Octoptint enclosure control box for Ender 3

thingiverse

This is a detailed guide on how to modify and extend an OctoPrint setup, which is a popular open-source firmware for 3D printers. The guide covers various aspects of customization, including hardware modifications, plugin installations, and scripting. **Hardware Modifications:** 1. **Adding a Thyristor:** The author uses a thyristor instead of a relay to control the power supply. This is done to prevent the power supply from being left on due to stuck relays. 2. **Using External LEDs:** The guide explains how to use external LEDs as SD ACT LEDs, which is a simple way to make this work. **Plugin Installations:** 1. **Cancel Object Plugin:** The author uses the Cancel Object plugin, but later replaces it with the Exclude Region plugin due to issues with the former. 2. **Enclosure Plugin:** The guide explains how to control the Enclosure Plugin from other devices using URLs. 3. **PSU Control Plugin:** The author uses the PSU Control plugin and provides a shell line to power ON the PSU. **Scripting:** 1. **Pause to Change Filament Script:** The guide includes a script for pausing the print job to change filament, which is a common requirement in 3D printing. 2. **LED and Relay Control Scripts:** The author provides scripts for controlling LEDs and relays using OctoPrint's API. **Other Customizations:** 1. **LCD Backlight Control:** The guide explains how to control the LCD backlight by adding an optocoupler in the line. 2. **Preventing Printer Power from Pi:** To prevent the printer from getting power from the Pi, the author simply puts a strip of electrical tape inside the USB plug of the cable that connects to the printer. **Reference Model:** The guide uses the Raspberry Pi 3B model by Kevin Schneider as a reference for size comparisons. The Fusion 360 source is also included for those interested in creating their own custom enclosure. Overall, this guide provides a comprehensive overview of how to customize and extend an OctoPrint setup, covering various aspects from hardware modifications to plugin installations and scripting.