This cooling rig dramatically increased my print quality. I can now print overhangs over 45 degrees cleanly and consistently.
As you can see in the CFD simulation, the 3 air ducts channel the air exactly down the middle. This maximizes the cooling of the printed section. This effect can clearly be felt on the actual printer.
Installing the E3D V6 on the Rostock max is easy, but due to its compact design it is hard to fit a coating fan. I've tried about 10 different shroud designs, fans etcetera and discovered that either they did not fit, or else they wouldn't blow in the proper direction. Eventually decided to design my own cooling rig.
I've edited the layerfan shroud design by dreyfusduke to match the E3D V6 using the effector plate either inverted or normal. It cools the prints immediately, maximum fan setting should not exceed 70 nozzle or % temperature will drop dramatically.
The first part by dreyfusduke can be found here:
Print the coating fan shroud 3 times in ABS.
No screws or glue required, slides snugly on the effector plate mounting lips.
Printer: Rostock Max V2
Material: ABS black
Nozzle: 0.4 mm
Layer thickness: 0.25 mm
Printing speed: 40 mm/s
Temperature: 220 C
These components were used:
E3D V6 mount: http://repables.com/r/296/ (printed the pegs 4mm shorter than first)
E3D V6 layer fan shroud by dreyfusduke: http://www.thingiverse.com/thing:614597
40x40x10 radial fans: http://www.aliexpress.com/item/5pcs-Black-Brushless-DC-Cooling-Blower-Fan-2-Wires-4010S-12V-0-15A-40x10mm/32314435053.html