[Better Ender 3] Reverse-Flow "Blowhole" Cover - BLTouch Compatible

thingiverse

This a themed mainboard cover to match the rest of the Better Ender 3 series of parts I've made. It's built to accommodate the higher height of the BLTouch chips and cabling. It also mounts the fan backward so air exhausts out the front of the printer in a "blowhole" type airflow from the top of the case where the hot air is. There are plenty of slots and holes for air to enter the enclosure, even if you have drawers on the right side of the Ender 3. The airflow coming out in this design is many times higher than what it was going in on the stock or vented designs I used previously. This uses existing hardware for the cover and fan. The rear screw for the cover will need a little pressure to attach in a solid way, but I didn't want to weaken the structure. Printed with ABS and 20% infill with 0.2mm layers. You'll need supports everywhere, and a needle-nose pliers to rip the supports out of the exhaust tube. Printing zigzag worked for me. The holes on the front are big on purpose so you can get at the supports from both directions.