CN211616642U

CN211616642U - Control device of 3D network printer

Info

Publication number: CN211616642U
Application number: CN201922202385.0U
Authority: CN
Inventors: 傅仁轩
Original assignee: Guangdong College of Industry and Commerce
Current assignee: Guangdong College of Industry and Commerce
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-10-02
Anticipated expiration: 2029-12-10

Abstract

The utility model provides a control device of a 3D network printer, which comprises a communication module, a camera module, a printing module and a processor; the processor is respectively connected with the communication module, the camera module and the printing module; the camera module comprises a camera and a holder controller for controlling the shooting direction of the camera; the camera with the cloud platform controller is connected, and the camera, the cloud platform controller corresponds respectively and is connected to the data port of making a video recording, cloud platform control end of treater. The utility model provides a controlling means of 3D network printer can receive or send information for long-range user side in the 3D printer printing work process to realize that long-range user side monitors the 3D printer in the work.

Description

Control device of 3D network printer

Technical Field

The utility model belongs to the technical field of the automatic technique and specifically relates to a controlling means of 3D network printer is related to.

Background

The 3D printing manufacturing technology is a forming manufacturing technology for stacking and solidifying special functional materials layer by layer through software and a numerical control system according to three-dimensional design and three-dimensional calculation of a computer, and manufacturing a three-dimensional object by printing a layer by layer of bonding materials. 3D printing brings a worldwide manufacturing revolution, whether the previous part design can be realized by depending on a production process or not can be realized, and the appearance of a 3D printer can subvert the production thought, so that an enterprise does not need to consider the production process problem when producing parts, the design of any complex shape can be realized by the 3D printer, and objects in any shape can be directly generated from computer graphic data without machining or a die, so that the production period of products is greatly shortened, and the production efficiency is improved.

However, the existing 3D printer has a very high degree of automation, and after a printing template is input, a user can only wait for a printing result, which makes it difficult to monitor the printing process.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a controlling means of 3D network printer can receive or send information for long-range user side in the 3D printer printing work process to realize that long-range user side monitors the 3D printer in the work. The technical scheme is as follows:

the embodiment of the utility model provides a control device of 3D network printer, the control device of 3D network printer includes communication module, camera module, print module and treater; the processor is respectively connected with the communication module, the camera module and the printing module;

the camera module comprises a camera and a holder controller for controlling the shooting direction of the camera; the camera with the cloud platform controller is connected, and the camera, the cloud platform controller corresponds respectively and is connected to the data port of making a video recording, cloud platform control end of treater.

Preferably, the printing module comprises an X-axis printing assembly, a Y-axis printing assembly, a Z-axis printing assembly and an extruder printing assembly; the X-axis printing assembly, the Y-axis printing assembly, the Z-axis printing assembly and the extruder printing assembly are correspondingly connected to an X-dimension control end, a Y-dimension control end, a Z-dimension control end and a material quantity control end of the processor.

Preferably, the X-axis printing assembly, the Y-axis printing assembly and the Z-axis printing assembly each comprise a stepping motor and a driver; the driver comprises a step angle control input end, a pulse input end, a forward and reverse rotation control input end and a control output end correspondingly connected with the stepping motor;

the step angle control input end, the pulse input end and the positive and negative rotation control input end are correspondingly connected with the step angle control output end, the pulse output end and the positive and negative rotation control output end of the processor.

As a preferred scheme, the control device of the 3D network printer further comprises a temperature control module for controlling the temperature of the extruder; the temperature control module is connected with the processor;

the temperature control module comprises a temperature sensor; the temperature sensor is connected to a temperature data port of the processor.

Preferably, the control device of the 3D network printer further includes a storage module for storing operation data, and the storage module is connected to the processor.

Preferably, the storage module comprises a NORFLASH memory for storing programs and important data required by the system operation and an SDRAM memory for storing the programs and data during the system operation.

Preferably, the control device of the 3D network printer further comprises a touch screen, and the touch screen is connected to the processor.

As a preferred scheme, the control device of the 3D network printer further includes a power supply module, where the power supply module includes a first voltage conversion chip, a second voltage conversion chip, and a third voltage conversion chip;

and the output end of the first voltage conversion chip is respectively connected with the input ends of the second voltage conversion chip and the third voltage conversion chip.

Preferably, the first voltage conversion chip is LM2596S-5, the input voltage is 12-40V, and the output voltage is 5V;

the second voltage conversion chip is NCPLll7ST33T3, the input voltage is 5V, and the output voltage is 3.3V;

the third voltage conversion chip is NCPLll7STl8T3, the input voltage is 5V, and the output voltage is 1.8V.

Preferably, the communication module is a communication chip having functions of ethernet communication, RS232/485 communication, or wireless communication.

Compared with the prior art, the embodiment of the utility model provides a have following beneficial effect:

the utility model provides a control device of a 3D network printer, which comprises a communication module, a camera module, a printing module and a processor; the processor is respectively connected with the communication module, the camera module and the printing module; the communication module can receive or send information of a remote client and transmit a control command of the client to the processor; the processor analyzes the control command and controls the camera module to shoot image data or controls the printing module to execute a printing task; and the image data shot by the camera module can be fed back to the client through the processor and the communication module, so that the remote client can monitor the working 3D printer. Furthermore, the camera module controls the camera through the holder controller, and multi-angle shooting is carried out according to the control command of the client, so that remote interaction between the client and the printer is realized.

Drawings

Fig. 1 is a schematic connection diagram of a processor and a communication module of a control device of a 3D network printer according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram of a processor and a pan-tilt controller of a control device of a 3D network printer according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an internal connection of a power module of a control device of a 3D network printer according to an embodiment of the present invention;

fig. 4 is a schematic connection diagram of a processor and a stepping motor of a control device of a 3D network printer according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a connection between a processor and a driver of a control device of a 3D network printer according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a first connection between a processor and a temperature control module of a control device of a 3D network printer according to an embodiment of the present invention;

fig. 7 is a second connection diagram of the processor and the temperature control module of the control device of the 3D network printer according to the embodiment of the present invention;

fig. 8 is a schematic connection diagram of a processor and a touch screen of a control device of a 3D network printer according to an embodiment of the present invention;

fig. 9 is a structural diagram of a control device of a 3D network printer in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the utility model provides a control device of 3D network printer, the control device of 3D network printer includes communication module, camera module, print module and treater; the processor is respectively connected with the communication module, the camera module and the printing module; it will be appreciated that the processor may also be referred to as a controller, CPU, or the like.

The processor is the core of a 3D printing control system, realizes communication with a server and an upper designer host through a communication module, selects AT91RM9200, is a high-performance ARM920T core-based low-power consumption 16/32-bit RISC microprocessor developed by Atmel company, integrates rich peripheral resources and peripheral interfaces in the processor, and provides a single-chip solution for low-power consumption, low-cost and high-performance computer application. The method is suitable for industrial control and the like which require rich peripheral resources, low power consumption and stable work. The AT91RM9200 microprocessor has the highest main frequency of 180MHz, 16KB of SRAM and 128KB of ROM, 16KB of data cache and 16KB of instruction cache, a high-level interrupt controller, 4 32-bit PIO controllers, 4 universal synchronous/asynchronous serial transceivers (UASRT), JTAG/ICE interfaces and the like.

The communication module has the functions of Ethernet communication, RS232/485 communication or wireless communication.

Referring to fig. 1, when the controller is used for ethernet communication, the controller is accessed to a 3D printer control system through an RJ45 interface, the controller can communicate with a server, a designer, and a user, receive a control instruction, implement remote control, and upload working state data of a 3D printer in real time. The user can control online, can look over the operating condition of 3D printer simultaneously.

The user sends a command of requesting to check the field printed product to a designer through a communication network, the designer sends a command of opening the camera to the printer controller after receiving the request command, the controller opens the camera, the camera is aligned to the printed product, and meanwhile the camera is rotated upwards, downwards, leftwards and rightwards to send a real-time image. If the user is not satisfied with the printing effect, modification suggestions can be provided, a designer can modify the product on line, the printer is controlled by the controller to print the modified product, and the user can check the printing effect on line until the user is satisfied, so that the user experience is improved.

The Ethernet communication interface adopts an ENC28J60 interface chip and an independent Ethernet controller with an SPI interface, supports full-duplex and half-duplex modes and has two programmable LED outputs for indicating connection, sending and receiving working states.

When the method is used for wireless communication, a communication port of a wireless terminal, such as wifi, Bluetooth, LoRa, NB-IOT, a mobile phone and the like, receives an inquiry instruction of the wireless terminal, such as a mobile phone client, and returns required data to the wireless terminal.

The camera module comprises a camera and a holder controller for controlling the shooting direction of the camera; the camera is connected with the holder controller, and the camera and the holder controller are respectively and correspondingly connected to a camera data port and a holder control end of the processor;

in this embodiment, the pan/tilt controller includes an RS232/485 communication interface, a digital input interface, and a digital output interface.

Please refer to fig. 2, the motion of the camera is controlled by an RS232/RS485 interface, a designer sends a control instruction to the controller of the 3D printer through the network, the 3D printer controller analyzes the instruction code after receiving the instruction and sends the instruction to the pan-tilt controller, so as to control the rotation of the camera up and down, left and right, adjust the angle of the photosensitive chip to obtain the clearest video image, and further monitor different positions of the 3D printer.

Referring to fig. 3, the control device of the 3D network printer further includes a power module. The power supply module comprises a first voltage conversion chip, a second voltage conversion chip and a third voltage conversion chip;

the first voltage conversion chip is a voltage conversion chip LM2596S-5, the input voltage of the first voltage conversion chip is 12-40V, the output voltage of the first voltage conversion chip is 5V, and the maximum output current of the first voltage conversion chip is 3A;

the second voltage conversion chip is a voltage conversion chip NCPLll7ST33T3, the input voltage of the second voltage conversion chip is 5V, the output voltage of the second voltage conversion chip is 3.3V, and the maximum output current of the second voltage conversion chip is 0.8A;

the third voltage conversion chip selects NCPLll7STl8T3, the input voltage of the third voltage conversion chip is 5V, the output voltage of the third voltage conversion chip is 1.8V, and the maximum output current of the third voltage conversion chip is 0.8A.

The printing module comprises an X-axis printing assembly, a Y-axis printing assembly, a Z-axis printing assembly and an extruder printing assembly; the X-axis printing assembly, the Y-axis printing assembly, the Z-axis printing assembly and the extruder printing assembly are correspondingly connected to an X-dimension control end, a Y-dimension control end, a Z-dimension control end and a material quantity control end of the processor.

Wherein the extruder printing assembly comprises an extruder for ejecting printing stock.

The X-axis printing assembly, the Y-axis printing assembly and the Z-axis printing assembly respectively comprise a stepping motor and a driver; the driver comprises a step angle control input end, a pulse input end, a forward and reverse rotation control input end and a control output end correspondingly connected with the stepping motor;

Referring to fig. 4, the processor controls the three axes of X, Y and Z and the servo or stepping motor of the extruder.

Referring to fig. 5, X, Y, Z is provided with a driver for the extruder and the CPU controls the driver to precisely control the stepping motor.

X, Y, Z the position control of the shaft and the extruder is realized by the same circuit, in order to reduce or eliminate the low frequency vibration of the stepping motor and improve the running precision of the motor, a driver THB6064H with subdivision technology is selected, the PA0-PA2 of the CPU controls different binary numbers of M1, M2 and M3 to form different subdivisions, and the actual step angle when the motor runs after the subdivision is a fraction of the basic step angle. The PA3 of the CPU controls the pulse input to the driver, the pulse frequency is proportional to the speed of the motor, and varying the pulse frequency adjusts the speed. The PA4 controls the positive and negative rotation, and the OUT1A, OUT1B, OUT2A and OUT2B outputs of the driver control the motion of the stepping motor.

In the embodiment, the three axes of the X axis, the Y axis and the Z axis of the 3D printer and the motor of the extruder are controlled by adopting a PWM pulse width (a PWM signal is output by a CPU) modulation technology, so that the accurate printing of a printed piece is realized.

The control device of the 3D network printer further comprises a temperature control module for controlling the temperature of the extruder; the temperature control module is connected with the processor;

the temperature control module comprises a temperature sensor; the temperature sensor is connected to a temperature data port of the processor; it is understood that, in order to control the temperature, the value of the temperature sensor needs to be read in real time and compared with the set target value of the temperature. The temperature value belongs to an analog quantity, and the temperature control module further needs to perform data transmission with the processor through a digital-to-analog converter.

Referring to fig. 6 and 7, the a/D converter selects a 12-bit AD7490, and is connected to the CPU through the SPI, and the analog input type can select voltage and current, and acquire analog parameters such as the temperature of the heating bed and the temperature of the extruder. In order to set a target temperature value, an analog output interface is required. The D/A converter selects X7900 with 12 bits, is connected with the CPU through the SPI, and can output voltage and current with optional analog quantity types. For controlling the temperature of the extruder and other analog quantities.

It will be appreciated that temperature control at the printer nozzle is a guarantee of smooth extrusion of the material. Different printing raw materials, the temperature range that heating intracavity needs also is different, and only the temperature in heating chamber keeps being in the temperature that the raw materials just is in molten state, and the raw materials just can be by even blowout. If the temperature is too high, the discharge hole of the nozzle may have the phenomenon of wire drawing, and if the temperature is too low, the material just sprayed out of the nozzle is instantly solidified, so that the nozzle is blocked. Temperature control in the print head affects not only print accuracy, but also print quality. In this embodiment, the PID algorithm is used to control the temperature of the heating rod, and different temperatures are set for different raw materials, and the expression of PID control:

KP is a proportional gain, TI is an integral time constant, TD is a derivative time constant, u (t) is a control quantity temperature, e (t) is a deviation between a measured temperature and a given temperature, the measured temperature is a temperature of a temperature sensor read by an analog quantity input interface, and the given temperature value is a temperature value output by an analog quantity.

The control device of the 3D network printer further comprises a storage module used for storing operation data, and the storage module is connected with the processor.

The storage module comprises a NORFLASH memory and an SDRAM memory;

the NORFLASH memory is used for storing programs and important data required by system operation, and the programs and the data cannot be lost even if power is off. The chip used in the design is AT49BNl614T manufactured by Atmel corporation, the storage capacity of the chip is 2MB, the working voltage is 3.3V, and 56-pin TSOP packaging is adopted, so that compatibility with AT91RM9200 is maintained.

The SDRAM memory is used for storing programs and data during system operation, and the programs and data are lost after power failure. Two pieces of SDRAM with data width of 16 bits are used in the design, and one SDRAM module with data width of 32 bits is used in the design, so that the high performance of the microprocessor with data width of 32 bits is fully exerted. The chip used in the design is HY57V561620, the storage capacity is 32MB, the working voltage is 3.3V, and 54-pin TSOP packaging is adopted.

The control device of the 3D network printer further comprises a touch screen, and the touch screen is connected with the processor;

referring to fig. 8, the touch screen is an LCD touch screen, a 10-inch TFT color touch screen is used, and the touch screen has a human-computer interaction interface, can perform functions such as field control printing, real-time data display, parameter configuration, and query, and can meet the requirements of users. The connection between the touch screen and the processor is connected through RD1, TD1 and GND of the RS232 interface.

Referring to fig. 9, an embodiment of the present invention includes a CPU, a power supply, a memory, an analog input, an analog output, a digital input, a digital output, a stepper motor driver, an ethernet communication, and a touch screen.

It should be noted that, in this embodiment, there are 1 ethernet communication interface, 1 RS232/485 communication interface, and there are 44 connection terminals, which are:

power input interface, VDD, GND;

touch screen interface, RD1, TD1, GND;

4 stepping motor driving interfaces, namely X axes X1A, X1B, X2A, X2B, Y axes Y1A, Y1B, Y2A and Y2B, Z axes Z1A, Z1B, Z2A and Z2B, and extruders J1A, J1B, J2A and J2B;

analog input, AI1+, AI1-, AI2+, AI 2-;

analog output, AO1+, AO1-, AO2+, AO 2-;

digital quantity inputs, DI1, DI2, DI3, DI4, DI5, DI6, DI7, DI 8;

digital outputs, DO1, DO2, DO3, DO 4;

the utility model relates to a control flow step of a controller of a 3D network printer;

step S401 begins;

step S402, receiving a remote (such as a communication module)/local (such as a touch screen) printing instruction;

step S403, controlling the operation of a three-axis motor and an extrusion motor of the 3D printing X, Y, Z by adopting a PWM (pulse width modulation) technology;

step S404, calculating step length;

step S405, calculating printing precision and judging whether the printing precision meets the precision requirement; if yes, executing step S406, otherwise executing step S407;

step S406 executes a print job;

step S407, fine-tuning the step size by using a NURBS (non-uniform rational B spline) interpolation algorithm;

wherein, after executing step S402, executing step S408: the temperature of a 3D printer nozzle is collected in real time, and the temperature is controlled to be constant by adopting a PID algorithm.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The control device of the 3D network printer is characterized by comprising a communication module, a camera module, a printing module and a processor; the processor is respectively connected with the communication module, the camera module and the printing module;

2. The control apparatus of the 3D network printer according to claim 1, wherein the printing module includes an X-axis printing component, a Y-axis printing component, a Z-axis printing component, and an extruder printing component; the X-axis printing assembly, the Y-axis printing assembly, the Z-axis printing assembly and the extruder printing assembly are correspondingly connected to an X-dimension control end, a Y-dimension control end, a Z-dimension control end and a material quantity control end of the processor.

3. The control apparatus of the 3D network printer according to claim 2, wherein the X-axis printing component, the Y-axis printing component, the Z-axis printing component each include a stepping motor and a driver; the driver comprises a step angle control input end, a pulse input end, a forward and reverse rotation control input end and a control output end correspondingly connected with the stepping motor;

4. The control device of the 3D network printer according to claim 2, further comprising a temperature control module for controlling the temperature of the extruder; the temperature control module is connected with the processor;

5. The control device of the 3D network printer according to claim 1, further comprising a storage module for storing operation data, the storage module being connected to the processor.

6. The control apparatus of the 3D network printer according to claim 5, wherein the storage module includes a norstack memory for storing programs and important data required for system operation and a SDRAM memory for storing programs and data when the system is operated.

7. The control device of the 3D network printer according to claim 1, further comprising a touch screen, wherein the touch screen is connected to the processor.

8. The control device of the 3D network printer according to claim 1, wherein the control device of the 3D network printer further comprises a power module including a first voltage conversion chip, a second voltage conversion chip, and a third voltage conversion chip;

9. The control device of the 3D network printer according to claim 8, wherein the first voltage conversion chip is LM2596S-5, the input voltage is 12-40V, the output voltage is 5V;

10. The control device of the 3D network printer according to claim 1, wherein the communication module is a communication chip having functions of ethernet communication, RS232/485 communication, or wireless communication.