Ender 3 Stovetop Firestop Bracket

thingiverse

I wanted more peace of mind when leaving my printer running for hours or overnight without worrying about it catching fire. I've seen the devastating aftermath of printer fires, so when I noticed my XT60 power connector on the Ender 3 was overheating significantly, I knew I needed to take extra precautions beyond just focusing on common areas where fires occur. I researched various enclosure materials like sheetrock and cement board, which have a certain level of fire resistance, but then realized that I always want to mount my filament spool and electronics outside. These materials would essentially act as a chimney or wick for a fire that started inside the box, making it even more hazardous. I continued researching and discovered the Stovetop Firestop, which is designed to smother stove fires by depriving them of oxygen. While this solution may not be foolproof, it seems to need to be in direct contact with flames before triggering. I haven't tested its parameters yet, but it appears to be effective against messy stovetop fires. My next challenge was figuring out how to mount the firestop cannister securely and strategically. According to my research, wiring and power supply are the most likely sources of fire, so I designed a bracket that centers the cannister over the midpoint between the XT60 connector and the power supply. This bracket can fit on any 2020 extrusion, making it versatile enough for various printer configurations.