DIY high power UV cure box

thingiverse

Hi everyone, I decided to create my own UV cure box for my Wanhao Duplicator 7 printer. This project uses two 30W LEDs to quickly post-cure parts from a resin-based 3D printer. The cure box is controlled by an Arduino that automates the curing process, allowing you to set a time and have it shut off when complete. Although not necessary, you could simply mount the LEDs and drivers manually and turn them on/off as needed. To share this project with others, I'm uploading the files and code used, so feel free to modify or recreate as desired. Please note that this project is still in development, and there may be some mistakes or tolerances that need adjustment for your specific printer. Additionally, there's a known bug in the code causing the piezo buzzer to beep twice if you end the cure early. Here are the parts used: Box: I found a suitable "dragon 10L storage box" at my local store (Wilko in the UK). This box is large enough to fit multiple parts or another container for water curing. To enhance reflection and reduce light leakage, I applied reflective tape to the inner walls of the box. https://www.ebay.co.uk/itm/Hydroponics-Mylar-Sheet-Alu-Tape-Reflective-Heat-Proof-Self-Adhesive-Grow-Room-/262180134639?hash=item3d0b275eef http://www.wilko.com/plastic-storage/dragon-storage-box-10-litre/invt/0447636 Hardware: All mounting is done using M3-sized hex head bolts/screws and nuts. I used various lengths to keep the setup organized. LEDs: Two high-power 30W LEDs from Aliexpress were used in this project. These are a significant investment, but it's worth spending on decent-quality LEDs, as some options on Ebay or Aliexpress can be of poor quality. A constant current driver is also required for the LEDs; I recommend the one linked below: https://www.aliexpress.com/item/UV-Purple-LED-Ultraviolet-Bulbs-Lamp-Chips-365nm-375nm-380nm-385nm-395nm-400nm-405nm-3W-5W/32836018477.html?spm=a2g0s.9042311.0.0.pnRLq7 https://www.ebay.co.uk/itm/DC-Boost-Step-up-Converter-Constant-Current-Power-Supply-LED-Driver-250W-10A/252500569378?epid=867291999&hash=item3aca34ed22:g:Xa0AAOSw2MJZeVZj Cooling: To prevent overheating, I used a cheap CPU cooler from Amazon. A spare 70mm fan was also employed to cool the electronics; however, this might not be necessary. Heatsink: B00006B8CO (TX3, style: 7/370) Other Electronics: An Arduino Nano, 128x64 0.96" I2C OLED, FDD6670A MOSFET, and 4 tactile push buttons were used in this project. These components can be easily found on Ebay, except for the MOSFET; you may need to substitute it with a different option. The circuit uses 12V power for the Arduino, which controls the MOSFET to switch the 12V supply to the boost converter and fans. I won't provide detailed explanations for the circuit as it requires experience with Arduino/electronics.