3D printer six-axis control board

1. Product introduction:

3D printer six-axis control board, using STM32-driven 6-axis control board, supports up to 6-way stepper motor drive, and can be directly plugged into portable wifi as a host computer. Provide rich interfaces such as: 4-way limit interface, 1-way leveling interface, 2-way controllable fan interface, 1-way fixed fan interface, etc. The hot end and hot bed interface adopt XT30PB (2+2), which integrates the temperature sensor , the power input interface adopts XT30 interface, onboard SL2.1A chip, provides 4 USB HUBs for portable WIFI, of which 1 is connected to STM32 serial port, 1 is connected to TF card, 2 USB ports are connected to external hardware such as camera, TF card can be used With a capacity of 32GB, you can configure the portable wifi to automatically mount it. Because the TF card is not for the STM32, the firmware can only use klipper. The purpose of this version was to use the portable wifi. STM32 is not very familiar with it, and some legacy A small problem. I read the document before and designed an automatic restart circuit, but there have been problems, so I changed it to a button to restart. To restart the board in klipper, you need to manually press the restart button. Generally, it will be used when adjusting the configuration, and it will not be used for stable operation. Until restarting, you can directly power off and on again, so this version is free and open source, I hope you can give me more advice.

2. Application scenarios:

1. As the control board of 3D printer, reduce the cost of DIY 3D printer;

2. The firmware uses open-source klipper, and the host computer uses portable wifi, directly plugged into the control board, which is cheap and easy to use.

3. It has 2 external USB ports, which can be connected to a camera to monitor the printing situation, and can be connected to other control boards to expand the drive shaft.

3. Product overview:

1. The main control of this project uses the STM32F103C6T6 module. You can use the C8T6 if you don’t need money, and the C6T6 is economical;

2. On-board portable wifi plug-in interface and on-board USB HUB chip make portable wifi more scalable;

3. The control board uses 12V power input. The maximum power of the DYU SPA printer is 160W, and the power is about 70W when printing. Please choose a power supply above 200W.

4. A4988 can be used for motor drive, TMC2209 can be used for noise reduction, pay attention to subdivision selection jumper.

5. There is a temperature sensor on the board to detect the temperature of the main board in real time. In addition, there is a 1-way warehouse temperature sensor interface, which can be used when the warehouse is closed.

6. Use an optocoupler to isolate the output control of the hot bed and the hot end to prevent damage to the chip due to failure.

6. Capacitors and resistors are all packaged in 0805. The pads are large, which is convenient for soldering. Heating tables, air guns, and soldering iron heads are all available. Only the two chips with dense pins, STM32 and GL823K, are more difficult to solder, because the devices used are all It is relatively large, so the PCB size is 100mmX100mm, and the maximum limit for free printing.

4. Product parameters:

1. Input voltage: DC12V;

2. Support 6 motor drives;

3. 1 hot end output, 1 hot bed output, 4 limit, 1 leveling, 3 temperature sensor, 1 onboard temperature sensor;

4. 1-way USB input, 2-way USB output, 1-way TF card;

5. 12V, 5V, 3.3V power status indicators;

6. Working temperature -40 degrees to +70 degrees;

7. Working humidity 40% ~ 80%RH;

8. PCB size: 100mmX100mm

9. PCB specifications: double-layer board, top patch.

3D printer six-axis control board hardware project Figure 1

5. Instructions for use

1. PCB welding

2. Firmware burning

3. Configuration editing

4. Connecting lines

5. Calibrate the printer

Note: The attachment contains a detailed tutorial

6. Remarks:

1. The cost of this control board is about 35 yuan, A4988 drives about 4 pieces, TMC2209 drives about 12 pieces, and the 8G version bought for 12 pieces on the portable wifi uses 4 axes according to the configuration of Dayu SPA, and 4 pieces of TMC2209 are used for the drive. The total price is around 95, and the upper and lower computers are all done, which can be said to be very cost-effective.

2. Capacitance and resistance LED packages are all 0805. If there is no heating table, it is easy to solder with an electric soldering iron. The only trouble is that the STM32 and GL823K are two chips with relatively dense pins. It is necessary to carefully check whether there is any false soldering and tin connection.

3. The input power supply uses 12V, so the hot end and the hot bed should also use 12V. The combined power of the hot bed and hot end is about 150W, and the power supply is recommended to use more than 200W.

4. Both firmware flashing and configuration debugging need to use the linux system, and it will be easier to get started if you are familiar with linux operations.

5. The attachment contains a complete set of information on the DYU SPA printer, and the assembly of the 3D printer requires a certain amount of hands-on ability.

6. The attachments include instructions for use, reference links for purchase of some components and accessories, configuration files, interface number correspondence table, and a complete set of data for DYU printer SPA