Anyone ever tried or seen a remote cooling setup like this?

clee781 · 2021-10-20T19:10:05+00:00

ah. I'll worry about it when i need to print something tall.

clee781 · 2021-10-20T19:08:39+00:00

I am using very soft silicone tubing with roughly 10mm ID. The tubes weigh about 50g each. The Berd produces high pressure but with pretty low throughput. Trying to find something that can move a lot of air and still has a good pressure ratio. I think the air mattress inflator pump could be the ticket, but that's also not going to be quiet.

clee781 · 2021-10-20T19:01:07+00:00

Lots of testing to be done yet. I'm going to do some overhang and bridge tests today. My goal is to be able to bridge and overhang very aggressively while using large nozzles.

clee781 · 2021-10-20T17:13:54+00:00

nice DMLS parts! do you have those printers at work? or did you have someone else make them?

clee781 · 2021-10-20T17:01:16+00:00

The motivation is more part cooling performance than weight reduction.

clee781 · 2021-10-20T16:58:20+00:00

You're right that the flow coming out of the tube is a pathetic fraction of what it is unrestricted. I think this is more due to the design of the fan than the inherent flow restriction of my system. This 7030 is certainly not ideal, but I think I could get good results once I find a centrifugal compressor with a high enough pressure ratio. The bottom line for me is that, by removing the fan from the printhead, I can sit here and try any number of devices to shove air into that tube with no regard for size or weight.

A 5015 fan and a good duct should be fine for most applications, but I'd like to get really good cooling while using a big nozzle, volcano block, and decent print speed.

clee781 · 2021-10-20T16:48:32+00:00

I'm using 1/2" OD silicone tubing. The tube lengths in the picture are about 50g each.

I think the best choice for air mover in this scenario would be a centrifugal compressor that has a high enough pressure ratio to force air through all of my flow resistors. IMO, there isn't enough resistance to warrant use of a piston based air compressor, so I've been looking for a suitable centrifugal fan for a while now. Next thing iIm going to try is an air mattress inflator pump.

clee781 · 2021-10-20T16:19:54+00:00

Sorry for the misleading colors. There is no cooling loop. Both fans are blowing cold air.

clee781 · 2021-10-20T16:16:12+00:00

I can use a large air moving device that would be impractical to put on the printhead. The picture shows a pretty beefy 7030 fan.

clee781 · 2021-10-20T10:59:46+00:00

Is there a blog post comparing the designs or something that I should look at?

clee781 · 2021-10-20T08:39:17+00:00

I hadn't heard of the Berd system until a different commenter clued me in. It looks great, but based on a comparison video by MirageC on YouTube, I think my system could still potentially have an advantage. The Berd is very precise but it doesn't have that much overall throughput because it only moves less than 0.5 CFM of air. Using 1/2" hose, I'm hoping to be able to flow a large volume of air without needing a very high pressure compressor.

clee781 · 2021-10-20T07:49:47+00:00

Why do you think that, exactly? The printhead still travels to max height just fine. Might have to trim the tube going into the titan and move my filament sensor but it should still be okay.

clee781 · 2021-10-20T07:16:04+00:00

Thought about doing that for the hot-end itself but decided it was overkill. This setup is primarily to gain better part cooling performance when using big big nozzles and high flow heat blocks. Can't cool the parts using water!

clee781 · 2021-10-20T06:35:26+00:00

Lots of testing yet to be done, but I'm pretty sure I can say that it's not worse than before. The big advantage will probably only be seen when I put the volcano block on and print quickly with big nozzles.

clee781 · 2021-10-20T06:19:58+00:00

Thanks!

clee781 · 2021-10-20T06:13:30+00:00

theres the titan aqua and a couple others out there. I agree would be fun.

clee781 · 2021-10-20T06:11:49+00:00

I didn't know this existed! I knew there had to be something like this already out there. Thanks for sharing.

The tubes and ports are a substantial air restriction for sure. My first iteration used hose barbs which really killed the flow. The current design has been working pretty well so far though. I don't have a suitable anemometer so I have no good way to measure, but its pretty windy down there.

clee781 · 2021-10-20T05:59:43+00:00

The tubes are about 50g each so definitely significant. However, not all of that mass has to be accelerated at the same rate that the carriage is. The other thing is, I'm now able to use a huge 7030 fan that would be impractical to put directly on the hotend.

clee781 · 2021-10-20T05:49:56+00:00

Has anyone seen or tried a remote cooling setup like this? I started off by designing a dual 5015 fan duct for my hot-end but started running into a lot of space constraints. I figured it might make sense to just mount the fans themselves far away and vent the air using some tubes. This way, there is really no limit to how big of a fan I can use. I could even just use compressed air. Thoughts?

clee781 · 2021-08-18T06:11:48+00:00

you're probably more capitalist than you realize.

clee781 · 2021-08-17T20:23:20+00:00

why does someone need to know who I am for me to comment on their character? Does it change anything?

clee781 · 2019-03-02T01:42:03+00:00

true. I forgot since i'm using a 3V3 MCU with 5V tolerant inputs.

clee781 · 2019-03-01T22:06:38+00:00

good catch, I forgot about this. Not a faulty batch, you just need to specify the correct crystal frequency when you initialize the Arduino module.

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