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01

2023-03

What are the safety issues that need to be paid attention to when operating the grinding machine?

1. The operator shall wear waterproof insulated work shoes. 2. Please connect the mechanical power supply to the distribution box before use to ensure that there is leakage protection and overload protection in the distribution box. 3. Check whether the power cord is damaged or aged, and replace it in time if any. 4. The power line should conform to the national standard, and the line length should not exceed 100 meters.

2023-03-01

01

2023-03

Working principle of milling machine

Pavement milling machine is one of the main types of asphalt pavement maintenance and construction machinery. One of the main equipment for asphalt concrete pavement maintenance and construction is mainly used for the excavation and renovation of asphalt concrete surface layers such as highways, urban roads, airports, freight yards, etc. It can also be used to remove defects such as pavement embossment, oil waves, mesh patterns, rutting, etc. It can also be used to excavate potholes and grooves on the pavement, and milling of cement pavement. Milling the damaged old pavement with a road milling machine, and then laying a new surface layer is one of the most economical modern maintenance methods. Because of its high efficiency, simple construction process, easy control of milling depth, convenient and flexible operation, good mobility, milling of old materials can be directly recycled, etc., it is widely used in urban municipal roads and highway maintenance projects. Main structure and working principle The general milling machine is composed of engine, frame, milling rotor, milling depth adjustment device, hydraulic components, aggregate conveying device, steering system and braking system. The milling rotor is the main working part of the milling machine. It is composed of the milling rotor shaft, the cutter seat and the cutter head. It directly contacts with the road and achieves the purpose of milling through its high-speed rotating milling cutter. The milling machine is equipped with an automatic leveling device, which uses the side cover of the milling rotor as the milling reference surface and controls two positioning hydraulic cylinders to keep the given milling depth constant; Its hydraulic system is used to drive the milling rotor to rotate, the whole machine to walk, auxiliary device work, etc. It is generally a closed hydraulic system with multiple pumps independent of each other, which does not interfere with each other and has high reliability when working. Some milling machines are equipped with inclination adjusters as required to control the inclination of the rotor. Generally, large milling machines have an aggregate conveying device composed of a conveyor belt and a collector, which can concentrate and transfer the milled bulk material to a random walking vehicle. The height of the conveying arm can be adjusted and can swing left and right to adjust the unloading position. When the specifications and models of the milling machine are different, their structure and layout are slightly different, but the basic working principle is the same or similar. The route of power transmission of milling machine: engine → hydraulic pump → hydraulic motor, hydraulic cylinder → working device.

2023-03-01

Metech Multifunctional Fault Condition Analysis O2 Code

28

2023-02

Metech Multifunctional Fault Condition Analysis O2 Code

Here are the issues that may arise with this type of malfunction: 1. The ground is extremely uneven, resulting in significant resistance from the grinding disc and placing excessive load on the motor. 2. If this occurs during the initial use of a new machine, it could mean the speed regulator has already been set to its maximum rotation speed, or the new grinding discs (or blocks) may not have been properly broken in yet—specifically, they might still be pressed too firmly against a rough, hard surface, leading to high resistance on the grinding disc and straining the motor. 3. Alternatively, if the issue arises after servicing the gearbox and the machine is tested for the first time, it might indicate that the gears were not assembled smoothly or are too tightly fitted, causing the grinding disc to rotate manually with difficulty. Another possibility is that, during assembly, the motor was fixed in place before ensuring proper alignment between the motor shaft and the central gear—resulting in misalignment and hindering the smooth rotation of the motor rotor, ultimately causing the machine to jam or stutter. Suggested solutions: 1. Lift the machine slightly and move it to a more level area for grinding, then gradually resume working on the uneven sections. Alternatively, you can use another smaller grinding device to lightly smooth out the rough, pitted areas of the ground before proceeding with your main machine. 2. Break in the grinding discs (or blocks) by pressing down firmly on the handlebars while keeping the machine slightly elevated off the ground. Then, slowly lower the machine back onto the surface, allowing the grinding disc to make contact with the ground. 3. Reassemble the gears or reattach the motor to ensure smooth operation of the grinding disc and gears. After aligning the motor shaft concentrically with the central gear, securely suspend the motor and gearbox unit, power on the motor, and check for smooth rotation. Once the system is running smoothly, manually test the grinding disc to confirm effortless movement.

2023-02-28

Things to keep in mind when using the Metengqi 12T-630 floor grinder

28

2023-02

Things to keep in mind when using the Metengqi 12T-630 floor grinder

The 12T-630 is Metengqi's newly launched floor grinding machine, which has been warmly received by everyone. Below, let’s take a closer look at the key points to keep in mind during operation: --- **1. Gearbox Maintenance:** After the gearbox is used for the first time for 1,000 hours, the gear oil must be replaced immediately. Thereafter, gear oil should be changed annually. **Symptom:** Internal damage within the gearbox often occurs during the initial break-in period, resulting in metal shavings. **2. Handling Precautions:** When replacing grinding discs or moving the gearbox, handle it with care and avoid rough handling. **3. Post-Operation Cleaning:** Always clean the gearbox thoroughly after each use—simply rinsing with clean water is sufficient. This helps extend the lifespan of both the floor grinding machine and its oil seals. **4. Regular Oil Level Checks:** Frequently inspect the gearbox oil level to ensure it remains at the proper height. If the oil level is low, top it up promptly. Use the dipstick for accurate measurement. **5. Water Entry Prevention:** Be cautious when adding water—make sure no water enters the frequency converter or motor during this process. **6. Voltage Compliance:** Ensure that the correct voltage is supplied to the machine before starting operations. **7. Immediate Action Required:** If you notice any unusual noises coming from the gearbox, stop using it immediately to investigate the cause. Continuing to operate under such conditions could lead to further damage, including to smaller gear components. For more detailed information about floor grinding machines, feel free to call Guangzhou Qingqinyu Environmental Technology Co., Ltd. We’re here to assist you with sincerity! [Visit our website](http://www.qingqinyu.com)

2023-02-28

Meitengqi Multifunctional Fault Analysis O2 Code

23

2023-02

Meitengqi Multifunctional Fault Analysis O2 Code

Here are the issues that may cause this type of malfunction: 1. The ground is extremely uneven, resulting in high resistance on the grinding disc and placing excessive load on the motor. 2. If this occurs with a brand-new machine during its first use, it could mean the speed regulator has already been set to its maximum RPM setting. Alternatively, the new grinding discs or plates might not have undergone initial roughing—specifically, they haven’t yet been pressed firmly against a rough, hard surface—leading to significant resistance on the grinding disc and overloading the motor. 3. If the issue arises after servicing the gearbox and the machine is tested for the first time, it might indicate that the gears were improperly assembled, perhaps too tightly fitted. This can make it difficult to manually rotate the grinding disc smoothly. Another possibility is that, during assembly, the motor was fixed in place before aligning the motor shaft concentrically with the central gear. Misalignment like this causes the rotor to spin unevenly, leading to jerky motion and stalling. Suggested solutions: 1. Lift the machine slightly and move it to a smoother section of the floor for grinding. Gradually ease into areas with severe unevenness. Alternatively, use another small grinding device to lightly smooth out the rough, pitted sections of the ground before proceeding with your machine. 2. Roughen the grinding discs or plates directly on a cement surface by applying downward pressure while holding the handlebars. Then, gently lift the machine (slightly off the ground) and start the motor. Slowly lower the machine back onto the ground, allowing the grinding disc to make contact with the surface gradually. 3. Disassemble and reassemble the gears or reinstall the motor properly to ensure smooth rotation of both the gears and the grinding disc. Make sure the motor shaft aligns concentrically with the central gear after insertion. Once everything is securely reassembled, power on the motor and let it run until the gears and grinding disc rotate freely. Afterward, manually check whether the grinding disc turns smoothly without any resistance.

2023-02-23

Metech 12T-630E Multi-Functional Floor Grinder

23

2023-02

Metech 12T-630E Multi-Functional Floor Grinder

Metengqi 12T-630E is designed for grinding and renovating marble, granite, and concrete flooring, among other applications. Product Features: 1. Innovative and aesthetically pleasing exterior design, offering a sleek and sophisticated look. 2. Foldable handle with an integrated central control panel, ensuring convenient, safe, and ergonomically optimized operation, while allowing easy movement of the handle. 3. High-power (7.5 kW HP) inverter motor, perfectly suited for the demanding, long-term, high-frequency use required in industrial floor grinding tasks. 4. Automatic pressure regulation system, tailored to meet the diverse needs of various construction processes. 5. Optional dust collection equipment available, enabling both dry and wet working modes. 6. Rotary-type water release switch paired with a central water outlet system on the grinding disc, effectively minimizing secondary wear of grinding materials and preventing grinding marks during operation—significantly boosting overall work efficiency. 7. Versatile grinding discs compatible with a wide range of abrasive materials, helping you minimize your project costs as much as possible.

2023-02-23

22

2023-02

Meidengqi laser leveling machine use example

LS-300 laser concrete leveling machine is one of the products of Guangzhou Qing Qinyu Environmental Protection Technology Co., Ltd. It is mainly used for ground and road construction leveling. This machine adopts advanced laser measurement and control technology, computer control technology, sensor technology, servo drive technology, etc. High-end technology has the advantages of high degree of automation, simple operation, few construction personnel, low cost, high efficiency, and good quality.

2023-02-22

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