I wanted to experiment with getting air to directly blow on to the filament in a fine, direct manner, and as close as possible.
This design is a follow up on [https://www.thingiverse.com/thing:2919312]
It will probably be tweaked on further but this current setup should still work - it does for me.
The obvious change is that the brackets give more range of alignment and now has swappable jets!
There's optional LEDs (3mm) for that little extra touch.
It can be used to help illuminate, or you could wire it into the fans to indicate when the fans come on. Don’t forget to add a resistor!
It might be a be tricky to get in place, but it can be done (I'll have to design a fix for this at some point). Refer to pics.
The jets can be flipped and mix n' matched. Some can have a piece of PTFE tube inserted.
Each jet has an extended version (+), as my Nozzle is offset (only using 1 out of the 2 Dual hotends).
There's also the Basic shape, so you can design your own!!
The Jets require M2 bolts - if you would like a M3 version, let me know. Otherwise you may need to order bolts if you don't have them.
A - PTFE intended. This is the main one I use.
B - PTFE intended. Slight offset
C - 3 way
D - Angled
E - Another angle
F - Slot with more focus in the center
You can test the air flow by; lifting Z height > control> fan, and turn them on without having to run a print or heat the hotend.
As long as nozzle temperature isn't too high, there's no problem with PTFE pressing against the heat block.
You can also use the natural curve in the tube to give even more angles.
If PTFE is too tight to insert, try hammering them in, or carefully use a drill to make the hole bigger.
If you find the brackets keep swinging down (hitting the heatblock), you can cable tie the top holes of the fans together - it's a bit of a hack, but will stop them drooping.
With all the adjustable features, you'll probably have to adjust your slicer settings.
Lemme know how you get on with them and which you prefer.