We built a cocktail mixing machine 15 years ago at university. We used aquarium pumps to pump air into the top of liquor bottles. The higher pressure then moved the liquid through a thin hose to the cup. This way the liquids never come in contact with the pump and it's easy to control / dose.
@@ibaron2716it would've. The air pressure being higher up top with force liquid to move which will then force the air at the bottom to move past the liquid. The only problem I could see with this is over pressurising the container.
Holy god. That was an impressive build before you added "Oh and there's an automatic drill and dust collector in here DONT WORRY ABOUT IT" Very neat. And yes, those tiny motor driver boards tend to handle a lot less than they say they're rated for. The rating in a lot of listing is peak current. I exclusively get ones with thermal shutoff and automatic restart nowadays. They're usually only a few bucks more, but will start working again quickly if overheated.
@@BuiltDifferentDesigns aw man that sucks! As another person stated, replace them with TMC drivers, add a 40mm fan on the heatsink and you'll be good. Whisper quiet too!
A better way to pump drinks is to have the drink in a sealed chamber (such as a plastic bottle) and then pump air into the bottle, forcing the liquid out of a tube that is submerged in the liquid
@@brenisdank7097 I think this solution could be used alongside the original pre portioned spouts in the video. By pressurizing the bottle, I think the surface tension would be overcome and flow into the spout without issue. It'd probably be smart to add a pressure relief valve to the bottle just in case so you do not blow out the spout.
in bio chem lab equipment. they often use peristaltic pump to move fluid without pump component contaminating the fluid culture. Since it move the fluid by contract the tubing from the outside. It move fluid at a predictable linear flow rate and has added benefit of a built in valve through tubing contraction. The pump cost about 5 bucks and you can get food safe tubing for around 6 bucks. Normally the downside is tubing get wear down from repeat contraction and require frequent replacement of the tubing. But since your use case is one time, longevity is not a concern. You might want to consider use a peristaltic pump instead for your next project.
Excellent integration of the hydrocoptic marzlevanes with the x-y coordinate ambifacient waneshaft! Side fumbling in the cup's differential girdlespring seems to be effectively prevented.
I think the best solution might be a two stage pumping system using peristaltic pumps to prime an internal reservoir that fills cups via gravity. That way you have fast turnover of drinks, low heat for electronics, and easy change of bottles. And maybe less expense for food grade parts.
This is such a cool a well done project. Good job! I've had problems with those red little motor drivers as well. And as someone who works in industrial automation I appreciate the Estop button.
As an engineering student, I appreciate you taking the time to explain your decision-making process. Fair to many TH-cam makers neglect the importance of the decision-making process, especially in the early stages of a project. But I was wondering why you chose a gantry instead of a conveyor, screw, or turn table?
It’s a great video, but there’s something I don’t get: Why not use peristaltic pumps and a simple flow sensor (if needed)? I love your explanations and ideas. You treat your viewers like we actually want to learn. I also love that you show us all the problems and your process of solving them.
The big thing that I found when researching peristaltic pumps is that the flow rates were somewhat low. I needed to dispense 250 ml of fluid in a few seconds. The upside, though, is the consistency of the flow rate. The machine that I saw used parastaltic pumps for the mixers it worked pretty well for the non carbonated mixers, just slow. Carbonated mixers, however, didn't have the best performance. As the fluid sat in the lines, the CO2 would come out of solution and stall the pump. Hope that sheds some light on my thought process. Thanks for watching!
You applied so many things i could never understand to make the over engineered drink dispensers with way to many points of failure There was no need for tokens, big bright drink buttons would have worked, the cup did not need to move if you piped each bottle to dispense in same locations and how wasnt there a single solenoid valve on this build, you just need two cups on a scale one to be your measuring cup, counter balanced by an almost full measurement cup, when your actual mesurement cup it filled it becomes heavier then the counter weight cup lifting of a button triggering the solenoid to shut off the suplly valve moving this into a ready to tip state, all you need to do now is tip the mesured drink into a funnel into a small pipe or tubing to go to the cup once empty the counterweight will drop opining a valve to begin refilling. And buttons just tip all required drinks at the same time. The electronics would be simple all mesurement would be its own isolated piece per bottle, you could use a second button underneath where a full measured amount would be to check if it was ready then drink buttons would trigger check if required drinks are in ready staus then tip it
In a university project we faced a similar issue. We errent willing to spend the money on a food safe pump, so we went with an airpump and a filter. Instead of direftly pumping the liquid, we pumper air into the bottles, which then in turn would displace roughly the same volume of liquid. We had to cast some "universal corks" with tubes embedded to fit a multitude of bottles, and sparkling drinks created an issue. They would just build up pressure and drizzle, but we circumvented that by depressurising the system while the pump wasnt running. Overall it worked quite well. And it was a lot easier to clean, since the only parts where liquid actually was being pumped through was from the bottle to the nozzle, no solenoids or pumps came into contact with the liquid
The dispensers usually are forced up then drop when the glass is taken away helping break the surface tension (mounting points are generally kinda flimsy and bend up with the applied force). Helps break the surface tension, although have seen air blocking it be an issue.
Keep working on it! Replace the motor drivers with better ones, add a weigh scale to the cup holder, maybe make threaded adapters for different types of bottles so you can use the ones off the shelf instead of the plastic bottles. Maybe add a metal straw that goes all the way up to the top (bottom) to replace the air in the bottle. Try microstepping to make the motors quieter, find the resonances of your frame that make it rattle loudly and avoid those in your drive controller.
Another way you can do it is instead of taking the cup to the drinks - take the drinks to the cup. Ie - increase the height of the drink bottles, and put a pipe from the drinks (output) to where the cup is. Thus getting rid of the motors .... Just put a lil door that closes instead - which could be controlled by a servo Then you can also dispense multiple at the same time - thus increasing dispense rate. - in your case, it just looked like singles. But say you do double - 2 of each drink (could stack on top of eachother or what not) But you can dispense twice as fast - or .... if you only start dispensing twice as fast after a few - then you can actually change the empty while the other is still busy/has liquid - so 1st empties, second empties and then both swapped - no downtime
I built myself a cocktail bot too. Although i went with the choice of pumps. My experience was that it is much faster and actually cheaper for most cases. Also less moving parts that are exposed- also i wasn't able to build a gantry :D Id love to discuss the thought process behind our both machines with you
You make one 10 minute video of project this size? Other youtubers would make 5 to 10 episode series even smaller projects. It would be awesome to see more detailed what you are doing. You spent so much time with these, why let people see so little?
Hello, very cool video, I've wanted to build a machine like this for a long time, the dispensers are a cool idea. I can recommend the TMC2209 as a stepper motor driver, then the motors won't make such weird loud noises. Could you maybe publish the CAD files and a rough parts list. Thank you!
If you are really picky about motion accuracy, I recommend against the 2209. It only works properly if you turn off the fancy mode. When it automatically mode-switches (all the time without telling you) there is a motion error.
thinking about other ways than peristaltic to do a pump setup, what about putting each fluid in a large syringe? they're naturally designed to be food-safe, looks like you can get .5L ones pretty easily, larger with some searching perhaps. each one then just needs a tube to the cup location, and the flow is controlled precisely by moving the plunger (perhaps with a mechanically multiplexed actuator, since you might want a *lot* of syringes, though individual actuators could massively speed up dispensing)
My imeadiate thought to the trilema would be why not just use an automated valve and flexible food grade tubing? Sourcing might be a pain but surely not more than making a Cartesian gantry system, not to mention lowering the points of failure.
I wonder: couldnt you have used the dispensing cap thingys connected to some tubing and just pipe everything into one spot? And then just have servos actuate the caps...
Nice channel, always fun to see engineers with a sense of humour :D Reminds me of one guy making an "oils searching" robot for someones housewarming party. They had put an expensive natural oak floor in their house. And the robot was designed to randomly drive around and stop every few meters, drill a hole, and stick a flag in it - "There is no oil here!"
Thanks for watching! The big thing I found when looking at peristaltic pumps was flow rate. I was looking to dispense 250ml of fluid in somewhere around 5-10 seconds. I didn't find many 1500-3000 ml/min pumps that looked right for me. Parastaltic pumps do have the upside of consistent flow rate through so maybe if I found the right pump?
Pretty cool Idea. I was wondering about your cost. Since the price of the alc. dispenser + the electronic and the servo are not that cheap. Especially if a foodsafe 500ml/min pump cost around 35€. And if your were concerned with the price of the build, why didn't you, or did you, try to use a servo for multiple dispenser?. I mean from a design point, I really like your dispenser design especially the locking mechanism and the contact plate. A cocktail machine is definitley also on my todolist.
why not just put the bottles on a piece of hose and have vertical mounts for the bottles, then you can just take the bottle down flip it and take the hose off and swap bottles you could even add a ball valve
Did you use dosing pumps? I just started the video, but dosing pumps are what you might need. Edit: You definitely should have gone with dosing pumps, you can even make them with stepper motors and 3d printed parts only requiring medical grade IV hoses and some bearings
The big thing that I found when researching peristaltic pumps is that the flow rates were somewhat low. I needed to dispense 250 ml of fluid in a few seconds. The upside, though, is the consistency of the flow rate. Hope that sheds some light on my thought process. Thanks for watching!
6:05 Not enough gravity for the liquid, caused by partial vacuum in the bottle. I see no way for air to get back in the bottle after drooling out the liquid.
Hey, genius. You don't need to move the cup with servos and you don't need pumps. Just dispense the liquids and let a large funnel bring it to the cup. Think smarter, not harder.
You would then get mixings of ingredients which wouldn't be good for kids getting non alcoholic drinks or potential allergy issues. Also that's nowhere near as cool or has as much showmanship as this design.
@@braedenhunt3677 Easy problem to solve. Since the machine is so much simpler, you can build a second one for non-alcoholic beverages and still come out ahead. And as for people with allergies, add a epinephrine option or simply tell them to drink bottled water.
@@braedenhunt3677 You could also have a rinse basin so after a drink is dispensed the funnel is flushed out with clean water. That's still less complex than moving the cups. On the other hand, I think it looks way cooler to have the cup go for a little ride. The rube goldberg aspect of it is what makes it interesting.
Great Video once again.
Interesting how far is the gap between "it works in my tests" versus "it works when it matters".
So true
We built a cocktail mixing machine 15 years ago at university. We used aquarium pumps to pump air into the top of liquor bottles. The higher pressure then moved the liquid through a thin hose to the cup. This way the liquids never come in contact with the pump and it's easy to control / dose.
I wonder if this would've worked to overcome the surface tension issue mentioned.
@@ibaron2716it would've. The air pressure being higher up top with force liquid to move which will then force the air at the bottom to move past the liquid. The only problem I could see with this is over pressurising the container.
Holy god. That was an impressive build before you added "Oh and there's an automatic drill and dust collector in here DONT WORRY ABOUT IT"
Very neat. And yes, those tiny motor driver boards tend to handle a lot less than they say they're rated for. The rating in a lot of listing is peak current. I exclusively get ones with thermal shutoff and automatic restart nowadays. They're usually only a few bucks more, but will start working again quickly if overheated.
I got the cheap ones and ran them at 40% of rated current. Lesson learned
@@BuiltDifferentDesigns And please consider some TMC2209's or other stealthchop driver, they're so much quieter.
@@BuiltDifferentDesigns aw man that sucks! As another person stated, replace them with TMC drivers, add a 40mm fan on the heatsink and you'll be good. Whisper quiet too!
Like self-driving cars, bartending robots are feasible if an “attendant” is present.
A better way to pump drinks is to have the drink in a sealed chamber (such as a plastic bottle) and then pump air into the bottle, forcing the liquid out of a tube that is submerged in the liquid
This would work but wouldn't be accurate right?
@@brenisdank7097 I think this solution could be used alongside the original pre portioned spouts in the video. By pressurizing the bottle, I think the surface tension would be overcome and flow into the spout without issue. It'd probably be smart to add a pressure relief valve to the bottle just in case so you do not blow out the spout.
in bio chem lab equipment. they often use peristaltic pump to move fluid without pump component contaminating the fluid culture. Since it move the fluid by contract the tubing from the outside. It move fluid at a predictable linear flow rate and has added benefit of a built in valve through tubing contraction. The pump cost about 5 bucks and you can get food safe tubing for around 6 bucks. Normally the downside is tubing get wear down from repeat contraction and require frequent replacement of the tubing. But since your use case is one time, longevity is not a concern. You might want to consider use a peristaltic pump instead for your next project.
The problem is that affordable peristaltic Pumps are very slow. It would take quite a lot of time for a drink of 0.4L
Excellent integration of the hydrocoptic marzlevanes with the x-y coordinate ambifacient waneshaft! Side fumbling in the cup's differential girdlespring seems to be effectively prevented.
...the what what?
@@sumynona.01 th-cam.com/video/RXJKdh1KZ0w/w-d-xo.html
Rockwell Retro Encabulator
All that and only an exponential casing. I have no idea how he masę that work
I think the best solution might be a two stage pumping system using peristaltic pumps to prime an internal reservoir that fills cups via gravity. That way you have fast turnover of drinks, low heat for electronics, and easy change of bottles. And maybe less expense for food grade parts.
expensive food grade pumps not necessary. peristaltic pumps my guy. they are so cheap.
thats what i came here to say.
Yep, would have made everything so much easier
and there's several ready-to-print solutions that you can connect to a drill
This is such a cool idea! Congratulations on your marriage!
This is such a cool a well done project. Good job! I've had problems with those red little motor drivers as well. And as someone who works in industrial automation I appreciate the Estop button.
As an engineering student, I appreciate you taking the time to explain your decision-making process. Fair to many TH-cam makers neglect the importance of the decision-making process, especially in the early stages of a project. But I was wondering why you chose a gantry instead of a conveyor, screw, or turn table?
It’s a great video, but there’s something I don’t get:
Why not use peristaltic pumps and a simple flow sensor (if needed)?
I love your explanations and ideas. You treat your viewers like we actually want to learn. I also love that you show us all the problems and your process of solving them.
The big thing that I found when researching peristaltic pumps is that the flow rates were somewhat low. I needed to dispense 250 ml of fluid in a few seconds. The upside, though, is the consistency of the flow rate.
The machine that I saw used parastaltic pumps for the mixers it worked pretty well for the non carbonated mixers, just slow. Carbonated mixers, however, didn't have the best performance. As the fluid sat in the lines, the CO2 would come out of solution and stall the pump.
Hope that sheds some light on my thought process. Thanks for watching!
Shameless clickbait smh. Best wedding ever 💅
I freaking love this. Tricking me into learning something while showing off this cool build. Top notch stuff!
This is pretty cool! I would love it if you were able to open source the design or even put it behind a paywall or something, so I could make my own!
Congratulations on your marriage, hope all goes well.
The lesson here is : always bring replacement parts ! (Although I have no idea how much these cost, that may have been too expensive)
Yea that was one thing that didn't make it into the video. I had replacement parts but I could not find them 😖
Loved the 3Blue1Brown's Manim style video!
You applied so many things i could never understand to make the over engineered drink dispensers with way to many points of failure
There was no need for tokens, big bright drink buttons would have worked, the cup did not need to move if you piped each bottle to dispense in same locations and how wasnt there a single solenoid valve on this build, you just need two cups on a scale one to be your measuring cup, counter balanced by an almost full measurement cup, when your actual mesurement cup it filled it becomes heavier then the counter weight cup lifting of a button triggering the solenoid to shut off the suplly valve moving this into a ready to tip state, all you need to do now is tip the mesured drink into a funnel into a small pipe or tubing to go to the cup once empty the counterweight will drop opining a valve to begin refilling. And buttons just tip all required drinks at the same time.
The electronics would be simple all mesurement would be its own isolated piece per bottle, you could use a second button underneath where a full measured amount would be to check if it was ready then drink buttons would trigger check if required drinks are in ready staus then tip it
In a university project we faced a similar issue. We errent willing to spend the money on a food safe pump, so we went with an airpump and a filter.
Instead of direftly pumping the liquid, we pumper air into the bottles, which then in turn would displace roughly the same volume of liquid.
We had to cast some "universal corks" with tubes embedded to fit a multitude of bottles, and sparkling drinks created an issue. They would just build up pressure and drizzle, but we circumvented that by depressurising the system while the pump wasnt running.
Overall it worked quite well. And it was a lot easier to clean, since the only parts where liquid actually was being pumped through was from the bottle to the nozzle, no solenoids or pumps came into contact with the liquid
As soon as I heard how loud those stepper drivers were, I knew they were going to be a problem 😆
The dispensers usually are forced up then drop when the glass is taken away helping break the surface tension (mounting points are generally kinda flimsy and bend up with the applied force). Helps break the surface tension, although have seen air blocking it be an issue.
That modular design was super overengineered when an inline valve could have been used instead lol
Keep working on it! Replace the motor drivers with better ones, add a weigh scale to the cup holder, maybe make threaded adapters for different types of bottles so you can use the ones off the shelf instead of the plastic bottles. Maybe add a metal straw that goes all the way up to the top (bottom) to replace the air in the bottle. Try microstepping to make the motors quieter, find the resonances of your frame that make it rattle loudly and avoid those in your drive controller.
Another way you can do it is instead of taking the cup to the drinks - take the drinks to the cup.
Ie - increase the height of the drink bottles, and put a pipe from the drinks (output) to where the cup is.
Thus getting rid of the motors ....
Just put a lil door that closes instead - which could be controlled by a servo
Then you can also dispense multiple at the same time - thus increasing dispense rate.
- in your case, it just looked like singles.
But say you do double - 2 of each drink (could stack on top of eachother or what not)
But you can dispense twice as fast - or .... if you only start dispensing twice as fast after a few - then you can actually change the empty while the other is still busy/has liquid
- so 1st empties, second empties and then both swapped - no downtime
Lesson learned: Drinks on tap
Stretch goal: Read datasheet on cooling requirements not youtube videos and diy 3d printer guides.
Congratulations and all the best to the newlyweds!
Amazing video I can't wait to see what you make next.
Awww. Perfect project
Very cool! I actually built a bartending robot not too long ago! Yours is much better than mine I must say though!
i would have used Air pressure to push the fluid out of its bottles.
Wow that stretch goal is pretty cool
are you one of those guys who looks 10 years younger than reality, major Jimmy from Donut Media vibes
Awesome videos. I just found your account and i live them
No lime vodka or tequila sunrise ? Not my cup of drinks.
I built myself a cocktail bot too. Although i went with the choice of pumps. My experience was that it is much faster and actually cheaper for most cases.
Also less moving parts that are exposed- also i wasn't able to build a gantry :D
Id love to discuss the thought process behind our both machines with you
Great work man! i can see videos like this getting 465,230 views, keep it up!
You make one 10 minute video of project this size? Other youtubers would make 5 to 10 episode series even smaller projects. It would be awesome to see more detailed what you are doing. You spent so much time with these, why let people see so little?
A scale under the cup might have helped with measuring/timing how long to keep the valves open. Sucks that it didn't last the night though!
holy manim animation
Rube Goldberg would be thoroughly impressed! ✅
Hello, very cool video, I've wanted to build a machine like this for a long time, the dispensers are a cool idea. I can recommend the TMC2209 as a stepper motor driver, then the motors won't make such weird loud noises. Could you maybe publish the CAD files and a rough parts list. Thank you!
If you are really picky about motion accuracy, I recommend against the 2209. It only works properly if you turn off the fancy mode. When it automatically mode-switches (all the time without telling you) there is a motion error.
very cool idea!
Ngl, would buy a refined version of this
thinking about other ways than peristaltic to do a pump setup, what about putting each fluid in a large syringe? they're naturally designed to be food-safe, looks like you can get .5L ones pretty easily, larger with some searching perhaps. each one then just needs a tube to the cup location, and the flow is controlled precisely by moving the plunger (perhaps with a mechanically multiplexed actuator, since you might want a *lot* of syringes, though individual actuators could massively speed up dispensing)
You should be able to use food safe tubing and a peristaltic pump. I don’t think they cost that much for cheap ones
Very Cool and very overengineered
My imeadiate thought to the trilema would be why not just use an automated valve and flexible food grade tubing? Sourcing might be a pain but surely not more than making a Cartesian gantry system, not to mention lowering the points of failure.
Nice.... How do you do the animations and transitions? THe valve animation was amazing.
It's a manim animation. Same tool that 3brown1blue uses
You really should reach out to Current Concept for a collab :) Excellent video btw :)
Now that's an underrated channel
I wonder: couldnt you have used the dispensing cap thingys connected to some tubing and just pipe everything into one spot? And then just have servos actuate the caps...
Nice channel, always fun to see engineers with a sense of humour :D
Reminds me of one guy making an "oils searching" robot for someones housewarming party. They had put an expensive natural oak floor in their house.
And the robot was designed to randomly drive around and stop every few meters, drill a hole, and stick a flag in it - "There is no oil here!"
I Love it!! But what about peristaltic pumps ?
Thanks for watching! The big thing I found when looking at peristaltic pumps was flow rate. I was looking to dispense 250ml of fluid in somewhere around 5-10 seconds. I didn't find many 1500-3000 ml/min pumps that looked right for me. Parastaltic pumps do have the upside of consistent flow rate through so maybe if I found the right pump?
@@BuiltDifferentDesigns you could try to build your own + you could make a Video about it 😆
Pretty cool Idea. I was wondering about your cost. Since the price of the alc. dispenser + the electronic and the servo are not that cheap. Especially if a foodsafe 500ml/min pump cost around 35€.
And if your were concerned with the price of the build, why didn't you, or did you, try to use a servo for multiple dispenser?. I mean from a design point, I really like your dispenser design especially the locking mechanism and the contact plate.
A cocktail machine is definitley also on my todolist.
All you needed was a higher quality motor controller such a shame it broke
I know! Thanks for watching
Quick question:
Why not just pipe the dispensers up to one central cup-filling point?
This is so cool!
why not just put the bottles on a piece of hose and have vertical mounts for the bottles, then you can just take the bottle down flip it and take the hose off and swap bottles you could even add a ball valve
How is any step of this easier than a bunch of peristaltic pumps?
Now lets hear what your wife has to say about this 😅😅
Did you use dosing pumps? I just started the video, but dosing pumps are what you might need.
Edit:
You definitely should have gone with dosing pumps, you can even make them with stepper motors and 3d printed parts only requiring medical grade IV hoses and some bearings
The big thing that I found when researching peristaltic pumps is that the flow rates were somewhat low. I needed to dispense 250 ml of fluid in a few seconds. The upside, though, is the consistency of the flow rate.
Hope that sheds some light on my thought process. Thanks for watching!
6:05 Not enough gravity for the liquid, caused by partial vacuum in the bottle. I see no way for air to get back in the bottle after drooling out the liquid.
Peristaltic pumps would have been so much easier, but a lot less entertaining. Cheers!
wait all that just for it to die?
Lol, yep. I did a lot of testing, too, but evidently not the right kind of testing
🔥🔥🔥🔥🔥🔥
Hey, genius. You don't need to move the cup with servos and you don't need pumps. Just dispense the liquids and let a large funnel bring it to the cup. Think smarter, not harder.
You would then get mixings of ingredients which wouldn't be good for kids getting non alcoholic drinks or potential allergy issues. Also that's nowhere near as cool or has as much showmanship as this design.
@@braedenhunt3677 Easy problem to solve. Since the machine is so much simpler, you can build a second one for non-alcoholic beverages and still come out ahead. And as for people with allergies, add a epinephrine option or simply tell them to drink bottled water.
@@braedenhunt3677 You could also have a rinse basin so after a drink is dispensed the funnel is flushed out with clean water. That's still less complex than moving the cups. On the other hand, I think it looks way cooler to have the cup go for a little ride. The rube goldberg aspect of it is what makes it interesting.
The goal was showing off
@@braedenhunt3677 And those are downsides because........?
3:20 *Original design: ETCH-A-SKETCH*
10:35 --> Thats how all Atms , and Train Card Chargers work in here japan for the most part
3:45 If done properly, current sensing will locate the limits easily, ie, Prusa printers.