Anycubic I3 Mega - PSU Cover NOCTUA 60x25

thingiverse

### Starting This is part 1 of my airflow concept for the Anycubic I3 case. Part 2: Anycubic I3M - Mainboard Fan NOCTUA 92x14 https://www.thingiverse.com/thing:4441556 Part 3: Anycubic I3M - Double MOSFET 3D-Freunde with NOCTUA 40x10 https://www.thingiverse.com/thing:4441580 I began changing the fans in my Anycubic I3 ... there are many proposals on Thingiverse for PSU covers, holders for mainboard fans, and different fan types. So I selected the most interesting ones and started printing. After opening the Anycubic case to install, I noticed that the PSU printout didn't fit and that the mainboard fan covered the connections of the mainboard. In addition, I also wanted to extend my printer with the MOSFET 3D-Freunde... So I developed and implemented a new approach. ### Aims The three components (PSU fan, mainboard fan, and MOSFET) should work together so that the housing of the Anycubic is ventilated in the best possible way. ### Solution The central mainboard fan draws fresh air from outside and distributes it inside the housing. Two slow-speed 40mm fans continue to conduct airflow, also cooling the MOSFET. The airflow from the PSU fan is then transported outwards via two grille openings in the PSU (chimney effect). See airflow picture. ### Implementation First, I compared and analyzed the performance of the fans in question. Many people use the Scythe SY1012SL12L (100x100x12) fan for their PSU and mainboard projects. It is / was cheap (not available right now ?) and seems to do a good job - but there are better solutions. | Fan | mm | RPM | m3/h | dBA | V | A | MBFT | € | |:---------------------------|:------------|:------|:------|:------|:----|:------|:------------------|:------| | Scythe SY1012SL12L | 100x100x12 | 1000 | 15.2 | 14.5 | 12 | 0.09 | 30000 | ~ 6 | | Noctua NF-A9x14PWM | 92x92x14 | 2200 | 50.5 | 19.9 | 12 | 0.11 | > 150000 | ~ 18 | | + Low Noise Adapt NA-RC7 | | 1700 | 38.1 | 13.5 | | | 6 years warranty | | | Noctua NF-A6x25FLX | 60x60x25 | 3000 | 29.2 | 19.3 | 12 | 0.11 | > 150000 | ~ 18 | | + Low Noise Adapt NA-RC10 | | 1700 | 23.5 | 14.5 | | | 6 years warranty | | | + Low Noise Adapt NA-RC12 | | 1600 | 16.7 | 8.2 | | | | | - The Noctua NF-A9x14PWM (using the LNA-adapter NA-RC7 from the kit) delivers twice the air volume at the same loudness as the Scythe - the MBFT is three times as high. - The Noctua NF-A6x25FLX (using the LNA-adapter NA-RC10 from the kit) delivers one third more air volume at the same loudness as the Scythe - the MBFT is three times as high. So, I used the (expensive) Noctua kits because of the higher air volume and the better MBFT. ### Installation Have a look at the pictures - my PSU version had VERY little room for a replacement fan (upright coil and condensators) - I've printed SO MANY test covers until then all fit!! I used a Noctua NF-A6x25FLX with the Low Noise Adapt NA-RC10. Perhaps the new housing should be a little enlarged for the fan cable feed. The test prints were made with PLA - the final print with ABS filament. A little advice ... check your PSU before start printing ... I know what I'm talking about ... ;-) The 'Anycubic I3M - Vibration Damper Feet' allow additional air intake: https://www.thingiverse.com/thing:4440488