วีดีโอ

Hi! Where discord? Also, would you mind sharing your duct design resources? I think i got the basics out of a HVAC manual but i feel i might be lacking.

How much noise is the brushed motor? I wonder if a cheapo brushless and esc would reduce sound and power...

low rmp centrifugal compressors already exist albeit hard to find examples of. you usually need at least 3 stages for decent throughput at higher pressures and they have a tendency to explode at high rpm. honestly though for 3d printed parts multistage axial plus 1 or more stages of centrifugal at the end depending on pressure needs is ideal. you can legit get ~10 psi max from axial compressor stages and they are super compact to stack with high tolerances. a old 100 stage one i made for shits and giggles would literally blow up the walls of the compressor if you managed to plug up the end. the outer wall was 1mm thick aluminum cast tube with steel wire mesh inside. stators and rotorblades were made out of cardboard(not corregated) while the main shaft was a 6ft piece of rebar with aluminum bushings. at 30 rpm the output pressure was ~130 psi before rupturing. note that the failure mode was not the cardboard parts despite being the ones imparting the energy. this is because despite the absolute pressure being very high near the end the pressure difference across the stages was actually quite low (~1-7 psi depending on the stage). it should be noted however that while axial compressors are technically more efficient in terms of static pressure you'll need a lot more stages to get decent pressures. do note that despite having high tolerances it does effect the performance somewhat if you are too loose and also while you can use something like cardboard its not recommended due to frictional losses (the air that came out of that behemoth mentioned above was hot enough to cook with despite less than half a rotation per second, its not supposed to do that)

will this fix the ripples in the nimble prints? I have a V2 with that issue, though i know this mod wont fit it im still curious

Fully encapsulate the top and bottom of the blades and housing and run a tapering channel to spill the air into you can use an impinging flow channel to get high pressure when it couples with the bulk spill air like a delavel nozzle running around the outer edge of the toroid where the opening is the outlet just a hint for future developments same as under an f1 car or the inflatable slide on aircraft.

I'd be interested to learn more about this. Is your thesis published anywhere?

you should get brushless motors

Anything new about this delta?

Makes me think if ordering 6x48v 2.8A LDOs was too much 😂

your printer is insane. Like not jsut a little crazy but full on leader of the iner sect of the nut house. I love to hyper focuse but you even make hyper focusing scared. Fish want to be you and woman dont know what to do. Love it keep it up

Whats the name/material of these bag?

Bldc motors are your solution

Hot!

your intro doesn't sound salty at all, in fact i couldn't hear a thing you were saying through that tin can with a string coming out of it jabroni microphone

Serious question, could this be scaled up to 400mm in diameter and used for the vacuum table on a CNC machine? Vacuum tables normally use these side channel blowers/ regenerative compressors and I have a ratrig 400 so I could print a 400mm diameter housing

😎 'promosm'

i wonder, if it could supply air to my moped lol

Why are you torturing yourself with Sketchup? Two whole hours to loft two rectangular shapes along a guide curve with a bit of rotation here and there? That's insane, you need to value your time more. This is a ten to thirty minute task in a proper software suite.

But but but... more compressors

I'm very interested in staying tuned. I'm currently rebuilding/redesigning my own effector and extruder assemblies... Can't wait to see what you have in store!

I dunno if I would refer to excess creativity as a problem. Rather, the problem is too few hours in a day.

Does anyone happen to have a link or info regarding the hoses shown with the CPAP fan setup at timestamp 2:53???

How do straight lines in a duct affect airflow? I grasp that it heightens friction, but could it also lead to turbulence? Additionally, if the duct divides the air into chambers/sections, like in the case of this (i.ibb.co/WcGN1sN/Capture.jpg) example 120mm fan duct, what impact does it have on airflow dynamics?

Great video, but I will probably skip half of the secrets and try to use a loft. Since its a pain in the ass to make 3d sketches with this program.

The intro to this vid was pretty funny. Got a laugh out of me!

what is the flow rate of your compressor??

Great video, even if watching you use sketchup made my eyes bleed lmoa.... question though, have you tested two outlets vs one? I see you talking in comments about offsetting outlet angles 120deg, so the flow doesnt cancel, but I cannot find anyone who has actually tested this vs a single outlet. Well apart from one dude who wrote a quick reply on the Duet forums saying of all his tests, simple single outlet is better. Any thoughts yourself? Aside, I use a laptop CPU fan (Lenovo B450) and then design the scroll housing in with the ducts. More powerful, quieter, etc. Just upgrading my extruder and dithering over 1 vs 2 exits now!!

I wanted to give you more than 1 like, so here is my comment with my extra like!

Isn't there a formula or something to know the optimal outlet cross sectional area? Avesome video!

What I got: 0- Narrowing down a fan duct: Increase in Airflow Velocity: Faster Solidification. 1- you need to figure out how much can you narrow down the outlet before your fan can't handle it. 2- you should cut one dimension of a duct in half in a run of no less than 2.6x of that dimension. "changing the cross-sectional area too fast cause throttling" 3- to get started with a duct is to place your start and finish and then work to join them together this is a lot easier than trying to work from the start to the end. 4- you need a smooth overall run with big curves. 5- the ideal duct cross section shape is a circle the more perimeter you have for your cross-sectional area the less efficient your duct will be. 6- the shortest possible duct with hard bends is likely to underperform versus one that's a little longer but follows a smoother path with larger radius bends. 8:15 7- avoiding Sweeping Curves Along the Wide Axis: Sweeping a curve along the wider axis of a duct (which has more space) may require more area and can be less efficient in terms of space utilization. Sweep axis " sides ". 8:35 (bend it like a ribbon 8:32 8- lofting can cause problems, try having more stations and spreading them out so that you're not overlapping too many changes to the size shape and direction of your duct. 9- don't cut down to the final Outlet cross section too soon large ducks are more efficient than small ones 10:42

Wow that would work really good with fluids

It means there is twice as much money if you can read the end ;-)

I am planning to try out this design for my airbrush!

Rowdy

I have made several mistakes you identify here. I asked around on forums and nobody could identify the problem. This video contains precious practical knowledge (distilled down from arcane formulas or passed down as tribal knowledge?) i have a question : isn't "change the cross section of the duct as gradually as possible" and "keep the duct wide until the end" conflicting commandments?

Can you give some tips, where to target the center of the tip of the duct respect to the hot end nozzle? Why some have cuts to the end? I dont want to cool the nozzle hot end. Thanks for sharing your knowledge. I m doing for 2 5015 blower fan setup with e3dv6 for argentinian diy printer ( makerparts)

Don't complain about power, here is ~30KW electric turbo! That is some serious power! th-cam.com/video/c7dnZ5yycYw/w-d-xo.html

Fun fact, floor is a bigger workdesk, than a workdesk.

I’m planning a pretty insane delta build. Insane in the sense that I’m insane for thinking it’ll work. BUT, part of the build is some aluminum corners that accept 2040 extrusion towers, and also have 12mm holes on either side that I plan on shoving some carbon fiber tubes into. I’ve calculated about 0.0056mm sway with this setup, maybe even less. I will also be cabling the corners down to the table to reinforce the top even more. Because of this, I think I can get away with 3 extra motors on top for 2 motors per tower, which may fix the issues you are having if you’d like to give it a shot. Shooting for a reliable 2000mm/s base print speed to put that core XY guy to shame and get deltas back on top ;)

Deltas are making a comeback! Love to see it.

Excellent

Oh my god

Good grief. What a beast. Nice work!

AWESOME 😎😎😎😎👍👍👍👍👍

I warn you it gets intoxicating 😅

Congratulations 🎉🎉🎉

Hi James, for secret 2, when you talk about axial fans only tolerating high ratios, are you referring to the outlet to inlet ratio ?

yea 2020 flexes. how much that matters at the hotend though, dunno. what i do now that a moving bed printer that you stiffen up by just lazily throwing more 2020's at it to box it up does sing a lot less and feels a lot less sketch when running higher accelerations and speeds

If you're worried I'm dead, no, I just messed up my back this summer and got way behind schedule, including on making videos. I'm getting better, though, and project videos are coming SOON (TM)

Oh god, RIP this guy because he uses SktechUp which is not a CAD modeling software.