The Engineering of Droplets and their Formation in a Commercial Inkjet Printer

Bill describes how the minimization of surface area and inertia compete to form droplets. He then shows how engineers use this knowledge to create precisely-sized droplets in a commercial inkjet printer -- the type used to print expiration dates on food packages.

[@Lightacre.]

When the world needed him most, he vanished

[@cedrichua3476]

I hope it won’t be 100 years until he returns...

[@dnsgfs]

This is so sad

[@nousername8162]

He’s writing a book and children

[@cedrichua3476]

@@nousername8162 yuppers... hope he comes back soon

[@phil_cassidy]

@@nousername8162 He can write children? Now that's some advanced engineering.

[@shashankvemuri1219]

Always a clear cut explanation. You are the real engineering guy

[@curtleyambrose100]

straight to the point. no bullshit. only relevant pre information.

[@nousername8162]

For those wondering: he’s writing a book and that’s why no content

[@engineerguyvideo]

... and two small children ... one of whom did not let me sleep more than 4 hours until Jan 2 2020 ... plus a pandemic.

[@MichaelBennett1]

engineerguy Take care and enjoy the break from KZbin, your videos are welcome any time you decide to return.

[@dcmurphy5157]

Oh, he is human. My bad, I thought he was a robot given his immense knowledge and understanding of world.

[@samuelmaucaille702]

​@@engineerguyvideo you make such amazing content. Greetings from Peru

[@engineerguyvideo]

Thank you!

[@EeveeEuphoria]

Just an FYI, Bill updated his website just today actually! In a nutshell, he's been writing a book which will be the basis for a new series of videos, but unfortunately family life and of course the current pandemic has prevented him from actually getting to work on these videos.

[@jessesanchez9998]

I miss him 😢😢

[@nuclearmex630]

Nice.

[@KingLich451]

good to hear he is doing ok

[@RainOrigami]

thanks dude

[@litigioussociety4249]

I'm always amazed how something that looks so simple is not only much more complex, but can require many decades if not centuries of research to achieve.

[@ScienceDiscoverer]

In fact if you look around yourself in a house youll notice that absolutely EVERYTHING that surrounds you is unbelievably complex and each little or big thing requires its own science and almost all life worth to create it... This is mind bogging...

[@Guru_1092]

Answers to questions I didn't know I wanted answered. Amazing as always!

[@nk361]

Take your time, we're all just glad you're okay and still spreading good info in any way. Hope your kids end up loving engineering as much as you and us

[@DobbieDize]

How do u know

[@karazanic]

Hello Bill - It's been 3 years since your last video, and i know you're writing a book right now, but i just wanted to say - thank you for all the videos you've made, they infected me with the love of technology, love of learning new things, and love of engineering - thanks to which, i was able to fix a lot of things in my home myself with the knowledge you and others like you shared with me, and was able to create things myself too - from simple toys for my pet rats, to building a radio all by myself. I don't live in a good country, but i will definitely try to save up for your book when it comes out. And i will keep trying to go to some kind of school to become an engineer, or even just a "simple" plumber, anyone who is able to create something as part of their job, and is challenged by new situations and problems. Your content inspired me, and i'm sure it inspired hundreds more. From the bottom of my heart, thank you for everything you do.

[@January6thugs]

RIP i heard you died!

[@RealEngineering]

The don is back.

[@MrUbiquitous]

he is backkkkkkkk!!!!!

[@swagzilla3000]

You guys should collab. The 2 best voices in the engineering videos game

[@abcqer555]

You two rock

[@JohnDobak]

Get back to work you. Also you're right.

[@apollogeist8513]

The don is gone :(

[@tomo8433]

Thank god you are back. Always amazed at how you are able to breakdown and explain complex ideas to the point its easy to understand

[@HoldandModify]

People didn't know how to read and we got the Catholic church. KNOWLEDGE IS POWER. Explain to us Engineer Guy! Glad you're back!

[@kuhmpashun]

The Feynman technique in real time.

[@thehobknocher]

Another quality video.

[@JaredOwen]

Great video as usual - thanks Bill

[@HopeScreen]

Ur animations is what I wish to make like them.

[@haribganesh8519]

Your explaining things in simple way

[@literallyamonkey881]

He looks just like mark hamill

[@January6thugs]

RIP i heard you died!

[@terrymcnaughton1430]

Nope,he isn't dead.​@@January6thugs

[@UselessDuckCompany]

I almost jumped out of my chair when I saw a new video was posted.

[@arwahsapi]

Hi Mike, the CEO of the Useless Duck Company.

[@lordvenom4419]

@@arwahsapi tomorrow I have auditing exam I am watching this. why

[@JayRexus1337]

I remember doing that... 2 years ago

[@criii4950]

@@JayRexus1337 here we are.. in the after

[@JayRexus1337]

@@criii4950 unfortunately, how painful it is to be here, in the after, when the excitement of newness has worn off, and we are left with a sense of wonder at what we have witnessed

[@alexnedved6830]

This channel is the one I will always stay subscribed to no matter how long between uploads. I love it this much.

[@makatron]

Always worth the wait

[@ArmyPig007]

Good to see you back Bill! Great video!

[@seanheelan6740]

Wish he would comeback!!

[@engineerguyvideo]

I will

[@seanheelan6740]

Yes!… (insert fist pump)

[@SeraphOfTheNine]

@@engineerguyvideo great to hear! Hope you and yours are well

[@a68riz]

Miss the Engineering Guy. Appreciate all you shared and taught us.

[@cinobro6393]

Woah, didn't expect to see a new video from Engineerguy

[@2DLove]

Everyone loves the way you break these concepts down for your videos. You're truly a fantastic teacher.

[@timfondiggle2582]

How are you sure *EVERYONE* loves it? I'm sure *MOST* people do, but not everyone. I'm sure there's even some dickhead out there who absolutely hates it. You shouldn't lie on the Internet man, Jesus can see everything you say, and he'll send you straight to Hell for lieing. Be sure to confess to your local priest, you never know when you'll kick it for good, and I'm sure you'd rather be in heaven than the firey depths of Hell.

[@patrickw.4422]

Tim fondiggle no need these bs plz.

[@connor7063]

@@timfondiggle2582 bruh

[@Moses_VII]

Best engineering channel that puts Real Engineering to shame.

[@lovemovement8808]

this gentleman may be the best communicator on all of youtube

[@jkkarkar]

Always a pleasure to watch your video's, Bill. Thank you!

[@huemungus69]

You are a great teacher, hope to see more soon!!

[@Jacksirrom]

Engineer guy please come back! We need you now more than ever! Our man is sitting on a young person's dream job but he's still writing books!

[@Desugan69]

he is working on new video/s

[@rubendavila6248]

I'm sorry I am late to the show, but please make a return. There are thousands more just now discovering you!

[@5678sothourn]

Seems he’s writing a book ans has 2 kids now

[@AndersEngerJensen]

Sweet! Been a long time since last video? Saving this for after work. :)

[@JJRicks]

Anders, fun to see you here! :)

[@L00PdeL00P]

Aw hey dude

[@Deluxeta]

How's it going, retro guy?

[@epsilonsigmamu]

Hey! I work for a CIJ company! Cool to see someone talking about the stuff I see all the time!

[@I_am_a_cat_]

2 years without my favorite educator... what's the point in even going on without engineerguy :(

[@engineerguyvideo]

I will be back! Page proofs for new book arrived last week .. although pub date is March 23, 2023; getting studio back on order after nearly two years of HVAC renovation.

[@I_am_a_cat_]

@@engineerguyvideo you have no idea how excited that makes me. Your videos helped me beat opiate addiction, to be completely honest. Whenever I was struggling with cravings I'd put one of your videos on, it worked wonders. Over 3 years clean now... so this channel holds a special place in my heart.

[@Valiumtino71]

@@engineerguyvideo YES!!!

[@fckgooogle1000x]

@@engineerguyvideo Return of the king?

[@frankcastle1862]

@@engineerguyvideo ayyy :DD

[@hobojakobo]

One thing that makes these videos so captivating and informative, aside from the extremely interesting subject matter, is Bill’s ability to explain complex ideas in a simple way. Such an underrated skill and something that always excites younger generations. Love these videos.

[@yusokrazee]

He lives! Always a treat to see you in my feed. Welcome back, bro.

[@GRAHFMETAL]

I love this channel. He has a PERFECT way of explaining things. Great stuff!

[@Aguacommander]

Great to have you back! I'm currently developing a ink for printing through a consumer ink-jet printer. It was awesome to see you cover something that has been on my mind lately.

[@PRCORPSMAN13]

Come back Bill! Need some of that knowledge

[@OlOleander]

I've always wondered about this. Another thorough - and thoroughly entertaining - explanation. Thanks Bill, and welcome back!

[@foadrightnow5725]

I wish the video was longer! ALWAYS fascinating and informative videos! 2-thumbs up!

[@billpotter9716]

Hi Bill. Just checking in. I echo the thoughts of your other viewers in saying we miss your warm words of scientific wisdom. Hope your family including your new kid are doing well. I am totally ready for another video please. Much love from Oregon.

[@AnanyaGupta]

You are more than an engineer! Your ability to engage and explain without the flashing and whistles is so wonderful.

[@rahultnene]

Love your videos Bill! Clear, concise, and entertaining. Looking forward to the next one!

[@addivf2911]

Oh my goodness, a new video from the engineer guy? Is it true? This is truly a blessed day

[@l-dv2502]

This youtube channel is definitely one of the best accounts made on any platform on the internet

[@ktadamsII]

Glad to have you back. I was worried you stopped making these amazing videos! Thank you for your dedication to these engineering videos. I absolutely love them!

[@JasonArmond]

I'm not an engineer and never really thought about droplets before, but wow, I genuinely found this video fascinating. Thank you!

[@Doc-Holliday1851]

I always love seeing your videos in my subscription tab. 👍

[@prod805212]

'Diffusion' feels like the most important physical concept. You often do a fantastic job of explaining how diffusion at large affects different chemical/physical/biological concepts.

[@abex701]

Still here, subscribed, patiently waiting. Hello from Chile

[@engineerguyvideo]

Hello!

[@abex701]

Omg, best day ever. Gonna re-watch the aluminum can video to celebrate

[@TrabberShir]

Wow, this is a channel I don't think I have seen in my sub box for a long while. Am very happy to see this.

[@MysterX79]

I also worried that there might something have happened to you - not surprised so many people missed you - I'm very glad you are back.

[@vonhendrik]

Nah if I remember correctly he just had a kid. Little engineering guy jr.

[@MysterX79]

@@vonhendrik Best reason to take some time.

[@josephulbrich7523]

I love your videos. They are my favorite videos I've ever watched on KZbin, I wish there were more content creators like you on the channel who make learning engineering concepts so interesting. I wish you or a group of your engineering friends would collaborate to make more videos like these, the world needs more videos like these.

[@s.j7423]

your channels a real wonderful source of content in quarantine! we hope you've been keeping well !!

[@1OkiePackRat]

Wooo Hooo!!! Great to see you back Bill! Your videos are always interesting and informative, and fun to watch.

[@badaldebnath3771]

Great explanation Bill. Admire your work. Keep it up.

[@russtuff]

I'm glad I checked in on this channel, his site says: New Book & Companion Video Series Coming March 2023

[@engineerguyvideo]

Indeed … I was told there is an Amazon page for it now!

[@russtuff]

@@engineerguyvideo pre-ordered!

[@robertrobinson1278]

Well, it's a relief to see you back with the knowledge!

[@Acemans]

Awesome to see your videos again, hope youre having a great time

[@darrencorbett9883]

man i miss this guy

[@engineerguyvideo]

I miss you too … but I will be back

[@darrencorbett9883]

@@engineerguyvideo good to hear mate 👍🏻👍🏻🤣🤣

[@TweeterMan287]

@@engineerguyvideo Oh hey! I literally just came over to your latest video to see where you went. Glad to see you!

[@blaizeatri]

Glad you’re ok! I also recommend putting a community post 2 months before you’re ready, to let more People know!

[@engineerguyvideo]

Good idea

[@PradeepKalaimaran]

Thank you for coming back. Thank you!

[@ezragonzalez8936]

Bills voice alone merits a subscribe! fantastic illustration of something deceivingly simple yet so complex!

[@chriswatson2407]

Well done on the news of delivering your first draft. Onwards and upwards!

[@engineerguyvideo]

I was working on scripts from the manuscript today …

[@TheOzarkWizard]

Just found this channel, I hope you continue to upload.

[@engineerguyvideo]

Yes .. see update at engineerguy.com

[@TheOzarkWizard]

@@engineerguyvideo great to hear from you, keep up the great work

[@rdaltry777]

Came here to say how much we all miss you. Hey, if you're doing the family thing, that's great. Just know you are a treasure. Your explanations and fascination with seemingly mundane things brought great joy to many. Best wishes to you and yours, Bill.

[@engineerguyvideo]

Thank you.

[@alexhriz8745]

Bill, Thanks for producing quality content. Your effort is greatly appreciated.

[@Pikaroth]

We need you back now more than ever! If the channel is "dead," so to speak, I, and many others, hope you do a final "goodbye" video, at least! Miss you!

[@Sara__finance]

☝️☝️Nothing to talk much but if you are ready to work from the comfort of your home even from your working place with high weekly payment you send me a message saying I'm interested Please: I know not everyone will be interested ignore if aren't interested God bless you all

[@jessesanchez9998]

Miss this channel 😢😢😢

[@engineerguyvideo]

I will be back

[@jessesanchez9998]

@@engineerguyvideo 😁😁😁😁😁🙏🙏🙏🙏🙏🙏🙏

[@gabrielmeilikhov6211]

Such an incredible leap in quality in a channel that was already great. Remarkable.

[@shavono8402]

It is so wonderful to have another video from you. These explanations are so concise and descriptive that it makes it incredibly easy to understand the concept being described, and this is present in every single one of your videos. Absolutely fantastic work, as always!

[@enjoyyoursleep1]

Whats in store for 2023? Love your work on this channel 'engineerguy'

[@engineerguyvideo]

A series of four ~15 minute videos on the engineering method. The are a companion to my book The Things We Make that comes out on March 21, 2023 ISBN 978-1728215754.

[@ShanerTheGrey]

Please make more than one video every few years 😢

[@itsm3th3b33]

Thanks for coming back. We missed your highly instructive videos.

[@albertlert]

Great video, clear explanation. Just love the no fuff approach too!

[@Sogrim100]

I hope you are doing well during these times!

[@Nexus2Eden]

Always an immediate click! Always an excellent video - thanks for all your hard work. 😉👍

[@ahmadshawarr]

woah a youtube video that has a true title/thumbnail without a screaming intro?? you belong somewhere greater my man

[@calyodelphi124]

You are the undisputed king of engineering communication. This was an amazing peek into something so innocuous and complicated, and you explained it all so succinctly.

[@huemungus69]

Missed you guy!!

[@shoukathkhan3646]

Welcome back. I have been missing your videos for sometime

[@josephmcconnell7310]

Your videos are some of the best on the internet. Your use of this medium for teaching is something all others need to consider for their content.

[@chefzane8714]

Now being in engineering school my appreciation of his ability to explain and teach is incredible, what a great teacher!!

[@left4newbz]

Miss you, man. Hope you and your family are doing well

[@haskee5349]

@He Need Some Milk! very cursed

[@adamkendall997]

Man I was just going to say, Ink Jet Printers. The Videojet printers I work with use a crystal that vibrates at 60,000hz, thus making 60,000 drops per second. There's an LED light flashing at the same rate allowing one to actually see the drop formation using a loupe. After that, the charge tunnel and deflection plate work similarly to a CRT.

[@Phreakrider]

What a fantastic exposé of the matter. Never taught that much engineering went into those ink jet printer!

[@saleplains]

i went down a rabbit hole on droplet formation a couple months ago when i set out to build a fount that emulated sound of rain more realistically by creating falling droplets instead of streams i never before considered what an immensely complex process the formation of droplets is. for my application consistent sizing was not necessary and i instead relied on a fixed hole diameter and head height on the rainhead to achieve the desired results. thank you for this wonderful video

[@loganebeling9023]

Interesting as always, thank you!

[@kirklazarus1132]

Amazing to see you back (hopefully)! How are you, Bill?

[@engineerguyvideo]

I am well!

[@kirklazarus1132]

@@engineerguyvideo Glad to hear that!

[@peanutbutter2597]

What a truly amazing engineer guy I love listening to him explain things !!

[@shenghan9385]

Very well. There are always those who actually study all the phenomena in details before and after the need for such a knowledge is there. And thank God for creating those people who greatly convenient and enrich our lives.

[@patern6245]

This channel is really underrated and I've Heard your making a new series, I'm really looking forward to it. Do you have any secondary media like twitter (or even the yt community post thing) where you can keep us updated. Best of luck on your new project

[@blossomnosleep]

they have a website

[@dcu21]

Great episode! 6 month wait and its worth it!

[@Flashtone08]

I know that passion fills the cup and all these videos are a result of the overflow. Im eagerly waiting for engineer guys return but also know these video require a lot.

[@adrianfgaleano]

LOVE your videos Bill, all your explanations are fascinating, in a slow voice, so one have the time to process the info while listening.

[@desmo750f1]

I'm struggling with your statement @1:48, "The surface area to volume ratio of a sphere is double that of an optimized cylinder with the same radius". If you include the ends of the cylinder the surface area to volume ratio is the same as that of a sphere with the same radius, 3/r. If you don't include the ends the sa/vol is 2/3 that of the sphere of the same radius, 2/r. For the same volume the sphere has 0.87 times the sa/vol ratio of the cylinder with ends and 1.31 times the sa/vol ratio of the cylinder ignoring the ends. This cold explain why the flow is continuous until it starts to neck through vibration or imperfect flow.

[@fiveolddogs]

The Engineering Guy never ceases to astound. He pronounces "almond" as ALE-mund (3:53). Simply fascinating.

[@davidczuba7723]

Well done. Thank you, Bill. In 1995, I traveled to Dayton Ohio to train on Scitex inkjet technology, formerly Kodak Versamark.

[@shjxhdjdjxh]

Welcome l hope help me orphansneedWe putdifficulthe havechildrenWe needyesterdayno There isfor us housing livingtentmy seekersThe helphelpsickneed medicineuntilinsurancehealthyCut offAbout MeI hope helpI have Proof my wordspay when God,

[@cassiofonte8172]

That was too long of a wait ... and you made it worth again! Awesome! Thanks!

[@MrMysticphantom]

Another excellent video.. dropped on us

[@MohammedSalemDMC3]

I liked this video before i even see it Welcome back engineeringguy :)

[@jasondashney]

Trust, but verify. Watch before upvoting or you are no different than the people on Rotten Tomatoes who gave Black Panther 5 stars before even seeing the movie (they'd leave comments like "Can't wait to see this movie").

[@cequiestbon3676]

You’re so educational but at the same time have such good content for old videos

[@jithindas6084]

This is hands down the best explanation on the Internet!

[@gordybishop2375]

Miss you putting out new videos. Hope all is well.

[@profbollo338]

When are you coming back with some more videos we miss you, your presentation skills are top class sir.

[@shjxhdjdjxh]

Welcome l hope help me orphansneedWe putdifficulthe havechildrenWe needyesterdayno There isfor us housing livingtentmy seekersThe helphelpsickneed medicineuntilinsurancehealthyCut offAbout MeI hope helpI have Proof my wordspay when God.

[@evilkidm93b]

Very nice explanations, no distracting music, I enjoyed it!

[@Cut2CutReviews]

Just marvelous and the way bill explains is great