I made a Powerful 3D Printed Air Pump with 775 DC Motor - It Broke

I made and broke a powerful 3D Printed Air Blower with forward impeller.
Ok, so this video is quite different. I am making this video to warn my fellow makers and creators about the reality or Limitation of 3d Printed parts.These are quite obvious stuff. But if this video helps even one of you watching I think this will be worth it.
Don’t get me wrong, 3D Printing is such an awesome thing, probably one of the best thing for me to be a part of.
But there are Limitations, like in every other thing.So what happened.
I designed an air pump with impeller which was powered by a powerful 775 DC Motor. The designed was pretty strong and I 3D Printed the parts with a strong infill and wall settings.
I tested everything with Eye protection seven times, even with higher RPM.
So I sat down to make a video about it. Everything was going smooth. I assembled the Air pump like normal and powered it. It was working perfectly until it broke.
It was so instantaneous, for a minute I couldn’t figure out what happened. Then I realised there was blood on my hand, my Lips went numb, and then I got big cut on my cheek. (I was wearing eye protect all the time. Thank God it was a minor accident but I could have lost my eye if I Wasn’t wearing the eye protect which could have been easily the worst thing to happen to anyone.
The funny thing, I was going to include a warning in the video, to not try this. It was just an experiment.
The Problem here was not the design impeller, but the manufacturing process of 3d printer which makes the model by layers one over the other. The centrifugal force was so strong it broke away the fins. In future I may get the same impeller made in injection moulding to test if it was a design flaw.
So, should you stop making these stuff? No, make them experiment with them, but while operating Get back to a safe distance, cover these things with something, let your camera record it, and then watch back later.
And never ever use it in real life, It can give up any time.Thats it in todays video. I just wanted to warn you guys about my experience, Happy 3D Printing. Stay Safe!
Do let me know what more you would like me to Make or Print.
#3DPrinted #MrExpert
Best 3D Printer: Amazon: amzn.to/3hn88rH
Other seller: bit.ly/2ziOgkm
Other 3D Printer Ender 3 : goo.gl/yK5PLf
Follow me on Instagram: / mrexpertyt
Thankyou for Watching MrExpert Channel !!
Subscribe to MrExpert for Cool interesting Project videos! goo.gl/4eNKQW

[@n.k8099]

I think this failure is partly due to a design flaw. I admit 3d printed part do have limitations but there is always a work around the problem. Simply adding thickness to each vane can increase resistance to centrifugal stress. You could also use a close impeller design which benefits from having a double shroud and higher efficiency. Mounting both sides of the impeller on bearing is also a good idea to remove vibrations (as 3d printed part is generally unbalanced). If you wanted more strength, annealing those printed part in an oven can help fuse fragile layer from the rapid cooling from printing process. Using PWM to soft start the dc motor could reduce acceleration and thus reduce the force acting on each vane.

[@MrExpert]

Yes it was a design flow primarily. BUt 3d printed parts shouldn't be trusted for high RPM

[@ijcarroll]

You should remake the impeller with a ring around the upper part, put small fillets around the attachment points to the disk (maybe just 1-1.5mm fillets on each side of each blade), finally (and this will have the biggest effect for strengthening) coat the entire print with 3 coats of thin super glue. And you're welcome.

[@Dowb.]

I am happy that you’re good. Stay safe man!

[@DailyFrankPeter]

Thank you for sharing! Although, this kind of thing has got to be printable. Is there any way you could print the blades in a different orientation (flat) and do the same with the hub, and then assemble? Also you can make the blades lighter (less mass -> less centrifugal force). Then fix them to the hub on two sides (one side must be a ring to make an inlet hole).

[@MrExpert]

Right bro

[@historyandnow]

Good stuff on wearing the eye protection. I have also had few mishaps but was saved by PPE. Don't stop making, be careful and take 5 to think through the risks and ensure you are prepared.

[@sandrainthesky1011]

Maybe using some TPU would be better. It's basically indestructible but can flex some so...

[@instantjustice164]

Thank God you're safe. I totally agree that 3d printed parts are not equipped to handle such stress. But at the same time, we will have to admit that this is partially a design flaw. I love your minimalistic design, it's lovely and neat. * If we use a top shroud for the impeller it might be able to take more stress. ** We can use PETG, Nylon, ABS or carbon fibre, it might be able to take better stress. Increasing the nozzle temperature also can make it bit stronger. I always use up to 10 degrees more in such cases, while keeping the layer thickness not too small. 0.4mm layers would give more strength than a 0.2 mm layer. Nice video and good advice. Stay safe and we expect more awesome videos like this.

[@TubeUnderdeveloped]

What fill density do you use and what material and temperature? It may also influence the strength a lot. Thank god you are not hurt. Please take care. I still only use the mini DC motor now (Shamed). I am also afraid of these problems so take a slow pace. I am accumulating experience in these kinds of stuff since I am new in this field. LOL.

[@MrExpert]

Everything was balanced. You cant have more weight coz that will increase the mass which in turn will have more centrifugal force. So in general its better to avoid this kind of this. It can be experimented but, from a safe distnce. And its a bad idea to use it for regular purpose. We all learn from experiences of others.

[@TubeUnderdeveloped]

@@MrExpertSure, thank you for sharing. I have learned a lot from KZbin. But still not sufficient yet. Doing experiments by ourselves is the best way. But it needs time and money. LOL.

[@chazy10]

I love the design! Any .stl?

[@puriap250]

Damn I already bought the parts for making a blower exactly like this. I tested it at full RPM and it didn't fail. But after watching your video I realize it is possible it can fail later. That sucks. 😓

[@MrExpert]

Yes be very Careful. I almost lost my eye .

[@nking7273]

I'm from Ethiopia l love you

[@czasownik5296]

It look as car turbo

[@Si1entKiller99]

Where's the file ?

[@griind]

One thing that should've been obvious to do, even without knowing it would blow up in your face was to NOT point it AT YOUR FACE, honestly, this is just as much your fault as it is the 3D Printed part's fault.

[@MrExpert]

This is 1000% my fault. That is what I was trying to say! Don't be like me. accept the limitations of 3D Printing.

[@griind]

@@MrExpert Aight, then I didn't read it correct, felt like you were blaming the print/ not blaming yourself even a little bit. Also, perhaps try finding a few more songs to use in your videos, it gets kind-off annoying when you watch a few videos after each-other. Other than that, great videos!

[@MrExpert]

Yes sure. I will concentrate on music soon

[@khangai-dbr4282]

Turbo