Annular Cooling for Ultimaker
Description
Instructions
The whole assembly is secured under the cooling fan, therefore avoiding contact with the hot aluminium plate which can easily distort PLA part over extended time.
Make sure to print all parts with flat faces on the platform.
You will also need the following:
2x M3x20mm bolts
2x M3 nuts
2x M3 PCB spacer
Align notches and glue all parts using super glue. The use of super glue accelerator is advised.
File bolt holes using a needle-file to allow M3 bolts to pass through comfartably.
You may have to untighten the hot end's long screws to rotate the heating block so that it lines up witht the diameter of the nozzle, otherwise the cale of the heating element will interfere.
Slide assembly in place under the cooling fan through the innermost prodruding long screws.
Retighten the long screws before securing the assembly in place using 2xM3 PCB spacers. Secure the rest of the assembly to the fan using 2x M3x20mm bolts and nuts.
The attached photos show the first iteration without the alignment notches.
I ran the Ultimaker for more than 5 hours printing an object and the nozzle doesn't seem to be afftected by proximity heat from the heating block so far.
STEP and Autodesk Inventor files included in the ZIP file.
Enjoy!
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Hello Murat,
I just have the ultimaker and i liked the design of this fan duct. For a while i have tried to print the cap part but for some reason the inner edge seems to fail due to its thickness. Did you encounter any problems with that ?
I tried using 0.2 mm layer and 0.1 mm layer but that does not seem to help. Any tips would be welcome.
The nozzle part was pretty amazing though.
Hi Gerrit3D,
Sorry for the late reply, new year and all:)
My apologies, you are right, the model I posted by mistake had a degeneracy as it didn't have the 3mm fillet under the inner edge which should match the outside fillet.
Anyway, I uploaded the corrected file.
Cheers,
Murat.
The cantilever part of the riser cap that goes under the aluminium plate gets too hot and melts.
I will post a new version of this part, so please don't rush printing it.
It is also a bit difficult to secure one of the mounting nuts. The alternative was to choke the duct to make way to it. I am now considering a slide in/clip-on design that will hold on to the woden plate rather than the aluminium plate...
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I like this object but I am worried about the airflow rate. I derived this thing (about to post but doing a few tests first) to eliminate anything in the path of the flow and to angle the fan a bit, but the flow rate is still very low; a lot of the air goes right back out where the fan is supposed to suck in. Do you experience this problem too? Any suggestions on a good fan to try instead of the stock one?
You are right, most of the air goes back out, but the reason I didn't place the fan at an angle is so that the interface between the duct and the aluminium plate is through the fan's casing which is not as vulnerable to heat deformation as PLA. When I have time I will try to lower the bottom to allow for more airflow, but this complicates the printing of the part. Any suggestions are welcome.