Figure 1. Inner chamber of the prototype box
Figure 2. Solidworks model of the final box.
Figure 3. Completed UV-9000 chamber
This is a blog about UV curing and temperature chamber that myself and two other students made at Mira Costa College, Oceanside, CA in Fall of 2017. This is a final project for DESN 204 class at the college. What is a UV Curing & Temperature Chamber? UV curing is needed to cure adhesives, paint, 3D printed material, PCB photolithography, and few other applications (such as curing nail polish, etc). We have made a prototype box for UV curing and temperature chamber. The UV curing is done by UV light (405nm wavelength). The UV light is generated by 18 UV LEDs. Each of the UV LED output about 1.5W of 405nm wavelength light (in UV range). The chamber inner dimension is roughly about 8"X8"X10" so that it can accommodate even the largest printed object from Formlabs Form2 SLA 3D printer. The inner chamber, has a turntable that is powered by an AC motor turning at 6 rpm. The temperature inside the chamber is raised by turning on a 100W heater bulb. There is a fan inside the chamber that pulls air through the heater bulb,and circulates the air inside the chamber. A temperature sensor reads the air temperature, if the target temperature is reached, the program/arduino turns off the heater bulb, if temperature falls below the target temperature, the program/arduino turns on the heater. There are 2 other fans used in the chamber, to cool down the electronics, AC motor, and LEDs. The LEDs have heatsink on each of LED, so that the LEDs will have long life (expect > 20000 hours life). The LEDs like to see constant current at about 600mA. So we use PicoBuck regulator from Sparkfun. The chamber has a knob that is connected to a rotary encoder, user turns the knob or push the knob to enter chamber operating parameters. User can program bake time, bake temperature, cure time, and cure power (% power). There is a Nokia LCD 84X84 matrix display that shows the chamber status, as well as programming parameters.
- Arduino Code and Library are here
- Bill of Material (BOM) is located here
- Mechanical Design of UV-9000 Chamber (solidworks files, PDF files)
- Movie of the prototype box is here
- Various pictures of prototype box can be seen here
- Pictures of final UV-9000 chamber
Email me for questions: juswanto@gmail.com
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