CN111331846A - Leveling control system and leveling method for 3D printer - Google Patents
Leveling control system and leveling method for 3D printer Download PDFInfo
- Publication number
- CN111331846A CN111331846A CN202010214170.5A CN202010214170A CN111331846A CN 111331846 A CN111331846 A CN 111331846A CN 202010214170 A CN202010214170 A CN 202010214170A CN 111331846 A CN111331846 A CN 111331846A
- Authority
- CN
- China
- Prior art keywords
- collision
- network interface
- dir
- control
- printer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/245—Platforms or substrates
-
- 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
-
- 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
Abstract
The invention discloses a leveling control system and a leveling method for a 3D printer, wherein the leveling control system comprises a control main board; motor drive control output module, collision switch sensor, collision signal processing module, mainboard control signal input feedback module, collision signal processing module acquires the collision signal from collision switch sensor to with the collision signal who acquires after handling, feed back mainboard control signal input feedback module, mainboard control signal input feedback module basis the collision signal that collision signal processing module provided sends the actuating signal to corresponding motor drive control output module, corresponding motor drive control output module sends the actuating signal to installing the corresponding motor on the frame stand of 3D printer. The invention can automatically level the printing platform, has quick response of leveling signals, improves the printing precision of the machine and the molding effect of the model, does not need manual intervention in the process and has simple operation.
Description
Technical Field
The invention relates to a 3D printer technology, in particular to a leveling control system and a leveling method for a 3D printer.
Background
3D printing (3DP), a technique for constructing objects by layer-by-layer printing using bondable materials such as powdered metals or plastics based on digital model files, is one of the rapid prototyping techniques, also known as additive manufacturing. 3D printing is typically achieved using digital technology material printers. The method is often used for manufacturing models in the fields of mold manufacturing, industrial design and the like, and is gradually used for directly manufacturing some products, and parts printed by the technology are already available. The technology has applications in jewelry, footwear, industrial design, construction, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields. There are many different techniques for 3D printing. They differ in the way the building components are built up in different layers, in the way the materials are available. Common materials for 3D printing include nylon glass fiber, durable nylon materials, gypsum materials, aluminum materials, titanium alloys, stainless steel, silver plating, gold plating and rubber materials.
The 3D printer of Corexy structure, the advantage is that space utilization is high, and the motion is steady, can print by higher speed. But one core that the 3D printer of Corexy structure can not obtain best work effect lies in initial leveling, whether printing platform profiled surface is parallel with the plane of motion of extruding the head promptly, and apart from a suitable distance, if two plane nonparallels will lead to extruding the head to the platform each point distance inconsistent, the too big then ejection of compact can't adhere to on the platform, the distance undersize then ejection of compact difficulty, first layer is printed inhomogeneously, lead to the model to stick up the limit at last, the model drops scheduling problem makes printing failure, printing failure rate is high. At present, part of models have an automatic leveling function, software leveling is used for leveling, a printing platform is positioned by utilizing a microswitch, then the distance compensation is carried out on a Z axis in the printing process, but the precision problem is limited.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a leveling control system and a leveling method for a 3D printer.
The technical scheme adopted by the invention for solving the technical problems is as follows: A3D printer leveling control system, comprising: a control main board; the motor drive control output module is integrated in the control main board and is connected with a corresponding connecting serial port in the control main board; the collision switch sensor is arranged on a frame upright post of the 3D printer and used for acquiring a collision signal of a printing platform of the 3D printer and outputting the collision signal of the printing platform; the collision signal processing module is integrated in the control mainboard and is connected with a corresponding connecting serial port in the control mainboard; the main board control signal input feedback module is integrated in the control main board and is used for receiving motor driving signals fed back by the collision signal processing module and the motor driving signals fed back by the motor driving control output module;
the collision signal processing module acquires a collision signal from the collision switch sensor, processes the acquired collision signal and feeds the processed collision signal back to the main board control signal input feedback module, the main board control signal input feedback module sends an action signal to the corresponding motor drive control output module according to the collision signal provided by the collision signal processing module, and the corresponding motor drive control output module sends an action signal to a corresponding motor installed on a frame upright post of the 3D printer.
Optionally, the motherboard control signal input feedback module includes a motherboard motor Drive interface Drive _ Z and a collision feedback interface PZKG;
in the mainboard motor driving interface Drive _ Z, interfaces with interface numbers of 1, 2, 7 and 8 are sequentially connected with network interfaces GND, V5.0, GND and V12 of the control mainboard, and interfaces with interface numbers of 9, 10, 11, 12, 13, 14, 15 and 16 are sequentially connected with network interfaces EN, m1, m2, m3, Rest, Sleep, Step and Dir of the control mainboard;
in the collision feedback interface PZKG, the interfaces with the interface numbers 1, 2 and 3 are sequentially connected with the network interface P of the control mainboard,
GND is connected.
Optionally, the number of the motor drive control output modules is four, and the motor drive control output modules respectively adopt DRV8825 control chips, the four motor drive control output modules respectively include stepping motor interfaces M1, M2, M3, M4, and a direction selection jumper switch J1, pins of the four motor drive control output modules, which are numbered as 1, 2, 7, 8, 9, 10, 11, 12, 13, 14, 16, are respectively and sequentially connected with network interfaces GND, V5.0, GND, V12, EN, M1, M2, M3, Rest, Sleep, Dir _ M of the control motherboard;
the four pins with the pin number of 15 of the motor drive control output module are sequentially connected with the network interfaces Step1, Step2, Step3 and Step4 of the control mainboard;
the pins with the pin numbers of 3, 4, 5 and 6 of the four motor drive control output modules are sequentially connected with the corresponding pins 1B, 1A, 2B and 2A in the stepping motor interfaces M1, M2, M3 and M4.
Optionally, in the network interface of the control motherboard, the network interface Dir _ M is connected to the network interface Dir through the direction selection jumper switch J1, and the network interface Dir _ M is further connected to the network interface of the control motherboard through a resistor R9
Connecting;
in the motor drive control output module, when the network interface Dir is at a high level, the motor rotates forwards, and the motor pushes the printing platform to reduce the distance between the printing platform and the spray head; when the network interface Dir is at a low level, the motor rotates reversely, and the motor pushes the printing platform to increase the distance between the printing platform and the spray head;
network interface
Is the inverted logic level of Dir.
Optionally, the collision signal processing module includes four collision signal input interfaces P1, P2, P3, P4, and two collision signal level conversion modules LM1, LM2, where the two collision signal level conversion modules LM1 and LM2 respectively adopt an LM358 chip; the interfaces P1, P2, P3 and P4 output logic high level to represent that collision occurs, and output logic low level to represent that collision does not occur;
the four pins with the pin number of 1 of the collision signal input interfaces P1, P2, P3 and P4 are respectively connected with a network interface V5.0 of the control mainboard, the pins with the pin number of 3 of the four collision signal input interfaces P1, P2, P3 and P4 are respectively connected with a network interface GND of the control mainboard, and the pins with the pin number of 2 of the four collision signal input interfaces P1, P2, P3 and P4 are sequentially connected with the network interfaces BP1, BP2, BP3 and BP4 of the control mainboard;
pins with the pin numbers of 4 and 8 of the collision signal level conversion modules LM1 and LM2 are respectively connected with the network interfaces GND and V5.0 of the control mainboard in sequence;
pins with the pin numbers of 2 and 6 of the collision signal level conversion modules LM1 and LM2 are respectively connected with a network interface Ref of the control mainboard, wherein the network interface Ref is used as a reference potential, the network interface Ref is connected to a series node of a resistor R7 and a resistor R8 after a resistor R7 and a resistor R8, and the resistor R7 and the resistor R8 are respectively connected to a network interface V5.0 and GND of the control mainboard;
the network interfaces BP1 and BP2 are respectively connected with pins numbered 3 and 5 of the LM1, and the network interfaces BP3 and BP4 are respectively connected with pins numbered 3 and 5 of the LM 2.
Optionally, in the series circuit of the resistor R7 and the resistor R8, a filter capacitor C5 is connected between the network interface Ref and the network interface GND.
Optionally, the collision signal processing module further includes a collision logic operation module, the collision logic operation module adopts a single-channel 8-input nand gate chip U, and the pin numbers of the nand gate chip U are 1, 2, 3, 4, 7,8 pins are connected with the network interfaces P1, P2, P3, P4, GND and GND in sequence,
Pins with the pin numbers of 5, 6, 11, 12 and 14 of the NAND gate chip U are all connected with a network interface V5.0;
wherein, when the network interfaces P1, P2, P3 and P4 are all high level,
outputting a low level; when at least one of the network interfaces P1, P2, P3, P4 is low,
outputting a high level;
wherein the content of the first and second substances,
for a low level indicating that all collision signals have collided, an
Is the inverted logic level of P.
Optionally, a step pulse enabling module is further integrated in the control main board, and the step pulse enabling module includes two 4-way 2-input nand gates U1 and U2, and a 6-way reverse schmitt trigger chip U3, a jumper switch J2, and a resistor R10;
pins with the pin numbers of 1 to 14 of the NAND gate U1 are sequentially connected with network interfaces P1, Dir _ U1, Step1EN, P2, Dir _ U1, Step2EN, GND, Step3EN, P3, Dir _ U1, Step4EN, P4, Dir _ U1 and V5.0;
pins with the pin numbers of 1-14 of the NAND gate U2 are sequentially connected with a network interface Step, Step1EN, Step1-, Step2EN, Step2-, GND, Step3-, Step3EN, Step4-, Step4EN and V5.0;
the pins with the pin numbers from 1 to 14 of the 6-way reverse Schmitt trigger chip U3 are sequentially connected with the network interfaces Step1-, Step1-, Step2-, Step 2-and Step3-,Step3、GND、Step4、Step4-、P、
Dir and V5.0 are connected.
Optionally, the network interface Dir _ U1 is connected to the network interface through the jumper switch J2
The network interface Dir _ U1 is also connected with the network interface Dir through the resistor R10;
in the step pulse enabling module, when the network interface Dir is at a high level, the motor rotates forwards and pushes the printing platform and the spray head to reduce the distance; when the network interface Dir is at a low level, the motor rotates reversely, and the motor pushes the printing platform to increase the distance between the printing platform and the spray head;
wherein the network interface
Is the inverted logic level of Dir.
The invention also provides a leveling method of the 3D printer, the leveling method levels the printing platform through the 3D printer leveling control system, and the leveling method comprises the following steps:
starting the 3D printer;
a printer mainboard sends a zero position detection control signal to perform zero position detection on four Z axes respectively controlled by a motor;
after the zero detection of the Z axis is completed, the printer mainboard sends a Z axis increasing signal, the direction signal Dir outputs a low level, the low level is processed by the NAND gate U1, the NAND gate U2 and the reverse Schmidt trigger chip U3, and when the four collision signals are in any logic level, the stepping pulse enabling module is in an open state, so that the four motor drive control outputs respectively receive stepping pulse signals sent by the mainboard, the four corners of the printing platform synchronously move downwards, and the leveling is completed.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the automatic leveling function of the invention can enable the 3D printer to automatically level the printing platform in the printing initialization process, so that the extrusion head motion plane is parallel to the printing platform molding surface and keeps a proper distance, the printing precision of the machine and the model molding effect are improved, manual intervention is not needed in the process, the operation is simpler, and the use is convenient.
2. The leveling process of the invention is realized by logic chip control, and the invention does not relate to an operation program and has high response speed; the control mainboard directly sends out a stepping pulse signal and a direction control signal, and the mainboard control signal is input into a feedback module to feed back a collision signal to the mainboard; the functions of all modules of the invention can be independent of the printing control mainboard, and the invention has strong compatibility and is convenient for popularization and use.
3. The collision signal of the invention can come from a limit switch and a photoelectric limit switch, the collision point of the photoelectric limit switch is arranged on the external frame of the 3D printer, and no mechanical collision exists in the leveling process, so that the invention has no mechanical abrasion and is durable in use.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention;
FIG. 2 is a schematic structural diagram of a motherboard motor driving interface Drive _ Z according to the present invention;
FIG. 3 is a schematic structural diagram of a collision feedback interface PZKG according to the present invention;
FIG. 4 is a circuit diagram of an indicator light module of the present invention;
FIG. 5 is a schematic diagram of the electrical connection between the stepper motor interface M1 and the corresponding motor drive control output module according to the present invention;
FIG. 6 is a schematic diagram of the electrical connection between the stepper motor interface M2 and the corresponding motor drive control output module according to the present invention;
FIG. 7 is a schematic diagram of the electrical connection between the stepper motor interface M3 and the corresponding motor drive control output module according to the present invention;
FIG. 8 is a schematic diagram of the electrical connection of the stepper motor interface M4 of the present invention to the corresponding motor drive control output module;
FIG. 9 shows the network interfaces Dir _ M and Dir,
A connection circuit diagram of (1);
fig. 10 is a connection circuit diagram of the collision signal input interface P1 of the present invention;
fig. 11 is a connection circuit diagram of the collision signal input interface P2 of the present invention;
fig. 12 is a connection circuit diagram of the collision signal input interface P3 of the present invention;
fig. 13 is a connection circuit diagram of the collision signal input interface P4 of the present invention;
fig. 14 is a connection circuit diagram of the impact signal level conversion module LM1 of the present invention;
fig. 15 is a connection circuit diagram of the impact signal level conversion module LM2 of the present invention;
FIG. 16 is a circuit diagram of the connection of the resistor R7 and the resistor R8 according to the present invention;
FIG. 17 is a circuit diagram of the NAND chip U of the present invention;
FIG. 18 is a circuit diagram of the NAND gate chip U1 of the present invention;
FIG. 19 shows the network interfaces Dir _ U1 and Dir,
A connection circuit diagram of (1);
FIG. 20 is a circuit diagram of the NAND gate chip U2 of the present invention;
fig. 21 is a circuit diagram of the nand gate chip U3 according to the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the invention discloses a 3D printer leveling control system, which comprises a control mainboard, a motor drive control output module, a collision switch sensor, a collision signal processing module, and a mainboard control signal input feedback module, wherein the motor drive control output module, the collision signal processing module, and the mainboard control signal input feedback module are respectively integrated in the control mainboard and connected with corresponding connection serial ports in the control mainboard, and the collision switch sensor is arranged on a frame upright post of a 3D printer and used for acquiring a collision signal of a printing platform of the 3D printer and outputting the collision signal of the printing platform; the mainboard control signal input feedback module is used for feeding back a motor driving signal and a collision signal to the motor driving control output module.
In the invention, a collision signal processing module acquires a collision signal from a collision switch sensor, and feeds the acquired collision signal back to a main board control signal input feedback module after processing, the main board control signal input feedback module sends an action signal to a corresponding motor drive control output module according to the collision signal provided by the collision signal processing module, and the corresponding motor drive control output module sends the action signal to a corresponding motor arranged on a frame upright post of the 3D printer. The invention realizes the automatic leveling of the printing platform of the corexy type 3D printer in the using process, each module can be independent of the 3D printer mainboard and is matched with the 3D printer mainboard for use, and the corexy type 3D printer has strong compatibility, easy popularization and convenient use.
The technical solution of the present invention is described in detail below with specific examples.
Example 1
In this embodiment, the outer frame of the 3D printer has 4 columns, and therefore, a lifting system driven by a stepping motor is installed on each column for controlling the lifting of the printing platform.
The main board control signal input feedback module specifically comprises a main board motor driving interface Drive _ Z, a collision feedback interface PZKG and an indicator light module, and a circuit diagram of the indicator light module is shown in fig. 4.
As shown in fig. 2, in the motherboard motor Drive interface Drive _ Z, interfaces with interface numbers 1, 2, 7, and 8 are sequentially connected to the network interfaces GND, V5.0, GND, and V12 of the control motherboard, and interfaces with interface numbers 9, 10, 11, 12, 13, 14, 15, and 16 are sequentially connected to the network interfaces EN, m1, m2, m3, Rest, Sleep, Step, and Dir of the control motherboard.
As shown in fig. 3, in the collision feedback interface PZKG, the interfaces with the interface numbers 1, 2, and 3 are sequentially connected to the network interface P of the control motherboard,
GND is connected.
The number of the motor drive control output modules is four, the four motor drive control output modules respectively control the operation of the four motors, and the motor drive control output modules respectively adopt DRV8825 control chips, as shown in fig. 5 to 8, the four motor drive control output modules respectively comprise stepping motor interfaces M1, M2, M3, M4, and a direction selection jumper switch J1, pins of the four motor drive control output modules with pin numbers of 1, 2, 7, 8, 9, 10, 11, 12, 13, 14, 16 are respectively and sequentially connected with network interfaces GND, V5.0, GND, V12, EN, M1, M2, M3, Rest, Sleep, Dir _ M of the control main board. The pins with the pin numbers of 15 of the four motor drive control output modules are sequentially connected with the network interfaces Step1, Step2, Step3 and Step4 of the control mainboard. The pins with the pin numbers of 3, 4, 5 and 6 of the four motor drive control output modules are sequentially connected with the corresponding pins 1B, 1A, 2B and 2A in the stepping motor interfaces M1, M2, M3 and M4.
In the network interface of the control motherboard, as shown in fig. 9, the network interface Dir _ M is connected to the network interface Dir through the direction selection jumper switch J1, and the network interface Dir _ M is also connected to the network interface of the control motherboard through the resistor R9
Connected so as to selectively control the rotation direction of the motor. In the motor drive control output module, the network interface Dir outputs the positive rotation of the high-level motor and outputs the DirLow level motor reversal, network interface
The output high-level motor is reversely rotated,
and outputting the low-level motor to rotate forwards.
In this embodiment, as shown in fig. 10 to 13, the collision signal processing module includes four collision signal input interfaces P1, P2, P3, and P4, and two collision signal level conversion modules LM1 and LM2, where the two collision signal level conversion modules LM1 and LM2 respectively adopt an LM358 chip.
The pins with the pin numbers of 1 of the four collision signal input interfaces P1, P2, P3 and P4 are respectively connected with a network interface V5.0 of the control mainboard, the pins with the pin numbers of 3 of the four collision signal input interfaces P1, P2, P3 and P4 are respectively connected with a network interface GND of the control mainboard, and the pins with the pin numbers of 2 of the four collision signal input interfaces P1, P2, P3 and P4 are sequentially connected with the network interfaces BP1, BP2, BP3 and BP4 of the control mainboard. In the collision signal input interfaces P1, P2, P3 and P4, jitter elimination capacitors C1, C2, C3 and C4 are respectively connected between two pins with pin numbers 1 and 2 to eliminate the phenomenon of motor jitter.
As shown in fig. 14 and 15, the pins with pin numbers 4 and 8 of the crash signal level conversion modules LM1 and LM2 are respectively connected to the network interfaces GND and V5.0 of the control motherboard in sequence. Pins with pin numbers 2 and 6 of the collision signal level conversion modules LM1 and LM2 are respectively connected with a network interface Ref of the control mainboard, wherein the network interface Ref is used as a reference potential, the network interface Ref is connected to a series node of a resistor R7 and a resistor R8 behind a resistor R7 and a resistor R8, and the resistor R7 and the resistor R8 are respectively connected to network interfaces V5.0 and GND of the control mainboard. The network interfaces BP1 and BP2 are respectively connected with pins with the numbers of 3 and 5 of LM1, and the network interfaces BP3 and BP4 are respectively connected with pins with the numbers of 3 and 5 of LM 2.
As shown in fig. 16, in the series circuit of the resistor R7 and the resistor R8, a filter capacitor C5 is connected between the network interface Ref and the network interface GND.
In this embodiment, the collision signal processing module further includes a collision logic operation module, the collision logic operation module employs a single 8-input nand gate chip U, such as the chip 74HC30, and as shown in fig. 17, pins of the nand gate chip U with pin numbers 1, 2, 3, 4, 7, and 8 are sequentially connected with the network interfaces P1, P2, P3, P4, GND, and the nand gate chip U,
And pins with the pin numbers of 5, 6, 11, 12 and 14 of the NAND gate chip U are all connected with the network interface V5.0.
In this embodiment, a step pulse enable module is further integrated in the control motherboard, and the step pulse enable module includes two 4-way 2-input nand gates U1 and U2, such as chip 74HC00, and a 6-way reverse schmitt trigger chip U3, such as chip 74HC14D, jumper switch J2, and resistor R10.
Specifically, as shown in fig. 18, pins numbered 1 to 14 of the nand gate U1 are sequentially connected to the network interfaces P1, Dir _ U1, Step1EN, P2, Dir _ U1, Step2EN, GND, Step3EN, P3, Dir _ U1, Step4EN, P4, Dir _ U1, and V5.0.
As shown in FIG. 20, pins numbered 1 to 14 of the NAND gate U2 are sequentially connected with the network interfaces Step, Step1EN, Step1-, Step2EN, Step2-, GND, Step3-, Step3EN, Step4-, Step4EN and V5.0.
As shown in FIG. 21, the pins numbered 1 to 14 of the 6-way reverse Schmitt trigger chip U3 are sequentially connected with the network interfaces Step1-, Step1, Step2-, Step2, Step3-, Step3, GND, Step4, Step4-, P,
Dir and V5.0 are connected.
As shown in FIG. 19, the network interface Dir _ U1 is connected to the network interface through the jumper switch J2
And the network interface Dir _ U1 is also connected with the network interface Dir through a resistor R10. In thatIn the step pulse enabling module, a network interface Dir outputs a high level motor to rotate forwards, a Dir outputs a low level motor to rotate backwards, and the network interface outputs a low level motor to rotate backwards
The output high-level motor is reversely rotated,
and outputting the low-level motor to rotate forwards.
The invention also provides a leveling method of the 3D printer according to the leveling control system, and the leveling method comprises the following steps:
and S1, starting the 3D printer.
And S2, the printer mainboard sends out zero position detection control signals, and zero position detection is carried out on four Z axes controlled by the motors respectively.
In the zero position detection process, if at least one path of the four Z-axis collisions is not in the zero position, not all of the network interfaces P1, P2, P3 and P4 output high levels. After four paths of collision signals are processed by the NAND gate U and the reverse Schmidt trigger chip U3, the output low level P is fed back to the printer mainboard, and the printer mainboard continues to send zero detection signals when no collision occurs completely. When the Dir is at a high level, the motor rotates forwards, the printing platform moves upwards, the Z value is reduced, and the four Z-axis collisions are all at zero positions.
When the network interfaces P1, P2, P3 and P4 all output high levels, after four paths of collision signals are processed by the NAND gate U and the reverse Schmidt trigger chip U3, the output high levels P are fed back to the printer mainboard to indicate that the four paths of collision signals completely occur, the printer mainboard stops sending out Z zero detection signals, and Z zero detection is completed.
On the other hand, the printer motherboard sends out a zero detection control signal, and in the process of performing zero detection on four Z axes, if a certain path of network interface Pn (n takes 1, 2, 3 or 4) detects that a collision outputs a high level, the path of signal is processed by a nand gate U1, a nand gate U2 and a reverse schmitt trigger chip U3, the enable of the path of stepping pulse signal Step n (n takes 1, 2, 3 or 4) is turned off, the path of stepping motor stops rotating forwards, and other stepping motors which do not detect the collision still continue rotating forwards.
S3, after the zero position detection of the Z axis is completed, the printer mainboard sends a Z axis increasing signal, and the direction signal Dir outputs a low level; after the processing of the NOT gate U1, the NOT gate U2 and the reverse Schmidt trigger chip U3, no matter what logic level the four collision signals are, the enabling of Step n (n takes 1, 2, 3 or 4) is in the opening state, and the four-way motor drive control output module can receive the Step pulse signal Step sent by the main board, so that the four corners of the printing platform synchronously move downwards to finish leveling.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Other technical features than those described in the specification are known to those skilled in the art, and are not described herein in detail in order to highlight the innovative features of the present invention.
Claims (10)
1. A3D printer leveling control system, comprising:
a control main board;
the motor drive control output module is integrated in the control main board and is connected with a corresponding connecting serial port in the control main board;
the collision switch sensor is arranged on a frame upright post of the 3D printer and used for acquiring a collision signal of a printing platform of the 3D printer and outputting the collision signal of the printing platform;
the collision signal processing module is integrated in the control mainboard and is connected with a corresponding connecting serial port in the control mainboard;
the main board control signal input feedback module is integrated in the control main board and is used for receiving motor driving signals fed back by the collision signal processing module and the motor driving signals fed back by the motor driving control output module;
the collision signal processing module acquires a collision signal from the collision switch sensor, processes the acquired collision signal and feeds the processed collision signal back to the main board control signal input feedback module, the main board control signal input feedback module sends an action signal to the corresponding motor drive control output module according to the collision signal provided by the collision signal processing module, and the corresponding motor drive control output module sends an action signal to a corresponding motor installed on a frame upright post of the 3D printer.
2. The 3D printer leveling control system according to claim 1, wherein the motherboard control signal input feedback module comprises a motherboard motor Drive interface Drive _ Z, a collision feedback interface PZKG;
in the mainboard motor driving interface Drive _ Z, interfaces with interface numbers of 1, 2, 7 and 8 are sequentially connected with network interfaces GND, V5.0, GND and V12 of the control mainboard, and interfaces with interface numbers of 9, 10, 11, 12, 13, 14, 15 and 16 are sequentially connected with network interfaces EN, m1, m2, m3, Rest, Sleep, Step and Dir of the control mainboard;
in the collision feedback interface PZKG, the interfaces with the interface numbers 1, 2 and 3 are sequentially connected with the network interface P of the control mainboard,
GND is connected.
3. The 3D printer leveling control system according to claim 2, wherein the number of the motor drive control output modules is four, and each motor drive control output module adopts a DRV8825 control chip, each of the four motor drive control output modules comprises a stepping motor interface M1, M2, M3, M4, and a direction selection jumper switch J1, and pins with pin numbers of 1, 2, 7, 8, 9, 10, 11, 12, 13, 14, 16 of the four motor drive control output modules are respectively connected with a network interface GND, V5.0, GND, V12, EN, M1, M2, M3, Rest, Sleep, Dir _ M of a control main board in sequence;
the four pins with the pin number of 15 of the motor drive control output module are sequentially connected with the network interfaces Step1, Step2, Step3 and Step4 of the control mainboard;
the pins with the pin numbers of 3, 4, 5 and 6 of the four motor drive control output modules are sequentially connected with the corresponding pins 1B, 1A, 2B and 2A in the stepping motor interfaces M1, M2, M3 and M4.
4. The 3D printer leveling control system according to claim 3, wherein in the network interface of the control motherboard, the network interface Dir _ M is connected to the network interface Dir through the direction selection jumper switch J1, and the network interface Dir _ M is further connected to the network interface of the control motherboard through a resistor R9
Connecting;
in the motor drive control output module, when the network interface Dir is at a high level, the motor rotates forwards, and the motor pushes the printing platform to reduce the distance between the printing platform and the spray head; when the network interface Dir is at a low level, the motor rotates reversely, and the motor pushes the printing platform to increase the distance between the printing platform and the spray head;
network interface
Is the inverted logic level of Dir.
5. The 3D printer leveling control system according to claim 4, wherein the crash signal processing module comprises four crash signal input interfaces P1, P2, P3, P4, and two crash signal level conversion modules LM1, LM2, the two crash signal level conversion modules LM1, LM2 respectively adopt LM358 chips; the interfaces P1, P2, P3 and P4 output logic high level to represent that collision occurs, and output logic low level to represent that collision does not occur;
the four pins with the pin number of 1 of the collision signal input interfaces P1, P2, P3 and P4 are respectively connected with a network interface V5.0 of the control mainboard, the pins with the pin number of 3 of the four collision signal input interfaces P1, P2, P3 and P4 are respectively connected with a network interface GND of the control mainboard, and the pins with the pin number of 2 of the four collision signal input interfaces P1, P2, P3 and P4 are sequentially connected with the network interfaces BP1, BP2, BP3 and BP4 of the control mainboard;
pins with the pin numbers of 4 and 8 of the collision signal level conversion modules LM1 and LM2 are respectively connected with the network interfaces GND and V5.0 of the control mainboard in sequence;
pins with the pin numbers of 2 and 6 of the collision signal level conversion modules LM1 and LM2 are respectively connected with a network interface Ref of the control mainboard, wherein the network interface Ref is used as a reference potential, the network interface Ref is connected to a series node of a resistor R7 and a resistor R8 after a resistor R7 and a resistor R8, and the resistor R7 and the resistor R8 are respectively connected to a network interface V5.0 and GND of the control mainboard;
the network interfaces BP1 and BP2 are respectively connected with pins numbered 3 and 5 of the LM1, and the network interfaces BP3 and BP4 are respectively connected with pins numbered 3 and 5 of the LM 2.
6. The 3D printer leveling control system according to claim 5, characterized in that a filter capacitor C5 is connected between the network interface Ref and the network interface GND in a series circuit of a resistor R7 and a resistor R8.
7. The 3D printer leveling control system according to claim 6, wherein the collision signal processing module further comprises a collision logic operation module, the collision logic operation module adopts a single-path 8-input NAND gate chip U, andpins with the pin numbers of 1, 2, 3, 4, 7 and 8 of the NOT gate chip U are sequentially connected with the network interfaces P1, P2, P3, P4, GND,
Pins with the pin numbers of 5, 6, 11, 12 and 14 of the NAND gate chip U are all connected with a network interface V5.0;
wherein, when the network interfaces P1, P2, P3 and P4 are all high level,
outputting a low level; when at least one of the network interfaces P1, P2, P3, P4 is low,
outputting a high level;
wherein the content of the first and second substances,
for a low level indicating that all collision signals have collided, an
Is the inverted logic level of P.
8. The 3D printer leveling control system according to claim 7, wherein a step pulse enabling module is further integrated in the control main board, and the step pulse enabling module comprises two 4-way 2-input NAND gates U1 and U2, and a 6-way reverse Schmidt trigger chip U3, a jumper switch J2, a resistor R10;
pins with the pin numbers of 1 to 14 of the NAND gate U1 are sequentially connected with network interfaces P1, Dir _ U1, Step1EN, P2, Dir _ U1, Step2EN, GND, Step3EN, P3, Dir _ U1, Step4EN, P4, Dir _ U1 and V5.0;
pins with the pin numbers of 1-14 of the NAND gate U2 are sequentially connected with a network interface Step, Step1EN, Step1-, Step2EN, Step2-, GND, Step3-, Step3EN, Step4-, Step4EN and V5.0;
the pins with the pin numbers from 1 to 14 of the 6-way reverse Schmitt trigger chip U3 are sequentially connected with the network interfaces Step1-, Step1-, Step2-, Step2-, Step3-, Step3-, GND-, Step4-, Step4-, P-, and N-type bus interface,
Dir and V5.0 are connected.
9. The 3D printer leveling control system of claim 8, wherein the network interface Dir _ U1 is in communication with the network interface through the jumper switch J2
The network interface Dir _ U1 is also connected with the network interface Dir through the resistor R10;
in the step pulse enabling module, when the network interface Dir is at a high level, the motor rotates forwards and pushes the printing platform and the spray head to reduce the distance; when the network interface Dir is at a low level, the motor rotates reversely, and the motor pushes the printing platform to increase the distance between the printing platform and the spray head;
wherein the network interface
Is the inverted logic level of Dir.
10. A leveling method of a 3D printer, wherein the leveling method levels a printing platform through the 3D printer leveling control system of claim 9, the leveling method comprising the steps of:
starting the 3D printer;
a printer mainboard sends a zero position detection control signal to perform zero position detection on four Z axes respectively controlled by a motor;
after the zero detection of the Z axis is completed, the printer mainboard sends a Z axis increasing signal, the direction signal Dir outputs a low level, the low level is processed by the NAND gate U1, the NAND gate U2 and the reverse Schmidt trigger chip U3, and when the four collision signals are in any logic level, the stepping pulse enabling module is in an open state, so that the four motor drive control outputs respectively receive stepping pulse signals sent by the mainboard, the four corners of the printing platform synchronously move downwards, and the leveling is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214170.5A CN111331846A (en) | 2020-03-24 | 2020-03-24 | Leveling control system and leveling method for 3D printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214170.5A CN111331846A (en) | 2020-03-24 | 2020-03-24 | Leveling control system and leveling method for 3D printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111331846A true CN111331846A (en) | 2020-06-26 |
Family
ID=71176662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010214170.5A Pending CN111331846A (en) | 2020-03-24 | 2020-03-24 | Leveling control system and leveling method for 3D printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111331846A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203705858U (en) * | 2013-11-26 | 2014-07-09 | 深圳市诺为汽车电子有限公司 | Mainboard control system based on automobile original vehicle screen upgrading decoder |
| US20170072626A1 (en) * | 2015-09-14 | 2017-03-16 | Xerox Corporation | Thermal management methods and apparatus for producing uniform material deposition and curing for high speed three-dimensional printing |
| CN106877759A (en) * | 2017-04-07 | 2017-06-20 | 广州黑格智造信息科技有限公司 | A kind of master control borad and 3D printer |
| CN107718564A (en) * | 2017-10-13 | 2018-02-23 | 北京恒创增材制造技术研究院有限公司 | A kind of FDM three-dimensional printers intelligence control system and method |
| CN108081594A (en) * | 2018-01-26 | 2018-05-29 | 威海彩悦自动化设备股份有限公司 | A kind of platform automatic leveling device of 3D printer |
| CN207630532U (en) * | 2017-08-07 | 2018-07-20 | 北京紫熙科技发展有限公司 | 3d printer |
| CN207669788U (en) * | 2017-12-04 | 2018-07-31 | 广州迈迪三维电子设备有限公司 | A kind of leveling system of 3D printer |
-
2020
- 2020-03-24 CN CN202010214170.5A patent/CN111331846A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203705858U (en) * | 2013-11-26 | 2014-07-09 | 深圳市诺为汽车电子有限公司 | Mainboard control system based on automobile original vehicle screen upgrading decoder |
| US20170072626A1 (en) * | 2015-09-14 | 2017-03-16 | Xerox Corporation | Thermal management methods and apparatus for producing uniform material deposition and curing for high speed three-dimensional printing |
| CN106877759A (en) * | 2017-04-07 | 2017-06-20 | 广州黑格智造信息科技有限公司 | A kind of master control borad and 3D printer |
| CN207630532U (en) * | 2017-08-07 | 2018-07-20 | 北京紫熙科技发展有限公司 | 3d printer |
| CN107718564A (en) * | 2017-10-13 | 2018-02-23 | 北京恒创增材制造技术研究院有限公司 | A kind of FDM three-dimensional printers intelligence control system and method |
| CN207669788U (en) * | 2017-12-04 | 2018-07-31 | 广州迈迪三维电子设备有限公司 | A kind of leveling system of 3D printer |
| CN108081594A (en) * | 2018-01-26 | 2018-05-29 | 威海彩悦自动化设备股份有限公司 | A kind of platform automatic leveling device of 3D printer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208342239U (en) | A kind of five-axle linkage swing hair style machining center | |
| CN100519098C (en) | Parallel machine with restructurable configuration and scale | |
| CN204832853U (en) | Many interfaces motion control ware | |
| CN107160390B (en) | Driving and controlling integrated control system for cooperative robot and preparation method thereof | |
| CN102291075B (en) | Integrated circuit for driving and control three groups of stepper motors | |
| CN109991930A (en) | A kind of integrated robot drive control board and its control method, robot | |
| CN102927945B (en) | A kind of stroke detecting method and system | |
| CN111331846A (en) | Leveling control system and leveling method for 3D printer | |
| CN201163363Y (en) | General multi-axis motion control system on numerical control machine | |
| CN105666888B (en) | A kind of numerical control former based on FDM technology | |
| CN103612491A (en) | Laser marking control card | |
| US6537055B2 (en) | Removing apparatus for molded products | |
| JPS6161818A (en) | Control system of rotation of screw in injection molding machine | |
| CN201878084U (en) | Driving and controlling device for stepper motor | |
| CN207764593U (en) | Electro-hydraulic bender digital control system | |
| CN106643716A (en) | MEMS inertial measuring device with redundant signal acquisition strategy | |
| Onwubolu et al. | Development of a PC-based computer numerical control drilling machine | |
| CN210477818U (en) | Biological simulation 3D printer | |
| CN101034294A (en) | Double axis locating system | |
| CN101439574B (en) | Film-delivering equipment for injection mould | |
| CN203883727U (en) | Integrated mini-sized stepping motor control system | |
| CN206348618U (en) | A kind of motion controller with multiplex roles | |
| CN208714492U (en) | A kind of screw rod extrusion type 3D printer | |
| CN111880459B (en) | Control device | |
| CN108466423A (en) | A kind of screw rod extrusion type 3D printer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Bo Inventor after: Wang Dong Inventor before: Zhang Bo |
|
| CB03 | Change of inventor or designer information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200626 |
|
| RJ01 | Rejection of invention patent application after publication |