For the bearings not turning if you tighten the screws too much: You should put a spacer between the 3D printed cage and the bearing itself. The spacer will make sure the outer rings of the bearings are free, but the inner rings will be tight.
Excellent breakdown of what makes such a pump. It seems that building it from standard components is worth it if you don't have to model (at least not too much) the pump assembly from scratch. I'm in two minds, one side agrees with the diy, but considering the requirement to generate a 3D assembly means that perhaps it's not so clear. Either way I love this set of videos you're making. It's making me ask serious questions about the future of custom making and it's interesting to say the least. Thanks.
That's more true with a good 3D printer and a control system that allows you to turn it on and off without having to plug the cable... mine is a bit of a hassle to set up, especially bed levelling, which is very difficult (I still haven't accomplished it). I'll have to order the auto bed levelling device... I ordered it just a bit too early (there's a new version easier to use)...
The problem is that mine is a delta printer, an Anycubic Kossel Linear, to be exact. And you must use the screws in the linear actuators, then home, then do it again until it's leveled.
Seguramente no van a entender ni mierda de lo que estoy escribiendoles pero de todos modos les dejo el enlace para que ustedes lo hagan en casa, bueno me causa mucha pereza hacer lo de la traducción así que aquí les queda todos los pasos. ua-cam.com/video/X4BLydtpllo/v-deo.html
I have some previous experience with pumps like these, the rotary die cutter I used to operate had one for each print drum. The ones we used had the internal tubes connected to fixed couplings to the outside of the housing. Second, since the hoses had thinner walls so the motor didn't have to work so hard to compress them. Third, their were 3 hoses and the rotors were out of phase like 3 phase electric, meaning one larger motor is able to handle 3 times as much liquid. It's been a long time but if I remember correctly, the hoses we're t supported internally on the structure so the rotary would stretch them slightly improving compression. They were held on to the coupling with hose clamps. This might be more than what you need for this but that's more or less how the industrial variety is constructed.
Hi Scott, I worked for the company that made the "Britvic Drinks Dispencer". I don't know if you have heard of it or not, but it does not matter. Just to let you know that all materials used in it have to meet "Food Grade" quality control standards, that means BS, AMSE and TUV. Best to check out if your tubing meets those standards! Cheers.
Thanks for this video... I've been looking for a way to circulate water through a liebig condenser for months... I've been wasting my time trying to get washing machine drain pumps to do the job... Just happened to watch this video simply because it was a Great Scott video... and you're talking about these things I've never heard of "peristaltic pumps"... exactly what I've been looking for... I'm now the proud owner of an old peristaltic pump from an air conditioning unit and my condenser should be getting flooded with icy water any time soon... thanks and keep up The Great Work.
Good video as usual! However, I am concerned with your conclusion, the >500mL/min buy vs your ~200 mL/min diy, the fact that the 3D printed parts and bearings add to the cost and finally the "long life" of the diy is surely uncertain at this point. I don't see much if any advantage of DIYing this pump. What are your thoughts?
Well and consider the time (time=money) building it; its for sure more of a hassle to just buy it, but then again, if you once know, how its done.... it is an awesome project indeed, anyway.
He was speaking about the lifespan of the motor itself. That stepper motors appear to have a longer lifespan compared to DC motors of that budget class.
Hi, I really like your approach to technical issues and solutions. Your ability to explain what you are doing and why is excellent. And your handwriting is just enviably. From a 63 year old B.Sc.EE
Thanks for the inspiration! I made a much beefier version of your design to pump more viscous fluids. On the shaft getting a good fit: next time, undersize the hole slightly and heat the shaft to around melting temp. I just used a lighter for a few seconds. Then slide the shaft on. It's now a perfect fit the first time once it cools. The only negative seems to be slight puckering on the exit of the hole and some cleanup needed for some stray filament. Make sure it's not too hot so you don't burn the filament and ruin the hole!
Thank you for this, I had no idea such a pump existed - I have been working on a bike with broken steel head studs in the aluminium head that I had started eroding out using alum solution. The problem is that the solution needs to be warmed and flowing, the second problem is that all pumps I have have a steel shaft on the impeller would erode from the solution. This pump type would be ideal for my scenario as the lack of fluid contact with the mechanics is perfect. All other methods have failed to remove the studs, whereas even holding them in alum solution for a while using a rudimentary bath has started the process.
One way to ensure that the bearings do not get stuck while tightening the plastic holders is to add three washers that are just as large as the bearing's inner ring for each set of bearings. One will be placed in between the two bearings and the other two will be in between the plastic and the bearings. This way, you can tighten the bolts and ensure that the outer ring of the bearing is spinning instead of the whole bearing which can wear down the bolt. Another alternative is to modify the plastic holder design and add a lip or whatever it is called at the hole where the bearings will have contact with the plastic that is just large enough that the bearing's outer ring will not touch the plastic holder. You will then only need one washer in between the bearings when installing them,.
The idea of Peristaltic pump just solved my idea of slow water pumping for a small plant watering system. Thanks for the great content you keep making.
I think gauging the price at $15 is way off, once you factor in screws, filament, 3D printer (prototyping, rental, or self-bought) your total is higher than buying one. that being said, great video. and for next project you could look into building the Hakko T12 kit, it’s a cheap soldering iron DIY kit that gives you a professional quality setup.
Well, if you buy all the tools JUST for making this one thing, you can never be cheaper compared to the cost benefits of mass production. You buy these things, because you like to build things. And if you do it, because you like it as a hobby, your time doesn’t really go into the cost equation. Not for me anyway!
A lot of things are cheaper to DIY when you already own half the parts. I'd like to see price breakdowns by part (bill of materials) in comparison to the cheapest premade component available. This makes it really easy to subtract the parts you have or can make and come to your own conclusions... Though it's not the most entertaining thing to have in a video.
Have you tried moving liquids of different viscosities? It would be interesting to see if it can move oils, and even more viscous liquids, such as syrup, ketchup or something similar. Great work! Thank you for your hard work.
Thank you for your efforts on this project. I grow hydroponic lettuce in my home and looked into automating the nutrient solution mix. This is exactly what many commercial companies use - three to four of these pumps are required required. I found the commercial pump too expensive (purchase + repair cost) so I performed the mixing manually for some time -- and its a daily chore!. I will be using your design when I start the process back up. I have seen several comments that the pricing unjustified your DIY recommendation. For my two cents -- I would consider a one-to-one price match -- still recommending the DIY solution. When you put these pumps into operation (DIY or commercial), they will eventually fail. The cost of repair on the DIY model will be small but the commercial model will need to be a complete rebuy. Thanks again for an excellent article.
The motors does not stall faster with microsteps compared to full steps. And it runs a lot smoother with microstepping. So unless you have a really slow microcontroller it is best to use microstepping at 1/16 or 1/8
minitos1 +100!! As long as you are comfortable and SAFE working with high DC voltages upwards of 350V, it is a very rewarding project to take on. And the sound will leave you speechless... ;)
I work at a municipal water treatment plant. We use peristaltic pumps to add liquid chlorine (sodium hypo-chloride) to the water flow. They are self-priming, and they are cheap to replace the pumping tube when it wears out due to cycling, every six months or so.
Good point... If a DIY takes lets say 3 hours to make and saves me 20$ ... well, then i would buy it ... but if you have fun doing it it is ok if it takes 10 hours and saves you 5$ ;) if it feels like work its not worth it saving a few bucks but if it makes fun its worth it even if you dont save a dollar :) .... just my opinion :)
Why am I watching this in the middle of the night? This is beyond my skill level. Back to my normal blacksmithing videos. I still left a like for you because I like the idea.
Life Changing Realities Fellowship? Lung Cancer Research Foundation? I am talking about a simple yet educational electric circuit. It is also easy to make a video about. I have made a few prototypes and designed the PCB. All seem to work fine. You do have to have a digital oscilloscope though. Idea from ua-cam.com/video/3Y_WcuIenSM/v-deo.html
Not bad as long as you have a 3D printer (or are a good woodworker lol). How about a light switch/dimmer WiFi based to work with Alexa or Google for home automation and control LEDs. I’m guessing some type of 555 based system?? But my friend you are truly the expert! Thank you for sharing your knowledge!
Your video came at a most opportune time! I have a project that requires a peristaltic pump and your video was a wealth of information for me. Thank you very much!
By the way, you're the only person who designed a cocktail maker that uses weight and not some crazy flow measurement. I really thought that was pretty slick.
Better buy. Bcz you're here working with 100-240ac volt which can be lethal.. DIY won't gonna be last long.. I have a soldering iron. From last 4years It cost only 150rs to me.
May be way late but if you add small washers the size of the bearing hub, you can tighten them as much as you want and the bearings will spin freely as there won't be any friction against the bearing face, on only the hub. Really cool video!
Check out "lookmumnocomputers" channel to watch a crazy British mad scientist tweaker dude do such things. :D He made an organ it off Furbys and shows how to do basic modular synth stuff.
Excellent video well, crystal clear and well documented. One question: did you experience with peristaltic pump any problem of suction pressure? I mean, does your peristaltic pump prime itself, in the case the suction reservoir is at lower elevation than the pump itself? This could pose problems in case I use such pump to irrigate my garden using rain water recovered from roof, as the suction reservoir is installed (for obvious reasons) at a lower elevation (about 1 m) than the pump itself.
AVPHT you can easily hack sonoff devices and without voiding the guarantee for the use in 220V home circuits. And because they are mass produced - you will barly get them build cheater than that - i hacked a sonoff touch wall switch and it works great
Seems like this would be very easy to produce with a hole saw and drill bits using acrylic. Might have to give it a try, a peristatic pump would have saved me some real neck and head ache today. Was draining fluid out of a transmission that holds 14 liters of fluid and no drain plug. Without a pump the only way to drain it is to carefully loosen bolts on the catch pan until you get a nice consistent leak. Have to lay in an awkward position to reach all 32 of the bolts.
there's plenty other people who have loads more RC and 3D printing experience on youtube and they have already done 3D printed RC planes, I would rather see Scott stick to electronics :)
I'd love to see a DIY or buy for a parabolic microphone. I really like your videos especially your explanations with drawings. If I had any criticism it would be not relying on the 3D printer so much.
You can get significantly higher flow by using softer tube material (like PharMed BPT, which is designed for this very purpose) or by increasing tube diameter. That tube is very important part of the pump.
Nice work! I once created a standard turbine pump but it comes with a lot of leakage and wear of the parts. This one looks very good. I will try it rebuild it and finally water my plants automatically...
I have some P-Pumps and was looking for a resource on how to power/program flow rates on them for a project. Looks like I’ve found the right place to continue looking.
I used to work in a hospital, and we had patients who were fed by Nasal Gastric incubation.the Enteral feeding pumps [ Kangaroos,at the time ] used peristaltic pumps. but they must have had stepper motors, because the food medium [ Sustacal ] moved up the N.G tube in pulses, rather then a constant stream. but the kewl part was that the Pump head, protruded from the front of the unit. so you could remove the cover on the pump to insert a fresh tube when you hung a bag, with out needing any tools. I think they were turn locks, or thumb screws [ Don't remember it was in the late 80's.]
Hey GreatScott! Good job! that a good idea to compare these 2 solutions. But I not agree with you about the cost: 30$ for a peristaltic pump, whereas a diy project means 10$(motor)+5/10$(arduino)+2/5$(motor driver)+3Dprinting stuff+ building time =>I my opinion, this DIY project is more expensive than a bought product mounted and reliable. Anyway, the pump you made looks great!
And the filament including fails and additional helper structures, solder, time, electric power, some hair and or its color. Wait the screws are missing in the above list plus the tubing. Yes there is a completer list but still the content in my first sentence applies.
Microphone, amplifier circuit, bandpass filter, ear-bud speaker. (And compare the cost of those as they are to a device with something like FDA approval.)
The most useful aspect of peristaltic pumps is the predictability of flow rate. I'd like to see this pump with an optical encoder to detect and correct "slip", and a simple display that meters the resultant flow. A precision, variable, metered pump is an extremely useful device in many industries and hobbies. Off-shelf systems cost around $180, but they don't detect/correct stepper slip.
You realise the mechanic doesn't add the cost of his tool kit to your car service. The dentist doesn't add the cost of the x-ray machine to your checkup. Yes, they might include a small charge for these things, but it's the cost divided by the estimated number of times they'll use it in its expected service life, not the price they paid for it.
He also forgot to include the price of the computer(to order the buy pump) so the buy option is over $100 Point is, lots of DIYers have access to 3d printers, and you don't need to buy one per pump.
I built something similar like the Soda dispenser, but i used a Basic air pump to build up a pressure in the bottle which then "pumps" the water into the tube. i also put this metal Thing which protects a fan under the glass, which got filled, because a bit of liquid is alsways dropping out of the tube after shutting down the air pump. this water collects inside a bowl under the whole construction. it sounds complicated but is build very easily.
I'm going to make one, just for the experience, also to use the PCB sponsors of Mr Scott. But there is no way I could make one cheaper than the clones from China.
That's so crazy cuz I'm just starting to build your cocktail maker. My thoughts are since it doesn't really matter about motor control for the pump because your design, which is awesome, measures the alcohol and mixes by weight, I've decided to try to use cheaper gear motorz that you can find on eBay. I have some already for another project that are at about 300 RPM at 12 volts. I'll publish how mine come out
Hello. Imho 60% infill is way overkill. And is also a huge cost of filament. Using cubic infill, it should be enough to use between 10% and 20% infill. If your are looking for strength, you'll get solid part by increasing the wall count. A 4 walls, 15% cubic infill printed on a Prusa MK3 like yours is undestructible. Especially small parts like these. Have a good printing time ! Keep up the good work.
It seems that the speed of the rotor is the only limiting factor in its flow rate. Does it stop being reliable if the speed is increased even more? I mean, does the efficiency of the pumping decrease with speed higher than the one you demonstrated as maximum?
Idea for a future project HHO welding and soldering torch. Will a jewelers torch work? What's the safest way to store the gas? Will those kits that are a scam for cars work? Can you braze with it?
beautiful examination of the pump, congratulations! With a stepper motor you can control the number of revolutions and therefore the flow rate of the pump very precisely, which you can not do with a direct current motor See you next time
Great video, great project. I enjoyed watching. But it does make me appreciate the value of mass manufactured products for people who don't have the technical knowledge , skills or equipment like 3d printers, design software, computers etc
Ill bet you can print that pump also in PETG or PLA. If you are using a higher infill, or even also 60% with more perimeter and top/bottom layers, it will be very stable too. Maybe ill try printing that pump.
I like the DIY far better. If you are going for mL/min you need bigger tube or higher speed. But if you're aiming at precision I think stepper mottor is the only way to go. Think of nutrient solutions mixing or a pH doser/controller instead of juice vodka and your DIY pump(s) with Arduino/ESP32 and sensors are replacing a much much pricier solution. There are however NEMA powered peristatic pumps on Thingiverse for quite some time now. No solution is however aimed at reducing eletronics to drive multiple "channels" sequentially or reducing number of motors and having some gearbox instead.
Maybe I’m biased because I use them all the time at work but I always use Allen head bolts for my smaller projects. Especially socket cap screws, I love those things and I hate Philip’s head screws and bolts, just my opinion from my personal experience.
Really the answers to these should be what your time has to be worth for DIY to make sense (ideally, accounting for the impact making multiple units would have).
So I bought and printed everything showed in video and it doesn't work. I made sure everything can freely move and although it spins with some lags it won't pump anything. The water level in tube just swings back and forth and if I tighten everything a bit it stops moving. I don't know if that's wrong (it's not mentioned in video) but it makes a hell of noise while "pumping".
Great video. I think this is an easy BUY vs. DIY. I did not see you factor in labor as an opportunity cost. In other words, your time has value. I don't know how much time you spent making ONE peristaltic pump, but IF you spent 30 minutes of total labor time x 3 pumps = 1.5hrs labor . $15 savings/1.5hrs labor ~ $10/hr. My personal time is definitely worth MUCH more than $10/hr. BUY!
You reply to me thanks you im your greatest fans I watch your video over and over for fun just for support..he reply I'm never forget this day thanks Scott
I think according to me buy wins because not everybody can write arduino codes plus everybody doesn’t own a 3D printer. But this video is awesome for those who have all that available. Great video.
I wonder if the stepper motor has enough torque that it could run two or three sets of rollers and enclosures ganged up inline? Maybe it could be run slower and move more fluid or move two or three liquids at the same time
Hi Scott, Great video! Well explained and good to see the DIY won! Quick question, based on calculation, what would the flow rate be? Can you also tell us what the frequency of the stepper motor is? Last question, why did you select the 16 steps per rotation option. Wouldn't less give a higher rpm, don't know what the torque should be for driving, but I bet it should handle it well. Gives a higher flow rate. Once again, great vid!!
You could use small washers around the bearings so that the screws don't bind them. You know, just big enough to make contact only the inner race of the bearings.
Hello, Thanks for this Amazing video. How can you add the capacity to reverse the flow? Would you need a separate circuit board to be able to do it? Thanks again
Have you tested this to failure yet? How long does it last at different pumping levels? I only ask this because if I ever needed to do this at my work how long can it keep running consistently for?
I wonder if you could use this to make a pellet based extruder / hot end -- like, so you didn't need to use extruded filament, but instead could use injection molding pellets... -- just pump them into the melt zone with some thick teflon tubing... -- I guess retraction wouldn't work as well though...
so if u were to make say.. 3 roller pairs stacked, with 3 hoses, and let them go together at a t-joint or similar would that make for a more "stable" flow rate.. would it make it faster? would u need flowback valves in there? I have questions.. :D
I wonder if you could find a way to use more roller bearings to house more tubes, then have electrically actuated valves to close off the tubes when desired amount of fluid is achieved, coupled with a pressure actuated valve that goes to a return tube to the container. Basically combining multiple pumps into one for further cost savings.
For the bearings not turning if you tighten the screws too much: You should put a spacer between the 3D printed cage and the bearing itself. The spacer will make sure the outer rings of the bearings are free, but the inner rings will be tight.
Excellent breakdown of what makes such a pump. It seems that building it from standard components is worth it if you don't have to model (at least not too much) the pump assembly from scratch. I'm in two minds, one side agrees with the diy, but considering the requirement to generate a 3D assembly means that perhaps it's not so clear. Either way I love this set of videos you're making. It's making me ask serious questions about the future of custom making and it's interesting to say the least. Thanks.
Glad you liked it and thanks for the feedback :-)
Yes
That is what I’m saying. I like those videos
That's more true with a good 3D printer and a control system that allows you to turn it on and off without having to plug the cable... mine is a bit of a hassle to set up, especially bed levelling, which is very difficult (I still haven't accomplished it). I'll have to order the auto bed levelling device... I ordered it just a bit too early (there's a new version easier to use)...
The problem is that mine is a delta printer, an Anycubic Kossel Linear, to be exact. And you must use the screws in the linear actuators, then home, then do it again until it's leveled.
Next diy or buy make a 3D printer
Look up Cherry printer in youtube :)
Brian C thanks
Yeah !!! 3D printer using very chep Dvd writers .
That's been done to death
Seguramente no van a entender ni mierda de lo que estoy escribiendoles pero de todos modos les dejo el enlace para que ustedes lo hagan en casa, bueno me causa mucha pereza hacer lo de la traducción así que aquí les queda todos los pasos. ua-cam.com/video/X4BLydtpllo/v-deo.html
I have some previous experience with pumps like these, the rotary die cutter I used to operate had one for each print drum. The ones we used had the internal tubes connected to fixed couplings to the outside of the housing. Second, since the hoses had thinner walls so the motor didn't have to work so hard to compress them. Third, their were 3 hoses and the rotors were out of phase like 3 phase electric, meaning one larger motor is able to handle 3 times as much liquid. It's been a long time but if I remember correctly, the hoses we're t supported internally on the structure so the rotary would stretch them slightly improving compression. They were held on to the coupling with hose clamps. This might be more than what you need for this but that's more or less how the industrial variety is constructed.
Heart pacemaker. DIY OR BUY?
*DIE OR BUY?
Brutaltronics 😂😂
Do you know a surgeon who'd be willing to implant a home-made pacemaker?
@BertyFromDK. Who needs a Surgeon ?. DIY the surgery as well.
Paul Taylor now that's hardcore lol :D
Hi Scott, I worked for the company that made the "Britvic Drinks Dispencer". I don't know if you have heard of it or not, but it does not matter. Just to let you know that all materials used in it have to meet "Food Grade" quality control standards, that means BS, AMSE and TUV.
Best to check out if your tubing meets those standards! Cheers.
Happiness. DIY OR BUY?
You can print Happiness.
@@Sebastian_Koenig_ I saw what you did there
Buy is the only ans
You can say happiness
DIY
Thanks for this video... I've been looking for a way to circulate water through a liebig condenser for months... I've been wasting my time trying to get washing machine drain pumps to do the job... Just happened to watch this video simply because it was a Great Scott video... and you're talking about these things I've never heard of "peristaltic pumps"... exactly what I've been looking for... I'm now the proud owner of an old peristaltic pump from an air conditioning unit and my condenser should be getting flooded with icy water any time soon... thanks and keep up The Great Work.
Good video as usual! However, I am concerned with your conclusion, the >500mL/min buy vs your ~200 mL/min diy, the fact that the 3D printed parts and bearings add to the cost and finally the "long life" of the diy is surely uncertain at this point. I don't see much if any advantage of DIYing this pump. What are your thoughts?
Well and consider the time (time=money) building it; its for sure more of a hassle to just buy it, but then again, if you once know, how its done.... it is an awesome project indeed, anyway.
BUT... if you have a box of spare parts you have salvaged, you can creates a cheap DIY pump
He was speaking about the lifespan of the motor itself. That stepper motors appear to have a longer lifespan compared to DC motors of that budget class.
Hi,
I really like your approach to technical issues and solutions.
Your ability to explain what you are doing and why is excellent.
And your handwriting is just enviably.
From a 63 year old B.Sc.EE
Thanks for the feedback :-)
Thanks for the inspiration! I made a much beefier version of your design to pump more viscous fluids. On the shaft getting a good fit: next time, undersize the hole slightly and heat the shaft to around melting temp. I just used a lighter for a few seconds. Then slide the shaft on. It's now a perfect fit the first time once it cools. The only negative seems to be slight puckering on the exit of the hole and some cleanup needed for some stray filament. Make sure it's not too hot so you don't burn the filament and ruin the hole!
Thank you for this, I had no idea such a pump existed - I have been working on a bike with broken steel head studs in the aluminium head that I had started eroding out using alum solution. The problem is that the solution needs to be warmed and flowing, the second problem is that all pumps I have have a steel shaft on the impeller would erode from the solution. This pump type would be ideal for my scenario as the lack of fluid contact with the mechanics is perfect. All other methods have failed to remove the studs, whereas even holding them in alum solution for a while using a rudimentary bath has started the process.
One way to ensure that the bearings do not get stuck while tightening the plastic holders is to add three washers that are just as large as the bearing's inner ring for each set of bearings. One will be placed in between the two bearings and the other two will be in between the plastic and the bearings. This way, you can tighten the bolts and ensure that the outer ring of the bearing is spinning instead of the whole bearing which can wear down the bolt.
Another alternative is to modify the plastic holder design and add a lip or whatever it is called at the hole where the bearings will have contact with the plastic that is just large enough that the bearing's outer ring will not touch the plastic holder. You will then only need one washer in between the bearings when installing them,.
The idea of Peristaltic pump just solved my idea of slow water pumping for a small plant watering system. Thanks for the great content you keep making.
Make a Welder Inverter , that controls the amps , the duty cycle .
yankov_xxx360xxx_ TOTTALY AGREE WITH YOU
In a old video he did a transformer welder but it was really un finished and he said he will come back to that project , thats why i sugested it
Agreed! Would love to see that.
@Szakembőr TV TMIAE
thats the idea , not designing an inefficient transformer welder , but a high efficiency inverter welder !
ye make a inverter welder with pretty high duty cycle
I'm just about to start automating my tiny herb garden (for whenever I'm away for a while). Having a pump is a must. Thank you for this amazing video!
same!
I think gauging the price at $15 is way off, once you factor in screws, filament, 3D printer (prototyping, rental, or self-bought) your total is higher than buying one.
that being said, great video. and for next project you could look into building the Hakko T12 kit, it’s a cheap soldering iron DIY kit that gives you a professional quality setup.
I second on the soldering iron DIY.
Well, if you buy all the tools JUST for making this one thing, you can never be cheaper compared to the cost benefits of mass production. You buy these things, because you like to build things. And if you do it, because you like it as a hobby, your time doesn’t really go into the cost equation. Not for me anyway!
Zex Maxwe
This. 15 bucks seems a bit optimistic. Bearings usually aren't free either.
A lot of things are cheaper to DIY when you already own half the parts. I'd like to see price breakdowns by part (bill of materials) in comparison to the cheapest premade component available. This makes it really easy to subtract the parts you have or can make and come to your own conclusions... Though it's not the most entertaining thing to have in a video.
Someone PLEASE, give this an an award.
Have you tried moving liquids of different viscosities? It would be interesting to see if it can move oils, and even more viscous liquids, such as syrup, ketchup or something similar.
Great work! Thank you for your hard work.
Thank you for your efforts on this project. I grow hydroponic lettuce in my home and looked into automating the nutrient solution mix. This is exactly what many commercial companies use - three to four of these pumps are required required. I found the commercial pump too expensive (purchase + repair cost) so I performed the mixing manually for some time -- and its a daily chore!. I will be using your design when I start the process back up. I have seen several comments that the pricing unjustified your DIY recommendation. For my two cents -- I would consider a one-to-one price match -- still recommending the DIY solution. When you put these pumps into operation (DIY or commercial), they will eventually fail. The cost of repair on the DIY model will be small but the commercial model will need to be a complete rebuy. Thanks again for an excellent article.
Why are you using 1/16 steps instead of 1/2 or full steps so the motor can rotate faster?
It should increase the liquidflow per minute.
Asked myself the same question.
The motors does not stall faster with microsteps compared to full steps. And it runs a lot smoother with microstepping.
So unless you have a really slow microcontroller it is best to use microstepping at 1/16 or 1/8
Wankel Motor can you explain how 1/16 steps change the input signal of driver?
@@K.A7287 You need a higher frequency.
@@Theodisker thanx but my problem was that it was just a rule of thumb not an exact thing!of coarse higher frequency is going to make it run smoother.
I don't watch many videos, normally very focused on what I like to watch- but you pop up a lot - and every one is good. Well done
Thank you :-)
DIY or BUY: Tube amplifier?
I'd say DIY for sure. Been building tube amps for about a year now and it's been TOO much fun
minitos1 +100!! As long as you are comfortable and SAFE working with high DC voltages upwards of 350V, it is a very rewarding project to take on. And the sound will leave you speechless... ;)
Dagerman65 one would think you work with it turned off...
DIY or BUY: vacuum tubes
And then there's Ben Krasnow...
ua-cam.com/video/mUcUy7SqdS0/v-deo.html
I work at a municipal water treatment plant. We use peristaltic pumps to add liquid chlorine (sodium hypo-chloride) to the water flow. They are self-priming, and they are cheap to replace the pumping tube when it wears out due to cycling, every six months or so.
The work you put in is a cost too, how long did it take?
Casey Urquhart Why does it matter? He's doing it for fun. Do you charge yourself your free time?
Good point... If a DIY takes lets say 3 hours to make and saves me 20$ ... well, then i would buy it ... but if you have fun doing it it is ok if it takes 10 hours and saves you 5$ ;)
if it feels like work its not worth it saving a few bucks but if it makes fun its worth it even if you dont save a dollar :) .... just my opinion :)
But the learning you do is an income... so how do you factor that in?
Free since he earns it back by producing this video ;)
It's not cheaper anyway if you consider how much he is paying for flow rate. The BUY option has a lower price per mL/min
Why am I watching this in the middle of the night? This is beyond my skill level. Back to my normal blacksmithing videos.
I still left a like for you because I like the idea.
DIY or BUY LCR meter.(for use with oscilloscope maybe?)
No !!!! That should be LCRF atleast
Life Changing Realities Fellowship?
Lung Cancer Research Foundation?
I am talking about a simple yet educational electric circuit. It is also easy to make a video about. I have made a few prototypes and designed the PCB. All seem to work fine. You do have to have a digital oscilloscope though. Idea from ua-cam.com/video/3Y_WcuIenSM/v-deo.html
Not bad as long as you have a 3D printer (or are a good woodworker lol).
How about a light switch/dimmer WiFi based to work with Alexa or Google for home automation and control LEDs. I’m guessing some type of 555 based system?? But my friend you are truly the expert! Thank you for sharing your knowledge!
Will you post any videos on your second channel ??
Maybe.....
Your video came at a most opportune time! I have a project that requires a peristaltic pump and your video was a wealth of information for me. Thank you very much!
DIY is often an option if you have the tools. This project would have been very difficult without a 3D printer or some kind of mill.
I guess you could make those parts out of wood without that many problems :)
By the way, you're the only person who designed a cocktail maker that uses weight and not some crazy flow measurement. I really thought that was pretty slick.
Usb Soldering iron DIY Or Buy please
Good idea
Allwyn S but DIY OR BUY?
Allwyn S but i wants to watch..
Better buy. Bcz you're here working with 100-240ac volt which can be lethal..
DIY won't gonna be last long..
I have a soldering iron. From last 4years
It cost only 150rs to me.
New Here 1 but this can be dangerous
May be way late but if you add small washers the size of the bearing hub, you can tighten them as much as you want and the bearings will spin freely as there won't be any friction against the bearing face, on only the hub. Really cool video!
Hey greatscott, could you build a synthesizer or something similar? That would be great
You could build a simple one like the one here. musicfromouterspace.com/analogsynth_new/ALIENSCREAMER/ALIENSCREAMER.php
Check out "lookmumnocomputers" channel to watch a crazy British mad scientist tweaker dude do such things. :D He made an organ it off Furbys and shows how to do basic modular synth stuff.
hackeritalics holy shit I love that guy
that will be awesome
Excellent video well, crystal clear and well documented. One question: did you experience with peristaltic pump any problem of suction pressure? I mean, does your peristaltic pump prime itself, in the case the suction reservoir is at lower elevation than the pump itself? This could pose problems in case I use such pump to irrigate my garden using rain water recovered from roof, as the suction reservoir is installed (for obvious reasons) at a lower elevation (about 1 m) than the pump itself.
diy wireless relay for home automation or buy
AVPHT you can easily hack sonoff devices and without voiding the guarantee for the use in 220V home circuits. And because they are mass produced - you will barly get them build cheater than that - i hacked a sonoff touch wall switch and it works great
Seems like this would be very easy to produce with a hole saw and drill bits using acrylic. Might have to give it a try, a peristatic pump would have saved me some real neck and head ache today. Was draining fluid out of a transmission that holds 14 liters of fluid and no drain plug. Without a pump the only way to drain it is to carefully loosen bolts on the catch pan until you get a nice consistent leak. Have to lay in an awkward position to reach all 32 of the bolts.
Can you make Rc 3D printed plane????? Great video!!!
Interesting !!
I think Great Scott will read..
Wouldn't that be a bit to heavy?
these guys 3dlabprint.com already do 3d printed planes! if you search on youtube you will find reviews of them.
there's plenty other people who have loads more RC and 3D printing experience on youtube and they have already done 3D printed RC planes, I would rather see Scott stick to electronics :)
I'd love to see a DIY or buy for a parabolic microphone. I really like your videos especially your explanations with drawings. If I had any criticism it would be not relying on the 3D printer so much.
Make a diy EEG circuit under budget
You can get significantly higher flow by using softer tube material (like PharMed BPT, which is designed for this very purpose) or by increasing tube diameter.
That tube is very important part of the pump.
WiFi controlled wall socket - DIY or Buy
Nice idea
Nice work! I once created a standard turbine pump but it comes with a lot of leakage and wear of the parts. This one looks very good. I will try it rebuild it and finally water my plants automatically...
Why not a simple dc motor ??
longlife...
But it would have reduced cost even more
Exactly
I have some P-Pumps and was looking for a resource on how to power/program flow rates on them for a project. Looks like I’ve found the right place to continue looking.
"DIY or Buy" Lab Pwer Supply
Buy.. If you want to make. you should have constant voltage/constant current, short circuit protection. So it take some time :)
@@Passco666 a pc PSU has all that
@@amelliamendel2227 it supplies maximum 12v
Notification pressed faster than light speed
Kyliou 301 Good doggo
Bruce John Speedster is not mine :(
I used to work in a hospital, and we had patients who were fed by Nasal Gastric incubation.the Enteral feeding pumps [ Kangaroos,at the time ] used peristaltic pumps. but they must have had stepper motors, because the food medium [ Sustacal ] moved up the N.G tube in pulses, rather then a constant stream. but the kewl part was that the Pump head, protruded from the front of the unit. so you could remove the cover on the pump to insert a fresh tube when you hung a bag, with out needing any tools. I think they were turn locks, or thumb screws [ Don't remember it was in the late 80's.]
Diy or buy CNC. Or 3d printer. If u can manage it with your other projects and if you have the time. Plss like if u agree
Plus, maybe go for an entirely 3d printed 3d printer? (except for motors and extruders)
LED plant growing lamps would be a good one and topical to this time of year for many of your viewers.
2:28 Yes !! my guess was right !! On FB GS post
Congrats!
GreatScott! Thks for reply
Stop putting spaces before sentence ending punctuation!
My Grammar didn't Teach me That :)
Hey GreatScott! Good job! that a good idea to compare these 2 solutions. But I not agree with you about the cost: 30$ for a peristaltic pump, whereas a diy project means 10$(motor)+5/10$(arduino)+2/5$(motor driver)+3Dprinting stuff+ building time =>I my opinion, this DIY project is more expensive than a bought product mounted and reliable. Anyway, the pump you made looks great!
Well, first, you have to spend money to buy a 3D printer!
And the filament including fails and additional helper structures, solder, time, electric power, some hair and or its color. Wait the screws are missing in the above list plus the tubing. Yes there is a completer list but still the content in my first sentence applies.
These days its common to have 3D printer at home, at least some friend should have one.
A 3D printer is likely an investment that will pay back over time, provided that you build enough useful projects with it ;)
In my industry we put grease on the rollers and the silicone tube. This greatly extends life of the tube.
Spot Welder Buy or DIY
Please check out the UA-cam videos for Spot welder car battery. there are great cheap and easy projects out there
Awesome work, man! A guy here from Brazil made a pump like that too, but with pvc boards he made himself from pvc tubes. 😀
Hearing Aid: DIY or Buy
What?
I totally agree, they are very expensive. I made my brother a DIY Hearing Aid but it caches noise too. Hopefully Scott reads this.
Microphone, amplifier circuit, bandpass filter, ear-bud speaker. (And compare the cost of those as they are to a device with something like FDA approval.)
For me the winner is the diy cause it help us awaken our creativity thank u very much man
You forgot include the 3d printer cost...
Joel Carvalho you can let local hackerspace or printing farm to print the parts for you
Matěj Kadlec In Brazil we don't have those stuff 😂😂😂
160$ on gearbest :))
I bought a printer recently complete for 200 ready out of box. I think they are as realistic now for the home shop as a soldering iron or table saw.
mirrored window where?
The most useful aspect of peristaltic pumps is the predictability of flow rate. I'd like to see this pump with an optical encoder to detect and correct "slip", and a simple display that meters the resultant flow. A precision, variable, metered pump is an extremely useful device in many industries and hobbies. Off-shelf systems cost around $180, but they don't detect/correct stepper slip.
I think you forgot to add cost of 3d printer...
Thats a one time investment not counts for the price of a pumpm
You realise the mechanic doesn't add the cost of his tool kit to your car service. The dentist doesn't add the cost of the x-ray machine to your checkup.
Yes, they might include a small charge for these things, but it's the cost divided by the estimated number of times they'll use it in its expected service life, not the price they paid for it.
He also forgot to include the price of the computer(to order the buy pump) so the buy option is over $100
Point is, lots of DIYers have access to 3d printers, and you don't need to buy one per pump.
I built something similar like the Soda dispenser, but i used a Basic air pump to build up a pressure in the bottle which then "pumps" the water into the tube. i also put this metal Thing which protects a fan under the glass, which got filled, because a bit of liquid is alsways dropping out of the tube after shutting down the air pump. this water collects inside a bowl under the whole construction. it sounds complicated but is build very easily.
Arduino DIY or BUY
Emil Racovita of course BUY
Emil Racovita Buy... i never had any issues with those cheap arduinos from china.
I'm going to make one, just for the experience, also to use the PCB sponsors of Mr Scott. But there is no way I could make one cheaper than the clones from China.
better buy..
already made a diy arduino with built in microphone switch ldr potentionmeter led etc.
I am a great fan of you. The way you explain is wonderful.
That's so crazy cuz I'm just starting to build your cocktail maker. My thoughts are since it doesn't really matter about motor control for the pump because your design, which is awesome, measures the alcohol and mixes by weight, I've decided to try to use cheaper gear motorz that you can find on eBay. I have some already for another project that are at about 300 RPM at 12 volts. I'll publish how mine come out
Hello. Imho 60% infill is way overkill. And is also a huge cost of filament.
Using cubic infill, it should be enough to use between 10% and 20% infill. If your are looking for strength, you'll get solid part by increasing the wall count.
A 4 walls, 15% cubic infill printed on a Prusa MK3 like yours is undestructible. Especially small parts like these.
Have a good printing time ! Keep up the good work.
It seems that the speed of the rotor is the only limiting factor in its flow rate. Does it stop being reliable if the speed is increased even more? I mean, does the efficiency of the pumping decrease with speed higher than the one you demonstrated as maximum?
I found the part in a deskjet printer that I salvaged and was not sure how it is used. Now is a good time to try it. thx for the video
Idea for a future project HHO welding and soldering torch. Will a jewelers torch work? What's the safest way to store the gas? Will those kits that are a scam for cars work? Can you braze with it?
beautiful examination of the pump, congratulations!
With a stepper motor you can control the number of revolutions and therefore the flow rate of the pump very precisely, which you can not do with a direct current motor
See you next time
YES! I've been waiting for the DIY as a winner for months! It might be suitable when I will build a DIY lassi machine. Thanks, Scott.
I'd be interested in a long term view of that printed pump an a comparison with the ones to buy.
How is it working after a year or two?
Great video, great project. I enjoyed watching.
But it does make me appreciate the value of mass manufactured products for people who don't have the technical knowledge , skills or equipment like 3d printers, design software, computers etc
Ill bet you can print that pump also in PETG or PLA. If you are using a higher infill, or even also 60% with more perimeter and top/bottom layers, it will be very stable too. Maybe ill try printing that pump.
I like the DIY far better. If you are going for mL/min you need bigger tube or higher speed. But if you're aiming at precision I think stepper mottor is the only way to go. Think of nutrient solutions mixing or a pH doser/controller instead of juice vodka and your DIY pump(s) with Arduino/ESP32 and sensors are replacing a much much pricier solution. There are however NEMA powered peristatic pumps on Thingiverse for quite some time now.
No solution is however aimed at reducing eletronics to drive multiple "channels" sequentially or reducing number of motors and having some gearbox instead.
Ein wichtiger Punkt der für die DIY Version spricht ist der der Fakt das man die Komponenten in anderen Projekten besser wiederverwenden kann
Maybe I’m biased because I use them all the time at work but I always use Allen head bolts for my smaller projects. Especially socket cap screws, I love those things and I hate Philip’s head screws and bolts, just my opinion from my personal experience.
For long the best "DIY or Buy" episode. Awesome!
Thanks
Scott, add a small washer between the bearings and plastic and u can tighten it.
Really the answers to these should be what your time has to be worth for DIY to make sense (ideally, accounting for the impact making multiple units would have).
DIY less expensive! How much did the 3d printer cost for the 3d printed parts?
So I bought and printed everything showed in video and it doesn't work. I made sure everything can freely move and although it spins with some lags it won't pump anything. The water level in tube just swings back and forth and if I tighten everything a bit it stops moving. I don't know if that's wrong (it's not mentioned in video) but it makes a hell of noise while "pumping".
Hey - chalk one up to DIY! Nice video - the DIY option provides you a path for different sizes and flow options that you don' t get with 'buy'.
Great video. I think this is an easy BUY vs. DIY. I did not see you factor in labor as an opportunity cost. In other words, your time has value. I don't know how much time you spent making ONE peristaltic pump, but IF you spent 30 minutes of total labor time x 3 pumps = 1.5hrs labor . $15 savings/1.5hrs labor ~ $10/hr. My personal time is definitely worth MUCH more than $10/hr. BUY!
scott your like the greatest thing on youtube ...i wait every sundays at about 11:00 for your video your the greatest
You're welcome :-)
You reply to me thanks you im your greatest fans I watch your video over and over for fun just for support..he reply I'm never forget this day thanks Scott
I think according to me buy wins because not everybody can write arduino codes plus everybody doesn’t own a 3D printer. But this video is awesome for those who have all that available. Great video.
I wonder if the stepper motor has enough torque that it could run two or three sets of rollers and enclosures ganged up inline? Maybe it could be run slower and move more fluid or move two or three liquids at the same time
Hi Scott,
Great video! Well explained and good to see the DIY won!
Quick question, based on calculation, what would the flow rate be? Can you also tell us what the frequency of the stepper motor is?
Last question, why did you select the 16 steps per rotation option. Wouldn't less give a higher rpm, don't know what the torque should be for driving, but I bet it should handle it well.
Gives a higher flow rate.
Once again, great vid!!
Another good reason to use the stepper motor is that they are much more precise and constant in speed than normal dc motors.
You could use small washers around the bearings so that the screws don't bind them. You know, just big enough to make contact only the inner race of the bearings.
Hello, Thanks for this Amazing video. How can you add the capacity to reverse the flow? Would you need a separate circuit board to be able to do it?
Thanks again
Have you tested this to failure yet? How long does it last at different pumping levels? I only ask this because if I ever needed to do this at my work how long can it keep running consistently for?
How about high power flashlight diy or buy?
My first viewing of the DIY series. Fantstisch!!!! Ausgezeichnet!
Do you think you could add more pump lines, or will it be too much for the motor? Maybe increase the flow rate.
I wonder if you could use this to make a pellet based extruder / hot end -- like, so you didn't need to use extruded filament, but instead could use injection molding pellets... -- just pump them into the melt zone with some thick teflon tubing... -- I guess retraction wouldn't work as well though...
Depends on how much equipment and parts you already have on hand. Arduino, tubing, and the stepper motor is already more than just buying a the pump.
so if u were to make say.. 3 roller pairs stacked, with 3 hoses, and let them go together at a t-joint or similar would that make for a more "stable" flow rate.. would it make it faster? would u need flowback valves in there? I have questions.. :D
I wonder if you could find a way to use more roller bearings to house more tubes, then have electrically actuated valves to close off the tubes when desired amount of fluid is achieved, coupled with a pressure actuated valve that goes to a return tube to the container.
Basically combining multiple pumps into one for further cost savings.