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Oceanic

almost 10 years

Thanks for this nice fan duct! It works perfect for me. Perhaps you can create one for a thicker metal shield? The clips are a little bit to small (for me). And a design thing: Perhaps you can make the grill in front a little bit higher, so that the whole front is closed. But only a suggestion.

JimboJones

almost 10 years

I like this so far, want to try my Bridge Nylon again. I printed this in white Colorfabb XT, hoping it would be able to withstand the heat better, plus reflect some of it. I had a bit of trouble when doing a print bed alignment after installing this. The bottom of the duct hit my right bed clip & I had to bend the clip down slightly to do a proper alignment. Works fine now.

Roumen

about 10 years

Excellent design, printed at 20% infill total parts are 5g lighter than the original. Airflow is better balanced left & right, definitely a keeper. Printed in Red PLA, no sagging yet but only short print jobs.

sfriedri

over 10 years

"Unfortunately, this design directs too little air at the nozzle to work well for small objects the left ear (as it faces you) on the UM2 Robot curls upward severely, while the right ear prints well - just the opposite of the original issue." I can confirm that. Therefore I switched back to the other version: https://www.youmagine.com/designs/ultimaker-2-fan-mount-dual--2

jbeale

over 10 years

I am using this part printed in blue Ultimaker PLA and it is working well so far. I included a heatshield from thin aluminum foil (folded over, so it is double thickness). No sags noticed so far, several hours in. I think the new duct also lowers fan noise, relative to the stock sheetmetal bracket.

jbeale

over 10 years

ABS definitely is more heat resistant than PLA. Also, I know at least some types of printed ABS (I tried blue) are somewhat translucent in the near-IR (940 nm) so maybe it doesn't absorb much radiated heat.

EldRick

over 10 years

BTW, I printed these in white ABS, and haven't seen any warping, even without the heat-shield. Perhaps darker colors would cause an issue...

jbeale

over 10 years

For anyone else wanting the heat shield dimension drawing: the full un-cropped version is here: https://s3-eu-west-1.amazonaws.com/files.youmagine.com/uploads/image/file/46629/Shield-20140508.png

venkel

over 10 years

Okay, I found the old version and placed it on the DUAL page.

EldRick

over 10 years

Unfortunately, this design directs too little air at the nozzle to work well for small objects - the left ear (as it faces you) on the UM2 Robot curls upward severely, while the right ear prints well - just the opposite of the original issue. Could you please replace the older version? The one that is shaped like the dual-extruder version?

jbeale

over 10 years

I would also like to see the heat shield drawing. Can the file be put here in the "documents" section so it can be downloaded without needing Google Docs permission?

sfriedri

over 10 years

I wasn't able to see it but you should have received a request by now.

venkel

over 10 years

if all is right you should be able to see it on my Google Drive https://drive.google.com/a/roble-engineering.com/file/d/0B8brAdqUl3KdeUdoXzZ4dl9jMzQ/edit?usp=sharing

sfriedri

over 10 years

Could you upload the drawing of the heat shield somewhere else? YouMagine cuts the picture so that I can't see the dimensions... Thank you!

venkel

over 10 years

Thanks very much. Because I'm using the plastic fan ducts for weeks now it's hard to see the difference. However I see round parts coming out clean on all sides now. Did you try the metal heat shield? My duct sags a little after time without one.

EldRick

over 10 years

Excellent! This one is amazingly effective. The earlier versions were more efficient than OEM - I had to turn down the fan setting to be able to hold 240C at the extruder. This one, however, is both more effective and gives visibly better cooling. I noticed two things about this version: - When the fan comes on after the first couple of layers (Kisslicer) I had noticed that the extruder temperature would drop by 5-7 degrees, and it would take several minutes (2-3 layers) for the temperature to come back up to the 230C set point. With this fan duct, the temperature drops less, and comes back up to the set point in half a layer. The extruder temperature is also more stable by a few tenths of a degree. I take this to mean that it actually does produce less unnecessary airflow around the heater and nozzle. - I also noticed that when printing Sparse Infill (Kisslicer feature - infill only prints every N layers) the threads of unsupported infill that previously sagged quite a bit, no longer sag at all. I take this to mean that the piece is being cooled faster and more evenly - a good thing with PLA.

venkel

over 10 years

See the drawing for cutting dimensions.

EldRick

over 10 years

What is the purpose of the two flat tabs on the back of the piece?

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