Water Pump || DIY or Buy
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- Опубликовано: 24 июл 2024
- Trinamic Website: www.trinamic.com/
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Websites which were shown/used in the video:
www.thingiverse.com/thing:165...
www.thingiverse.com/thing:311...
In this episode of DIY or Buy we will have a closer look at a small commercial 12V DC Water Pump. We will find out how it works and why it is called a centrifugal pump. Afterwards I will then 3D print a bigger water pump in order to find out whether it makes sense to DIY such a pump with a 3D printer or whether we should stick to the commercial solution instead. Let's get started!
Thanks to Trinamic Motion Control for sponsoring this video and sending an early version of their DOCK5 board, which features the ROCINANTE chip with integrated RISC-V processor.
Visit www.trinamic.com/ to get awesome motor control ICs.
Music:
2011 Lookalike by Bartlebeats 
Наука
I noticed that quite a few people are disappointed that I did not improve the 3D printed pump with a metal shaft. So here is a quick explanation why I stopped at that point. The reason is quite simple and is called time. I already spent 60 hours on this project when I got to the point when the shaft broke. That of course includes everything like planning, getting parts, writing a script, doing test, filming,......... Of course I could have tried improving the pump with a metal shaft but due to other problems I noticed that come with such a 3D printed design, I decided that such an option would not be sufficient for my garden and declared buy as the winner. If I would not have done that, then there might have been a successful water flow with the 3D printed pump but then again I would probably not have enough time to produce the next video for my channel. I appreciate all your feedback and I also love to tinker and get things to work. But I still have to think about getting content out regularly because this is my full time job. You can always support me through Patreon if you do not like this concept. So I can pretty much independently decide how much time I want to spend on projects instead of thinking about how to please the RUclips algorithm. Thanks for understanding.
I think that's fair enough! At some point you just have to call it quits. Thanks for being honest tho!
I like your channel!
Why can't this level of transparency exist in government also.... Great Scott for president???
So can we expect a part 2 of the video? I'm eager to know what would be it's flow rate.
What is the vga port on the microcontroller used for?
You should have drilled the plastic rotor axle, to replace it with a metal one. I guess this could have made your pump work a little better.
Yes but since the impeller is 3d printed, a plastic shaft would be present because if not, how would you couple the motor shaft to the impeler ?
@@Aybex97 You know that there is such a thing called shaft with a keyway?
I'd make a hole, and glue it, or use a shaft with a key-way as Thomas suggests for better results.
@@Tomas970506 or just drill through and put a screw in keyways are difficult to make without a mill
Clément 2000 THE VANES ARE BACKWARDS...!!!! How come no one is saying it..? SCOTT ITS BACKWARDS ;))) look at the vanes on the small pump you bought and see which way the vanes curve in respect to the direction of rotation ;)))
3:25 THEIRS (note exit hole location, impeller rotation direction and the angle of the vanes.
5:05 YOURS, note same things ;)
@GreatScott!
There's a lot of issues with your diy solution.
1)the axle was thin enough that there was no contact with the bearing. The oscillation of not being held perfectly centered could have contributed to the shaft breaking
2)the long axis of the shaft was printed upright, meaning it could easily shear along the layer lines. Print it sideways so the layers run along the long axis of the shaft
3)petg is one of the most brittle 3d filaments out there. Abs would probably have been a better solution in the first place
4)3d printing the shaft was probably not the best idea in the first place
5)you could add a u groove in one of the sides of the pump enclosure, and lay a thick bead of silicon in it to create an o ring
Those are the issues I'm seeing right off the bat. I'm sure there are more issues that led to failure, and I also saw a lot of areas that could be improved, but didn't necessarily lead to failure.
Just use a metal shaft. Or mount the impeller directly on the motor shaft. Then there is no need for any extra work. I would also add a seal for the shaft
There is more, the pump isn’t primed”
Which is important for it to work without any issues.
@@zainahmed4172 true. Centrifugal pumps have a very difficult time pulling suction without sufficient pump head, as well as issues when cavitation happens or if there's large pockets of air. Air is compressible, and these types of pumps (impulse type impellers) are meant to really push incompressible fluids, not cause flow due to a pressure difference.
4:59 Your fins are mirrored, that causes a lot of extra stress and resistance to flow.
could you elaborate? edit: nvm i figured out what you meant from someone elses comment. sweep angle is wrong
@@justd3fy more that that there are a even number of blades that cause cross pressure when the water is released on the output side
@@justd3fy Water is incompressible. The water is 'flung out' by the wheel and follows a spiral. The circumference of a circle increases with radius, so for conservation of mass, the cross section normal to the flow has to stay constant. This creates a certain geometry for a spiral.
@@justd3fy no, the impeller is facing the wrong way:
www.researchgate.net/profile/John_Anagnostopoulos/publication/228664782/figure/fig3/AS:667634819403779@1536187953532/Sketch-of-a-centrifugal-pump-impeller.png
The impeller should rotate towards the pressure side.
@@thorerik I went back through the video and you are indeed correct.
Direction of rotation is clockwise from the back (outlet facing right): 8:29
Direction of the impellers requires clockwise from the front (outlet facing left): 5:08
the impeller needs to be taken out and turned around the other way. If he simply spun it the other way with the outlet where it is he would get some hellish eddies
Honestly, this is the kind of design I would use for an air blower or vacuum not a water pump.
A metal shaft and blades might have helped too.
9:16
anyone with a 3d printer saw that one coming since 4:20
such a small cross section of 3d printed material is really weak
especially when printed along layer lines
especially in PETG, PLA has the strongest layer bonding of the "low temp" materials unless you go to high temp like nylon in a heated chamber
@@l3d-3dmaker58 And PLA flexes less and the biggest mistake he made, is not actually using to bearing, but letting the shaft flapping in the breeze.
The was a pretty obvious problem even to those of us who haven't used a 3D printer yet.
At least he leaves the comments open to let people tell him what he did wrong. Some RUclips technical channels delete comments pointing out errors. The Raspberry Pi Guy has contributed to many destroyed boards because of bad directions. He deletes comments pointing out his serious mistakes.
Yup I would have printed that piece separately oriented another direction and glued it in. Or just used a metal rod.
@@Alobster1 even printed in a different direction, it still would have broke. Just get a small/cheap section of m6 threaded rod, and it would have been fine.
You got so close and just said “eh whatever “ 😂 all you needed was a metal shaft and your gasket would’ve worked and you need to prime the pump but it’d have done the job
No. The forces that these pumps go through are extreme. Traditional centrifugal pump vanes are usually made of glass reinforced plastic and have extra reinforcement designed into the impeller just to handle the forces that are exerted on them. That large pump design was designed to fail, and I'm shocked that it wasn't the vanes that did.
@@christopherjones2301 Yeah true, but in this case he made a very clear mistake. The impeller vanes/fins are wrong. It should be the opposite. We can compare to the commercial pump at 3:25 to the DIY one at 5:00. I dunno how Scott can miss it and commit such a fatal mistake. I hope he rectifies it and try with a metal shaft, it will definitely work to pump water if not on very high power.
what else do you expect? this video was made just to show that trinamic board
Christopher Jones yea no kidding, I fix pool pumps and the impeller is 1/4 the size of that thing on the orange pump he made. Meanwhile on pool pumps they are about 1-2 horsepower
@@DSmartLife It rotates the correct way. See later footage... Notice the rotation of the motor coupler??
Did you see the "rocinante" and the drawing of the ship from the expense on the ship ? Nice touch ahah
I saw it. Hi five "Nerd". ;-)
Loyal soldier of the MCRN im glad im not the only one
To na kang setóp da mesach!
Detim imim finyish du wa ting, im ye fo sémpere.
Da Rosi im gútegow xitim!
8:52 „… does not work well with my small balls.” :-D
Should have tried a metal shaft. The rest could be 3d printed
yeah, first thing I though. Design a pump with less flow load and use a metal shaft. The massive eccentricity between the rotor and motor also did not help at all (the wobbling shaft)
Also didn't help that his 3d printer wasn't properly calibrated. You could see the top layer lines peeling away
Tomgie yes METAL for all shafts and hinges.
@@christianscandi yeah, while the thing in the upper layer is a problem (one that I'm having right now) it doesn't seem to have caused any failure at all
ruclips.net/video/aXcEiOuWKx4/видео.html&t DIY is winner!!!!
i used motor direkt on impeller.. make 10meters lift.
I noticed this in the first instance. I have made my own pumps but without 3d printing. I made small pumps by casting exposy resin and grinding it down. Now all you need to do is screw in proper shaft and add a waterproof bearing. These you could get from old blenders. Yes, the size will be large but you can adjust your shaft to be thick in the middle.
Remember, this is a sponsored video
I bet that Trinamic are great 'The Expanse' fans :) Lovely print on that chip!!
Any other "The Expanse" fans caught the reference? :D
Yes I got it. Hi five "Nerd". ;-)
First thing I noticed when he displayed the board on screen!😁
Massive smile when I saw that! Kudos to Trinamatic
I'm watching your channel after a long time. Used to watch it regularly. Great to see you grow so big.
The vanes on the orange pump curve the wrong way, that would put more strain on the shaft, although the shaft sould be bigger or replaced with metal
Also he's spinning it the wrong way even for the given vane direction (ie trying to suck through the outlet) I'm not sure he realised this though as he still tried to use the intended outlet as the outlet. I think you can even see it push a bit of air into the bath tub water near the end.
Edit: I was wrong, see Daniel's comment bellow for why. Short answer is that centrifugal force wins out over any effects that the blade angle or curvature could impose.
Not sure about that, he was hand turning it the right way, but much like wagon wheels on western movies, the shaft could look as though it's turning the wrong way when powered.
@@maxk4324 vane curve has very little effect on centrifugal pumps. Direction will effect it but not reverse flow.
@@maxk4324 It will still pump water, even with the vanes curved the wrong way. It will just be very inefficient because it causes a lot of turbulence, the pump is fighting itself. But the fundamental principles of centrifugal pumps mean it will never reverse flow. In-fact forward curved centrifugal pumps do exist but are mainly used in air pumps and tend to have smaller vanes closer to the edge of the impeller.
@@danielrouw2593 The curve has a high effect on the flow dynamics inside the pump.
seeing them at 5:00 they are the wrong way. They should be curved in the rotation direction, so they "throw water" into the outlet part - not shovel it in circles.
The turn direction by hand was correct there.
"I noticed the big tubes did not work well with my small balls (bowls)" Funny :)
That was such a wrong use of teflon tape in the beginning
I love it
Why didn't you make a 5mm hole in the rotor and put a M5 bolt to be used as a strong shaft? I think your huge pump could work well! 💪
He wouldn't be able to seal it since a shaft seal can't work on threads
9:26 they probably used the motor shaft instead of a 3d printed one, judging by how close the motor is to the impeller
its also badly printed, the layers look terrible
Having printed one of those tiny ones, I can confirm that it does use the motor shaft. The impeller just friction fits directly onto the motor shaft.
@@rueebliortak no, it is clear that the parts were printed on a raft, however this should not affect the shear strength of the shaft.
@@s.sradon9782 The layers being perpendicular to the shaft certainly contributed to its weakness and failure. Also, he printed the fins the wrong way around, which creates more drag and stresses the shaft a lot more. Still, a metal shaft would have been a much better idea
I love this series
haha I like the sound of defeat in " Buy is this time, like most of the time, the winner".
7:38 *The Expanse* fans? 🚀
me haha
Is that black rectangle with the Roci a chip or is it just decoration?
@@henterpeter4806 yes it's a chip
glad im not the only one who noticed lol
Love that show!...cool looking chip!
You could use a long m4 screw with two washers to act as a shaft . It would be more durable
Great job mr scott you proved that everything is possible by ourselves. I really appreciate your work and dedication.
I have a 60L Tank with an DIN71 cap I want to use it to pump water from it to use it for watering plants on the cementary . Do you have an idea what can i Do?
the sweep angle of the 3d printed vanes is backwards.
0:08, yeah, the "winter" in Germany now is incredible!
Ja da skokmt aber noch
Hello from Russia. Its from -1 to +1 for last 2 months insted of usual -10/-20. Its best winter in my memory and i'm loving it. We're starting to think global warming isnt a bad thing after all.
@@goodfis624 Shit 😂, my sister is sad because here isn't even snow. And we have like 7-13 instead of - 5 - 3 or colder / warmer
@@batery5156 mal hoffen, will Rodeln D:
@@TRMrStone lebt im Harz da war ich mal im Winter war so geil bin da auch mal vom Berg mit demm Schlitten gefahren besste Zeit ever fahren halt nur 3 Stunden dahin
Nice project. I like it
Even before you started, I had two likely problems in mind: water-sealing the shaft and stresses on 3D-printed parts. Concerning the stresses, I would think a metal shaft with a hole that holds a nail, to support the plastic propeller would be an easy DIY solution. But what would be an easy way to water-seal the rotating shaft?
Use a metal shaft for the impeller and it will work perfectly. I have made several 3d printed pumps with no issues. Simply attach the impeller directly to the metal shaft of the motor. I understand that it wasn't worth your time though. Also your pump impeller had blades that are curved in the wrong direction. they need to be curved backwards to the direction of rotation.
Instead of printing the shaft as a cylinder, you can rotate the model in the slicer 90deg and print it so that the layers are parallel to the axis of the shaft. This will add a TONNE of strength compared to your current design. You will have a lot of supports to remove in the end it won't looks as pretty bu it will be hidden anyway😉
Really nice video!
I designed a similar project a few years ago. I used a submersible aquarium pump which is self-priming with magnetic drive. You need to ensure that not only the flow is good but the "head" or how high the pump can pump the water is also adequate. I had some hanging plants. Interested in seeing the control and measurement part of the design.
Dude you need an aquarium ;)))
And at 5:09 the pump vanes are backwards bud
6:08 STILL BACKWARDS...!!!!! ;)))
If you have the canes in the correct orientation then it might not fight itself and won’t have such stress forces.
You forget about plastic axle what is not fitting to bearing... It is better to use real sealing like simmering or o-ring. It is also better to make small one with higher rpm than bigger with lower.
Yes, they are! It's kind of disappointment. From mechanical point of view this pump is terrible ...
Its not necessarily his fault that the pump vanes were backwards. Remember that he used a user created file that he just downloaded and printed.
Idk why, but i really like water pumps
This video just need a second episode. It is so fun.
Very instructive.
Nice experiment there. I enjoy your sunday videos every time. A steel shaft for the impeller(fine tuned inner diameter for the shaft) with two 608s in line would improve things. Mach weiter so!!!
Please do the irigation automatization. It would help a lot.
lol I like the Expanse reference on the speed controller.
I have that Chinese exact pump. It's been sitting at the bottom of a water butt for two years. Still working. It switches on when the soil gets dry. I designed a capacitatave sensor thing to activate the pump. It moslty works. I added a float sensor so that it never runs when the water butt was empty. Happy plants.
You need make a second part for upgrade and fix the pump.
the diameter of the impeller axle shaft, made me react instantly :-) Otherwise it was a nice video
Not the biggest issue honestly
Hello great scott. I m trying to generate electricity with water. Is revers engineering this commercial water pump the say to go?
Is there a better way?
Thank you.
this guy is one serious engineer. he knows his stuff
00:14 I totally *NEED* that 😋
Every video he says "Stay Creative" his voice gets up a tone xD
Olha só se não é o Pesterenan
Dear Greatscott,
Thank you very much for giving us Directions for our DIY projects through your experiments ...
Great Scott, you are great. Thank you for all your awesome videos.
You can always replace the plastic impeller shaft with a metal one.
The Expanse :D 7:35
Hell yeah!
Nobody:
Great Scott: *H O T G L U E*
When in doubt - hot snot it!
I don't think it will hold. Especially with cold water after a few weeks.
I need the wire you use in the pcb making process. Where can i get it and what is it called
DIY vs BUY, ESP8266 smart switch w/alexa/google integration. I'm working on setting up home assistant on a raspberry pi, and have 6 each NODEMCU ESP8266 + Relays. But as I'm digging into software I find that there are ~$5 pre-built options. DIY is more flexible in that I can code it in Arduino and have it read sensors etc where the pre-built ones are largely focused on switching a relay. I'm thinking there is a place for both in my smart home, but would love to see your take on it!
Why didn't you try that with other materials? (in the 3D Printer)
Well, I could have tried ABS. But I doubt that ABS would have been the solution. It would have been better to use metal for the wheel shaft. The rest of the pump might have been able to deal with the forces. But then again there were a bit more problems with the 3D printed pump that did not make it in the video. I think even if I invested more hours in the DIY pump, the result would not have been that much better. That is why I decided to stop as soon as I realized that PETG could not handle the forces.
But waht is wiht PLA?
PLA can take less forces than PETG and ABS.
@@greatscottlab PLA is definitively stronger than PETG and ABS but it is more brittle and not water tight. Maybe a steel shaft and nylon for the impeller would work.
@@greatscottlab How was the shaft sliced, would slicing it in a different way mean it wouldn't shear like it did
second attempt with metal shaft?
Does anyone know of a 3 D printed pump for molasses? Thank you in advance for any help you can give me .
Dear Scott: My rent is high and so is my electric bill. So, I want to have a little generator in my apartment to generate some free electricity to charge my phone or run low-power appliances. Can I use this water pump in REVERSE? I want to run water from my bathtub faucet to use the D.C. motor as a generator. Thank you.
IMO They're terrible - you'd be better off with a purpose made small turbine - or just a small solar panel...
2:43 why do I find this funny
Bc it is
Your impeller is wrong. As it is, it tries to draw inverts.
Would changing the orientation of the shaft during printing, so the layers are perpendicular to the exerted force, not solve this issue? Or printing in abs?
All your videos are good.
3:43 That's what she said...
...
*sighs now that all faith is lost in humanity
@@mr.coolio4321 2020 isn't over yet!
Next episodes of Greatscott:
LEDs - DIY or buy?
p-n junctions - DIY or buy?
n-type silicon - DIY or buy?
silicon crystal - DIY or buy?
sand - DIY or buy?
🤣🤣
Hadn’t heard of Trinamic. Now I have, checked out their site. Just what I needed! Good sponsor to have.
Great Scott!
Never seen anyone use Teflon tape on barb fittings before....
8:52. That's what she said :)
😂😂
LMAO
Hey nice video! As someone trying to learn more about Trimac motion controllers (and more specifically, the TMC-API), is it possible to share the program they sent you to compile and flash? I'd love to dig through it for hints. If not, no big deal. Thanks!
just a question its any way to drive vivrations phone motors like neo pixel? or you need to die in a matrix way i dont study electronics but i love it if you have the time to answer ill be glad
The design you chose is pretty terrible. Also not really comparable at all to the commercial one.
I am watching you now for some years and normally enjoy your videos, but this was unfortunately your worst one.
Awesome, the same I was trying to get a automatic water supply solution for my garden, which works on three input (humidity/moisture, time and temperature)
the second is self priming ? i search a mini self priming water pump to print but it i don' find, if someone have a model thx
I've made small water pump with junk plastics, metal and dc motor. I've made the fan by cutting and and glueing plastics and metal. The performance is satisfactory for a small pump. The most important thing is I had fun doing it :)
i have a bigggggggggg question can I replace a battery Li-ion from my Asus laptop and whit a
extension connect a battery pack of 18650 cells???????????? Of course, this will have a bms...........
it's possible?
Rocinante! Nice! :)
You can always make parts like the shaft thicker to increase strength.
Additionally, there are many other materials you can print with, such as carbon fiber, to get much stronger parts.
I would consider magnetically coupling the impeller instead of a direct drive. Also, I would experiment with different blade design to make for more efficient fluid transfer.
Ahh, look at that Noctua fan on 3D printer! Beautiful! :)
Would you try this project again if you use magnetic coupling instead to drive the impeller?
I liked it, thx for the comment on the time to put things together.
Finally i can make my own water pump to my watercooled build
hey scott where can i find the code to control the pump
great job man!
I did a same type with an old vhs tape motor. Its powerful even with 6Volts.
I used two soda caps and a lot of hot glue
But the wheel was flat. Not rounded
Great video. I have done quite some 3D printing myself, and I saw the weak point from a mile away ... 😀👍
Thanks for this interesting video.
Amazing videos thanks!!
I love the look on your face as you scowl at the garden out the window.
what type of printer and plastic do i need to work with pumps and fittings?? to avoid leaking water all over the place
I feel like this boils down to your R&D restrictions: there are numerous solutions that all might help fix the issues with DIY that you found. Perhaps try to use those solutions when you actually get to implementing it in your greenhouse system. Printing in another direction or not with the layered extrusion method might help, or using metal parts for things like the shaft will very likely solve it. Great video even if it was less conclusive than you like to be, time constraints are tough to work with! :)
If you want some help for a custom design of the pump ask me. I am a mechanical engeneering student and i did some exams on pumps and turbines. Moreover I would give you some advices on the mechanical part (why the shaft is thinner than the bearing bore?)
Love your videos bud. Been a subscriber for a while now and never miss a video. Keep up the good work.
Good job
Very good video. You have not only printed a pump set but also discussed about its advantages and disadvantages. Some other RUclipsrs are there who just takes credit of making a pump without any actual result.
I agree with many of the suggestions below. Also there seemed to be a lot of shaft vibration. Are you sure you had the correct size coupler for the printed shaft? It looked like it was moving eccentrically. Couplers with set screws are something I stay away from. Split clamps do a much better job of keeping things centered. However, either way, you need the correct size coupler for the shaft size.
oh my that pcb with the Rocinante spaceship from The Expanse looks awesome
2:53 "and it seems the water can onlky enter this way , and exit that way"
well i dont know what you were expecting but the last time i ckecked, centrifugal forces always paint outwards from the center of rotation. I mean its literaly called centrifugal pump.
These basically create a more or less stable pressure difference between inlet and outlet. based on rpm.
On the other hand there are positive displacemetn pumps that "trap" whatever they are transporting and transport it to the outlet. these have a fixed transport volume that is linear to the rpm. some like gear or scew pumps can work in both ways.
Did the shaft break because that PETG material is weak, or would the same thing happen with PLA or ABS? I don't really know much about the properties of those materials under mechanical stress.
Can you make a portable jump starter for a car? I've been looking everywhere on how to make a simple one with 18650 cells
Can you show us how to make a alarm water sprayer for get up early in the morning..
Wtf?!? I looooove the motor controller board with the IC named Rocinante!!
It's the ship from the expanse, but u guys knew that already. It's a must watch show!