The cleaning four steps of laser leveling machine

Concrete laser leveling summer maintenance 1.The hot weather construction to prevent engine overheating, in general, the temperature of the engine not more than 95 °, if the temperature is too high, you should select a shaded area to cool down, down at the same time can have the fuselage cover ventilation cooling. 2.Before entering the summer, should thoroughly remove the combustion chamber, valve top and the carbon of  other parts  in order to maintain good heat dissipation and normal compression ratio, in case of engine deflagration. 3.Often clean the hydraulic oil radiator, in order to prevent poor heat dissipation. 4.In the summer construction, high temperature, need to check the tire pressure and tire temperature, if the tire temperature is too high should be promptly shut down and placed in a cool place to cool down, disable the wrong way to vent or pour cold water to cool down. 5.The electrical system should pay attention to waterproof, do not open the box cover, do not use water to wash the electrical protection box, do not use corrosive liquid cleaning machine! 6.Check the temperature of hydraulic oil and hydraulic transmission oil.The temperature is too high to rest, not more than high temperature operation. 7.To pay attention to the daily maintenance of concrete machinery and equipment.The operator should regularly carry out comprehensive maintenance of the machinery, due to the rise of temperature, summer construction must be timely replacement of the engine air filter, oil filter and oil, and check the performance of the fan, water tank, generator is reliable, necessary maintenance, maintenance or replacement;At the same time, the concrete solidification speed is fast in summer, so the concrete impurities of the fuselage should be cleaned in time to ensure the cleanliness of the fuselage.

    Lubrication and maintenance of the power trowel is the core work to ensure the long-term stable operation of the equipment and prevent sudden failures. The key lies in "using the right oil, finding the right time, doing it on time and using the right method". The following are the specific key points 1. Power trowel the main shaft bearing – the most crucial and frequent Location: The center drive shaft of the pan, usually with 1-2 grease nozzles. Lubricant: High-temperature resistant (≥120℃), extreme pressure lithium-based grease (such as molybdenum disulfide grease) must be used. Ordinary butter must not be used. Method and Cycle It must be carried out after each shift's work (working for 8 to 10 hours). Thoroughly clean the grease nipple and its surroundings. Add until the new grease overflows: Use a grease gun to add until the clean new grease is completely squeezed out from the edge of the bearing seal ring from the old grease. Wipe off the excess grease. Objective: To remove metal shavings and impurities produced by internal wear and ensure that the bearing cavity is filled with new grease. 2. Gearbox/reducer Lubricant: Select the specified type of gear oil (such as SAE 80W-90 GL-4) strictly in accordance with the instructions. Check: Every day, check through the oil window or dipstick whether the oil level is between the upper and lower marks. Replacement cycle First replacement: After the new machine has been running for 20 to 30 hours, remove the running-in debris. Regular replacement: Replace it every 300 to 500 hours of operation or annually thereafter. Key point: Oil change should be carried out when the oil temperature is still hot after the equipment is shut down to ensure that the old oil is completely drained. 3. Traveling wheels and steering mechanism Location: Walking wheel bearing, steering tie rod ball joint, hinge point. Lubricant: The high-temperature resistant lithium-based grease as mentioned above. Cycle: Every 50 hours of operation or once a week. Method: Clean each grease nozzle and add grease until new grease overflows from the gaps. 4. Engine (Gasoline model) Engine oil inspection and replacement Check the oil dipstick before starting every day to ensure the oil level is normal. First replacement: After running for 20 to 30 hours. Regular replacement: Every 100 hours or every quarter. The cycle should be shortened in harsh environments. Air filter maintenance: Regular cleaning. For oil bath air filters, use the dedicated air filter oil as per the instructions. Cleaning first: Before filling, be sure to clean the oil nozzle, oil cap and the surrounding area to prevent sand, dust and concrete particles from being brought into the interior. Strict specifications: Different parts should use the specified type of grease/oil products. They must not be mixed or substituted. High-temperature grease is the "life-saving oil" for the main shaft bearings. Squeezing out the old grease: For bearing lubrication, "adding until the new grease overflows" is a necessary step. This is the only effective way to remove contaminants and ensure the lubrication effect. Precise cycle: The maintenance cycle is mainly based on the operating hours (rather than calendar time) and is strictly recorded. Error: Lubricate the main shaft bearings with ordinary grease. Consequence: The grease melts and leaks away at high temperatures, the bearings dry grind rapidly and burn out at high temperatures, leading to the failure of the entire machine. Error: Only add fat without squeezing out the old fat. Consequence: Metal shavings accumulate in the bearing cavity, forming abrasives, accelerating wear, and causing abnormal noises and jamming. Error: Ignoring the oil level in the gearbox and its replacement. Consequence: Insufficient lubrication of gears and bearings leads to pitting corrosion, broken teeth, and scrapping of the reducer. Error: The spilled grease was not cleaned up after lubrication. Consequence: Grease adsorbs dust to form hard scale, which damages the sealing performance of the oil seal and makes it easier for impurities to invade. Create a lubrication chart: Make a simple chart of all lubrication points, oil types and cycles of the equipment, and stick it in a prominent place on the equipment. Equipped with dedicated tools: Use high-quality grease guns and dedicated oiling nozzles to ensure sufficient filling pressure. Record: After each maintenance, record the operating hours and maintenance items to form a traceable maintenance file. Long-term storage and maintenance: Before the equipment is out of use, thoroughly lubricate all lubrication points once. The engine oil should be changed or stabilizers added as per regulations to prevent internal rusting. The lubrication and maintenance of a power trowel essentially involve the continuous confrontation with its harsh working environment (heavy load, high temperature, and much dust). By grasping the two key points of "post-shift high-temperature grease extrusion lubrication" for the main shaft bearings and "regular oil change" for the gearboxes, the vast majority of major mechanical failures can be avoided, significantly extending the service life of the equipment.   Note: The parameters provided in this document are for reference only and are not mandatory. Due to differences in technical characteristics between different brands and models of laser levelers, please consult the manufacturer for a suitable solution before actual operation. This reference document assumes no responsibility for any issues arising from failure to follow the manufacturer's instructions.    

    Concrete laser leveling machines are powerful tools for achieving high-precision floors, but if not operated properly, they can also directly cause or exacerbate various surface defects. The following will conduct a detailed analysis of the causes of three common defects: color difference, scratches, and peeling, and will focus on elaborating their correlation with the operation of laser leveling machines. The laser leveling machine itself is a neutral tool, but parameters such as its operation timing, traveling speed, knife plate Angle, and vibration frequency will directly affect the bleeding, slurry distribution, and density of the concrete surface, thus becoming the "cause" or "inducement" of surface defects. Defect description: After the floor was completed, there were uneven colors, with some areas being darker and others lighter. The essence of color difference lies in the uneven composition of the surface slurry and the distribution of moisture. Specifically, it is manifested as Uneven water-cement ratio: Excessive or insufficient moisture in some areas. Bleeding phenomenon: Water is overly vibrated or squeezed onto the surface. After evaporation, it leaves cement slurry, which is bluish and dark in color. Slurry deficiency: Insufficient surface mortar, exposed aggregates, light and grayish color. Operational issues The mechanism causing color difference Intensity of correlation 1. The timing of the leveling was inappropriate • Premature leveling: When the concrete is still bleeding in large quantities, the knife plate of the leveling machine will stir and mix the water and slurry, disrupting the natural bleeding process and causing local water spots. Extremely high • Late leveling: The concrete has already begun to set, and the trowel cannot bring sufficient slurry to the surface, resulting in slurry loss, exposed aggregates, and the formation of light-colored patches. 2. Uneven walking speed • Excessive speed: The knife plate fails to bring sufficient mortar to the surface in time, resulting in uneven coverage of the mortar. High • Speed fluctuates: In the slow zone, the equipment will rub the concrete excessively, causing concentrated bleeding and darkening of the color. In the rapid area, the slurry is insufficient and the color becomes lighter. 3. Improper vibration frequency • Excessive vibration frequency: Especially when the slump of concrete is large, excessive vibration will intensify bleeding, causing a large amount of water and fine particles to float up, forming dark water marks or slurry spots. High 4. The Angle and height of the knife plate were set incorrectly • Too flat Angle (too small attack Angle) : The blade mainly serves to level rather than lift the slurry, which may result in insufficient surface slurry. Medium • Too steep Angle: Excessive compression of concrete can also promote bleeding. • The height setting is too low: The knife plate overly compresses the concrete surface, forcing the slurry and water to float up. Summary: Improper operation of the laser leveling machine is one of the direct causes of color difference. By controlling the "waiting time" (allowing the concrete to have a stable bleeding process), maintaining a uniform speed, and adjusting the vibration frequency according to the state of the concrete, color differences can be greatly avoided. Defect description: Obvious knife plate scratches or "serpentine" trajectories appear on the surface. The direct cause of the scratches is that the knife plate of the leveling machine left marks on the initially formed surface, and these marks cannot heal by themselves before the concrete solidifies. Operational issues The mechanism that causes scratches Intensity of correlation 1. The knife plate is not clean The initially set concrete blocks bonded on the knife plate will create deep grooves on the new surface. This is the most common reason. Extremely high 2. The timing for leveling was too late The concrete has entered the initial setting period and lost its fluidity. At this moment, the blade was not leveling but plowing the land, and the marks left could not be smoothed and healed. Extremely high 3. Walking too fast The blade quickly cuts across the surface, and the concrete has no time to level and merge behind the blade, forming waves and marks. High 4. The equipment jolts up and down The base layer is uneven or the equipment's tracks/tires are moving on the soft concrete, causing the leveling head to rise and fall accordingly. The knife plate cuts into the surface too deeply, forming periodic dents. High The laser signal receiver is subject to vibration and constantly corrects the height of the machine head, which can also cause slight jolts. 5. The material or type of the knife plate is inappropriate For fast-setting concrete, using hard plastic knife plates can reduce scratches more effectively than using metal knife plates. Medium Summary: Scratches are almost 100% related to the operation of the leveling. Keeping the knife board clean, mastering the correct construction window period, and maintaining a uniform and stable operation on a flat base layer are the keys to eliminating scratches. Defect description: A layer of slurry or mortar on the surface separates from the lower layer of concrete, with extremely low strength. It can be easily scraped off by hand or with a hard object. The mechanism of peeling is that a weak layer with an excessively high water-cement ratio and low strength is formed on the surface, which fails to combine well with the main structure. This weak layer mainly comes from: Excessive bleeding: A large amount of water rises to the surface, forming a layer of cement slurry with an extremely high water-cement ratio. Secondary surface finishing damage: When there is bleeding on the surface, troweling is carried out to press the cement slurry back to the surface layer. Surface loss of mortar: The operation of the leveling machine "takes away" or "destroys" the valuable mortar on the surface. Operational issues The mechanism causing peeling Intensity of correlation 1. Excessive vibration frequency/premature timing Excessive vibration during the bleeding period of concrete is the primary cause of excessive bleeding. A large amount of water and fine particles are forcibly discharged to the surface, forming a weak layer. This layer of slurry has a large shrinkage and low strength, and is very prone to peeling. Extremely high 2. The height of the knife plate is set too low The knife plate penetrates deep into the concrete like a "plough", not only squeezing and bleeding water, but also destroying the already compacted aggregate structure, causing segregation between the slurry and the aggregates, and forming a rich slurry layer without aggregates on the surface, which is prone to peeling. High 3. Too many leveling operations Repeatedly leveling the same area back and forth is equivalent to repeatedly disturbing and rubbing the surface, which aggravates bleeding and damage to the surface structure. Medium 4. Indirect impact: Creating adverse conditions Improper operation of the leveling machine can cause severe bleeding or color difference. When workers operate on it later, improper finishing timing (working when there is standing water) will increase the risk of peeling. Indirect Summary: The laser leveling machine is the key cause of peeling. Excessive vibration and improper pressure on the knife plate are the main culprits for the formation of a weak surface layer. Controlling vibration and avoiding excessive leveling are at the core. Defect Key control points of the laser leveling machine Supporting management measures Color difference Seize the opportunity: Wait until the bleeding stabilizes before starting to level it. Ensure the stability of the concrete mix ratio and the consistency of the slump. 2. Walk at a constant speed: Maintain a stable and appropriate speed. Ensure uniform unloading and avoid uneven local dryness and wetness. 3. Adjust the vibration properly: Dynamically adjust the frequency according to the slump of the concrete. Scratch 1. Keep clean: Clean the adhesive material on the knife plate at all times. • Ensure proper equipment maintenance to guarantee the stability of the hydraulic and control systems. 2. Seize the time: Complete all leveling work before the initial setting. Train the operators to be familiar with the setting characteristics of concrete. 3. Smooth operation: Ensure the base is flat and the equipment moves smoothly. Peeling 1. Avoid over-vibration: It's better to have less than more, especially during the bleeding period. Optimize the concrete mix proportion to reduce bleeding. 2. Set the height: The height of the knife plate should be set just to level it. Do not press it down. The education light collection team must carry out the light collection when there is no bleeding. 3. Reduce the frequency: Plan the path well to avoid repetitive work. Conclusion: The operator of a laser leveling machine is not only the equipment driver but also the "sculptor" of the concrete surface. He must have a profound understanding of the rheological properties of concrete (bleeding and setting), and through precise control of the parameters of the equipment in his hand, guide the concrete to form a uniform, dense and smooth surface. Any mechanized operation that is detached from the state of the concrete (" acting on the material ") is highly likely to cause surface defects.   Note: The parameters provided in this document are for reference only and are not mandatory. Due to differences in technical characteristics between different brands and models of laser levelers, please consult the manufacturer for a suitable solution before actual operation. This reference document assumes no responsibility for any issues arising from failure to follow the manufacturer's instructions.