Prusa i3 MK3s optimized airflow and Pinda securing

thingiverse

I'm using a combination of the original Prusa parts and a new part to optimize my printer for large area prints. I've found that sometimes warping occurs when printing with ABS, so I've made some changes to prevent air from blowing onto the print bed through the hotend. Since I operate my printer in a housing, I can exclude air ventilation from another direction, which has helped reduce warping issues. I built a new part that attaches to the left of the hot end fan, ensuring no return air reaches the print bed. I also added a guide for outgoing air on the exiting side, which encloses the PINDA probe slightly. To prevent the screw from loosening over time, I designed a self-locking nut on the back of the part. This should provide extra security for the PINDA probe. For those using ABS, applying a small amount of acetone to the small bars will help reinforce them after drying (see brush). If you use a countersunk screw for rear fastening, it won't hit the shaft, and the stop on the shaft may be more defined than that on the rear cable tie. I've been using this solution for many months without issues, so I'm sharing it with you today in hopes it will also help you.