This device controls a pizza oven to produce temperature ramps to use it as a reflow oven. Therefore several simple modifications are done. The builtin control is disconnected and the heater is controlled through an opto-SSR (optocoupled solid state relay).
This reflow oven can therefore be used to produce a variety of temperature profiles - not only for reflow soldering.
| The reflow oven | The Inside of the reflow oven |
|---|---|
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To populate PCBs width components you could either use a soldering iron and solder each component by hand or you can use a reflow oven. To use a reflow oven you put soldering paste onto the pads and put your components on top. The you bake it in an oven - a reflow oven. The special functionality of a reflow oven is that you can produce temperature profiles. This is to solder the components as gently as possible but also guarantee good solder joints.
- Arduino IDE
- Adafruit_GFX library (V1.5.0, newer libraries generate error according textsize)
- SWTFT Library
- TouchScreen Library (included in the source code for, used for ST7781 driver)
- TftSpfd5408 Library (if SPFD5408 is used, install in Arduino IDE)
- MAX6675 Library
- TimerOne Library
- Visual Studio to have a comfortable IDE
- Visual Micro to integrate Arduino IDE in Visual Studio
The hardware consists of:
- Pizza oven Clatronic MPO 3520
- Arduino Uno
- 2.4" 240x320 TFT display shield with integrated touch (search for "2.4 TFT" and check for ST7781 or SPFD5408 driver chip)
- Opto-SSR S202S02 / S202SE2
- MAX6675 thermocouple module with thermocouple sensor
Depending on the display used you have to uncomment the right definition (USE_ST7781 or USE_SPFD5408) in the file ReflowOven.h
or extend the code in Display.cpp to use the right driver class for the tft object.
The housing for the Arduino Uno and the TFT-Touch-Screen is printed using a 3D-Printer and mounted with a piece of aluminium to the oven.
Marco Graf
Roman Scheuss
Roman Scheuss built this device and programmed the first version of the arduino code.