Active Cooling Fan Duct for Replicator 1 / Duplicator 4 / FlashForge

#There is a new version of this duct available at thing 537918

Anyways in case you decide to print this version here please carefully read the following information completely:

This active cooling duct is designed to work on the following MK7/MK8/MK9 Dual Extruders:

• MakerBot Replicator 1
• FF3DP FlashForge
• CTC Creator Dual
• WanHao Duplicator 4 and Duplicator 4X
  (please read the bottom note if you have one of the last 3 listed printers)
  A version for Replicator 2X is a work in progress at thing:298733
  It is based on the great rolling air flow idea and design of SSW :
  thing:259688
  Because I had trouble to import his model, I had to draw it from scratch with the following main differences:
• redirected air outlets to the tip of the nozzles and to the printed model instead to the nozzle body.
• 2mm less deep (rod to fan front) to allow closed print chamber doors (if they are attached to the outside of the printer) on ABS prints.
• improved usage of the MK7/8 middle trapezoid rod window for higher air rates
• target of the outer air ducts redirected more to the back of the nozzle to almost cover 360 degree of cooling.
  Besides the printed duct and the two distance bolts you need a 24V 40x40x10mm fan and two M3x60 hexagon socket screws (or one of the clips mentioned in UPDATE2 later on) to attach it to your extruder block. In addition you need two normal M3 nuts and two M3x15 countersunk head screws. If you have no front door you can use any screw head you want, and you don't have to read the next sentence. Depending on that and your chosen fan you might need to counterbore the two upper fan holes for a flat finish of the screw heads and your fan front. If your front door is installed inside the window frame (like on Duplicator 4X) and not infront of the frame (like on my modded WanHao Duplicator 4 and CTC printers), you have to modify it to be instaled infront of the frame to gain space for the active cooling.
  UPDATE: low_detail version replaces original stl. Its stl resoltion is rendered to 0.05mm and 5 degree. This should result in a comparable print but requires much less memory to slice.
  UPDATE: Added an additional version ActiveDuctD4_V1_nohole.STL of the duct with removed air way holes which are not required if you install this duct with a clip like the one for Duplictor 4 or CTC/FlashForge
  Important Duplicator 4/FlashForge/CTC note:
  Your installed mighty board is unable to control this fan by default! If you are a soldering expert and aware of the risk of killing your mighty board and losing your warranty, you can solder the missing part Q6 which is a MOS-FET named PSMN7R0-30YL (bought mine on the most famous online auctions platform) and an additional power connector to your mighty board. One of the pictures above show my modified board. Don't blame me, if you fail on doing that!
  Update: Currently ignore ActiveDuctD4_UN.STL, it is a work in progress and was requested by a 3rd party developer to improve the way the cooling duct is attached to the carriage.
  Disclaimer: All trademarks mentioned belong to their respective owners. Modification of your device might result in a full loss of warranty.