Automating UV Light Control for Your Printer: A Comprehensive Guide

In the world of DIY UV printers, efficiency and automation are key concerns. Many hobbyists and professionals alike are seeking ways to optimize their UV curing process, and one way to do this is by automating the UV light. In this tech overview, we will explore various methods and components to achieve the goal of turning on a UV light when a printing job is initiated and turning it off once the job is completed. Whether you're using an all-in-one board or a customized setup, we've got you covered.

Microswitch: The Simplest Solution

The simplest solution involves mounting a microswitch so that the UV light activates when the print head moves away from the capping station. This method ensures that the UV light is only on during the printing process, eliminating the need for complex coding or additional components. It's a cost-effective and efficient way to automate UV curing.

Using a Relay for LED Control

For those working with LEDs that require a higher current, using a relay is recommended. A relay acts as an electrical switch that can handle higher loads than a typical microswitch. This approach provides a level of electrical isolation, ensuring the safety and longevity of your UV curing setup. You can easily control the relay with the microswitch, creating a reliable on/off mechanism for your UV light.

Arduino and MOSFET: Precision and Flexibility

For those looking for precise control and added features, connecting the microswitch to an Arduino and using a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) to regulate the UV light is a viable option. This approach allows for fine-grained control of the UV light's behavior, including the ability to introduce a time delay before turning it off. For instance, you can set a brief delay to ensure the last bit of printing is properly cured. This method offers versatility and customization options, making it a popular choice among DIY enthusiasts.

Adding Code for Automation

To integrate these solutions into your printer's code, define the pin for the switch and the output pin for the MOSFET. Establish a clear logic for when the UV light should be on or off. Additionally, include code segments for other scenarios, such as when the platen is ejected, to further enhance automation and user-friendliness.

Hardware Connections on the AIO Board

If you're using an all-in-one (AIO) board, as mentioned earlier, finding the right pins and connections can be a bit challenging. There are available connection points on the AIO board, including the unused pause on the right side and the RST, RX, TX pins in the LCD header on the upper left. Exploring these connections can help you seamlessly integrate your UV light control system into your AIO board setup.

Automating the control of your UV light for your printer is a worthwhile endeavor, as it can improve efficiency and reduce the risk of errors during the curing process. Whether you opt for the simplicity of a microswitch, the reliability of a relay, or the precision of an Arduino and MOSFET setup, there are solutions available to suit your needs. Additionally, integrating these solutions into your printer's code and identifying the right hardware connections on your AIO board will ensure a seamless and efficient UV curing process.

For more tech-related insights and DIY projects, be sure to follow our YouTube channel BCH Technologies and explore our tech blog. If you're in the Greensboro, North Carolina area, you can also visit us locally for expert assistance and a wide range of technical solutions.