The one-step forming construction technique for high-precision, wear-resistant floors without cutting joints, which is based on laser leveling technology

    The hydraulic system of the concrete laser leveling is its "heart" and "muscle", responsible for driving all key actions such as the lifting, vibration, movement of the leveling head and the extension and retraction of the boom. A scientific and rigorous maintenance plan for the hydraulic system is the core to ensuring the reliability, accuracy and long service life of the equipment. The following is a well-structured and highly operational correct maintenance plan for the hydraulic system of a concrete laser leveling: More than 70% of the faults in the hydraulic system are caused by oil contamination (particles, water, air) and excessively high oil temperature. Therefore, the maintenance plan should revolve around "keeping the oil clean and cool". Oil level check: When the equipment is parked on a level ground and all oil cylinders are retracted, check the oil level gauge of the hydraulic oil tank to ensure that the oil level is between the upper and lower limits marked. Low oil level can cause the pump to run dry, the system to overheat and components to be damaged. Visual inspection Leakage inspection: Quickly inspect the oil pump, valve block, cylinder piston rod, all pipe joints and hose surfaces for visible oil leakage or dripping. Pipeline inspection: Check for any abnormal bulges, wear, cracks or friction with adjacent components in the hydraulic hose. Start preheating: In cold weather, after starting the engine, it should be run at medium to low speed without load for 3 to 5 minutes to allow the hydraulic oil to circulate and heat up, improve fluidity, and prevent dry grinding of components. Cleaning and inspection: After the operation, check whether the oil filling port of the hydraulic oil tank, the vent valve (breather), and the surface of the hydraulic components are contaminated by cement mortar. Clean them in time to prevent contaminants from entering the system. Temperature perception: Before shutting down, use the back of your hand to sense whether the temperature of the fuel tank and the main valve blocks is abnormally hot to the touch (usually not exceeding 80℃). Continuous high temperatures will accelerate the oxidation and deterioration of the oil. This is the main body of the maintenance plan. It must be carried out strictly in accordance with the intervals in the manufacturer's manual and detailed records must be made. Maintain the project Period/Frequency Specific operations and standards Hydraulic oil replacement First replacement: 200 to 500 hours after a new machine or major overhaul. 1. Change the oil while it's still hot: Perform this when the equipment has just been shut down and the oil temperature is still hot. Regular replacement: Every 1,000 to 2,000 working hours or once a year (whichever comes first). 2. Thorough empting: Drain the old oil from the fuel tank and oil lines. If necessary, flush with fresh oil. The cycle needs to be shortened under harsh working conditions. 3. Clean the fuel tank: Use a non-fibrous cloth to clean the inner wall of the fuel tank and the magnetic drain plug. 4. Strict oiling: Add new hydraulic oil of the specified grade and viscosity level to the prescribed oil level through a high-precision filter. Replacement of the oil suction/return oil filter element Every 500 hours or simultaneously with each oil change. When replacing, pay attention to cleaning the area around the filter element seat to prevent dirt from falling in. 2. Never reuse the filter element after cleaning it. High-pressure pipeline filter (if any) Alarm according to the clogging indicator on the filter, or as stipulated in the manual (usually synchronized with the oil change cycle). Timely replacement and checking the type of residue on the filter element can help determine the internal wear condition of the system (for example, if there is a lot of metal shavings, there may be abnormal wear of components). Hydraulic oil quality testing Every 6 months to 1 year (applicable to high-value or high-intensity usage equipment). Samples are sent to a professional laboratory for oil spectral analysis to detect water content, contamination degree, acid value and metal wear particles. This is the most effective means of predictive maintenance, which can detect potential faults in advance. System tightening and inspection Monthly or every 250 hours. 1. Inspect and tighten all pipe joints, flanges and valve block installation bolts (in accordance with torque requirements). 2. Check all the piston rods of the oil cylinders for any scratches, rust or bends. Minor scratches should be repaired immediately with an oilstone. 3. Check the pre-charge pressure of the accumulator (if any). Cooling system cleaning Weekly or depending on the cleanliness of the environment. Clean the fins of the hydraulic oil radiator to ensure there is no blockage from dust, willow catkins, cement powder, etc., to guarantee the heat dissipation efficiency. This is the key to controlling the oil temperature. Overloading is strictly prohibited: Avoid the leveling machine operating at its maximum load for a long time, as this will cause excessive system pressure and a sharp increase in oil temperature. Avoid shock: Operate the control handle smoothly to reduce the shock load on the hydraulic system. Cylinder protection: During operation, pay attention to protecting the piston rod to avoid direct impact or scratches from concrete or crushed stones. Proper parking: When parked for a long time, all cylinders (especially the exposed piston rods) should be retracted to reduce corrosion and deformation. High-temperature environment: Enhance the cleaning of the radiator. Consider using hydraulic oil with higher viscosity (as recommended in the manual), and add auxiliary cooling if necessary. High humidity/water environment: Strengthen the inspection of oil level and water content in oil products, and keep the vent valve of the oil tank dry. The replacement cycle of the filter element can be shortened. In extremely cold environments: Use low pour point hydraulic oil. The equipment should be parked in a warm warehouse and fully preheated before startup. Park the equipment in a dry room and completely retract all the oil cylinders. Fill the fuel tank to the brim to reduce the formation of condensation on the inner walls. Start the engine every month and let the hydraulic system run idle for 10 to 15 minutes to lubricate all components and remove moisture. Slow and weak operation: It may be due to low oil level, pump wear, or malfunction of the main relief valve. Abnormal system noise (pump beeping) : It may be due to clogged oil suction filter element, excessively high oil viscosity, pump suction or cavitation. Abnormal increase in oil temperature: cooler blockage, severe internal leakage, improper oil level, and the set value of the relief valve being too high. Cylinder crawling or shaking: Air inside the system, leakage from the cylinder, or oil contamination causing the valve core to get stuck. Stop the machine immediately for inspection: If any of the above abnormalities occur, stop the machine immediately and start checking from the simplest aspects such as oil level, filter element, and leakage. Eliminate operating while faulty: Hydraulic system failures can deteriorate in a chain reaction, and minor issues can quickly turn into major overhauls. Professional maintenance: Complex operations such as pressure adjustment and disassembly of pumps and valves should be carried out by professional maintenance personnel. Before disassembling any hydraulic components, the system pressure must be completely released. Strictly adhere to the cycle: execute by the hour or calendar, and establish maintenance logs. Oil product management is at the core: only specified oil products are used, strictly filtered, and regularly replaced and tested. Cleanliness is the top priority: keep the oil clean, the refueling process clean, and the radiator clean. Pay attention to detailed inspection: Daily visual and tactile checks can detect most early problems. Equal emphasis on operation and maintenance: Standardized operation is the fundamental way to prevent abnormal stress in the hydraulic system. Ultimately, please be sure to take the manufacturer's regulations in your equipment's "User and Maintenance Manual" as the primary basis, and formulate and implement your maintenance plan in combination with your specific working conditions.   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.    

    There are various methods for basement floor construction. Among them, the construction of diamond sand floor and diamond sand floor with curing agent is favored by many real estate projects due to its economic, wear-resistant, pressure-resistant, anti-pollution and easy-to-clean features. However, improper manufacturing processes can also lead to quality issues and potential risks. This article will respectively introduce the diamond sand wear-resistant floor from the perspective of technology and the prevention and control of common problems. 1. Diamond sand floor Compared with ordinary concrete floors, diamond sand floors have better wear resistance, compressive strength and impact resistance, and have a longer service life. However, from the perspective of microstructure, the surface of the diamond sand floor is relatively rough, and the capillary structure of concrete has a low resistance to the penetration, pollution and corrosion of substances such as acids, alkalis and oils. 2. Corundum + cured floor The construction of adding curing agent to the diamond sand floor. When the diamond sand floor is applied with a curing agent, it better makes up for the above deficiencies. Moreover, as the curing agent penetrates and forms a film, it enhances the integrity of the original surface, significantly improving its surface strength and wear resistance. After long-term use, it is obviously superior to the ordinary diamond sand floor in terms of cracking, powdering, and dusting, and is also easier to clean. It has extremely strong wear resistance, pressure resistance and impact resistance The diamond sand floor itself has excellent wear resistance. After adding a curing agent, the strength and hardness of the floor are further enhanced, and its wear resistance, pressure resistance and impact resistance are also significantly improved, and the durability of the floor is greatly enhanced. 2) Prevent sanding and dusting The main advantage of the diamond sand reinforced floor is its ability to prevent sanding and dusting. After the application of the curing agent, the surface hardness (indicated by the diameter of the indentation) and wear resistance (indicated by the length of the grinding pit) can be effectively enhanced. The surface becomes denser and has better integrity, which can effectively prevent sanding and dusting. 3) Waterproof, oil-proof and anti-corrosion The surface of a common diamond sand floor has pores that are hard to see with the naked eye. Water, oil and other corrosive liquids can seep into the interior of the floor through these holes and gaps. The most notable feature of the curing agent is its excellent sealing property, just like coating the floor with a film to prevent erosion. 1. The surface of the floor is firmly combined with the base layer, without any hollowing or sanding phenomena. 2. Surface layer quality: Uniform color, no obvious color difference, no scratches, no slag inclusions. The surface must not have cracks and hollowing is not allowed. 3. Gloss requirements: Achieve medium to high brightness, and the lamp should have a reflective effect when illuminated. 4. Joint: Uniform width, and the inside of the joint should be thoroughly cleaned. 5. The hardness of the floor should reach above 6.5 on the Mohs scale (tested by a hardness tester). 6. The trachoma rate shall not exceed 3 per square meter. 1. The strength of the concrete shall not be lower than C25. 2. The smallest possible water-cement ratio. A water-cement ratio that is too high can cause bleeding on the concrete surface and reduce the compressive strength of the concrete surface. Therefore, the water-cement ratio should be as small as possible, generally controlled below 0.5. 3. Commercial concrete should be used as much as possible. If on-site mixed concrete is used, its slump should be controlled at 1 to 3cm. The slump of commercial concrete is between 12 and 14cm. The diameter of the larger crushed stones shall not exceed 30mm. 4. When the concrete thickness is greater than 8cm, ordinary concrete should be used for pouring; when the concrete thickness is less than 8cm, fine aggregate concrete should be used for pouring. 5. Concrete should be leveled immediately after pouring, with a flatness of no more than 2mm within a 2-meter range. 6. Before the surface layer construction, the base concrete and vibration slurry should be sufficient (not less than 5mm). 7. The mud content of sand and gravel in concrete shall not exceed 2%. 8. After vibration grouting, the bleeding of the concrete should be uniform. If there are water pits, they must be removed and the surface leveled again; otherwise, the flatness of the diamond sand floor construction cannot be guaranteed. 1. Construction of diamond sand floor 1) The ground concrete is poured in sections and leveled immediately after pouring. When multiple locations are being poured simultaneously, pay attention to the construction sequence being carried out in one direction and consider the consistency of the mating surfaces. ② Concrete should be leveled with a long roller or a long straightedge after being pushed flat. Three to five hours after the concrete is poured, it should be observed that there is no bleeding on the surface and it has reached the initial setting state. 2) Use a mechanical trowel to tap the slurry in a round motion. For fine areas, use a wooden trowel to trim the edges. The main purpose is to smooth the concrete surface and reduce the floating slurry. Pay attention to troweling in the same direction as pouring. 3) Sprinkle the wear-resistant aggregate in two batches. In the first batch, evenly spread two-thirds of the wear-resistant material on the already troweled cement floor. 4) For the second time, evenly spread the remaining 1/3 of the wear-resistant material on the surface of the concrete, and use a mechanical trowel with a disc installed to work crisscross and cross at least twice. 5) Use a mechanical trowel (metal disc) to smooth it out multiple times back and forth. For the fine corners and edges, use a manual trowel in coordination with the construction. The time for the next process should be determined based on the temperature and humidity. 6) When the surface of the floor begins to harden, use a mechanical trowel with a metal blade to grind and smooth it, and repeat this operation 3 to 4 times. (Construction workers must wear soft flat shoes to avoid damaging the surface. The fine corners and edges should be polished by hand.) 7) Water curing should be carried out on the polished wear-resistant floor (mainly to prevent the evaporation of surface moisture and ensure the stable growth of the wear-resistant material's strength). The curing period is 7 days. 8) After the surface has cured for a certain period of time (5 to 6 hours after the completion of the wear-resistant material floor), use a mechanical trowel equipped with a metal blade for the final polishing and leveling. 9) Mold and compartment cutting (this can be done according to the actual situation on site and the owner's needs). Mold removal can be carried out the day after the completion of the diamond sand floor. During the operation, be careful not to damage the edge of the floor. The size of the compartments shall be determined by Party A on the third day after the completion of the diamond sand floor. 2. Application of penetrating liquid hardener (commonly known as curing agent) The original color of the diamond sand floor should be cured for more than 14 days, while the colored diamond sand floor usually needs to be cured for 28 days. Only after the color has matured can the penetrating liquid hardener be applied. The specific measures are as follows: Before construction, clean and remove debris, oil stains, paints, curing agents, etc. from the ground. If there are any pits or cracks, they should be repaired in advance with cement-based jointing mortar and maintained for 3 days. If no repair is needed, proceed with the construction directly. 2) Sprinkle water on the base layer until it is fully moistened. Do not sprinkle too much. 3) Use a 50-mesh resin grinding disc to grind the base layer, removing the floating slurry and stains on the base layer to make it free of roughness and gradually smooth. 4) After the 50-mesh grinding is completed, use a 150-mesh resin grinding disc for grinding. After grinding, use a high-power vacuum cleaner to suck up the mud and sewage on the surface of the base layer. 5) Sprinkle water on the surface of the base layer and grind it with a 300-mesh resin grinding disc (the ground should be ground evenly in a grid pattern, and the machine's pushing speed should be one step per second to grind off the remaining materials and fine scratches on the ground). After grinding, grind it with a 500-mesh grinding disc. Then, use a vacuum cleaner to suck up the wastewater and ventilate to dry the base layer. 6) After the base layer is dry, if the surface turns slightly white, apply the concrete sealant and hardener. Sprinkle the material evenly and spread it evenly with a mop. Keep the base layer surface moist for 30 minutes. If there is rapid penetration in some areas and it has dried, sprinkle the material again and use a mop to evenly moisten the base layer. 7) After 30 minutes, the surface of the concrete sealant and hardener begins to thicken. Water should be sprinkled on its surface and pushed back and forth with a long-bristled brush or floor scrubber to dilute the excess hardener and better penetrate into the base layer. After one hour, the excess material and water should be sucked dry with a vacuum cleaner to ensure that the base layer is dry for more than 12 hours. 8) After 12 hours, sprinkle water on the base surface of the completed construction material, and grind it with a 500-mesh resin grinding disc to remove the excess material. Then, grind it with a 1000-mesh grinding process. After grinding, use a vacuum cleaner to suck up the wastewater. 9) After 12 hours, the base layer has basically dried. Then, it is ground and polished with a 2000-mesh resin grinding disc to gradually give its surface a lustrous appearance. 10) For each mesh size, the grinding discs should be cross-ground 3 to 5 times in both the longitudinal and transverse directions. 11) Special treatment ① Corner and edge treatment: Large machinery can only be used for large-scale grinding. For corner and edge positions, a portable Angle grinder should be used for grinding and polishing, following the same method as for large-scale construction. When the base layer has poor strength and severe sanding, it is necessary to reinforce the base layer first, and then proceed with the normal construction process. First, use a 300-mesh resin grinding disc to remove the floating slurry on the surface of the base layer. Then, evenly sprinkle the concrete sealant and hardener to ensure it fully wets and penetrates into the base layer. After 12 hours, when the concrete sealant and hardener has cured and the strength of the base layer has improved, follow the normal process: 50-mesh grinding (water grinding) → 150-mesh grinding (water grinding) → 300-mesh grinding (water grinding) → construction materials → 12-hour drying and curing → 500-mesh grinding (water grinding) → 1000-mesh grinding (water grinding) → 2000-mesh grinding (dry grinding). The aesthetic effect of the floor cannot be achieved without meticulous control during the construction process. Besides strictly adhering to the corresponding techniques and methods, the prevention of common quality problems also requires attention. If the construction is not done properly, many problems will occur during later use. Now let's talk about the common quality problems of the diamond sand wear-resistant floor and how to prevent them. There are mainly three reasons for the color difference of corundum: 1) Material selection issues; 2) The materials were not spread in several portions, the amount of materials used was insufficient, and the thickness was uneven. 3) Maintenance issues: The use of covering with plastic film for maintenance led to uneven evaporation of ground moisture. The area where the film comes into contact with the floor is whitish, while the area where it does not touch the floor is normal in color. Preventive measures Choose a manufacturer with stable and reliable product quality and a good reputation. 2) The spreading of materials should be carried out strictly in accordance with the requirements of the briefing in several portions, with a usage of no less than 5kg/m². 3) Plastic film curing is strictly prohibited. During summer construction, water spraying curing can be adopted in several batches (with an interval of 2 to 3 hours). The allowable deviation of ground flatness is ≤2.5mm/2m in both longitudinal and transverse directions. The reasons for the deviation during construction are: 1) The template setup is out of tolerance; 2) The concrete part was not leveled in accordance with the standard. 3) The wear-resistant material is not evenly spread. Preventive measures 1) Strictly calibrate the elevation lines. Set up steel rods every 2 meters or so. The elevation of the steel rods should be the same as that on the longitudinal seam formwork. Check with a level. 2) The joints should be roughened and leveled in advance. When pouring new concrete, the levelness should be consistent with that of the already poured ground. Any low-lying areas should be replenished and filled in a timely manner. 3) Wear-resistant aggregates should be spread in two portions. The first dosage should be two-thirds of the total dosage. Ensure that the mixture falls evenly. Do not throw it forcefully to avoid the separation of aggregates and cement. After the wear-resistant material has absorbed a certain amount of moisture, it is ground and dispersed with a grinding machine and then combined with the base concrete slurry. For the second spreading, apply the remaining one-third in a direction perpendicular to that of the first spreading. When spreading, first use a straightedge or a straight scraper to measure the levelness, and adjust the uneven areas of the first spreading. After spreading, immediately smooth and polish it, and repeat the grinding machine operation at least twice. When the grinding machine is in operation, it should be carried out alternately in the longitudinal and transverse directions, evenly and orderly, to prevent material accumulation. The third time mainly involves repair treatment. For low-lying areas, materials are replenished and leveled. For corners and edges that cannot be covered by the grinding machine, manual flattening and smoothing are adopted. There are the following situations regarding ground cracks: If the initial setting time of concrete is not well controlled and the diamond sand wear-resistant aggregate is scattered when the moisture content of the concrete is relatively low, it is easy to cause cracks after the construction is completed. 2) Improper construction methods, insufficient thickness of the wear-resistant layer (corundum layer), rapid water loss (such as excessive construction environment atmosphere, etc.), resulting in volume shrinkage and linear shrinkage, causing cracks or hollowing. 3) Improper maintenance: After the completion of construction, the ground was not maintained within the prescribed time or was not adequately watered for maintenance. When the concrete temperature is relatively high, pouring cold water for curing can also cause cracks. Note: When using only the diamond sand floor, it is recommended to use a maintenance agent (oily and film-forming effect) to maintain the floor. If the corundum is reinforced (or epoxy), water curing can be directly adopted. 4) The contraction joint was cut late, and cracks appeared due to thermal expansion and contraction. Under normal circumstances, it is advisable to cut the expansion joints 24 to 48 hours after the completion of the construction of the corundum floor. If it is too late, as the hardness of the floor gradually increases, the floor is prone to "cracking" and developing cracks during the cutting process. 5) If the spacing of the division joints is too large, cracks may also occur. Preventive measures 1) Strictly control the time of the first sprinkling of materials; 2) The concrete layer and the wear-resistant layer (corundum) are constructed simultaneously. 3) The curing time shall be no less than 14 days; 4) Reasonably control the cutting time; The spacing of the division joints should generally not exceed 6m*6m. Cause of formation 1) The roughening and polishing processes are rough. 2) Inadequate maintenance and insufficient maintenance time; 3) The spreading time of wear-resistant aggregates is not well controlled. Preventive measures 1) Use a grinding machine to thoroughly smooth, compact and roughen the ground for no less than three times, and use a floor trowel to thoroughly smooth and level the ground for no less than three times. 2) The curing time shall be no less than 14 days; 3) Strictly control the spreading time of wear-resistant materials. The timing of spreading wear-resistant materials varies as needed, depending on factors such as climate, temperature, and concrete mix ratio. Spreading too early will cause the wear-resistant material to sink into the concrete and lose its effect. If it is spread too late, the concrete will gradually lose its adhesive force due to solidification, preventing the wear-resistant material from fully bonding with it. The most convenient way to determine the time for spreading wear-resistant materials is to let your feet sink about 5mm when stepping on the ground, and then you can start the first spreading work. The moisture at the edges of walls, columns, doors and formwork disappears more quickly. It is advisable to prioritize the application of water to prevent the effect from being reduced due to water loss. 1. Local damage: Clean the damaged area thoroughly, soak it in water to moisten it, then repair it with a putty made of styrene-butadiene latex mixed with water and a hardener material that has screened out the aggregates. Finally, apply the styrene-butadiene latex mixed with water emulsion. 2. Large-scale damage: According to actual needs, lines can be drawn and sawn on the damaged area, the surface layer and part of the base layer can be chiseled off, then the area can be cleaned and moistened, the plain cement slurry can be swept, concrete can be poured, and finally the surface layer of the diamond sand hardener can be applied. 3. Floor peeling: The surface of the wear-resistant diamond sand floor curls and peels. Remedial measures: Cut and chisel off the peeling area (chiseling it into a pitted surface), spray water on the pitted area to moisten it, then apply repair mortar of the same grade as the concrete and press it down to level the ground. Finally, apply a curing agent. 4. Remedial measures for cracks in diamond sand floor: 1) Cracks in areas with requirements for anti-seepage, impact resistance and wear resistance on the surface should undergo surface treatment. 2) For cracks that can affect the integrity, strength, impermeability and steel bar corrosion of the structure, grouting treatment should be carried out. 3) For cracks that endanger the safe operation of buildings, in addition to grouting treatment, other reinforcement measures should also be taken when necessary. 4) Cracks that are sensitive to temperature should be treated when the crack opening is relatively large in the later stage of the low-temperature season. 5) Flexible materials must be used to treat active cracks.   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.    

  How to debug and calibrate the concrete laser leveling before construction Concrete laser leveling machine is an indispensable key equipment in modern building construction. The stability and accuracy of its performance are directly related to the quality of the project. Therefore, it is crucial to debug and calibrate the concrete laser leveling before construction. This article will elaborate on the debugging and calibration steps of the concrete laser leveling before construction to ensure the accuracy and reliability of the equipment during construction. 1. Equipment inspection and preparation Before commissioning and calibration, the equipment needs to be thoroughly inspected and prepared. This includes: ★Make sure that the equipment is intact and all components are firmly connected and not loose or damaged. ★Check whether the power cord and control system are intact and not damaged or aged. ★Prepare the required calibration tools, such as spirit level, laser rangefinder, etc. ★Clean the equipment surface and working environment to ensure that no debris or obstacles affect the calibration process 2. Laser system calibration The laser system is the core part of the concrete laser leveling machine. Its accuracy and stability directly affect the leveling effect. The steps for laser system calibration are as follows: ★According to the equipment manual, install the laser transmitter correctly and ensure that its position is stable and eye level. ★Use a laser rangefinder to detect the projection distance and angle of the laser line to ensure it is consistent with the equipment setting value. ★Adjust the angle and position of the laser transmitter so that the laser line can be accurately projected onto the ground to be leveled. ★Use a spirit level to check the installation level of the laser transmitter to ensure that there is no deviation in the level of the laser line. 3. Levelness and flatness debugging Levelness and flatness are important parameters for debugging concrete laser leveling machines, which are directly related to the leveling effect. The debugging steps are as follows: ★Use a spirit level to check whether the chassis of the leveling machine is level. If there is any difference, adjust it in time. ★Set multiple detection points on the ground to be leveled, and use a laser rangefinder to measure the distance between the points and the laser line. ★According to the measurement results, adjust the leveling height and speed of the leveling machine so that the height of each point is consistent with the laser line. ★Monitor the level and flatness in real time during the leveling process. If there is any deviation, it needs to be adjusted in time. 4. Power system testing The power system is an important part of the concrete laser leveling, and its performance directly affects the operation of the equipment. The power system test steps are as follows: ★Check whether the lubricating oil or coolant of the engine or electric motor is sufficient and whether it needs to be replaced. ★Start the engine or motor and check whether it runs smoothly and whether there is any abnormal noise or overheating. ★Check the working condition of the transmission system, such as whether belts, chains, etc. are loose or worn. ★Check the oil pressure and flow of the hydraulic system to ensure it is working properly. 5. Safety device inspection Safety devices are the key to ensuring construction safety and stable operation of equipment. The safety device inspection steps are as follows: ★Check whether emergency stop buttons, safety switches and other safety devices are intact and free of damage or failure. ★Test the function of the safety device, such as whether the equipment can stop running immediately after pressing the emergency stop button. ★Check whether the safety warning signs around the equipment are clearly visible. 6. Operator training The operator's skill level and operating experience have an important impact on the debugging and calibration results of the equipment. Therefore, it is crucial to provide necessary training to construction personnel. Training content includes: ★Basic principles and structure of equipment. ★Operating procedures and safety requirements. ★Debugging and calibration methods and steps. ★Troubleshooting and emergency measures. 7. Troubleshooting and Prevention During the debugging and calibration process, various faults and problems may be encountered. Therefore, appropriate troubleshooting and preventive measures need to be taken. Specifically include: ★Analyze the possible causes of the failure based on the equipment instructions and failure symptoms. ★Use appropriate maintenance tools and methods to troubleshoot and repair faults. ★Carry out regular maintenance and upkeep on equipment to prevent failures. ★Establish a fault recording and analysis system, summarize experience and lessons, and avoid similar faults from happening again. 8. Inspection after debugging is completed After debugging and calibration are completed, a comprehensive inspection of the equipment is required to ensure that all parameters and performance meet the requirements. Inspections include: ★Check again whether all parts of the equipment are intact and whether the connections are firm. ★Use equipment such as a level ruler and laser rangefinder to recalibrate the levelness and light system of the equipment. ★Start the device and check whether it runs smoothly and has no abnormal noise or overheating. ★Carry out actual leveling operation test to check whether the leveling effect meets the requirements. Through the detailed elaboration of the above steps, we can see the importance and necessity of debugging and calibrating the concrete laser leveler before construction. Only by ensuring that the parameters and performance of the equipment meet the requirements can construction quality and efficiency be guaranteed. Therefore, in actual construction, we should strictly follow the debugging and calibration steps to ensure the accuracy and reliability of the equipment. At the same time, we should also strengthen the maintenance and upkeep of equipment to prevent the occurrence of failures and improve the service life and efficiency of the equipment.