Tennis ball machine DIY - part 1

To watch Part 2 (multiple features added) go here: • Tennis ball machine DI...
Proof of concept prototype of my tennis ball machine. Works pretty well, but wheels have to be better balanced, there's too much vibration currently. Expect more videos - this is a build log!
Music:
"Slow Burn" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons.org/licenses/b...

[@Dansan1343]

Hello, could anyone tell me what sized wheels he used in this build? What batterys were used to power it? Thanks.

[@toninoquaglietta100]

Hello. congratulations for the great work you have done. I'm making my tennis ball machine, and I wanted to ask you if you're kind enough to give me some little advice. what distance is there between the wheels? what engines did you use? thank you very much and congratulations

[@BikeventureMx]

hi!, what kind of dc motors did you used? there are equal? could you specify the rpm, operating voltage and kind of source?(it looks like DC)

[@cesargutierrez2120]

what type of wheels are you using and how did you get them? Also how did you connect the wheel to the motor ?

[@renanxavier4489]

Hi, Buddy First of all. congrats your project is really nice. I've trying a similar one. Cheap and fit also but my prototype I put a DC motor not a brushed one. So I would like to no how many RPM you set for a topspin backcourt? Thanks

[@achillelarregle7559]

hello, i am on a similar project and working on the sizing of a tennis ball launcher could you inform me on which motor you are using for this project or how to design the pucks please?

[@satyaprasad369]

How did you connect your motor shaft to the motor? Can you please provide part no for the shaft adapter? Thank you.

[@phoenixmaker5394]

Hey, Can you tell me which software you used to design the machine?

[@msallamali3572]

hello, could u tell me what material did u use for ur project.

[@sponge8697]

Hey could u tell me the rated current of this motor(first cim 5280)?So I could estimate the time it lasts.

[@williamloshouarn4928]

hello, can you tell me where did you buy your wheels please? Nice work! Thank you

[@antoniocouto]

hello friend! Waiting for part 3! Could you please inform the specs for the motor used on the ball feeder carrousel ? Tks!,!

[@francescomariani7285]

by the way, I would like to buy the engines you used to create the tennis paddle. Thank you

[@bmhcooray]

Do you have the schematics and the parts list available?

[@nithjayaprakash1966]

what is the rpm of the wheels, how big is the wheel like the diameter and the thickness, what type of batteries are you using and can you please give more info? please answer my questions this will help a lot thanks

[@jssondhi]

Hi BO, Could you please provide exact motor name and specification so that we can search for it? or if you can provide link that would be awesome.

[@danielguimaraesscatigno4236]

Hi friend, can I ask something a lit bit technical? The DC Motor used is a high tork, I belive it´s 2.42N.M . My question is, what´s preferable here, Tork or High RPM?

[@giuliopolicicchio7695]

Hi!!! Great project and I’m to follow yours between others I had watched on tube. can I ask you if you have decided to share the project? I’m in trouble with the structure and the motor shaft. can you help me?

[@coolestdadever]

0bo0 this is awesome! Do you have a list of the components you have used? (Motors, arduino? and more)

[@cyberjass]

What materials did you use to connect the motor to the wheels??

[@chloefry50]

Hi, are you able to tell me the sizes of this? I am having to build one similar

[@joseluisortegacalero8488]

Hi, nice prototipe, i'm spanish, can you give to me the cad file and the type or reference and specs of the motors and wheels?? I'm interested in that. Thanks.

[@LaxingGamer72]

One more question: What kind of wheels are used for this?

[@user-lm9de9yn9p]

Can I know what motor you used for this project?

[@metronom_81]

How did you bind wooden discs and motor shaft ?

[@wcarper1]

what program did you use for the animation demonstration?

[@heejinkim3073]

Thank you for your great work. I have an inquiry about the motor shaft. Did you replaced a motor shaft to a longer one or used a coupling to extend it? Furthermore, how did you fasten the wheel and the shaft? Thank you for reading it. Waiting for your reply.

[@0bo0]

Heejin Kim thank you. I used this custom adapter imgur.com/POTDarx

[@HrHTeam]

What software are you using for the 3D modelling?

[@TiahraThankyew]

how did you mount the motors to the frame

[@ahujo2556]

Hello, impressive work! How do you control the speed or the rpm of each wheel? Need help ASAP :S Thanks!

[@karanchandel3238]

Speed controller connected to the motor.

[@user-xp3of8ns2x]

good evening, at how many rpm should the engine run at maximum?

[@megrobelly]

Did you share the inventor files at any point? please let me know. thanks

[@EyesOfTheInternet]

Can you tell me what brand wheels those are?

[@himanshugandhi6201]

bro I don't have this type of motor can I use do motor plz tell me what voltage of dc motor

[@sanjaysanjay-em9tl]

sir how much rpm did you use and what is the wheel diameter?

[@Tlcunha81]

what material are the wheels made out of?

[@hanifiakkyn205]

NİCE. Is there a site where you can get the engine you are using?

[@michahajduga18]

Fajna maszynka. Potrzebuje silnik do takiej maszyny. Czy możesz podać dane silnika?

[@mattbowater2865]

What type of motors did u use?

[@nzmkhi]

what motor you use in this project

[@rakeshtripathi4049]

which kind of motor do you use give the price of it

[@simplesmortaleza7x]

Hello, I wanted to know what kind of motors do you use in your machine(the specifications) and also the material of your weels

[@Hyratel]

12v 2.5" body CIM motors, available from andymark.com

[@tannerlarson3289]

When I was making mine I couldn't find the material he used for his wheels so I ended up getting some bench grinder wheels that were rated for use up to 9000 rpm. Worked pretty well! If you want to see it, here's the link: kzbin.info/www/bejne/hJTPfap-bMqspNU

[@LuxyRayTV]

@@Hyratel I knew those were frc motors !

[@questdad]

How many RPM and which DC motor you have used?

[@billthestinker]

very well done!

[@Swenser]

Wondering if washing machine motor with gears will work?

[@gevahalperin]

What kind of motors are you using? Is it possible to get their catalog number?

[@garrettvalley3550]

They are CIM motors

[@bugihere7281]

Where can i find similar spinning wheels?

[@NINOABSNABSN]

Motor specifications: Speed: 10.000 rpm Torq 0.4~4kgf.cm a 5 HP 0,13 Voltage 12V Power 97W Current 8 Amps CIM motors

[@daddyjee6137]

Where to buy

[@anshubansal1452]

I search on net about the batteries that you mentioned but they are very big in size as compared to tou

[@joshuawilliam4679]

is the motors both called the 63ZYT01B ?

[@danielanderle9095]

what motors did you use?

[@Hanok-mo5os]

which other motor can I use

[@davidespigolon8170]

Can you have specification of motors?

[@vedantsharma9101]

Bro can you tell what material you choose for the rotating friction wheels ?

[@balapadmanabhan1085]

check out my Tennis Guru machine kzbin.info/www/bejne/gZ6oqXewm82imZo

[@absncomercial]

Dear, please...what is motor Electric specifications?

[@hemavenkateswaran9760]

Hi is the mounting plate self made?

[@Swenser]

Deciding on ball feed mechanism. Thinking feeding balls down a twirly tube and a simple latch actuator to let one ball fall to the wheels every 2 sec. Rather than a tub with rotating discs .

[@josetuzzio452]

buen dia queria saber si hicieron el video 3 para ver como coloca la torre de pelotitas

[@esaskhan95]

Loved this! How much space have you left between the two wheels?

[@tannerlarson3289]

+Esas Khan I did one pretty similar to this and I left 34mm (half the diameter of the tennis ball). If you want to see it, here's the link: kzbin.info/www/bejne/hJTPfap-bMqspNU

[@messioncold3627]

Which battery did you use

[@larslefebvre5966]

What was the width of the wheels?

[@ronaldinotanmay6]

Can u tell how to make the tennis ball launcher?

[@thethinker5637]

Magnificent! What engine is used?

[@chris_son_]

What is the name and the price of the motors? Where did you buy them from?

[@rohitrawat9538]

1000

[@shaunakkalra202]

Great work mate, what motor is it though?

[@arjuns1128]

Hello, Fantastic work getting the machine rolling. I have started building one for the school. I have a 12v 6000 rpm , shaft length 15mm, shaft width 6mm. would this motor be sufficient?

[@tannerlarson3289]

+Arjun S I built one pretty similar with 12v 6500 rpm motors and it works great, so I'd imagine yours would too. If you want to see mine, here's the link: kzbin.info/www/bejne/hJTPfap-bMqspNU

[@shailsh3965]

Fantastic creation....Can you please advice what is distance between wheels in mm and what are specification for Motor ?...Thank you very much

[@0bo0]

Thank you. 38 mm on the outside and about 42 in the middle, but I'd recommend making the distance adjustable. Search for "First CIM motor" to find the spec

[@oscarcoach6422]

GRACIAS champion felicidades EXCELENTE

[@manojkumar-xs7nt]

Motor specifications bro like cost speed hp etc??? Plzz

[@c-techhusadases-dor6062]

hi, can you tell me motor's rpm?

[@satyamjhas_j8663]

Nice creation

[@spyracks3329]

what motors did you use ? Thanks

[@vanshjeetsingh9002]

775 motor

[@javierberrocal6463]

Mes gustaria saber características de los motores dc,gracias

[@jesuskcosta]

Great project. I'm training myself. Would you kindly share the project then I can make one for me? Thank you

[@mitchhplz7564]

Hi could you please tell me what motors you use for this? It would really help for my uni project. Thanks

[@0bo0]

Hi. Sure, search for "cim motor".

[@extragame7438]

@@0bo0 can you plz make a new and detailed video of this project

[@anshumannayak7880]

sir can you give the RPM details used in each wheel..

[@mickevenvillajos215]

Hello sir , Good evening. Is it okay to ask regarding on how you create the wooden wheels ?

[@0bo0]

Hello. It's not wood. They're made of two thick square sheets of MDF each, joined together with PVA glue to futher increase the thickness. This can be processed on a lathe to make a nice round lightened wheel. Them you need to balance it to reduce vibrations - just spin it up and try to add small weight on the rim in various places until it doesnt vibrate too much

[@saadamiens]

Hello, were you able to compute the speed of the ball in the CAD software ?

[@0bo0]

Hi, max speed can be easily calculated from rpm and wheel diameter, but actual speed is much lower due to low friction between wheels and ball, ball squeeze, etc. Maybe someone who uses such software regularly would be able to simulate this, but I wasn't.

[@Giuliano1969]

@@0bo0 Hi, first of all congrats for your amazing project and thank you very much for sharing your 2 videos. Technically delightful : closed loop speed control, bluetooth bidir communication, slope control,... I’m working on a similar DIY project, and would like to share with you some considerations on the *ball speed* leaving the ball machine, compared with *engine RPM*, In video n° 1 (1:20) , ball is flying from the baseline to first quarter of the field (approx 18m), taking off with a slope of about 15°. Considering usual kinematic laws, the ball speed should be something 18 ~ 19 m/s. IF( !) the ball and the wheels WOULD have perfect friction, they would have the same linear speed at shooting time…. with a diameter of 190mm, this lead us “just” to ~1900 rpm…. BUT you are using an engine of 5300 rpm ( much more than 1900 rpm!) My *questions* are: -WHAT is the “normal” rpm speed are you using for the “flat shot” from the baseline ? -Have you considered a different wheel material to increase friction ? BR

[@0bo0]

@@Giuliano1969 Hi Giuliano, thanks for the comment. I haven't used the machine since long time ago and cant answer your question about rpms (3-4k?). Definitely had to be much higher than what I was getting from a simple calculation. My plan was to put an continuous closed band cut out of an inner tube from an old car wheel onto machine wheels to increase friction. Having a closed rubber loop would make it more safe in comparison to a strip glued onto the surface. Another improvent that can be done with the stuff easily available today would be replacing attitude control dc motor with a stepper, use a screw with a trapezoid thread, and absolute rotation sensor (hall effect) instead of a potentiometer (or just add an endstop and perform homing procedure each time the machine is switched on, then count steps).

[@tpiranaalan628]

can i know the voltage and model of the motor and size of the wheels

[@0bo0]

Motor: FIRST CIM (?) 12V 5280RPM, diameter of the wheels ~190mm

[@errordynamicist]

What kind of material did you use for the wheels?

[@marcogatto2474]

good way to lose fingers

[@musiclover3470]

Yes. To feed with hand is extremely dangerous.

[@Baldovixxx]

I attached a tube to the mills so i don't feed it directly with my hands

[@saideepakgandi5364]

Yes bro

[@frankg846]

ahahah can't stop laughing... you gotta be a commedian

[@chikaymaravilla9245]

Where did you buy the motor? Thanks

[@0bo0]

Google for: CIM Motor FIRST

[@vpbalajiin]

Where did you buy the motors and batteries

[@balapadmanabhan1085]

Check this link out. This solves a lot of problems with the machine. kzbin.info/www/bejne/gZ6oqXewm82imZo

[@newtech994]

What motor?

[@btipler8]

Are your selling?

[@oiaingranto]

Hi, I am an engineering student and if there is any way I could contact you about your design please let me know

[@anandkumarshukla2403]

OboO can you plz tell wich type of motor you have used in this

[@0bo0]

Sure, search for "FIRST CIM motor"

[@lk533]

Hi, great job first of all... Could you please tell me how much is the diameter of the wheels and the axle spacing?

[@0bo0]

Hi, thx. Diameter is 195mm. I can't measure spacing right now, but it's between 35-45mm. Ball has to be squeezed to achieve high velocity.

[@lk533]

0bo0 Thank you, that's what I thought too... So the ejection speed of the ball is given both by the wheels rotation speed and by the squeeze energy right? What's approximatively the range of rotation speed for the wheels? I'm doing a research on tennis machines for my University :)

[@0bo0]

lk533 I think that the greatest benefit from squeeze is increased friction and contact time between ball and wheels. If a ball doesn't slide during the contact, the speed it gets more closely matches linear velocity of the surface of the wheel. Maximum rotation speed this machine can achieve is over 5k rpms (depends on battery voltage). Such speed require perfectly balanced wheels. Mine are usable up to 3-3.5k currently.

[@lk533]

0bo0 ok thank you very much! I'll be maybe back for further informations if you don't mind :)

[@millerpimenta5893]

Qual a rotação deste motor?

[@TennisTheo]

Hi Bo, How did you connect your motors to the wheels? Did you make custom parts?

[@fuadel-khoury851]

I Rally wanna know that

[@domenicodalmonte5904]

complimenti ottima idea ....ma non riesco a trovare i motori ...

[@LoriGproduction]

the name of the stamp printed on the black engine ?

[@0bo0]

It's this motor: Banebots FIRST CIM 12V 5280 RPM

[@viniciusroman9953]

hi, are you still working on this project? What is the diameter of the wheels? Are they made of wood?

[@0bo0]

Hi, I have a progress but not enough to upload a new video (there's part two, don't know if you saw it). Diameter is ~195mm. They're made of MDF (medium density fibreboard).

[@mediafiles4725]

0bo0 Do you know to say what is the optimal distance between the wheel? Is it the Ball diameter or Less?

[@rafaelcintron5140]

Wheel barrel tires are good, and small trailer tires also, I would recommend a feeding tube so hands don't get so close to them spinning tires, could be a ugly accident if your hand was to get sucked in 👍🤝✌️

[@anshubansal1452]

thnx very much but can I use lipo. battery

[@tannerlarson3289]

+anshu bansal I used lipos for mine with no trouble. If you want to see it, here's the link: kzbin.info/www/bejne/hJTPfap-bMqspNU

[@kiley5754]

Hi 0bo0,I'm working on an automation project for a machining class I'm taking. I was planning on making a tennis ball launcher for dogs, and came across this video. This is an awesome/ reasonably simple design concept! I didn't know what the possibility of me getting some dimensions from you was? I have to use AC motors and have to have three pneumatic moves. So there will be design differences I will figure out, but I have no clue where to start :). I'd appreciate any help! Thank you!

[@dvignesh1665]

Wheel name is what

[@rossattardo4342]

How long will your batteries last before they run out and need to be charged? Thanks

[@0bo0]

Depends on many factors, in my case with fresh batteries it should theoretically work for almost an hour. Currently I use old batteries from UPS (see 2nd video) which have only one third of original capacity and that gives 15-20 minutes.

[@manojkumar-xs7nt]

What motor do you used bro plz tell me

[@MuhammadNaeem-mk3xm]

I am trying to create this project myself on which I have done a little research. 12 VOLT DC CIM MOTOR. 5280 rpm.( available on Andy mark / VEX Robotic ) store. price 33$ +-

[@DanielaGamez-lf4mc]

Que motores son?

[@Tenta-X]

how much did you leave between the two wheels? the exact diameter of the tennis ball or less?

[@0bo0]

It can be adjusted in my machine. It has to be much less than diameter of a ball, something like 3.5-4cm.

[@Tenta-X]

0bo0 what is the name of the piece that extend the motor shaft length did you buy it or is it custom made?

[@0bo0]

Custom made. I posted a render somewhere in comments under this or the next part of the movie.