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Ultimate CTC Filament Cooler / CTC Fan Duct

by blackbird2016 Apr 21, 2017
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Would you happen to have a model number for the fans?

Thanks in advance.


You might want to check on the pictures.
I took one of the fans nameplate for that purpose.

Could you post a step or iges? need to make some changes as I am using a different hot end now and spacing has changed.
Great design and would love to be able to use it.

I just uploaded a .step file for the base for you.
Let me know whether this is of use.

I printed one of these out but had to add in some small supports because otherwise the first layer near the fan down the bottom would just drop straight down and block airflow. I was using In-PLA which is giving me mixed results, I think its a bad batch or something.

Non the less, the section along the back behind the large rectangular upward facing vent is almost 9cm long without supports, Its quite hard to get filament to bridge 9cm distance even with the good stuff :)

Suggestion would be to add in a few directed support pillars in the region.

PS. I will upload a photo later of the one I printed.

I just added a screenshot from my sliced (S3D) model with the "well placed" supports.
They are just for the "free hanging" perimeter. S3D makes the bridings (yellow) in some 60° angle
which then in my experience is not that big a distance at all.
I should say, that this thing is no big deal to print at all, given your printer already
is equipped with some kind of active cooling.
Without I fear it may be nearly impossible.....
For that I recommend using some household fan or hairdryer (cool) manually held
at place while the printer does the crucial parts.

The PLA I am using is either from https://www.material4print.de/ which is pretty good for me.
Or my favorite from http://www.eumakers.com/ which is not exactly cheap but
very well to process and they really do have the widest and nicest range of fine colours.
At least for me here in Europe...

Yep and that actually seems fine, for one example my S3d wasn't doing that (perhaps Linux version issue) but I rechecked it again and it does indeed look fine. HOWEVER: and this is important, the supporting structure this bridge depends on can be a issue. Refer to the image link:


I'm seeing no way this line can print without decent supports. I mean sure maybe it can if printer is well setup and good filament is used, but lets assume that not everyone has that situation :-)

In saying that it is easy to add supports in this area, I just found it odd that you didn't just include a few small rods just to be sure.

Just added a version with supports. :)

Looks good. I will print this again soon, just had a roll of in-pla be tossed out because I was drying it out in the oven at 50-60c and it decided to stick together on the roll and basically become useless! That's NEVER happened before with any other filament so it is telling!

Your grey print example must be using some very good quality filament to loose so clean. I'm not sure if I will continue using this In-PLA its like printing in glass.