CN110039767B - Control system and method for power-off reset continuous printing of fused laminated forming 3D printer - Google Patents
Control system and method for power-off reset continuous printing of fused laminated forming 3D printer Download PDFInfo
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- CN110039767B CN110039767B CN201910458630.6A CN201910458630A CN110039767B CN 110039767 B CN110039767 B CN 110039767B CN 201910458630 A CN201910458630 A CN 201910458630A CN 110039767 B CN110039767 B CN 110039767B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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Abstract
The invention discloses a control system and a method for power-off reset continuous printing of a fused laminated forming 3D printer, wherein the control system comprises a main control unit, a power supply unit, an execution unit and a storage unit; the power supply unit comprises an energy storage module; the main control unit comprises a power supply supervision module, a power-off feedback module and a main board module; the main board module can perform bidirectional data transmission with the storage unit and can control the running state of the execution unit according to the judgment result of the power-off feedback module; the mainboard module stores the position information of the current execution unit and the number of lines of the control code in the storage unit in the power-off state; and reading the position information of the execution unit and the number of lines of the control code in the storage unit when the power supply is recovered, and outputting the read data to the execution unit and the storage unit. The invention realizes the power-off resetting continuous printing of the fused laminated forming 3D printer and reduces the negative influence on the appearance of the 3D product caused by power-off accident.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a control system and method for power-off reset continuous printing of a fused laminated forming 3D printer.
Background
3D printing is a rapid prototyping technique in additive manufacturing, wherein Fused Deposition Modeling (FDM) is a 3D printing technique that deposits fluid material in a molten state layer by layer to create a three-dimensional structure. The appearance effect of the printed product produced by the technology is closely related to the thickness of the printed layer.
The smaller the printing layer thickness is, the smoother the surface of the printed product is. It is often necessary to reduce the print layer thickness in order to pursue the printing effect. However, the printing time becomes longer in inverse proportion to the decrease in the thickness of the printing layer. Therefore, under the condition that the printed product is large in size or complex in structure, the 3D printing forming time can reach dozens of hours.
The interpretation mode of the 3D printer on the control language Gcode thereof is 'compile-run'. That is, the 3D printer itself does not have a function of saving and memorizing the instruction. Once a power outage or other fault termination occurs halfway, printing is started from the beginning. This results in a large waste of printing consumables and printing time. In summer, the electricity consumption of cities represented by cities in the south of China is remarkably increased, and tripping phenomena and temporary power failure caused by unstable power supply voltage are common. Also, as the demand for production rhythm by enterprises becomes higher, the self-correction capability of all industrial-grade 3D printers in the night unattended environment is necessary.
Therefore, how to realize the power-off reset continuous operation of the fused deposition modeling 3D printer and reduce the negative impact on the appearance of the 3D product caused by unexpected power-off is a problem to be solved in the technical field of 3D printing.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a fused deposition modeling 3D printer that can realize that the outage of fused deposition modeling 3D printer resets the continuation control system that beats that resets to reduce because of the unexpected negative effect that brings to the outward appearance of 3D product of outage.
In addition, the invention also provides a control method of the control system for the fused deposition modeling 3D printer to realize the power-off reset continuous printing of the fused deposition modeling 3D printer and reduce the negative influence on the appearance of the 3D product caused by accidental power-off.
In order to solve the technical problems, the invention adopts the following technical scheme:
the control system for the power-off reset continuous printing of the fused laminated forming 3D printer comprises a main control unit, a power supply unit for supplying power to the main control unit, an execution unit for controlling the running state by the main control unit and a storage unit for recording control codes of the 3D printer;
the power supply unit comprises an energy storage module, and the energy storage module supplies power to the main control unit when the power supply unit is in a power-off state;
the main control unit comprises a power supply monitoring module, a power-off feedback module and a main board module;
the power supply monitoring module is connected with the power supply unit and used for detecting whether the power supply unit is in a normal power supply state or a power failure state and outputting a detection result to the power failure feedback module;
the power-off feedback module judges whether the working state of the 3D printer is a normal power supply state or a power-off state according to the detection result transmitted by the power supply monitoring module and outputs the judged result to the mainboard module;
the mainboard module can perform bidirectional data transmission with the storage unit and can control the running state of the execution unit according to the judgment result of the power-off feedback module; the mainboard module stores the current position information of the execution unit and the number of lines of the control code in the storage unit in the power-off state; and the mainboard module reads the position information of the execution unit and the number of lines of the control code in the storage unit, which are saved in the power-off state, when the power supply is restored, and outputs the read data to the execution unit and the storage unit.
The working principle of the invention is as follows: when the power supply is cut off, the power supply monitoring module detects that the power supply unit is in a power-off state and outputs a detection result to the power-off feedback module, and the power-off feedback module judges that the working state of the 3D printer is in the power-off state according to the detection result transmitted by the power supply monitoring module and outputs the judged result to the mainboard module; the main board module switches the energy storage module to a power-off state according to a judgment result transmitted by the power-off feedback module, the energy storage module supplies power to the main control unit, simultaneously switches the working state of the 3D printer from a normal power supply state to the power-off state, controls the execution unit to be in the power-off state and generates a work stopping instruction, records and stores the position information of the current execution unit and the number of lines of the control codes in the storage unit, and after the record and the storage are finished, the energy storage module stops supplying power to the main control unit to finish the operation during the power-off state;
when the power supply is recovered, the power supply monitoring module detects that the power supply unit is in a normal working state and outputs a detection result to the power failure feedback module; the power-off feedback module judges the working state of the 3D printer to be a normal working state according to the detection result transmitted by the power supply monitoring module and outputs the judged result to the mainboard module; the main board module switches the working state of the 3D printer from a power-off state to a normal power-on state according to a judgment result, controls the execution unit to switch to the normal power-on state, reads the stored position information of the current execution unit and the number of lines of the control codes in the storage unit during power-off, outputs the read data to the execution unit and the storage unit, and resets the control codes in the execution unit and the storage unit to the power-off state according to the recorded data and then continues printing.
The invention has the beneficial effects that: the power supply monitoring module detects a power-off signal, the power-off feedback module judges the working state of the 3D printer according to the signal, the mainboard module executes different controls according to the judged working state of the 3D printer, when the power is off, the mainboard module controls the execution unit to stop working and records and stores the running state of the current execution unit and the number of lines of the control codes in the storage unit, when the power is restored, the mainboard module reads the stored data when the power is off, resets the execution unit according to the data, and continues printing from the stored control codes, so that when the power is restored, the 3D printer can automatically restore to the working state when the power is off, the power-off restoration continuous printing of the fused laminated forming 3D printer is realized, and the negative influence on the appearance of the 3D product caused by unexpected power failure is reduced.
Preferably, the power supply unit includes an ac power supply and a transformer for converting ac power output by the ac power supply into low-voltage dc power, an electric energy input end of the transformer is connected to the ac power supply, an electric energy output end of the transformer is connected to the main control unit, the transformer supplies power to the main control unit when the ac power supply is in a normal power supply state, and the energy storage module acquires and stores electric energy from the transformer when the ac power supply is in a normal power supply state.
Therefore, alternating current generated by an alternating current power supply in the power supply unit is converted into low-voltage direct current through a transformer, and the main control unit is powered by the low-voltage direct current; meanwhile, the energy storage module also acquires and stores electric energy from the transformer, so that when the alternating current power supply is normally powered on, the energy storage module stores the electric energy, and when the alternating current power supply is powered off, the stored electric energy is output to the main control unit by the energy storage module and is used for supplying power to the main control unit.
Preferably, the main control unit further comprises an LCD screen module for displaying the working state of the 3D printer and inputting user instructions, and the LCD screen module is connected to the main board module and the storage unit, and transmits the control codes in the storage unit and the input user instructions to the main board module.
Like this, through setting up LCD screen module, the user can see the behavior of 3D printer through LCD screen module is audio-visual on the one hand, and on the other hand user can also input the instruction for 3D printer carries out work according to user's requirement, and LCD screen module still is used for the connection between mainboard module and the memory cell simultaneously, and the control code in the memory cell passes through LCD screen module and transmits for mainboard module, makes mainboard module carry out work according to control code's requirement.
Preferably, the execution unit comprises a heating system and a mechanical transmission system; the heating system comprises a melt extrusion nozzle and a hot bed, the melt extrusion nozzle is used for heating a printing material to form a fluid in a molten state and extruding the fluid, and the hot bed is used for adsorbing a printing product;
mechanical transmission system includes slip table and running gear in the rectangle plane that mutually perpendicular's X axle and Y axle formed, still is equipped with Z axle motion in the rectangle plane department that perpendicular to X axle and Y axle formed, the shower nozzle is fixed in the melting is extruded the running gear is last and can be in move along X axle and Y axle under the control of mainboard module, the heat bed or the slip table with Z axle motion is connected and can be followed Z axle and removed.
Preferably, a first limit switch, a second limit switch and a third limit switch are respectively and correspondingly arranged at the original points of the X axis, the Y axis and the Z axis of the mechanical transmission system, and the first limit switch, the second limit switch and the third limit switch are mechanical limit switches, photoelectric limit switches or inductive limit switches.
In this way, a first limit switch, a second limit switch and a third limit switch are respectively and correspondingly arranged at the original points of the X axis, the Y axis and the Z axis; when the power failure occurs, the position of the melt extrusion nozzle may have changed, so that the melt extrusion nozzle is not in a rectangular plane formed by the X axis and the Y axis when the power failure occurs; when power supply is recovered, the positions of the X axis, the Y axis and the Z axis are corrected by utilizing the limit switches, so that the original point position of each axis is respectively matched with the position of each limit switch, the position of each axis is returned to the position before power failure, and the position of the melting extrusion nozzle on the rectangular plane formed by the X axis and the Y axis is adjusted, so that the accuracy of the position of the melting extrusion nozzle after power supply is recovered is ensured, and the negative influence on the appearance of a 3D product caused by power failure is further reduced.
By adopting the control method of the power-off resetting continuous printing control system of the fused deposition modeling 3D printer, when the power-off feedback module judges that the working state of the 3D printer is the power-off state and outputs the judged result to the mainboard module, the mainboard module executes the following operations:
step 1.1) switching the energy storage module to a power-off working state, and supplying power to the main control unit by the energy storage module;
step 1.2) switching the working state of the 3D printer from a normal power supply state to a power off state;
step 1.3) controlling an execution unit to switch to a power-off state and sending a work stopping instruction to the execution unit;
step 1.4) recording and saving the position information of the execution unit of the current 3D printer and the number of lines of the control code in the storage unit;
and step 1.5) the energy storage module stops supplying power to the main control unit.
Like this, when the outage takes place, the operating condition that outage feedback module judged the 3D printer is the outage state and exports the result of judgement for the mainboard module, the mainboard module switches energy storage module into outage operating condition earlier for energy storage module is as the power supply of temporary power source for the main control unit, then mainboard module again respectively with 3D printer and execution unit's operating condition also switch the outage state, the position information of the execution unit and the code that is carrying out at the moment of noting the outage again, provide the reference basis for subsequent resume power supply.
Preferably, after the power supply unit recovers power supply, the power failure feedback module determines that the working state of the 3D printer is a normal power supply state and outputs a determination result to the motherboard module, and the motherboard module executes the following operations:
step 2.1) switching the working state of the 3D printer from a power-off state to a normal power supply state;
step 2.2) controlling the execution unit to be switched from a power-off state to a normal power supply state;
step 2.3) reading the position information of the execution unit recorded and saved in the step 1.4) and the number of lines of the control code in the storage unit;
step 2.4) outputting the position information of the execution unit read in the step 2.3) to the execution unit and enabling the execution unit to reset to the position, and simultaneously outputting the number of lines of the control code being executed in the read storage unit to the storage unit and enabling the 3D printer to execute from the control code at the position;
step 2.5) begins to continue printing.
Therefore, after power supply is recovered, the mainboard module reads the saved data when the power is off, resets the execution unit according to the data, and continues printing from the saved control code, so that when the power is recovered, the 3D printer can automatically recover to the working state when the power is off, the power-off reset continuous printing of the fused laminated forming 3D printer is realized, and the negative influence on the appearance of the 3D product due to power failure is reduced.
Preferably, the main control unit further comprises an LCD screen module for displaying the working state of the 3D printer and inputting a user instruction, the LCD screen module is connected to the main board module and the storage unit, and transmits the control code in the storage unit and the input user instruction to the main board module;
after the power supply unit recovers power supply, a user can set the 3D printer to be in a standby state or automatically reset for continuous printing;
when a user sets the 3D printer to be in a standby state, the main board module drives the LCD screen module to display the standby state and inquire whether to continue printing, when the user selects not to continue printing, the execution unit is recovered to the initial position, and when the user selects to continue printing, the step 2.1) to the step 2.5) are executed;
and when the user sets the 3D printer to be automatically reset and continuously printing, executing the step 2.1) to the step 2.5).
Therefore, the user can set the 3D printer to be in a standby state or automatically reset to continue printing according to needs when power supply is recovered, and therefore personalized requirements of the user can be better met.
The execution unit comprises a heating system and a mechanical transmission system; the heating system comprises a melt extrusion nozzle and a hot bed, the melt extrusion nozzle is used for heating a printing material to form a fluid in a molten state and extruding the fluid, and the hot bed is used for adsorbing a printing product;
the mechanical transmission system comprises a sliding table and a traveling mechanism which are arranged in a rectangular plane formed by an X axis and a Y axis which are perpendicular to each other, a Z-axis movement mechanism is further arranged at the rectangular plane formed by the X axis and the Y axis which is perpendicular to each other, the melting extrusion nozzle is fixed on the traveling mechanism and can move along the X axis and the Y axis under the control of the main board module, and the heating bed or the sliding table is connected with the Z-axis movement mechanism and can move along the Z axis;
before the step 2.5) is executed and the printing is continued, the main board module controls the hot bed or the sliding table to move upwards along the Z axis so that the melting extrusion nozzle is positioned 1-3mm above the printed product, then the melting extrusion nozzle is heated to 195-fold temperature 220 ℃, and the hot bed or the sliding table is reset downwards along the Z axis after the melting extrusion nozzle is suspended for 0.5-10 s.
Therefore, before power supply is recovered and printing is continued, the melting extrusion nozzle is arranged at the position 1-3mm above a printed product and is suspended for 0.5-10s after being heated to the rated temperature, so that the printing material around the melting extrusion nozzle can be melted and then is continuously printed, the printed product has certain continuity and isotropy in appearance, the defects that gaps and printing material silk sticking offset and the like affect the appearance of a 3D product are avoided, and different printing materials need different suspension seconds.
A first limit switch, a second limit switch and a third limit switch are respectively and correspondingly arranged at the original points of an X axis, a Y axis and a Z axis of the mechanical transmission system, and the first limit switch, the second limit switch and the third limit switch are mechanical limit switches or photoelectric limit switches or inductive limit switches;
in step 2.4), the first limit switch and the second limit switch are used for carrying out zero resetting correction on the X axis and the Y axis respectively, so that the rectangular plane formed by the X axis and the Y axis returns to the position of the power failure.
Like this, when resumeing the power supply, utilize each limit switch to rectify X axle and Y axle's position this moment for the initial point position of each axle respectively with each limit switch's position phase-match this moment, thereby make the position of each axle get back to the position before the outage, readjust the melting and extrude the position of shower nozzle on the rectangle plane that X axle and Y axle formed, thereby guaranteed the accuracy of melting extrusion shower nozzle position after resumeing the power supply, further reduced because of the unexpected negative effect to 3D product outward appearance of outage.
Drawings
For purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made in detail to the present invention as illustrated in the accompanying drawings, in which:
FIG. 1 is a schematic block diagram of a power-off reset continuous-printing control system of a fused deposition modeling 3D printer according to an embodiment of the present invention;
FIG. 2 is a flowchart of the interrupt control of an embodiment of the present invention;
FIG. 3 is a flow chart of reset control in an embodiment of the present invention;
FIG. 4 is a graph of different material print thickness versus hover time in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the control system for power-off reset continuous printing of the fused deposition modeling 3D printer includes a main control unit, a power supply unit for supplying power to the main control unit, an execution unit for controlling the operation state by the main control unit, and a storage unit for recording control codes of the 3D printer;
the power supply unit comprises an energy storage module, and the energy storage module supplies power to the main control unit when the power supply unit is in a power-off state;
the main control unit comprises a power supply supervision module, a power-off feedback module and a main board module;
the power supply monitoring module is connected with the power supply unit and used for detecting whether the power supply unit is in a normal power supply state or a power failure state and outputting a detection result to the power failure feedback module;
the power-off feedback module judges whether the working state of the 3D printer is a normal power supply state or a power-off state according to the detection result transmitted by the power supply monitoring module and outputs the judged result to the mainboard module;
the main board module can perform bidirectional data transmission with the storage unit and can control the running state of the execution unit according to the judgment result of the power-off feedback module; the mainboard module stores the position information of the current execution unit and the number of lines of the control code in the storage unit in the power-off state; and the main board module reads the position information of the execution unit and the number of lines of the control code in the storage unit, which are saved in the power-off state, when the power supply is restored, and outputs the read data to the execution unit and the storage unit.
The working principle of the invention is as follows: when the power supply is cut off, the power supply monitoring module detects that the power supply unit is in a power-off state and outputs a detection result to the power-off feedback module, and the power-off feedback module judges that the working state of the 3D printer is in the power-off state according to the detection result transmitted by the power supply monitoring module and outputs the judged result to the mainboard module; the main board module switches the energy storage module to a power-off state according to a judgment result transmitted by the power-off feedback module, the energy storage module supplies power to the main control unit, simultaneously switches the working state of the 3D printer from a normal power supply state to the power-off state, controls the execution unit to be in the power-off state and generates a work stopping instruction, records and stores the position information of the current execution unit and the number of lines of the control codes in the storage unit, and after the record and the storage are finished, the energy storage module stops supplying power to the main control unit to finish the operation during the power-off state;
when the power supply is recovered, the power supply monitoring module detects that the power supply unit is in a normal working state and outputs a detection result to the power failure feedback module; the power-off feedback module judges the working state of the 3D printer to be a normal working state according to the detection result transmitted by the power supply monitoring module and outputs the judged result to the mainboard module; the main board module switches the working state of the 3D printer from a power-off state to a normal power-on state according to a judgment result, controls the execution unit to switch to the normal power-on state, reads the stored position information of the current execution unit and the number of lines of the control codes in the storage unit during power-off, outputs the read data to the execution unit and the storage unit, and resets the control codes in the execution unit and the storage unit to the power-off state according to the recorded data and then continues printing.
The invention has the beneficial effects that: the power supply monitoring module detects a power-off signal, the power-off feedback module judges the working state of the 3D printer according to the signal, the mainboard module executes different controls according to the judged working state of the 3D printer, when the power is off, the mainboard module controls the execution unit to stop working and records and stores the running state of the current execution unit and the number of lines of the control codes in the storage unit, when the power is restored, the mainboard module reads the stored data when the power is off, resets the execution unit according to the data, and continues printing from the stored control codes, so that when the power is restored, the 3D printer can automatically restore to the working state when the power is off, the power-off restoration continuous printing of the fused laminated forming 3D printer is realized, and the negative influence on the appearance of the 3D product caused by unexpected power failure is reduced.
In this embodiment, the power supply unit includes an ac power supply and a transformer for converting ac power output by the ac power supply into low-voltage dc power, an electric energy input end of the transformer is connected to the ac power supply, an electric energy output end of the transformer is connected to the main control unit, the transformer supplies power to the main control unit when the ac power supply is in a normal power supply state, and the energy storage module acquires and stores electric energy from the transformer when the ac power supply is in a normal power supply state; the AC power supply in this embodiment is 220V/110V AC power supply.
Therefore, alternating current generated by an alternating current power supply in the power supply unit is converted into low-voltage direct current through a transformer, and the main control unit is powered by the low-voltage direct current; meanwhile, the energy storage module also acquires and stores electric energy from the transformer, so that when the alternating current power supply is normally powered on, the energy storage module stores the electric energy, and when the alternating current power supply is powered off, the stored electric energy is output to the main control unit by the energy storage module and is used for supplying power to the main control unit.
In this embodiment, the main control unit further includes an LCD screen module for displaying a working state of the 3D printer and inputting a user instruction, the LCD screen module is connected to the main board module and the storage unit, respectively, and transmits a control code in the storage unit and the input user instruction to the main board module; in the embodiment, the storage unit is an SD card; the LCD screen module is provided with an SD card slot for connecting the SD card, and also comprises a button, a knob or other accessories which can enable a user to complete the functions of selecting, confirming and canceling, so that the user can set the 3D printer to automatically return to the working state to continue printing or keep the standby state after the power supply is restored, and the user can judge whether to continue printing or not.
Like this, through setting up LCD screen module, the user can see the behavior of 3D printer through LCD screen module is audio-visual on the one hand, and on the other hand user can also input the instruction for 3D printer carries out work according to user's requirement, and LCD screen module still is used for the connection between mainboard module and the memory cell simultaneously, and the control code in the memory cell passes through LCD screen module and transmits for mainboard module, makes mainboard module carry out work according to control code's requirement.
In the embodiment, the execution unit comprises a heating system and a mechanical transmission system; the heating system comprises a melt extrusion nozzle and a hot bed, the melt extrusion nozzle is used for heating the printing material to form a fluid in a molten state and extruding the fluid, and the hot bed is used for adsorbing the printing product;
the mechanical transmission system comprises a sliding table and a traveling mechanism which are arranged in a rectangular plane formed by an X axis and a Y axis which are perpendicular to each other, a Z axis movement mechanism is further arranged at the rectangular plane formed by the X axis and the Y axis which is perpendicular to each other, the melting extrusion nozzle is fixed on the traveling mechanism and can move along the X axis and the Y axis under the control of the main board module, and the heating bed or the sliding table is connected with the Z axis movement mechanism and can move along the Z axis.
In this embodiment, a first limit switch, a second limit switch and a third limit switch are respectively and correspondingly arranged at the original points of the X axis, the Y axis and the Z axis of the mechanical transmission system, and the first limit switch, the second limit switch and the third limit switch are mechanical limit switches, photoelectric limit switches or inductive limit switches.
In this way, a first limit switch, a second limit switch and a third limit switch are respectively and correspondingly arranged at the original points of the X axis, the Y axis and the Z axis; when the power failure occurs, the position of the melt extrusion nozzle may have changed, so that the melt extrusion nozzle is not in a rectangular plane formed by the X axis and the Y axis when the power failure occurs; when power supply is recovered, the positions of the X axis, the Y axis and the Z axis are corrected by utilizing the limit switches, so that the original point position of each axis is respectively matched with the position of each limit switch, the position of each axis is returned to the position before power failure, and the position of the melting extrusion nozzle on the rectangular plane formed by the X axis and the Y axis is adjusted, so that the accuracy of the position of the melting extrusion nozzle after power supply is recovered is ensured, and the negative influence on the appearance of a 3D product caused by power failure is further reduced.
In this embodiment, the main board module includes a servo motor and a motor driver embedded in the main board module, and the servo motor is connected to the melt extrusion nozzle.
Like this, through at the embedded servo motor of mainboard module to utilize servo motor control melting to extrude the removal of shower nozzle, can detect the melting more accurately when the outage and extrude the displacement data that the shower nozzle was followed X axle and Y axle respectively, and will detect the displacement data send to the mainboard module, thereby make more accurate that resets when resumeing the power supply, further reduce the unexpected influence to 3D printing product outward appearance of outage.
In this embodiment, the power supply supervision module includes a power supply switch and a power supply plug, and the power supply switch is used for manually switching on or off the 3D printer; the power plug is used for connecting an alternating current power supply.
Like this, when under alternating current power supply normal condition, when the user need suspend to print, can pass through the manual 3D printer that cuts off of switch, when needs resume printing, also can pass through the manual 3D printer that switches on of switch to better satisfy user's demand.
In this embodiment, the energy storage module is a storage battery or a capacitor.
Like this, acquire the electric energy from the transformer when energy storage module is in alternating current power supply normal power supply state and charge battery or electric capacity, battery or electric capacity are saved the electric energy, and when alternating current power supply outage, battery or electric capacity can outwards discharge, and then realize the interim power supply to the main control unit.
In this embodiment, the power supply unit further includes a fuse, and the fuse is connected between the ac power source and the energy storage module.
In this way, the fuse can play a protective role to prevent the damage of the transformer and the main control unit caused by the overlarge voltage of the external alternating current power supply.
In this embodiment, the execution unit further includes a fan, and the fan is used for dissipating heat of the 3D printer.
As shown in fig. 2 and fig. 3, with the control method of the control system for power-off reset continuous printing of the fused deposition modeling 3D printer, when the power-off feedback module determines that the working state of the 3D printer is the power-off state and outputs the determination result to the motherboard module, the motherboard module executes the following operations:
step 1.1) switching the energy storage module to a power-off working state, and supplying power to the main control unit by the energy storage module;
step 1.2) switching the working state of the 3D printer from a normal power supply state to a power off state;
step 1.3) controlling the execution unit to switch to a power-off state and sending a work stopping instruction to the execution unit;
step 1.4) recording and saving the position information of the current 3D printer execution unit and the number of lines of the control code in the storage unit;
and step 1.5) stopping the energy storage module from supplying power to the main control unit.
Like this, when the outage takes place, the operating condition that outage feedback module judged the 3D printer is the outage state and exports the result of judgement for the mainboard module, the mainboard module switches energy storage module into outage operating condition earlier for energy storage module is as the power supply of temporary power source for the main control unit, then mainboard module again respectively with 3D printer and execution unit's operating condition also switch the outage state, the position information of the execution unit and the code that is carrying out at the moment of noting the outage again, provide the reference basis for subsequent resume power supply.
In this embodiment, after the power supply unit resumes supplying power, the power-off feedback module determines that the working state of the 3D printer is the normal power supply state and outputs the determined result to the motherboard module, and the motherboard module will execute the following operations:
step 2.1) switching the working state of the 3D printer from a power-off state to a normal power supply state;
step 2.2) controlling the execution unit to be switched from a power-off state to a normal power supply state;
step 2.3) reading the position information of the execution unit recorded and saved in the step 1.4) and the number of lines of the control code in the storage unit;
step 2.4) outputting the position information of the execution unit read in the step 2.3) to the execution unit and enabling the execution unit to reset to the position, and simultaneously outputting the number of lines of the read storage unit where the control code is executing to the storage unit and enabling the 3D printer to execute from the control code at the position;
step 2.5) begins to continue printing.
Therefore, after power supply is recovered, the mainboard module reads the saved data when the power is off, resets the execution unit according to the data, and continues printing from the saved control code, so that when the power is recovered, the 3D printer can automatically recover to the working state when the power is off, the power-off reset continuous printing of the fused laminated forming 3D printer is realized, and the negative influence on the appearance of the 3D product due to power failure is reduced.
In this embodiment, after the power supply unit resumes supplying power, the user may set the 3D printer to remain in a standby state or automatically reset to continue printing;
when the user sets the 3D printer to be in a standby state, the main board module drives the LCD screen module to display the standby state and inquire whether to continue printing, when the user selects not to continue printing, the execution unit returns to the initial position, and when the user selects to continue printing, the step 2.1) to the step 2.5) are executed;
and when the user sets the 3D printer to be automatically reset and continuously printing, executing the step 2.1) to the step 2.5).
Therefore, the user can set the 3D printer to be in a standby state or automatically reset to continue printing according to needs when power supply is recovered, and therefore personalized requirements of the user can be better met.
In this embodiment, before the step 2.5) is executed and printing is continued, the main board module controls the heat bed or the sliding table to move upwards along the Z axis, so that the melt extrusion nozzle is located 1-3mm above the printed product, then the melt extrusion nozzle is heated to 195-.
Thus, before power supply is restored and printing is continued, the melting extrusion nozzle is arranged at the position 1-3mm above a printed product, and is heated to the rated temperature and then suspended for 0.5-10s, so that the printing material around the melting extrusion nozzle can be melted and then continuously printed, the printed product has certain continuity and isotropy in appearance, the defects that gaps, printing material silk sticking deviation and the like influence the appearance of a 3D product are avoided, and the suspension seconds required by different printing materials are different; the different thicknesses of the different materials versus the hover time are shown in figure 4.
In this embodiment, in step 2.4), the X-axis and the Y-axis are subjected to the zeroing correction by the first limit switch and the second limit switch, respectively, so that the rectangular plane formed by the X-axis and the Y-axis returns to the position at the time of power failure.
Like this, when resumeing the power supply, utilize each limit switch to rectify X axle and Y axle's position this moment for the initial point position of each axle respectively with each limit switch's position phase-match this moment, thereby make the position of each axle get back to the position before the outage, readjust the melting and extrude the position of shower nozzle on the rectangle plane that X axle and Y axle formed, thereby guaranteed the accuracy of melting extrusion shower nozzle position after resumeing the power supply, further reduced because of the unexpected negative effect to 3D product outward appearance of outage.
When the power-off state is detected, the main board module executes the control codes as follows:
m112, emergency stop;
m25, pausing the 3D printing by taking the SD card as a control code storage tool;
m84, interrupting power supply of all motors;
m82, interrupting the power supply of the heating system;
and M107, interrupting the power supply of the fan.
When the normal power supply state is recovered, the main board module executes the control codes as follows:
G1Z 2, quickly improving the Z-axis motion mechanism by 2 mm;
m666, the code is not the code of the standard Gcode, the inventor defines and creats by oneself, have and carry out the user to the printer automatically to return to the function that the working condition continues printing immediately, or keep the function that the judgement of the standby state is set up directly;
if the user sets "automatically return to the working state immediately and continue printing", then:
{ M420S 0Z 0, 3D printer thermal bed auto leveling (if provided);
m116, starting heating to the rated temperature;
m106, operating a fan;
G28 X1 Y1；
m114, acquiring the current positioning;
G0Z-2, 2 mm of Z-axis movement mechanism descending at working speed;
G4P 1000 x, hovering x seconds, requires multiplying x by 1000 because the code is in milliseconds;
m24, start/resume 3D printing; }
If the user sets the state to be kept in standby, executing the following steps:
{ M25, pausing 3D printing with the SD card as a control code Gcode storage tool; }.
Finally, it is noted that the above examples are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (3)
1. The method is characterized in that a control system for power-off reset continuous printing of the fused deposition modeling 3D printer is adopted, and the control system comprises a main control unit, a power supply unit for supplying power to the main control unit, an execution unit for controlling the running state by the main control unit and a storage unit for recording control codes of the 3D printer;
the power supply unit comprises an energy storage module, and the energy storage module supplies power to the main control unit when the power supply unit is in a power-off state;
the main control unit comprises a power supply monitoring module, a power-off feedback module and a main board module;
the power supply monitoring module is connected with the power supply unit and used for detecting whether the power supply unit is in a normal power supply state or a power failure state and outputting a detection result to the power failure feedback module;
the power-off feedback module judges whether the working state of the 3D printer is a normal power supply state or a power-off state according to the detection result transmitted by the power supply monitoring module and outputs the judged result to the mainboard module;
the mainboard module can perform bidirectional data transmission with the storage unit and can control the running state of the execution unit according to the judgment result of the power-off feedback module; the mainboard module stores the current position information of the execution unit and the number of lines of the control code in the storage unit in the power-off state; when the power supply is restored, the mainboard module reads the position information of the execution unit and the number of lines of the control code in the storage unit, which are saved in the power-off state, and outputs the read data to the execution unit and the storage unit;
the execution unit comprises a heating system and a mechanical transmission system; the heating system comprises a melt extrusion nozzle and a hot bed, the melt extrusion nozzle is used for heating a printing material to form a fluid in a molten state and extruding the fluid, and the hot bed is used for adsorbing a printing product;
the mechanical transmission system comprises a sliding table and a traveling mechanism which are arranged in a rectangular plane formed by an X axis and a Y axis which are perpendicular to each other, a Z-axis movement mechanism is further arranged at the rectangular plane formed by the X axis and the Y axis which is perpendicular to each other, the melting extrusion nozzle is fixed on the traveling mechanism and can move along the X axis and the Y axis under the control of the main board module, and the heating bed or the sliding table is connected with the Z-axis movement mechanism and can move along the Z axis;
a first limit switch, a second limit switch and a third limit switch are respectively and correspondingly arranged at the original points of an X axis, a Y axis and a Z axis of the mechanical transmission system, and the first limit switch, the second limit switch and the third limit switch are mechanical limit switches or photoelectric limit switches or inductive limit switches;
the power supply unit comprises an alternating current power supply and a transformer for converting alternating current output by the alternating current power supply into low-voltage direct current, the electric energy input end of the transformer is connected with the alternating current power supply, the electric energy output end of the transformer is connected with the main control unit, the transformer supplies power to the main control unit when the alternating current power supply is in a normal power supply state, and the energy storage module acquires and stores electric energy from the transformer when the alternating current power supply is in a normal power supply state;
when the power-off feedback module judges that the working state of the 3D printer is the power-off state and outputs the judged result to the mainboard module, the mainboard module executes the following operations:
step 1.1) switching the energy storage module to a power-off working state, and supplying power to the main control unit by the energy storage module;
step 1.2) switching the working state of the 3D printer from a normal power supply state to a power off state;
step 1.3) controlling an execution unit to switch to a power-off state and sending a work stopping instruction to the execution unit;
step 1.4) recording and saving the position information of the execution unit of the current 3D printer and the number of lines of the control code in the storage unit;
step 1.5) the energy storage module stops supplying power to the main control unit;
after the power supply unit recovers power supply, the power failure feedback module judges that the working state of the 3D printer is a normal power supply state and outputs a judgment result to the mainboard module, and the mainboard module executes the following operations:
step 2.1) switching the working state of the 3D printer from a power-off state to a normal power supply state;
step 2.2) controlling the execution unit to be switched from a power-off state to a normal power supply state;
step 2.3) reading the position information of the execution unit recorded and saved in the step 1.4) and the number of lines of the control code in the storage unit;
step 2.4) outputting the position information of the execution unit read in the step 2.3) to the execution unit and enabling the execution unit to reset to the position, and simultaneously outputting the number of lines of the control code being executed in the read storage unit to the storage unit and enabling the 3D printer to execute from the control code at the position;
step 2.5) starting to continue printing;
before continuing printing in the step 2.5), the main board module controls the hot bed or the sliding table to move upwards along the Z axis so that the melting extrusion nozzle is positioned 1-3mm above a printed product, then the melting extrusion nozzle is heated to 195-fold temperature 220 ℃, and the hot bed or the sliding table is suspended for 0.5-10s and then is reset downwards along the Z axis;
in step 2.4), the first limit switch and the second limit switch are used for carrying out zero resetting correction on the X axis and the Y axis respectively, so that the rectangular plane formed by the X axis and the Y axis returns to the position of the power failure.
2. The method for controlling power-off reset continuous printing of a fused deposition modeling 3D printer according to claim 1, wherein the main control unit further comprises an LCD screen module for displaying the working state of the 3D printer and inputting user instructions, the LCD screen module is respectively connected with the main board module and the storage unit, and transmits the control codes in the storage unit and the input user instructions to the main board module.
3. The method for controlling power-off reset continuous printing of a fused deposition modeling 3D printer according to claim 2, wherein after the power supply unit returns to power supply, a user can set the 3D printer to be in a standby state or automatically reset continuous printing;
when a user sets the 3D printer to be in a standby state, the main board module drives the LCD screen module to display the standby state and inquire whether to continue printing, when the user selects not to continue printing, the execution unit is recovered to the initial position, and when the user selects to continue printing, the step 2.1) to the step 2.5) are executed;
and when the user sets the 3D printer to be automatically reset and continuously printing, executing the step 2.1) to the step 2.5).
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