Multifunctional rotary soldering station

        The idea of ​​building this soldering station at first was because I had to rotate the PCB all the time when applying solder paste and attaching components. After attaching, I had to move it to the heating table for soldering (two times it fell without clamping it properly when moving it off after soldering). The components on the ground were scattered all over the place, resulting in failure of the work), so the idea of ​​​​concentrating all these processes on one piece of equipment came up. And the soldering station is very popular with everyone. This time, ESP32 is used as the main control and Marin firmware is used to make the reflow Teppanyaki. The soldering station is equipped with an OLED interactive screen, lighting, fan, and soldering iron. The Marin firmware is very powerful and has been used by me. Basically all the 3D printing-based IOs in this project have been introduced. If you have other ideas, you can reuse them, such as changing the display bracket to automatically retract, Automatic lighting control and more! ! The SD card slot is also reserved for later reading and writing Gcode to perform semi-automatic operation of the heating table.

       The rotating part of this soldering station only uses the IO of the X-axis. The working size of the The station can also be controlled through the UI interface. The connection methods include ap mode and client mode. You can usually put a glass of water in advance and lie on the bed when you want to drink water. It is good to use your mobile phone to control the heating of water! !

       This production is just my personal idea. Please give me some advice if I am not doing it right or making mistakes! ! Interested experts can also participate in improvements, and try to open source the best to friends in need. There are still many areas for improvement in this version. If you like it, you can give me more suggestions in the comment area to give me some direction and motivation for improvement! ! ! Hardware production requires a certain degree of hands-on ability. Later, we will record some production tutorials according to everyone's needs!

       Friends who want to do it can wait and see. I want to change the layout so that I can add a shell to the base plate later! Also, the power supply needs to be about 12V30A because if the heating table and soldering iron are turned on at the same time, the current will be more than 20A.

Next, I will post some pictures of the actual objects: the front side of the storage form picture.

Storage form diagram front

Use expansion diagram

The optocoupler in the circuit diagram is used to isolate and increase the driving voltage. Q9 and Q12 are 8050 and 8550 triodes respectively to form a totem pole driving circuit. The driving current is increased and the push-pull output of the two tubes makes the switch response faster. Two high-power MOS tubes are also connected in parallel to shunt the tubes to reduce heat generation and extend their service life.

The following circuit is mainly the fan drive circuit and the forward and reverse switch. Please note that the switch must use the XKB7070-Z self-locking switch. The pin definitions of other models are different!

Production process

Equipment materials

Apply solder paste

Paste components

Teppanyaki welding

The effect after welding is completed and cleaned

The effect after welding straight plug-in.

When making conductive pillars, there was originally no outer ring of copper foil but conductive conductivity through springs inside. During use, I found that the spring was too thin and turned into a heating wire, so I added a copper piece.

The four inner burning pins are the conductive pillars of the thermistor, and the outer ones are the heating stage power supply conductive pillars.

Plastic sheets are added between the conductive pillars for insulation.

Parts required for heating plate

The heating plate is assembled and coated with conductive paste to increase conductivity and provide lubrication.

In the picture, you can see that there is asbestos between the slip ring plate and the aluminum substrate to improve the heating performance of the heating plate and shorten the heating time. An aluminum plate is fixed on the stepper motor to fix the display screen, lights, and fans on the rail.

Bracket assembly

This is a diesel electric heater that can be heated to more than 1,000 degrees in about 2 seconds. If used as a soldering iron, it may last a lifetime. In the picture, the outer casing is removed by polishing.

Secure the network cable to the two poles of the glow plug.

To fix the 936 soldering iron head (the inner hole of the soldering iron head must be enlarged to M5), the black shell must also be expanded to M5.5, and the screw thread must be drilled to M2.5 and M3 tapped to fix the heating core.

350 degree thermistor (there is an option in the firmware that supports 500K 450 degree thermistor but I couldn’t find the actual one)

Fix the thermistor and put on the yellow wax tube for insulation.

Welding aviation plug

As shown in the picture after the soldering iron part is completed. In the later stage of the soldering iron part, the sensor will be moved to the vicinity of the soldering iron tip (which can more accurately transmit the temperature of the soldering iron tip). The temperature sensor may be changed to a thermocouple. Also, can anyone who has used MAX6675 or MAX31865 in a 3D printer (Marin firmware) share how to enable it?

Physical display.

The firmware exceeds 50M and cannot be uploaded as attachments, so it is uploaded to Baidu Netdisk. The modified source code link: https://pan.baidu.com/s/12xLCP53RDkO5lgIaL7GWGw 

Extraction code: Get it from aniu if you need it. The UI on the web page is also uploaded in the attachment and supports Chinese. Also, when compiling, first comment out the OLED statement in the picture, compile it once and pass it, then open the comment and compile to enable the OLED screen. The compiled bin file is also uploaded in the attachment.

This is the end of the introduction to the actual effect. You can move on to watch the video! ! ! Thanks! ! !

I hope to get more advice from the big guys for later improvements! !

Below is a slightly more detailed introduction video from Station B! ! Dear viewers, please move your hard-working little hands and give a thumbs up, thank you! ! ! !

Station B portal