ANYCUBIC I3 MEGA silent hotend housing + circular turbofan duct mod

thingiverse

I was not particularly fond of the native neighborhood of the Anycubic i3 MEGA hotend. The air ducts of the fans were quite unattractive and made a significant amount of noise when the air passed through them. I decided to get rid of the metal casing and make some adjustments. To accomplish this modification, you will need: + 4 M3 nuts + 4 M3 x 12..16 screws + A turbofan, for example: https://www.aliexpress.com/item/5015-12V-Cooling-Turbo-Fan-Brushless-3D-Printer-Parts-2Pin-For-Makerbot-Reprap-Prusa-i3-DC/32815755495.html or https://www.aliexpress.com/item/DC-12V-50mm-Blow-Radial-Cooling-Fan-Hotend-Extruder-Cooler-For-RepRap-3D-Printer/32811709677.html + 2 screws for attaching it (such as used to mount a fan in a computer) The casing is assembled using filament pieces that need to be inserted into the holes. These can be fixed with cyanoacrylate. That's all. By reducing the inertia of the head and improving cooling in the print zone, I am now able to print at higher speeds. 02.16.2018 UPDATE: I added a grille front. When printing ABS it blows too much air down the hotend and causes the print to delaminate. The grille helps a little. 03.01.2018 UPDATE: Please use this firmware mod https://www.thingiverse.com/thing:2732424 to have +12V at FAN0 port or adjust output voltage of main power unit with VR to 13.5 volts. Peace for everyone!