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160 lines
9.5 KiB
Markdown
160 lines
9.5 KiB
Markdown
# Solder Plate Controller with Detachable Hotplate
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This repository contains the source code and design files for a Solder Plate Controller and detachable hotplate. The processor used is the ATmega4809 and is based on the work of DerSpatz. https://github.com/DerSpatz/PCB-reflow-solder-heat-plate
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## Features
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- Precise temperature control for soldering SMD components. with support of **up to 6 thermistors**.
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- Cheap and widely available MCU- Atmega4809 and low BOM cost
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- Custom PCB design with 2 versions: single area control (Completed) and 4 independent heating zones control(In works)
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- Detacabale hotplate allows for use of new heatplate designs including larger ones
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- Programming via USB
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- PlatformIO integration for streamlined development.
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- wifi via esp8266-12f module (with wifi version - In Development).
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- Based on Reflow Hotplate by DerSpatz with some improvements
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- Oled for menu navigation, debugging, and thermistor info
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- TFT for reflow profile target and actual temp
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- 4 buttons for menu navigation
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- Current sense IC for current monitoring
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- 3 indicator LED's. They work for both menu and REFLOW profiles (blinking while on the current stage and solid once the profile stage is complete).
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- Buzzer for complete notification
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- Buck- Converter for input voltage, allowing up to 24V in
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- 24V+ rated input voltage stage components allowing up to 24V to be used (Depending on powersupply trip option the "max" pwm needs to be lowered to not trip power suppply safety)
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- Optional fan for cooling stage (not yet installed)
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= Included are files for a case and a guard for the detachable plate terminal guard.
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## Getting Started
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### Prerequisites
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- PlatformIO Core or PlatformIO IDE.
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- ATmega4809 microcontroller and all the BOM components
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- Basic soldering tools and electronic assembly skills.
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- Access to a PCB manufacturing service or soldering equipment (solder paste, hot air gun, tweezers)
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- Some basic technical skills
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### Hardware Setup
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*** MAKE SURE YOU ORDER THE HOTPLATE IN BLACK. IT WILL NOT DISCOLOR AND HOLDS UP A LOT BETTER TO HEAT CYCLES ***
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1. **PCB Fabrication:** Fabricate the PCB using the provided gerber files. You can use these to order the naked PCB from services like JLCPCB.
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2. **Component Assembly:** Solder the components onto the PCB as per the schematic or choose a SMT assembly service like the ones from JLCPCB
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3. **Power Supply Connection:** Choose a suitable power supply. 12V 5A tested, 24v 5A compatible. Use of more then 5A requires a appropriate FUSE to be chosen and solder on place of F1
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### Preparing the ATmega4809
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Before programming the ATmega4809, it needs to be flashed with a default bootloader.
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1. **Bootloader Flashing:**
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Same process as DerSpatz Solder plate with some changes to the bootloader settingffs:
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The MCU can be programmed with JTAG2UPDI (https://github.com/ElTangas/jtag2updi). For programming, you need an Arduino with ATMEGA328p (Uno or Nano), some wires, a 4.7k resistor and a 10µF capacitor or 120 Ohm resistor to disable the auto-reset.
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JCM from the Discord explained the process pretty good:
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- Download/Clone this project: https://github.com/ElTangas/jtag2updi and rename the folder "source" to "jtag2updi" (otherwise the Arduino IDE won't like it)
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- Open jtag2updi/jtag2updi.ino in your Arduino IDE
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- Configure the flasher options for your Arduino Nano and flash it
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- Connect D6 of your Arduino Nano over the 4.7kOhm resistor to the UPDI pin of the board and 5V to 5V and GND to 0V
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- Add the MegaCoreX hardware package to the Ardunio IDE (see https://github.com/MCUdude/MegaCoreX#how-to-install)
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- Select the options for the programmer **(Board: ATmega4809, Clock: Internal 16 MHz, BOD: 2.6V or 2.7V, EEPROM: retained, Pinout: 48 pin standard, Reset pin: Reset, Bootloader:Optiboot:Uart0(Defualt pins))** and select the port of your Ardunio Nano as Port
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- Make sure the programmer selected is SerialUPDI or JTAG2UPDI
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- Select Burn Bootloader and see if it runs through
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2. **MicroUSB Programming And Firmware Upload:**
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- **Using Platformio:**
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1. After flashing the bootloader, the ATmega4809 can be programmed via the microUSB connection using PlatformIO by building the project and upload
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- **Using AVRDude:**
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1. Folow instructions on : https://github.com/ElTangas/jtag2updi?tab=readme-ov-file#using-with-avrdude
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2. Example : avrdude -c jtag2updi -P com7 -p t1614
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- **Using AVRDUDESS (AVRDUDE with GUI interface) -- This section many not be completley finished:**
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1. Download and install AVRDUDE https://download-mirror.savannah.gnu.org/releases/avrdude/
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2. Download AVRDUDESS : https://github.com/ZakKemble/AVRDUDESS
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3. Choose the programmer as arduino
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4. Choose the MCU as ATmega4809
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5. Choose the COMPORT where the Solder Plate Controller is connected to
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6. Choose the Flash binary in the programming directory -> set to Write
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7. Choose "Write" on the Flash option and press "Go"
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3. **Setting up the controller**
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1. Order 100K NTC Glass thermistors Use for dev was : 100K Ohm Resistor NTC 3950-> https://www.aliexpress.com/item/32862228715.html?spm=a2g0o.order_list.order_list_main.11.1f0a1802Lw8YGL
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2. Using either the potentiometer or soldering the resistor beside it choose the resistor reference value (2.5Kohm is standard)
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3. You can modify the thermistor settings in Global.ccp file, it is all explained in there
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4. Attach the sensors to the hotplate using High temp Kapton Tape
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5. Reccomended is 3 sensors on the bottom middle of plate all with 3 different refernece resistor values for accuracy across all temperature ranges and 1 thermistor held by a pair of helping hangs placed so the head touches somewhere on the PCB to be refllowed
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By default this is set as thermistor 1:
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6. Link to 2.0 inch TFT -> https://www.aliexpress.com/item/1005002363748586.html?spm=a2g0o.order_list.order_list_main.5.165d1802Amz1I7 (8 pin version) -> 7 Pin version can also be used
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7. Link to 0.96 OLED -> https://www.aliexpress.com/item/32957309383.html?spm=a2g0o.order_list.order_list_main.17.662c1802iqqiSE (Choose OLD design SSD1306)
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*** IMPORTANT: Thermistors 1 is ONLY available on the hotplate. Thermistor 6 is only available on the controller via connector 5**
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You can solder the thermistors directly on the hotplatte or use them with the connector. Please update the thermistor settings to the way you have them set-up.
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Here are the defualt thermistor settings, The assume that the thermistors are soldered on the plate for 1,2,3:
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Thermistors 6 on the connector number 5, touching the PCB to be soldered.
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Thermistor thermistor1(THERMISTOR1_PIN, 2545, ThermistorZ_Placement::ON_PCB, ThermistorXY_Placement::MIDDLE); // -> 2545ohm set refrence -> This thermistor is set directly touching the PCB to be soldered
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Thermistor thermistor2(THERMISTOR2_PIN, 9100, ThermistorZ_Placement::BOTTOM, ThermistorXY_Placement::MIDDLE_LOW_TEMP); //- > 9100 ohm set refrence Best accuracy around 90C -> This thermistor is used for the lower end of the temp scale
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Thermistor thermistor3(THERMISTOR3_PIN, 2040, ThermistorZ_Placement::BOTTOM, ThermistorXY_Placement::MIDDLE); // -> 2.5Kohm best middleground
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Thermistor thermistor4(THERMISTOR4_PIN, 564, ThermistorZ_Placement::BOTTOM, ThermistorXY_Placement::MIDDLE_HIGH_TEMP); //-> 564Kohm set refrence // 564R reference = Best accuracy around 210C
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If you wish to only use the connectors use 2,3,4 and update the Globals .cpp to match your settings
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The set resistence is measured between a GND point anywhere on the board and the LEFT pin of the connector with the thermistor UNPLUGGED and the MODULE POWERED OFF!!!!
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you can measure and set those to the preset values or modify the values in globals.ccp to match your thermistors.
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If a thermistor is set to bottom a automatic scaling factor for the difference difference in plate temp is set that was aquired through lots of datalogging and computations
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If a thermistor is set to SIDE there is no scaling factor and will throw off the reading acorss the center of the plate (overall will be lower)
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When using the Thermistor with placement "ON_PCB" That thermistor has a weighting factor of 10 and has the biggest effect on the read temperature.
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The normal weighting factor is between 0.1 and 1.5 for the others.
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### Software Installation
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1. **Clone the Repository:**
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```bash
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git clone https://github.com/arwidcool/Solder-Plate
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cd Solder-Plate
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2. **Import in vscode**
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To open a PlatformIO project in VSCode with the PlatformIO extension, follow these steps:
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1. Launch VSCode and ensure that you have the PlatformIO extension installed. If not, you can install it from the VSCode marketplace.
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2. Open the VSCode command palette by pressing Ctrl+Shift+P (Windows/Linux) or Cmd+Shift+P (Mac).
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3. In the command palette, type "PlatformIO: Open" and select the "PlatformIO: Open" command from the list.
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4. Navigate to the root folder of your PlatformIO project using the file explorer that appears.
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5. Select the folder and click "Open" to open the PlatformIO project in VSCode.
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### Usage
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Power On: Connect the controller with a 12V 5A(Tested working) or 24V 5A PSU (Untested)
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Set Profile: Navigate the menu and choose the desired reflow profile
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Start Soldering: Place your PCB and components on the hotplate and start the profile
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### Customization
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Feel free to modify the firmware and PCB design to suit your specific needs.
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### Contributing
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Contributions are welcome. Please follow standard procedures for contributing to open-source projects.
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