Unresolved Fan Duct for Bridging???

Hello,

I am still working on bridging with preety unsucsull results. would a fan duct help with this? and would it work just as good for regular prints? also would 1 or 2 ducts be better? I am working PLA

I was looking at this one to try http://www.thingiverse.com/thing:431160

 

Yeah his is the one I am looking at.... I have my temp down to 195-197 for the layers Of The bridge

 

I have a remix of @Galaxius duct, that I'll try to post tonight on thingiverse. With the internal geometry lofted to increase flow efficiency by reducing circulation. I ran a few iterations by @Galaxius and @Mike Kelly.

EDIT: remix is attached here.

 

Thanks I will print this one as well to try.... My fear is that the air speed would be to fast out of a duct and blow the filament to the side or put to much stress on it..... Is this the case and just need to find a sweet spot?

 

I think you'll have to play with it, also depends on your fan. http://www.amazon.com/40x10mm-Beari...UTF8&qid=1424978797&sr=8-1&keywords=noctua+40 this one comes with an optional resistor to slow it down.

 

You should be able to set the bridging fan speed in your slicing software, I know you can in Simplify3d and I'm pretty sure you can in Slic3r too.

 

Those fans are amazing. I hate the color though. I don't think they have any with a solid color. I think they have a black one but it even has brown on it. Awesome fans though.

 

The stock 40mm Robo fan will push more air than the noctura. I upgraded to a delta fan but even that is only a little more powerful than the stock Robo at 8.1cfm

 

What are the specs for a stock Robo fan?

 

If my memory serves me correctly it was around 7cfm; took me a while to track it down

 

I just use both the fans that come with the printer, one from the ramps (disclaimer: I PUT ANOTHER ONE ON THERE) and the one that initially cools it, and I designed my own clip on tool less design. http://www.thingiverse.com/thing:697200

 

That is the best design Ive seen so far, nice work!

Would it also work with the hexagon hot end or just the E3D? I seem to remember the nozzle of the E3D hangs a bit lower when installed on the robo.

Thought Id throw my own design into the mix too. Designed to fit straight onto the stock Robo with hexagon: http://www.thingiverse.com/thing:649803

 

Marquis I like your design but I see it's made for the e3d hot end. I still have the stock hotend (pre hexagon) do you know if it would fit/work with it? It seems that the hotend distance would be different?

 

Also does it fit into the top of the case? Or would it have to be removed?

 

hmm, if the stock hot end is shorter than it will not work. I can design one like it for the hexagon hot end, just move a few lines and that's all. How much taller is the e3d than the hexagon? I broke my stock end first week of owning the printer.

 

My rough measurement was about 13mm and it would be blowing just below the heat block at the tip. What type of file is it, maybe I can edit it also?

 

The E3D v6 is 62mm from nozzle to top of heatsink.

The Hexagon is 55.2mm