6836 results about "Computer printing" patented technology

The invention discloses an ink-jet printing control method and device for a perovskite battery and computer equipment, and the method comprises the steps: obtaining the time sequence characteristics of a current ink droplet in a process of falling to a perovskite battery substrate, and the spreading morphological characteristics of the current ink droplet on the perovskite battery substrate, the environmental characteristics are obtained in the process that current ink droplets are ejected by an ink-jet printer to form a film on a perovskite cell substrate; performing defect identification according to the time sequence features, the spreading morphological features and the environment features to obtain a current defect type; matching in a preset parameter adjustment rule according to the current defect type, and determining a target parameter adjustment strategy; and the printing process parameters are adjusted based on the target parameter adjustment strategy, and subsequent ink-jet printing is carried out based on the adjusted printing process parameters. Therefore, the problem of film forming defects caused by environmental fluctuation is solved, the uniformity of the perovskite cell film is improved, and the defect rate is effectively reduced.

The invention discloses a self-service printing regulation and control method and system for multiple printers, and relates to the technical field of printers, basic metadata of a to-be-scheduled task and user side information are obtained through a printing request initiated by a computer, and periodic polling is performed on all printers to obtain state parameters and attribute parameters, and a data set is formed; reading a data set from a memory through a processor to obtain an instant load and a candidate matching set through operation, and determining target equipment of a corresponding task to be scheduled by analyzing the working load distribution condition of the whole printer cluster, updating the candidate matching set and combining user side information; monitoring operation data of each printer in the candidate matching set in real time, and judging whether to trigger a congestion suppression mechanism to enter a shunting stage or not based on the operation data; and if entering the shunting stage, counting a shunting sequence, and sequentially performing shunting operation on each to-be-shunted task in the shunting sequence to realize self-service printing regulation and control.

The invention provides an intelligent image processing method and device for UV curing 3D ink-jet printing and a storage medium, and the method comprises the steps: carrying out the contour feature extraction of a slice image, and intelligently recognizing a supporting region based on the interlayer contour change and geometric features; printing data corresponding to the color ink layer, the white ink layer, the gloss oil layer, the shaping layer and the supporting layer are generated according to the contour features, the shrinkage judgment result and the overhanging area recognition result, the printing data serve as spot color channels and are combined with CMYK channels of the color ink layer, halftone processing is carried out on the data of the channels, and the color ink layer is obtained. And finally, generating and outputting a TIF format image file comprising at least eight channels, wherein the TIF format image file is used for driving the UV curing 3D ink-jet printer, the equipment and the storage medium storage and is used for realizing the intelligent image processing method during execution. According to the method, the printing precision and the material utilization rate are improved, and the problems of support generation, color management and quality control in multi-material 3D printing are effectively solved.

The application discloses a kind of based on 3D printing's three-dimensional model slice path processing method and device. Including: control 3D printer to starting point as starting point;Based on the region surrounded between starting point and reference point, determine the printing point to be printed that 3D printer needs to execute printing action during executing 3D printing job;Starting point and the printing point to be printed are sequentially connected by smooth straight line, generate printing path;Based on printing path control 3D printer executes 3D printing job and obtains target object, to effectively reduce the number of line segments of slice contour line of three-dimensional model forming target object, avoid 3D printer in printing job, in the pause frequency of line segment head, tail, simultaneously avoid the problem that 3D printing model surface protrusion is caused by long time scanning due to pause.In reducing pause frequency, printing is more smooth, improve printing efficiency, simultaneously also reduce algorithm complexity, help the simplification of algorithm.And effectively simplify the algorithm of 3D printer.

The technology described herein is directed towards a metasurface arranged with unit cells for broadband and / or multiband sound absorption, in which the unit cells are based on the principles of Helmholtz resonators. Deeply subwavelength sound absorbing unit cells are designed and constructed based on desired resonance frequencies. Each unit cell includes a neck portion and air chamber dimensioned to resonate at a desired resonance frequency and thereby inverse phase cancel corresponding frequencies of incoming sound waves. Differently designed and arranged subgroups of unit cells are part of the metasurface, which can be positioned proximate to a noise source. As practical examples, the metasurface or multiple metasurfaces can be placed near or wrapped around a computer server or rack of servers to absorb fan noise. The metasurface components (including the unit cells) can be printed by a 3D printer to result in a thin, light-weight, and cost effective noise absorbing metasurface.

The invention relates to the technical field of industrial control systems, in particular to an ink path control system of a full-color printer, which comprises the following specific implementation steps of: measuring a plurality of physical quantities in a controlled physical process in real time, and outputting the physical quantities as state variables and external disturbance signals; receiving a state variable and an external disturbance signal, performing future state prediction through a nonlinear dynamic process model, and generating a prediction result; constructing a process performance index function, optimizing the performance index function through a sparrow search optimization algorithm based on a prediction result, and generating an optimal target set value; through a model based on Bayesian reasoning, parameters of a PID control law are updated in a self-adaptive mode according to external disturbance signals; the controller is used for receiving the optimal target set value and the adaptive PID control law parameters, executing the PID control law in combination with a preset undisturbed switching module, and generating a final control instruction; and receiving a final control instruction, and converting the final control instruction into driving signals acting on a plurality of physical actuators so as to realize closed-loop feedback control of the controlled physical process.

The invention relates to the technical field of resistance test equipment, in particular to a portable loop resistance tester, which comprises a test and acquisition module used for acquiring current and voltage signal data of a tested product, analyzing a loop contact state and calculating a loop resistance value and impedance characteristic parameters; the control and output module is used for performing high-precision constant-current output and self-adaptive adjustment; the interaction and printing module is used for receiving a user operation instruction and displaying current and voltage signal data and a resistance value of a tested product, and meanwhile, printing is performed through a built-in thermal printer according to the user instruction; the power supply module is used for stably supplying power to equipment; and the intelligent diagnosis module is in butt joint with the cloud case library, automatically diagnoses related defect types influencing the loop resistance test, and generates a health assessment report. Therefore, the problems of small current output, insufficient sampling precision, single operation mode and the like in the prior art are solved.

A supporting program for a printer supports multiple sheet sizes. The supporting program, when executed by a controller of an information processing device, causes the information processing device to, in response to receiving a request from a universal printing program, obtain sheet size data representing a sheet size list including a first-type sheet size, and generate document size data including available document sizes including the first-type sheet size and a second-type sheet size. When the universal printing program receives a print instruction from an application program, the supporting program causes the information processing device to determine whether a document size of an image to be printed is included in the first-type sheet size; when the document size is not included in the first-type sheet size, scale the image to fit the first-type sheet size; and cause the printer to print the image to be printed or a scaled image.

The utility model relates to a secondary ink cartridge assembly for a printer, which comprises a secondary ink cartridge body, the secondary ink cartridge body comprises an ink cartridge body and an ink cartridge cover which are mutually sealed and covered, a high-pressure ink cavity, a low-pressure ink cavity and a normal-pressure ink cavity are arranged in the ink cartridge body, and the high-pressure ink cavity, the low-pressure ink cavity and the normal-pressure ink cavity are respectively provided with a liquid level sensor. The high-pressure ink cavity is sequentially communicated with the printing spray head, the low-pressure ink cavity, the normal-pressure ink cavity, the second ink pump, the bubble removing device and the first ink pump, so that ink flows out of the high-pressure ink cavity, sequentially flows through the printing spray head, the low-pressure ink cavity, the second ink pump, the normal-pressure ink cavity, the first ink pump and the bubble removing device and then flows back into the high-pressure ink cavity, and therefore a self-circulation ink path is formed. According to the secondary ink box, ink between the secondary ink box body and the printing spray head keeps continuous circulating flow, precipitation is avoided, the temperature of the ink entering the printing spray head is appropriate and constant, the bubble content is small, the pressure fluctuation is small, and therefore the printing quality is higher, and the printing effect is better.

The invention relates to the technical field of 3D printing, and discloses a fiber reinforced composite material 3D printer and a printing method, current deposition tows are heated / cooled under the action of a preset interlayer pressing force through an interlayer pressing device, interlayer fusion can be promoted, the interlayer bonding strength can be improved, the heat history in the wire cooling process can be eliminated, and the 3D printing quality of the fiber reinforced composite material is improved. The crystallization behavior, the grain size and the grain distribution of a polymer in a printing wire material are controlled, and the microscopic uniformity of a composite material printing product is improved. The side face and the upper surface of the current deposition tow are subjected to hot-pressing shaping through the inter-channel pressing device, meanwhile, secondary hot-pressing is conducted on the adjacent printing layer deposition tow, resin of the current deposition tow and resin of the adjacent printing layer deposition tow can be melted and flow, so that the inter-channel gap between the adjacent printing layers is filled, and the printing effect is improved. And the inter-track bonding strength is improved.

The invention discloses a visual alignment method and device for printing draft intelligent deflection and spraying vehicle cooperative control, and belongs to the technical field of machine visual localization, and the method specifically comprises the steps: firstly, arranging a calibration target in an ink-jet printing area, employing an image collection device to collect an image, and calculating a rigid transformation matrix of a visual coordinate system and a printer spraying vehicle coordinate system; establishing high-precision coordinate mapping; the control terminal reads the reference position and attitude information of the original draft in the spraying vehicle coordinate system from the production management system; the method comprises the following steps: after primary inkjet of a paperboard, shooting the whole paperboard by an image acquisition device, and extracting actual contour features and coordinates of a draft through image processing; the coordinates are mapped to a spraying vehicle coordinate system through a transformation matrix, and a rotation deviation angle and a translation deviation vector are calculated; analyzing to obtain angle and translation compensation values, packaging the angle and translation compensation values into a control instruction, and sending the control instruction to ink-jet printing control software through a real-time bus; finally, software drives a servo executing mechanism, the position and the posture of the spraying vehicle are adjusted according to a new target, and accurate alignment with the paperboard is achieved.

The embodiment of the invention provides a printing nozzle cleaning system and a printer, and relates to the technical field of printers. The printing nozzle cleaning system comprises a printing nozzle and an ink stack, wherein the printing nozzle can move to the upper side of the ink stack; the device is characterized by further comprising a first pump machine and a second pump machine, and the first pump machine and the second pump machine are respectively connected with the ink stack. Wherein the first pump machine is used for conveying ink or cleaning fluid to the ink stack, and the second pump machine is used for pumping the ink away from the ink stack. According to the printing nozzle cleaning system, the ink can generate shear force and local pressure difference in the flowing process by controlling the ink to form convection in the printing nozzle, so that cured ink and tiny impurities attached to the surface of the nozzle and the inner wall of a hole channel are weakened and stripped.

The invention relates to the technical field of power services. The self-service intelligent business card printer comprises an interaction module, a storage module and a printing module, the interaction module is in communication connection with the storage module, and the interaction module and the storage module are respectively in communication connection with the printing module; the storage module is used for storing business card data of power service personnel; the interaction module is used for acquiring a user input instruction and searching target business card data in the storage module according to the user input instruction; and the printing module is used for receiving the printing instruction of the interaction module and printing the target business card data queried in the storage module. The latest business card data of the service personnel can be provided when the user needs, repeated printing is avoided, the cost is saved, printing is convenient and fast, the intelligent level is high, and the user experience degree is improved.

The utility model discloses high-strength polymer 3D printing equipment, and belongs to the technical field of printing equipment, the high-strength polymer 3D printing equipment comprises a printer body and an aligning mechanism, two first screw rods are rotatably embedded between the inner walls of the printer body, and a movable frame is sleeved between the outer surfaces of the two first screw rods in a threaded manner; through cooperation of two first screw rods, a moving frame, a second screw rod, a limiting rod and a mounting frame, a discharging barrel can conveniently move in the transverse direction and the longitudinal direction, printing work of a printer body is facilitated, alignment plates are located on the two sides of a discharging nozzle of the discharging barrel, the two sides of a printing material can be conveniently leveled, a mounting ring rotates, the two alignment plates are conveniently driven to conduct angle adjustment, and the printing efficiency is improved. The use height of the alignment plates is conveniently adjusted through the electric telescopic rods, the mounting screws rotate on the corresponding fixing frames, then the mounting blocks are conveniently driven to move, the distance between the two alignment plates is conveniently adjusted, the alignment mechanism can conveniently meet the printing requirements of different thicknesses, and the universality of the alignment mechanism is improved.

A non-transitory computer-readable storage medium stores a supporting program executable by a computer of an information processing apparatus. The supporting program causes the computer to perform operations including: determining whether a printer connected to the apparatus supports printing on roll media in response to receiving a specified instruction from a universal printing program included in an operating system of the apparatus; in response to determining that the printer supports roll media, causing a user interface of the apparatus to display a settings screen that accepts the setting of specific parameters for printing on roll media; and in a case where, in response to a print instruction being issued, image data according to the print instruction is input from the operating system, and the parameters are set on the setting screen, causing the printer to print on roll media based on the image data and in accordance with the parameters.

The invention discloses a single-mode intelligent 3D printer control system, and relates to the technical field of 3D printing control, the single-mode intelligent 3D printer control system comprises a multi-source sensing module, an intelligent decision module and an evolution closed-loop module, the multi-source sensing module collects geometric features of a three-dimensional printing model and printing environment state data in real time; the intelligent decision-making module generates self-adaptive slicing parameters based on the data and dynamically adjusts printing process parameters; the evolutionary closed-loop module stores historical printing data and continuously optimizes parameters, the evolutionary closed-loop module, the evolutionary closed-loop module, the evolutionary closed-loop module and the evolutionary closed-loop module form a closed-loop system, and the system realizes full-process intelligent self-adaption from model analysis to printing execution, can improve the stability of printed pieces and the adaptability of the system, and is suitable for complex 3D printing tasks.

The utility model provides a visual curing following printing system, which comprises a printing mechanism, a following curing device and a driving mechanism, and is characterized in that the printing mechanism is used for printing light curing glue on the surface of a substrate; the follow-up curing device comprises a light generator, and the light generator is used for emitting curing light to cure the light curing glue liquid flowing out of the printing mechanism to the surface of the substrate; the printing mechanism comprises a printing needle head, the printing needle head is sleeved with the light generator, the light generator forms a light coverage area and a light shielding area relative to the substrate, and a plurality of observation windows are arranged in the light shielding area; the driving mechanism is used for driving the light generator to move relative to the printing needle. The printing state of the printing needle head can be observed in real time through the observation window; and when the printing needle head is blocked or hangs materials, printing is stopped, the driving mechanism is adopted to drive the light generator to move relative to the printing needle head, and the printing needle head is overhauled or cleaned.

1. The name of the design product: heat transfer printer. 2. The use of the design product: the design product is used for printing products, such as printing identification products. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The invention discloses a two-in-one switchable digital ink-jet printer, and relates to the technical field of ink-jet printers, the two-in-one switchable digital ink-jet printer comprises a flip cover, a base station is hinged to the front side of the flip cover, a paper supporting platform and a cloth supporting platform are arranged in an inner cavity of the base station, a plurality of grooves are formed in the top of the cloth supporting platform, filter cotton is arranged in the grooves, and the filter cotton is arranged in the base station. A residue collecting box is arranged on the left side of the turning cover, a switching device is arranged on the front side of the turning cover, and when the printer is used for printing cloth, the dual-purpose rotating rod, the cloth supporting platform and the corner roller are arranged in a linear mode, namely, the dual-purpose rotating rod, the cloth supporting platform and the corner roller are located on the same horizontal line, the cloth is tightened, and the cloth is prevented from wrinkling and loosening in the printing process; when the printer is used for printing paper, the dual-purpose rotating rod, the paper supporting platform and the corner roller are arranged in an arch bridge shape, namely, the dual-purpose rotating rod and the corner roller need to be slightly lower than the paper supporting platform, so that the paper is tightened and flatly sucked on the platform, and the phenomenon that the paper is in contact with an ink jet nozzle due to bumps, deviation and wrinkles in the printing process and the ink jet nozzle is blocked is avoided.

The invention relates to the technical field of 3D printing, in particular to a 3D printer nozzle motion control method, which can obtain an original printing track, and adopts a five-point Bezier curve to carry out smooth transition processing on corners between adjacent track sections; generating a speed plan of the nozzle in the smooth trajectory, wherein the speed plan comprises an acceleration stage, a uniform acceleration stage, a constant speed stage, a uniform deceleration stage and an acceleration and deceleration stage; calculating a speed plan of an E axis in direct proportion to the speed plan of the nozzle; and according to the speed plan of the spray head and the speed plan of the E axis, the 3D printer is controlled to execute 3D printing along the smooth track, and synchronous movement of the spray head and the extruder is achieved. It can be understood that according to the technical scheme shown by the invention, the corner is smoothed, the direction of the spray head cannot change suddenly, five-section speed planning is adopted, the acceleration of the spray head changes smoothly, meanwhile, the E axis and the speed of the spray head are coordinated, and the precision and efficiency of 3D printing are improved.

The invention discloses a method and device for improving printer task management efficiency and a storage medium, and relates to the technical field of printer task management.The method comprises the steps that firstly, printing task parameters and printer real-time data are obtained, and task priorities are calculated through a task priority evaluation formula; dynamically allocating hardware and software resources according to the priority, the real-time data and a rule containing a time slice allocation formula; the states of tasks and equipment are monitored in real time, and an exception handling formula and a conflict coordination formula are used for scheduling when exceptions or conflicts occur; and finally, remaining time is calculated through a printing progress formula and a time prediction algorithm and is fed back to an interactive interface, equipment comprises a data acquisition module, a priority evaluation module and the like, a data storage and model optimization module is further arranged to optimize formula parameters, and the scheme improves task management efficiency and prediction accuracy and optimizes user experience.

The invention relates to the technical field of high-power femtosecond laser manufacturing, and discloses a high-power industrial femtosecond laser water cooling structure and a manufacturing method thereof. Comprising the steps that any one of a variable cross-section spiral flow channel, a bionic fin flow channel or a micro-channel array is directly machined in a machine shell water-cooling plate through the five-axis linkage precision machining technology or the micro-nano machining technology, or the printer shell water-cooling plate is integrated through the metal additive manufacturing technology; a reflector base, a heat dissipation chute and a cooling water channel are integrated in the machining process of the water cooling plate of the machine shell; carrying out material and surface treatment process operation; assembling process operation is carried out, a reflecting mirror base is matched with a mortise and tenon joint structure and a machine shell water-cooling plate through high-precision positioning pins, the reflecting mirror base and the machine shell water-cooling plate are rigidly connected in a vacuum brazing or laser welding mode, and a light guide side plate and a runner cover plate are designed into standard modules; the light guide side plate and the runner cover plate are quickly assembled through magnetic attraction positioning and spring buckles.

A wireless communication tape, dispenser of the same and methods of usage of the wireless tape and the dispenser in asset tracking applications are disclosed. The wireless communication tape can be manufactured in an ultrathin form factor by laminating a stack of layers to impart functionality to the wireless communication tape. Methods of use and operation of the wireless communication tape are disclosed to save battery resources of the communication tape. The wireless communication tape may be used to form shipping labels that are thermally printed in a thermal printer and that include a 5G and Bluetooth communication capability to track a location of a package. Examples of 5G wireless protocols include the LPWAN protocols of NB-IoT and LTE-M.

The invention discloses a processing method and device for an edge area in film layer structure ink-jet printing, and the processing method comprises the steps: determining the edge area of a to-be-printed pattern on a substrate bitmap; the pattern to be printed comprises an edge area and a non-edge area; the edge area is divided into a plurality of edge subareas so that an ink-jet printer can conveniently conduct film layer structure printing on the edge subareas of the to-be-printed pattern; wherein in the direction from the edge area to the non-edge area, the sizes of the multiple edge subareas are sequentially decreased progressively; one size of the edge subarea corresponds to one ink drop extraction rate, the size of the edge subarea is the width of the edge subarea, and the ink drop extraction rate of the edge subarea is the proportion of ink drop points which are prohibited from printing to the total ink drop points in the edge subarea. The edge area of the film layer structure can be flat, and the film thickness is uniform.

The invention discloses an XR-based immersive three-dimensional modeling and straight-through 3D printing system and method, and the method comprises the steps: S1, collecting user input, and converting the user input into an interaction instruction; s2, generating three-dimensional model data; s3, superposing the three-dimensional model into a real physical environment according to a proportion of 1: 1, and outputting a virtual-real fusion display result; s4, performing printability analysis on the model, marking a problem area, guiding a user to modify and providing an automatic repair suggestion; s5, generating a support structure, and providing visual preview and interactive editing; s6, slicing and path planning are executed, and a printing instruction file meeting the control requirement of the 3D printer is generated; s7, communication connection with the 3D printer is established, and printing state information is fed back; and S8, providing storage and calling support of the three-dimensional model file, parameter configuration and environment map data. According to the invention, seamless integration of immersive XR modeling, MR real-time verification and one-key direct-through 3D printing is realized.

The invention belongs to the technical field of connectors, and particularly relates to a CPU connector for a printer computer, which comprises a first butt joint part arranged on a bottom plate of an upper cover; the second butt joint part is arranged on the base, and the second butt joint part is in butt joint with the first butt joint part in a matched mode, so that the upper cover and the base are accurately installed; the locking component comprises a second locking part arranged on the first butt joint part and a first locking part arranged on the base, and further comprises a guide reset assembly, one end of the guide reset assembly is connected to the base, and the other end of the guide reset assembly is connected to the first locking part; according to the invention, by arranging a matching butt joint structure of the first butt joint part and the second butt joint part and combining the first locking part, the second locking part and the guide reset assembly in the locking component, rapid and accurate installation and automatic locking of the upper cover and the base are realized, extra operation tools or complex measures do not need to be adopted, and the working efficiency is improved. The problem of time consumption caused by dependence on auxiliary tool driving in the prior art is effectively solved.

The invention belongs to the technical field of ink-jet printing, and relates to a stepping error compensation method and device for ink-jet printing and an ink-jet printer. Before printing, obtaining a target reference distance based on a camera and a preset calibration strategy; in the printing process, stepping error compensation is executed according to the distance between the camera and the target reference, including obtaining the overlapping length and the stepping distance of adjacent jet printing strips, calculating the target reference position of a target, obtaining a stepping error value, and executing hole moving or remedying operation according to the error value. According to the method, the stepping deviation of multi-PASS printing can be corrected in real time, the splicing error and the PASS channel phenomenon are reduced, the strip alignment precision and the image consistency are improved, meanwhile, the production efficiency is considered, the dependence on mechanical precision and manual intervention is reduced, and therefore the overall printing quality and stability of corrugated paper digital jet printing are improved.

The invention discloses a reversible metal 4D printing method based on hydrogel reversible deformation and a metal part, and belongs to the field of metal additive manufacturing. The method comprises the following steps: firstly, constructing a three-dimensional model comprising a hydrogel driving layer and a metal blank layer; respectively preparing hydrogel light-cured ink and metal or precursor slurry thereof; printing the two layers of materials sequentially or alternately by adopting a photocuring printer to obtain a composite green body; the hydrogel layer is dehydrated and shrunk through drying, the component is driven to generate preset shape deformation, the hydrogel layer absorbs water and expands through soaking, and reversible recovery of the shape of the component is achieved; and degreasing, selective reduction and sintering heat treatment are conducted on the component, and the compact final metal component is obtained. According to the invention, the independent hydrogel layer is used as a deformation driver, the dependence on the intrinsic phase change characteristic of a metal material is avoided, the material universality is extremely high, the method can be widely applied to 4D printing of various materials including refractory metal and high-reflection metal, and reversible control of shape change is realized.

A marking apparatus includes a marking apparatus main body including a target, a traveling mechanism for automatically traveling on a traveling surface, and a printer, and a control unit configured to control the printer and the mechanism. The control unit controls the traveling so that the mechanism automatically travels along a set traveling route, the control unit compares position coordinates of the marking apparatus main body obtained from three-dimensional position coordinates of the target during traveling input at predetermined intervals with the traveling route, and corrects traveling to eliminate a deviation from the traveling route, the control unit controls the printer so as to print the marking information set at a position corresponding to the position coordinates of the marking apparatus main body, and traveling route data setting the traveling route and marking information data defining the marking information are created based on CAD design data.

The utility model discloses a hot bed and a 3D printer, and relates to the technical field of 3D printing, the hot bed comprises a printing platform, a support frame and a locking assembly, the printing platform is provided with a printing plane used for bearing a printing piece; the supporting frame is arranged on the side, back to the printing plane, of the printing platform, the supporting frame and the printing platform are arranged at intervals in the first direction and elastically connected through an elastic piece, and the first direction is perpendicular to the printing plane; the locking assembly is arranged on the printing platform and provided with a friction face abutting against the supporting frame, the friction face is parallel to the first direction, friction force parallel to the first direction exists between the friction face and the supporting frame, and the friction force is used for limiting relative movement of the printing platform and the supporting frame in the first direction. According to the technical scheme, the connecting structure of the hot bed is simplified, and the leveling efficiency of the hot bed is improved.