Using a fan to print aggressively acute angles.

thingiverse

This fan guard is essential for safety while holding a small fan. The main purpose of this model is to demonstrate an effective method for printing overhangs with acute angles, without the use of supports. I noticed that blowing air from a small fan onto the hot ABS during printing can produce quality prints with 15-degree angle overhangs. To achieve this, I purchased a small fan and a wall wart power supply from Radio Shack. The displayed model is a 5x5x10mm cube with a 1x1x10mm arm at a 15-degree angle, printed with a .27mm layer height and 80mm/s feed rate. This technique tests the limits of print quality under challenging conditions. Additionally, I bought a female plug for connecting the fan wires to the wall wart's plug. However, this modification requires your attention during the printing process.