.

2. Environmental conditions

(1) Standard test environment: Temperature 20±2℃, relative humidity 65±3%.

(2) Avoid direct sunlight and strong air currents.

3. Sample preparation

(1) Take about 1.5 meters of yarn from the yarn barrel as the guide yarn.

(2) Remove the yarn segments with damaged or contaminated surfaces.

Ii. Operating Steps

1. Install the yarn

(1) Draw the yarn out from the bobbin and pass it through the tensioning device.

(2) Ensure that the yarn passes through all yarn guides without any cross-entanglement.

(3) Fix the end of the yarn on the winding shaft.

2. Parameter Settings

(1) Set the appropriate tension according to the type of yarn (usually 0.5cN/tex for cotton yarn and 0.25cN/tex for wool yarn).

(2) Set the winding length (the standard is 100 meters, and for short segment tests, it can be 10 meters or 20 meters).

(3) Set the number of pre-turns (usually 3 to 5 turns).

3. Start measuring

(1) Start the instrument, and the yarn begins to be wound evenly.

(2) Observe the winding process to ensure that the yarns are neatly arranged without overlap.

(3) The instrument will automatically stop when the set length is reached.

4. Data recording

(1) Record the actual length displayed by the counter.

(2) If the linear density is measured by the weighing method, remove the yarn frame for weighing (accurate to 0.01g).

(3) Calculate the actual linear density: Tex= weight (g)×1000/ length (m).

Iii. Precautions

1. Safe operation

Do not touch the moving parts when the instrument is in operation.

(2) Press the emergency stop button immediately in an emergency.

2. Measurement accuracy control

At least three samples should be tested for each batch of yarn and the average value should be taken.

(2) The tension fluctuation should be controlled within ±0.1cN.

(3) The winding speed should not be too fast (30-60m/min is recommended).

3. Maintenance and care

Clean the instrument after daily use.

(2) Regularly check the accuracy of the tension device.

(3) It should be calibrated by professionals every six months.

Iv. Common Problem Handling

1. Yarn breakage

(1) Check if the tension is too high.

(2) Check if there are burrs on the yarn guide.

(3) Confirm whether the strength of the yarn itself meets the standard.

2. Inaccurate counting

(1) Check whether the sensor is clean.

(2) Confirm whether the preset length unit is correct.

(3) Check whether the circuit connection is good.

3. Uneven winding

(1) Adjust the stroke of the yarn guide.

(2) Check whether the tension of the yarn is stable.

(3) Confirm whether the winding shaft is deformed.

The correct use of the yarn length measuring instrument can obtain accurate yarn length data, providing a reliable basis for subsequent quality control and process adjustment. Data should be recorded and archived in a timely manner after each test to facilitate quality tracking and analysis.

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