When buying a used jogging machine, you need to pay attention to the following matters:### Equipment brand and model- **Choose popular brands**: Give priority to brands with high market recognition and good reputation, such as Charmilles, Shadick, Mitsubishi, Western, Fanuc, etc. These brands of equipment are more guaranteed in terms of quality, precision, stability and after-sales service, and it's also easier to find professional maintenance personnel and suitable accessories.- ** Determine the appropriate model **: According to their own processing needs, choose the right model. Need to consider the size of the workpiece, shape, precision requirements and other factors, such as processing of large workpieces can choose a larger table size model, the very high precision requirements of the selection of high-precision series of models.### Equipment color and use condition- **Appearance check**: Check whether the overall appearance of the equipment has serious wear and tear, collision, deformation, paint, etc., which may affect the performance and service life of the equipment.- **Internal parts inspection**: Check the various parts of the machine tool, such as rails, screws, nuts, etc. whether there is wear and tear, rust; electrical components, wiring, whether aging, broken; cooling system, lubrication system is working properly, there is no leakage, and so on. Open the protective door of the machine tool and observe whether there is dust accumulation and serious oil pollution inside.### Machining accuracy test- **Precision test**: If conditions permit, conduct actual processing tests to detect whether the processing precision of the equipment meets the requirements. Some standard specimens can be processed to measure its dimensional accuracy, shape accuracy, surface roughness and other indicators, such as processing a square specimen to measure its edge length accuracy, flatness, perpendicularity and so on.- ** precision retention **: understand the accuracy of the equipment to maintain the ability to ask the seller of the equipment used in the past, maintenance records, to see whether there is frequent maintenance or precision adjustment history. Generally speaking, the frequency of use is low, good maintenance equipment, its accuracy is relatively good.### Control system and function- **Control system check**: Check whether the version and function of the CNC system meet the demand, and whether the operation interface is clear, intuitive and easy to operate. Test the functions of the system, such as program input and output, coordinate display, parameter setting, automatic compensation and so on whether it is normal, there is no error message.- **Functional integrity**: Confirm whether the auxiliary functions of the equipment are intact, such as whether the automatic threading function is smooth and stable; whether the electrode wire tension control is accurate; whether the water flushing and oil spraying devices are working properly, and whether they can effectively cool down and remove chips.### Equipment source and legality- **Source channels**: Choose regular used equipment dealers or reputable individual sellers to buy, avoid purchasing equipment from unknown sources in case there are property rights disputes or other legal problems with the equipment. You can ask the seller to provide the original purchase invoice, contract and other relevant documents of the equipment.- **Equipment legality**: Make sure that the equipment purchased meets the relevant national laws and regulations and environmental requirements, such as whether it belongs to the elimination of equipment, whether there is a violation of the transformation and so on. Imported second-hand slow-feeding wire also need to check whether the import customs declaration procedures are complete.### After-sales service and guarantee- **After-sales commitment**: Ask the seller whether they provide after-sales service, such as the warranty period of the equipment, the scope of the warranty, maintenance response time. Some formal used equipment dealers will provide a certain period of warranty service, for buyers to solve the worries.- **Technical support**: understand whether the seller or dealer can provide technical support, including equipment operation training, troubleshooting guidance. For first-time buyers, good technical support is crucial.### Price Evaluation- **Market research**: Before buying, research the price of used slow-feeding equipment of the same brand, model and color on the market to understand the general price range and avoid losses due to price opacity.- **Price reasonableness**: According to the actual condition of the equipment, years of use, configuration and other factors, a comprehensive assessment of the price reported by the seller is reasonable. Generally speaking, the newer the equipment, the better the performance, the higher the configuration, the higher the price will be relatively, but note that the price is too high or too low may be problematic.

Here's what to look for when buying a used Dimond spark machine:### Equipment performance and quality- **Machining accuracy**: Check the flatness of the working table, the straightness of the longitudinal and transverse guide rails, and the positioning accuracy between the electrode and the workpiece, etc. You can test whether the actual machining accuracy meets the production requirements by machining test pieces.- **Electrode loss**: Understand the loss of electrode under normal processing conditions, electrode loss is too large will not only increase production costs, but also may affect the processing accuracy and efficiency.- ** discharge stability **: observe the stability of the spark machine in the discharge processing process, whether there is uneven discharge, arc discharge and other abnormal phenomena, discharge instability will lead to poor surface quality, slow processing speed and other issues.- **Mechanical transmission system**: Check the transmission accuracy of each axis, the wear of the screw nut and the lubrication and wear of the guide rail, if there are problems with the transmission system, it will affect the positioning accuracy of the equipment and the smoothness of movement.### Length of use and wear- **Length of use**: Ask about the service life of the equipment, and check the appearance of the equipment, worktable, electrode fixtures and other parts of the wear traces, in general, the use of a shorter period of time, less wear and tear of the equipment performance is relatively good.- **Core component condition**: Focus on the key components of the spark machine, such as the control cabinet of the electrical components, transformers, pulse power supply, etc. aging degree, can be viewed through the components of the appearance of the color, the presence of burn marks, and measurement of its resistance, capacitance and other parameters to determine.### Equipment Configuration and Functions- **Standard configuration integrity**: Check whether the standard configuration of the equipment is complete, such as electrode clamps, working fluid system, automatic fire extinguishing device, etc., the lack of the necessary configuration will affect the normal use of equipment.- **Optional Configurations**: Find out whether the equipment is equipped with optional configurations such as C-axis, automatic tool changer, on-line measurement system, etc. These configurations can improve the machining function and automation degree of the equipment, but will also affect the price of the equipment.### Working fluid system- **Working fluid tank cleanliness**: Check whether the inside of the working fluid tank is clean, free of impurities, sediments and oil, etc. If the working fluid tank is dirty, it may lead to contamination of the working fluid, which will affect the machining effect and the life of the equipment.- **Working fluid pump and filter**: Check the working condition of the working fluid pump, including whether the pressure and flow of the pump are normal, and whether the filter is clogged or not. Problems with the working fluid pump and filter will affect the circulation and filtration effect of the working fluid.### Control system- **Numerical control system version**: Understand the version and function of the numerical control system equipped with the equipment, the newer numerical control system usually has a better operation interface, stronger programming functions and higher control accuracy.- **Operation and Programming**: Check whether the operation of the CNC system is flexible and convenient, whether the function keys are normal, and whether the programming method of the equipment is in line with your habits and production needs.### Safety performance- **Protection devices**: Check whether the protection devices of the equipment, such as protection doors, guardrails, light curtain sensors, etc., are complete and effective, and the imperfect protection devices will pose a threat to the safety of the operators.- **Grounding and leakage protection**: Ensure that the equipment is well grounded and the leakage protection device is working properly to prevent electric shock accidents.### After-sales service and technical support- **Original manufacturer after-sales service**: Understand whether the original manufacturer also provides after-sales service, as well as the content of after-sales service, response time and charges, etc. Good after-sales service can provide protection for the use of equipment.- **Technical data integrity**: Check whether the technical data of the equipment is complete, including operation manuals, programming manuals, maintenance manuals, circuit diagrams, etc., complete technical data will help you better use and maintain the equipment.### Price and cost-effective- **Market price research**: Before purchasing, research the price of used Dimond spark machine with the same model and configuration on the market to understand its approximate price range, to avoid losses due to asymmetric price information.- ** Cost-effective assessment **: Considering the performance, quality, service life, configuration and other factors of the equipment, to assess its cost-effective, do not just take the price as the only selection criteria, sometimes the price is slightly higher but the performance of the equipment may be more valuable investment.### Equipment source and legality- **Equipment source channels**: Understand whether the source of equipment is legal, whether it is a formal enterprise or personal transfer, to avoid purchasing equipment of unknown origin or property disputes.- **Related documents and formalities**: Ask the seller to provide the purchase invoice, certificate of conformity, warranty card and other related documents and formalities to ensure the legitimacy and quality assurance of the equipment.

Prices for used Dimond spark machines vary by model, newness, configuration, etc. Below are some common price ranges and examples:- **Common Models and Prices**:    - **Dimondsback DM40B**: 90% new Dimondsback DM40B spark machine, the price is generally around 88,000 -90,000, such as Shenzhen Zhihongye Technology Co., Ltd. transfer of Dimondsback DM40B spark machine, 90% new, quoted at 88,900.    - **Dimonspark DM30B**: April 2020 Dimonspark DM30B spark machine, 9.9% new, the working stroke is X*Y*Z=300*210*270, the price is about 320,000.    - **Dimonshadik b40**: Normal use Dimonshadik b40 spark machine, 400x300 stroke, with disk, price is 68,800.- **Factors Affecting Price**:    - **Newness**: Brand new used Dimond spark machines, i.e., those that have been in use for a short period of time, have little wear and tear, and are close to new in terms of appearance and performance, are relatively expensive, generally about 20-30% less than the original selling price. Longer use, the appearance of significant wear and tear, performance has been reduced used Dimond spark machine, the price will be reduced by 30% -50%, or even more.    - **Configuration Differences**: Used Dimond spark machines with different configurations are priced differently. For example, used spark machines equipped with advanced configurations such as C-axis, automatic tool changer, and high-precision measuring system will cost 10-20% more than those with basic configurations.    - **Market supply and demand**: In the used equipment market, the supply and demand of Dimond spark machines will also affect the price. If there is a high demand for Dimond spark machines in the market at a given time and a relatively low supply, prices may rise; conversely, if there is an oversupply, prices may fall.

There are many differences between Dimond spark machines and other brands of spark machines, the following are some common comparisons: ### Machining accuracy- **Dimond spark machine**: the use of high-precision control system, high-quality transmission components and advanced manufacturing technology, its machining accuracy can reach the micron level, part of the model such as Hanbiao 450 mirror spark machine accuracy of up to 0.005mm, to meet the needs of a variety of high-precision parts manufacturing.- **Makino spark machine**: known for high precision and high grade, such as EDGE3i model through the fixed table design to achieve reliable and repeatable accuracy, and the use of full closed-loop servo control, installed with a linear scale to eliminate ball screw wear and heat caused by error, to ensure that the machine's machining accuracy.- **Shamill spark machine**: FORM20/FORM30 machine tools are equipped with GF AgieCharmilles original Swiss power supply and three-axis linear scale structure, which ensures the positional accuracy of the machine tools, and its high machining accuracy can meet the demanding requirements of roughness in mold processing and other fields.- **Mitsubishi Spark Machine**: It greatly improves the roughing and finishing efficiency under the premise of guaranteeing machining accuracy, which is suitable for cell phone shells, household appliances and other fields with certain requirements on accuracy, but the overall precision is generally inferior to that of the high-end models of Charmilles and Dimond. ### Machining efficiency- **Dimond spark machine**: the highest machining efficiency can reach ≥ 400mm3/min (40A), some new models or specific configurations of the efficiency can be further improved, and the equipment is highly stable, and can be maintained for a long time to maintain high efficiency machining state.- **Makino spark machine **: rapid traverse speed of up to 5000mm / min, its ATC system and other designs to further improve the processing efficiency and reduce the time of unattended operation.- **Charmilles Spark Machine**: The FORM 20 can output 80 amps of discharge energy, while the FORM 30 is 140 amps. The pulse power supply continuously optimizes each pulse, which dramatically reduces electrode loss, thus improving machining efficiency.- **Mitsubishi Sparks**: Improvements to the pulse power supply and control system have increased energy efficiency and processing speed, effectively reducing the discharge time for large-area workpieces. ### Electrode loss- **Dimond spark machine**: Through advanced discharge control technology and power management system, the minimum electrode loss can be controlled at 0.1%, which reduces the number of electrode replacements, lowers the processing cost, and improves the continuity and stability of processing.- **Makino spark machine**: its electric discharge processing technology can better control the electrode loss, extend the service life of the electrode, to protect the processing accuracy and efficiency.- **Charmilles spark machine **: the brand's pulse power supply in the processing of continuous optimization, especially in the finishing process can significantly reduce the loss of electrodes, to ensure that the processing quality and efficiency.- **Mitsubishi spark machine**: With the development of technology, electrode loss control has also been improved, but compared to the former three in some processing scenarios electrode loss is relatively high. ### Equipment Price- **Dimond spark machine**: with a variety of models and configurations, a wide price range, the overall cost-effective and relatively high to meet the needs of different user groups, from small and medium-sized enterprises to the accuracy of the higher requirements of the workshop have the right model to choose from.- **Makino spark machine**: as an internationally recognized brand, Makino spark machine is usually more expensive, but its performance and accuracy is also in the industry's leading level, suitable for processing quality and stability of the strict requirements of the user with a more adequate budget.- **Shamill spark machine **: is a high-end spark machine brand, expensive, FORM20 and other basic models are priced at hundreds of thousands of dollars or even higher, but its precision machining performance and advanced technology to make it become the first choice for high-end mold manufacturing and other fields.- ** Mitsubishi spark machine **: its small machine models have a certain cost-effective advantage, better performance and relatively moderate price, suitable for small and medium-sized enterprises and some of the processing precision requirements are not extremely demanding users. ### Ease of operation- **Dimond spark machine**: Usually equipped with touch screen and USB interface and other input modes, the operation interface is simple and intuitive, supports straight lines, arcs, spirals and other interpolation modes, can be flexibly programmed according to different processing needs, reducing the operator's skills requirements.- **Makino Sparking Machine**: Adopting Windows-based MGH-6 control system, equipped with 15-inch touch screen display and MPG control function, it simplifies the programming of the machine tool through the top-down dialog interface, which is more convenient to operate.- **Charmilles spark machine**: Its CNC system integrates all common measuring cycles, allowing machining to begin without the need for the operator to make excessive workpiece adjustments, making it easy to operate and ergonomically designed for both economy and efficiency.- **Mitsubishi Spark Machines**: The operating procedures are relatively routine and require a certain level of operator expertise and experience, but are being simplified and optimized as technology develops. ### Field of application- **Dimond spark machine**: Widely used in automotive, aerospace, electronics, mold manufacturing and many other fields, its high precision and high efficiency makes it able to meet the processing needs of a variety of complex shapes and high-precision parts.- **Makino spark machine**: In addition to outstanding performance in the field of mold manufacturing, it is also commonly used in aerospace, medical equipment and other industries that require high precision and surface quality of parts.- **Shamill spark machine**: in the precision mold processing, especially for the surface quality consistency requirements of the injection mold manufacturing field has a significant advantage, but also for microfabrication and other special processing needs of the industry.- **Mitsubishi spark machine**: mainly used in the manufacture of punching molds, cavity molds, plastic molds, forging molds and die casting molds and other mold manufacturing areas, as well as processing of small holes, shaped holes, as well as the processing of threaded holes in the carbide and other aspects.    

Dimond spark machines have the following performance characteristics:### High rigidity- **Stable bed structure**: the machine bed adopts the whole T-shaped design, the bottom width of the bed with the “cross” table structure, effectively reducing the XY axis movement of the undulation error and deflection error, to ensure that the CNC axis in the full stroke movement to maintain stability, for high-precision machining provides a solid foundation.- **High-quality casting materials**: the use of high-quality strong cast iron, and the structure of the pressurized reinforcement of scientific and reasonable analysis, so that the body has excellent high precision and small thermal deformation characteristics, so as to achieve high-speed, high-precision machining performance.- **High Rigidity Spindle Design**: The single column spindle adopts high rigidity design to minimize the cantilever phenomenon and ensure accurate precision and high responsiveness, which is conducive to the high speed operation of the spindle and enhances the machining efficiency and precision.### High precision- **Precision transmission components**: Screws, guide rails, motors, etc. are selected from the international first-class quality products to ensure the stability and maintenance of the accuracy of the machine tool from the source, and to minimize the loss of accuracy due to wear and tear of the components and other factors.- **Precise control and compensation**: CNC axis adopts all-digital AC servo motors and high-precision ball screws directly connected, greatly reducing transmission errors. At the same time, the electrical system can carry out step compensation and gap compensation to further ensure the positional accuracy of the CNC axis movement. In addition, a fixed ratio compensation is set for each axis according to the micron-level drive accuracy results of laser measurement of each axis, thus ensuring that micron-level positioning accuracy and repeatable positioning accuracy are achieved.- **Strict precision inspection**: The machine tools are manufactured according to the Japanese JIS standard, and precision inspection is carried out at 20±2℃, with sufficient precision reserve before shipment to ensure the precision of the CNC axis movement, so as to ensure that the machine tools delivered to the users have reliable and high-precision machining capability.### High quality- **Rich process database**: There are as many as 11 kinds of electrode material pairs, covering from common steel materials, aluminum alloys, zinc alloys, copper alloys to super-hard materials (e.g. cemented carbide, polycrystalline diamond, etc.) and other special electrically conductive materials (e.g. magnetically conductive materials, high temperature and heat-resistant alloys, etc.), and the database supports the processing of electrodes made of copper, graphite, copper-tungsten alloys, and silver-tungsten alloys, which is applicable to the machining of everything from simple cavities to complex shapes and precision machining. The database supports copper graphite, copper tungsten alloy, silver tungsten alloy and other electrodes to meet the diversified needs from simple cavities to complex shapes.- **Reliable Quality Assurance**: Before the delivery of the product, it must go through a number of strict inspections of the machine accuracy, processing process indicators (including high-current full-power, mirror processing, large-area high-finish processing, small electrode loss processing, etc.), electrical reliability and other strict tests to ensure that the quality of the product is reliable, so that the user can rest assured that the product can be used.### High safety- **Multiple protection devices**: Liquid level protection, liquid temperature protection, automatic fire extinguishing device, etc., when the temperature of the working fluid reaches 60 degrees Celsius, the processing automatically stops; when the liquid level is lower than the processing of the necessary height, the processing will not be performed, effectively preventing safety accidents due to the problem of the working fluid, to ensure that the machine tool operation safety.- **Failure Alert Function**: Equipped with the functions of power failure resumption, contact sensing, diagnosis and error message prompting, etc., it can send out alarms and error message prompts in time to guide the operator to consult the manual and troubleshooting when the operation is wrong or there is a malfunction, which reduces the risk of the operation error or the equipment malfunction.### Outstanding machining performance- **High-efficiency machining**: The highest machining efficiency can be ≥400mm3/min (40A) or even higher, which can quickly complete the machining task, improve productivity, and save machining time and cost.- **Low electrode loss**: the minimum electrode loss can be controlled at 0.1%, effectively reducing the consumption of electrodes, reducing the number of electrode replacements, improving the continuity and stability of the processing, while also reducing processing costs.- **Mirror surface processing effect**: Through advanced discharge processing technology and precise control, it can realize the mirror surface processing effect with the best surface roughness of Ra0.1μm-Ra0.2μm, and the surface of the processed workpieces is as smooth as a mirror without the need of subsequent polishing, which greatly improves the appearance quality and usability of the products.### Convenient operation- **Humanized design**: usually equipped with touch screen and USB interface and other input modes, the operation interface is simple and intuitive, convenient for users to program and parameter settings, reducing the skill requirements of the operator and improving work efficiency.- Flexible Programming Function**: It supports various interpolation modes such as straight line, arc, helix, etc., which can be flexibly programmed according to different processing needs, realizing the processing of various complex shapes and meeting diversified processing requirements.### Cost-effective- **Balance between performance and price**: Dimond spark machine in the guarantee of high performance, high precision at the same time, pay attention to the cost-effectiveness of the product, to a more reasonable price for the user to provide high-quality machining equipment and solutions to help users in the premise of controlling the cost of improving the quality of processing and production efficiency.  

Dimond spark machine is a product of Beijing Dimondsbark Technology Co:### Series products- **A series mirror spark machine**: bed casting is C-shaped structure, equipped with windows operating system and a variety of copper electrode, graphite electrode special discharge circuit, including DM30A, DM40A, DM45A three specifications models.- **N Series Precision Mirror Sparking Machine**: The bed casting is C-shaped structure, including DR30N, DR40N, DR45N three specifications.- **H Series High Precision Mirror Surface Sparking Machine**: The bed casting is T-shaped structure, including DR350H, DR400H, DR450H, DR500H four specifications models.- **H series single bullhead integrated spark machine**: bed casting structure is bullhead type, suitable for medium and large workpiece processing, including DR800H, DR1000H, DR1200H three specifications models.- **H series double bullhead integrated spark machine**: bed casting structure for the double bullhead type, suitable for large-sized workpiece processing at the same time, including DR1400HR, DR1800HR two specifications.- **N Series Single Bullhead Sparking Machine**: The bed casting structure is double bullhead type, suitable for large-sized workpiece double-head simultaneous processing, including DR120NR, DR140NR, DR180NR four specifications and models.- **N series double bullhead spark machine**: bed casting structure of T-shaped bullhead combined with automatic lifting of the oil bath machining fluid, including DR400S a specification model.- **S Series Oil Tank Automatic Lifting Sparking Machine**: The bed casting is C-shaped structure, the oil tank is constantly optimized, including DM30A, DM40A, DM45A three specifications models. ### Technical Advantages- **Independently developed operating system**: The company has developed two sets of EDM CNC operating systems, DOS and WINDOWS, with original acquired software copyrights, which can realize three-axis to six-axis linkage electrical discharge machining .- **Multiple Processing Functions**: The company has accumulated a rich and perfect processing technology database in the field of EDM forming and discharging, such as precision mold manufacturing, complex shapes and processing of parts made of special materials.

To select the Sardick spark machine model that suits your needs, refer to the following methods:### Define processing needs- **Machining accuracy**: If you have very high requirements for machining accuracy, such as manufacturing precision molds, aerospace parts, etc., you can choose models such as AQ35L, AP3L, etc. These models are equipped with high-precision positioning system and advanced discharge control technology, which can achieve micron-level or even higher precision machining.- **Machining size**: According to the size of the commonly processed workpiece to determine the worktable stroke of the spark machine and the maximum overhanging mass of the electrode and other parameters. For example, when processing large molds, you can choose AG60LS, AL60G and other table size and stroke larger models; if the main processing of small precision parts, the AD32Ls, AD35L and other models may be more appropriate.- **Machining speed**: For mass production and the requirement of machining speed, such as automotive parts processing, etc., you can choose models with high-speed EDM capability, such as AD35L, AL60G, etc., which are equipped with high-performance power supplies and advanced discharge circuits, and are able to effectively improve the machining efficiency.### Consider the budget- **New Equipment Purchase**: The price of different SADIC spark machines varies greatly, with new high-end models such as the AL60G being relatively expensive, while basic models such as the AD32Ls are relatively affordable. In the case of limited budget, need to comprehensively consider the balance of performance and price, choose the cost-effective models.- ** Used equipment purchase **: Shadick spark machine prices on the second-hand market is usually much lower than the new equipment, but pay attention to the equipment's service life, wear and tear and maintenance records, etc., such as second-hand AD32Ls, LN1, and other models are more common, the purchase of the need to be careful to assess its performance and quality.### Focus on machine performance- **Electrode Loss Rate**: Electrode loss has a direct impact on machining costs and efficiency. Some models such as the AL60G are equipped with the latest discharge control technology “Arc-less 4” circuit, which reduces electrode consumption to the limit, effectively minimizing electrode loss and improving machining accuracy and surface quality.- **Surface roughness**: The surface roughness after machining varies from model to model. For example, the AP3L's “SUPERSVC” circuit suppresses unevenness in surface roughness, resulting in high-quality dark or mirror surfaces in a short period of time, which makes it suitable for machining tasks with high demands on surface quality.- **Automation**: If automation is required, choose a model that supports automation functions, such as the AD35L, which can be fitted with an inline shuttle ATC, and also supports automation configurations such as ATC for large electrodes, and the addition of a gadget function in the operator interface, which improves productivity and ease of operation.### Learn about after-sales service- **Technical Support**: As a well-known brand, SADIC's official after-sales service is usually more complete, but the technical support capability may vary in different regions and dealers. When choosing a model, you can learn about the technical strength and response speed of local dealers or after-sales service centers to ensure that problems encountered during use can be solved in a timely manner.- **Accessories supply**: Consider the availability and price of accessories, some common models of accessories are easier to obtain, and the price is relatively stable, while some special models of accessories may have a longer supply cycle or higher prices, which will affect the cost of maintenance and downtime of the equipment.### Reference to user reviews and cases- **User Word of Mouth**: Through internet search, industry forums, peer exchanges, etc., learn about user evaluations and feedback on the use of different models of Shadick sparking machines, including information on the stability, reliability, and maintenance of machining accuracy of the equipment, so as to have a more comprehensive understanding of the actual performance of each model.- **Successful Cases**: View the successful cases provided by Shadick or distributors to understand the application of each model in different industries and processing areas, as well as the processing results and economic benefits achieved, to provide a reference for choosing the model that suits your needs.

Here are some ways to improve the machining accuracy of Sardick spark machines: ### Electrode selection and preparation- **Selected electrode materials**: according to the processing requirements to select the appropriate electrode materials, such as copper electrode conductivity is good but relatively large loss, graphite electrode loss is small but the processing surface quality may be slightly poor, tungsten-copper and silver-tungsten alloy composite materials such as better overall performance, according to the specific processing object and precision requirements of the trade-offs between the choice.- **Ensure the precision of electrode**: the manufacturing precision of electrode should be higher than the precision of the workpiece, the manufacturing tolerance is usually taken as about 1/2 of the tolerance of the workpiece, including the dimensional accuracy, shape accuracy and surface roughness, etc., should be strictly controlled.- Optimization of electrode design**: When designing the electrode, factors such as discharge gap, chip removal and heat dissipation should be taken into consideration. Reasonable electrode shape and structure can help to improve machining accuracy and stability, for example, multi-electrode machining and electrode flattening can be used to improve machining effect. ### Optimization of machining parameters- **Precise control of pulse parameters**: Reasonable selection of pulse parameters such as pulse width and peak current. Generally speaking, reducing pulse width and peak current can reduce surface roughness and improve machining accuracy, but it will reduce machining speed accordingly, so it is necessary to find a balance between accuracy and efficiency according to the specific machining requirements.- **Stable discharge gap**: maintain the stability of the discharge gap is critical to the processing accuracy, can be achieved by adjusting the electrical parameters of the pulse power supply, optimize the servo control system, etc., at the same time to pay attention to the secondary discharge caused by the corrosion products on the impact of the discharge gap, and clean up the corrosion products in a timely manner.- **Reasonable setting of servo reference**: According to the electrode material, workpiece material, processing depth and other factors, reasonable setting of servo reference to ensure that the electrode and the workpiece between the discharge state is stable, to avoid the decline in machining accuracy due to improper setting of servo reference. ### Management of working fluid- **Select suitable working fluid**: Different working fluids have different insulation, cooling and chip removal properties, and suitable working fluids should be selected according to the machining requirements and electrode materials, e.g., in finishing machining, working fluids with lower viscosity and good insulation properties can be selected to obtain better machining surface quality.- **Keep the working fluid clean**: Replace the working fluid and the filter paper core regularly to prevent the impurities in the working fluid and the products of galvanic corrosion from affecting the machining accuracy, and it is generally recommended to replace the filter paper core when the pressure indication is less than 0.18Mpa.- Optimize the flushing method of the working fluid**: According to the shape and requirements of processing, choose the appropriate flushing method, such as side flushing, bottom flushing or circular flushing, etc., to ensure that the products of galvanic corrosion can be discharged in time, and the temperature of the processing area is uniformly distributed, so as to avoid the machining accuracy problems caused by uneven flushing. ### Workpiece clamping and positioning- **Ensure clamping accuracy**: Use high-precision fixtures and clamping methods to ensure that the workpiece will not be displaced and vibration in the process of machining, and the clamping force should be moderate to ensure that the workpiece is firmly fixed, but not to deform the workpiece, which will affect the machining accuracy.- **Precise positioning methods**: the use of appropriate positioning reference and positioning tools, such as edge finder, tool setting instrument, etc., to improve the positioning accuracy of the workpiece, positioning error should be controlled within the allowable range to ensure the consistency and accuracy of the machining dimensions. ### Maintenance and upkeep of machine tools- ** Regularly check the precision of the machine tool **: Regularly check and adjust the precision of the key components of the Shadick spark machine such as the guide rail of each axis, ball screw, etc. to ensure that the machine tool's coordinate axis movement accuracy, table flatness, spindle verticality and other indicators meet the requirements, generally recommended every three months for the machine tool guide rail ball screw lubricant injection.- ** Keep the machine clean and stable environment **: Keep the machine body and table clean to prevent oil, chips and other debris into the machining area, affecting the machining accuracy, and at the same time pay attention to the processing environment of the temperature and humidity control, to avoid the temperature difference is too large to cause deformation of the machine tool, affecting the machining accuracy.- **Timely maintenance and replacement of components**: found that the machine parts are worn or damaged, should be timely maintenance or replacement, such as electrode chuck, wire and other parts of the damage will affect the transmission of discharge energy and machining accuracy, must be dealt with in a timely manner.

The following are some of the factors that will affect the machining accuracy of Shadick spark machine: First, the electrode factors Electrode materials: different electrode materials have different physical properties, such as copper electrode conductivity is good but relatively large loss, graphite electrode loss is small but the processing surface quality may be slightly worse, the choice of electrode materials will affect the processing accuracy. For example, in the processing of some high-precision molds, according to the requirements of the mold and the material characteristics of the choice of the appropriate electrode material. Electrode precision: the manufacturing precision of the electrode is directly related to the machining accuracy, if the electrode itself is not up to the standard size tolerance, shape accuracy, then the precision of the processed workpiece will also be affected. Generally speaking, the manufacturing tolerance of the electrode should be controlled at about 1/2 of the tolerance of the workpiece. Electrode loss: In the process of spark machine machining, the electrode will produce loss due to discharge, uneven electrode loss will lead to a decline in machining accuracy. For example, in the processing of corners, edges and other raised position, the electric field strength is higher, the electrode loss is faster than the flat position, thus affecting the shape of the workpiece precision. Processing parameters Pulse width and peak current: increasing the pulse width and peak current will increase the individual pulse energy, which will lead to an increase in the roughness value of the machined surface, affecting the machining accuracy. However, if you want to improve the processing speed, often need to correspondingly increase the current, which requires a balance between the processing speed and accuracy. Discharge gap: the size of the discharge gap and its consistency has an important impact on the machining accuracy. Discharge gap is too small, easy to produce arc, short circuit and other abnormal discharge phenomena, damage to the electrode and the workpiece, affecting the machining accuracy; discharge gap is too large, it will make the processing of dimensional deviation increases. In addition, the secondary discharge caused by galvanic corrosion products will also affect the stability of the discharge gap, which in turn affects the machining accuracy. Servo base: servo base set unreasonable will lead to electrode and workpiece discharge between the state is not stable, affecting the machining accuracy. Third, the working fluid factors The type and performance of the working fluid: different working fluids have different insulation properties, cooling performance and chip removal performance, choose the right working fluid can improve machining accuracy. For example, in finishing, the need to use a lower viscosity, good insulation properties of the working fluid, in order to obtain a better machining surface quality. The degree of contamination of the working fluid: the dirtier the working fluid, the more opportunities for secondary discharge, which will lead to an increase in the number of electrode liftback, so that the machining slope increases, affecting the machining accuracy. Fourth, the workpiece factors Workpiece materials: different workpiece materials have different electrical conductivity, coefficient of thermal expansion and other physical properties, these properties will affect the machining accuracy of the spark machine. For example, some of the high hardness, high strength materials are more difficult to process, easy to produce cracks and deformation, affecting the machining accuracy. Workpiece clamping and positioning: workpiece clamping and positioning accuracy directly affects the machining accuracy, if the workpiece is not firmly clamped or positioning inaccurate, displacement and vibration will occur during the machining process, resulting in reduced machining accuracy. Fifth, equipment factors The precision and rigidity of the machine tool: the precision and rigidity of the Shadick spark machine itself is the basic factor affecting the machining accuracy. If the machine's coordinate axis movement accuracy is not high, the table flatness is not good, the spindle verticality deviation, etc., will lead to reduced machining accuracy. Control system: Advanced control system can realize more precise machining control, such as precise electrode feed control, discharge energy control, etc., so as to improve machining accuracy. If the performance of the control system is not good, there will be control errors, affecting the machining accuracy. Temperature and humidity: Changes in ambient temperature and humidity will affect the precision and stability of the machine tool, which in turn affects machining accuracy. For example, the deformation of cast iron at a temperature difference of 1°C is about 1.1μm/m. Excessive humidity will affect the life of the circuit boards in the machine. Vibration: Vibration during machining will make the discharge state between the electrode and the workpiece unstable, resulting in obvious line marks, affecting the machining accuracy.

The performance and accuracy of Shadick spark machines are at a higher level in the industry, the following is a detailed introduction: First, performance High processing precision: the processing precision of Shadick spark machine is extremely high, the dimensional accuracy can be controlled at ± 0.005mm or even higher, which can meet the strict precision requirements for molds and precision parts, for example, in the field of optical parts, precision connectors and other areas of extremely high dimensional accuracy requirements have excellent performance. High processing efficiency: Equipped with high-performance discharge power supply and advanced processing circuit, the discharge energy utilization rate is high, the processing speed is fast, which can effectively shorten the processing time and improve the production efficiency. For example, when processing large-area, porous and high hardness materials, its efficiency advantage is more obvious than other ordinary spark machines. Good surface quality: through the optimization of discharge parameters and processing technology, can obtain good processing surface quality, low surface roughness, some models can even reach the mirror effect, without the need for subsequent polishing treatment, saving processing time and cost, especially suitable for molds and parts with high requirements for surface quality processing. High degree of automation: with automatic electrode exchange device, automatic liquid level adjustment function, automatic monitoring of the processing process and compensation function, etc., can realize unmanned high-precision machining, improve the production efficiency and quality of machining, reduce labor costs and labor intensity. Wide range of adaptability: it can process a variety of conductive materials, including cemented carbide, hardened steel and other difficult-to-machine materials, and can also process deep and fine holes, shaped holes, deep grooves, narrow slits, and other complex shapes of the parts, the adaptability of the processing of different shapes and materials, and has been widely used in the mold manufacturing, aerospace, medical equipment and many other industries. Strong stability: the use of high-quality mechanical structure and advanced control system, the stability and reliability of the machine tool is high, and it can run stably for a long time, reducing the production delays and quality problems caused by equipment failure. Second, precision High repetitive positioning accuracy: Generally, the repetitive positioning accuracy of Shadick spark machine can reach 2μm, which ensures that the positioning accuracy of the workpiece is always maintained at a high level during multiple machining processes, thus guaranteeing the consistency and stability of the machining dimensions. High accuracy of straightness and perpendicularity: the coordinate axes of the machine tool have good straightness and perpendicularity in the process of movement, which makes the machined parts more accurate in shape and size, and it is especially important for the machining of molds and parts that need to ensure the accuracy of shape. High precision of discharge gap control: the discharge gap between the electrode and the workpiece can be precisely controlled, generally between 0.1-0.01mm, thus realizing high-precision machining dimensional control and ensuring the machining precision and surface quality.

Shadick is a high-performance EDM machine tool produced by Shadick Japan, which is widely used in mold making and other fields, the following is its detailed introduction: I. Features High-precision machining: Shadick spark machine adopts advanced technology and precise mechanical structure, which can realize high-precision machining. For example, the machining accuracy of some of its models can be controlled within ± 0.001mm, which can meet the processing needs of industries with extremely high requirements for mold accuracy, such as electronics, optics and other fields. High machining efficiency: Equipped with a high-performance discharge power supply and advanced machining circuits, it is possible to improve the utilization of discharge energy and accelerate machining speed. For example, the AL60G model adopts the newly developed “SP power supply” and related new control technology and new circuits, resulting in significant improvements in processing speed and quality. Good surface quality: By optimizing the discharge parameters and processing technology, good surface quality can be obtained, reducing surface roughness, and some models can even achieve mirror effect without subsequent polishing treatment, saving processing time and cost. High degree of automation: Equipped with automatic electrode exchange device, automatic liquid level adjustment function, automatic monitoring and compensation function of the machining process. Take the high-speed automatic threading device as an example, it can realize high-precision processing under unmanned operation, which improves the production efficiency and processing quality. Linear motor drive technology: Some high-end models adopt linear motor drive, such as AL series, ALN800G, etc. Compared with the traditional ball screw drive, it has higher response speed, better followability and higher positioning accuracy, and it can realize more stable and precise machining motion control. Common models and parameters 1、AL60G : Stroke of each axis: X×Y×Z is 600x420x370mm; Maximum overhang: 50kg; Maximum workpiece weight: 1500kg; Machine body size: W×L×H is 1740x2785x2570mm; Equipped with: linear motor drive, “SP power supply”, “Arc-less 4” circuit and machining auxiliary function “LN Pro AI”. 2、ALN800G Stroke of each axis: X-axis 800mm, Y-axis 600mm, Z-axis 500mm; Features: Suitable for large-size, high-plate-thickness machining, the machine is equipped as standard with an automatic three-sided upper and lower machining chute that supports 500 mm plate thickness impregnation machining, and a ceramic-based “mouth-shaped” workpiece holder, etc., which enables continuous, unmanned operation for high-speed, high-precision machining. VN400Q : Stroke of each axis: X-axis 400mm, Y-axis 300mm, Z-axis 230mm; Features: Entry-level linear motor-driven WEDM machine, standardly equipped with tension servo function, automatic threading device, precision thermal displacement correction function, etc., and the processing assistant system “Heart-NC” with easy programming function, suitable for beginners, and low energy consumption. Application Fields Mold Manufacturing: It is used to process various molds, such as injection molds, die-casting molds, stamping molds, etc. It can make complex shapes of cavities and cores, improve the precision and quality of the molds, and prolong the service life of the molds. Precision parts processing: capable of processing various precision parts, such as aerospace parts, medical equipment parts, electronic components, etc., to meet the requirements of these fields on the parts of high-precision, high-performance. Special processing: For materials and shapes that are difficult to process by traditional processing methods, such as carbide, hardened steel, deep and fine holes, shaped holes, deep grooves, narrow slits, etc., Shadick spark machines have unique processing advantages, which can realize efficient and precise processing.

Here are some factors that can affect the price of a used spark machine: ### Brand and model- **Famous brands**: such as Switzerland Charmilles, Japan Shadick, Makino, Mitsubishi and other brands, because of its excellent performance in technology development, manufacturing process, product performance and stability, market recognition, so the second-hand price is also relatively high. For example, a second-hand Charmilles FORM20 with powder mixing function of the mirror spark machine price of about 110,000 yuan, while the price of ordinary brands of similar models of second-hand spark machine will be much lower.- **High-end models**: usually have more advanced features, higher machining accuracy and efficiency, the price will be much higher than the low-end models. For example, Sardick's high-end mirror spark machine series is several times more expensive than ordinary spark machines. ### Age and Newness- **Short service life**: The wear and tear of the equipment is relatively small, and the performance and accuracy of the components are well maintained, so the price will be relatively high. Generally used 1-3 years of second-hand spark machine, the price may be about 60% -80% of the price of the original equipment.- **Good appearance and internal color**: the appearance of the equipment is not obvious scratches, paint, internal electrical components, mechanical transmission components, etc., no serious signs of aging, damage, close to the new state of the second-hand spark machine, the price will be 10-30% higher than the same type of equipment, but the color of the equipment is poor. ### Configuration and Features- **Highly Configured Components**: Spark machines equipped with key components such as high-precision electrode fixtures, advanced numerical control systems, and high-performance discharge power supplies are more accurate and efficient in processing, and the price will rise accordingly. For example, the use of high-precision ball screw drive spark machine, its second-hand price is more expensive than the ordinary screw drive spark machine.- **Special Functions**: With some special processing functions, such as mixing powder processing function, microfabrication function, five-axis linkage processing function, etc. spark machine, because it can meet the specific processing needs, the second-hand price will be higher than the ordinary function of the spark machine. For example, the Charmilles F053HSFS model has a powder mixing function, and the used price will be affected by this function. ### Machining Accuracy and Performance- **High Precision**: Machining precision spark machine, such as can reach ± 0.001mm or even higher precision equipment, in the second-hand market is more favored, the price will be higher than the accuracy of the general equipment. Because the high precision spark machine for processing precision molds, high-end parts and other important significance, can create higher value for the user.- **High processing efficiency**: fast processing speed, low electrode loss, good surface quality of the spark machine, its second-hand price will be relatively high. For example, some of the advanced discharge technology and optimized processing parameters of the spark machine, can ensure the processing accuracy at the same time, significantly improve the processing efficiency, the second-hand price of such equipment will be higher than the ordinary efficiency of the spark machine about 20% -50%. ### Market supply and demand- **Market demand is high**: When the demand for used spark machines in the market is greater than the supply, the price tends to rise. For example, in the peak season of the mold manufacturing industry, the demand for spark machines increases, and the price of used spark machines will also rise .- **Rare Models**: Some rare models of spark machines that have been discontinued or produced in limited quantities will be priced higher due to the scarcity of them on the market and the demand for them by specific user groups. ### Maintenance records of equipment- **Complete records**: Used spark machines with detailed and standardized maintenance records indicate that the equipment has been well maintained and managed in the process of use, and its performance and life span are more guaranteed, and the price will be relatively higher.- **Regular Maintenance**: If the equipment can be regularly maintained in accordance with the manufacturer's requirements, replacement of wearing parts, etc., its used price will be about 10-20% higher than the lack of maintenance of the equipment.