After some tests with the beautiful D6 blower fan upgrade by _ZincBoy_ (http://www.thingiverse.com/thing:1666096) on my Zortrax M200, I decided to remix his design to better fit my printer.
I think _ZincBoy_ has tilted the fan for some reason, perhaps to improve the airflow. But after a test with the blower positioned parallel to the heat sink I did not detect evaluable differences. I don’t own the D6, but the original shroud doesn’t fully exploit the cooling fins, then I increased the lower opening to expand the area hit by the air flow.
The radial fan to be used is the BFB0412HHA-A that you can order from digikey, mouser etc.
The fan is locked in place with #3 wood screws.
You need also a 12V regulator because the M200 send a voltage spike which destroys the fan during startup and also because the operating voltage is beyond the specification of the BFB0412HHA-A.
I’ve opted for the Pololu D24V5F12 (https://www.pololu.com/product/2846), a 12V/500mA switching step-down well-known by the fpv racing drones users. It is located between the shroud and the fan, in a dedicated housing. Its wiring should not be a problem.
A beefier version added called V2.
V3 added with removable fan cable.
Final version called Z-Vent added (Z-VENT_upper_V2.stl).
– longer version which channeling the air also in the first groove
– the mesh is tilted, which results in greater structural strength and ease of printing
– added a flap to make it easier to turn the airflow to the left
– Z-VENT logo added