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

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

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)

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

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

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

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

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

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

Do you have the schematics and the parts list available?

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 .

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

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

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

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

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?

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

what program did you use for the animation demonstration?

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

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

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?

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?

What software are you using for the 3D modelling?

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

3 жыл бұрын

Where to buy

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.

How did you bind wooden discs and motor shaft ?

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

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

how did you mount the motors to the frame

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

what material are the wheels made out of?

What type of motors did u use?

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

5 жыл бұрын

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

what motor you use in this project

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

Can you tell me what brand wheels those are?

Hi is the mounting plate self made?

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.

is the motors both called the 63ZYT01B ?

which other motor can I use

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

How many RPM and which DC motor you have used?

What was the width of the wheels?

what motors did you use?

Which battery did you use

Can you have specification of motors?

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

Magnificent! What engine is used?

Great work mate, what motor is it though?

Can I know what motor you used for this project?

Where can i find similar spinning wheels?

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

@karanchandel3238

3 жыл бұрын

Speed controller connected to the motor.

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

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

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

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

Wondering if washing machine motor with gears will work?

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 👍🤝✌️

hi, can you tell me motor's rpm?

good way to lose fingers

@musiclover3470

4 жыл бұрын

Yes. To feed with hand is extremely dangerous.

@Baldovixxx

4 жыл бұрын

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

@saideepakgandi5364

3 жыл бұрын

Yes bro

@frankg846

3 жыл бұрын

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

Can u tell how to make the tennis ball launcher?

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

@0bo0

Жыл бұрын

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

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

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

6 жыл бұрын

+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: kzread.info/dash/bejne/gJegrtmBZ8jfntY.html

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

Are your selling?

GRACIAS champion felicidades EXCELENTE

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

@tannerlarson3289

6 жыл бұрын

+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: kzread.info/dash/bejne/gJegrtmBZ8jfntY.html

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

@garrettvalley3550

7 жыл бұрын

They are CIM motors

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

@rohitrawat9538

6 жыл бұрын

1000

Nice creation

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

What motor?

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

6 жыл бұрын

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

@tannerlarson3289

6 жыл бұрын

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: kzread.info/dash/bejne/gJegrtmBZ8jfntY.html

@LuxyRayTV

4 жыл бұрын

@@Hyratel I knew those were frc motors !

very well done!

Mes gustaria saber características de los motores dc,gracias

Hello BO. First of all, congratulations for your project. It's really cool and well made. So, I'm building a machine too. I don't have the same skills in eletronic and mechanic as you, but, i'm trying really hard with some help of a friend. Maybe we can share some knowledge? I have some questions for you: 1) I'm thinking of using EVA wheels (ethylene-vynil acetate). Its very light and very strong. Maybe it makes the autonomy of batteries longer, cause the motor uses much less force... I'm trinking in MDF only as the axis for the wheels. What you think? This really can influence the autonomy of batteries? 2) How you imagine the mechanism to feed the machine with the balls? I'm thinking in a microwave motor (low RPM) vertically disposed in a PVC pipe. It slowly rotates and liberates the ball. What you think? (sorry for bad english... i'm from Brazil). Thanks man!

@0bo0

9 жыл бұрын

Hi vexguine, 1) I don't have experience with EVA, but if the wheels have required shape or can be modified then why not to try. I also wanted to use wheels but couldn't find any that would be good for this (wrong size, expensive, heavy, unavailable at my location etc). 2) kzread.info/dash/bejne/d4iHp9d-YKawnJs.html check this video for inspiration. I think that good feed mechanism is the most difficult part of the machine.

@vexguine

9 жыл бұрын

0bo0 Thanks for the answer. Very inspiring video too. Lobster machines are great but in my country it is very expensive. I could say that the prices of a "chinese" machine is barely a robbery. American machines can cost $ 4.000! That situation gave me the idea to project a machine for personal use. Now my friend is thinking in commercial purposes for the local market. I dont know.. So, I tried with EVA and the result is very good! Very solid and strong wheel. Thats it. As soon as I have a good machine to show I will post a video. Bye

@vexguine

9 жыл бұрын

0bo0 So, please, one more info: It is difficult to find a good torque/rpm ratio... wWhat we look in the motors here? A 300 rpm/2 kg.cm motor can handle the work? Thanks a lot. Its the high RPM absolutely needed?

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

@balapadmanabhan1085

5 жыл бұрын

check out my Tennis Guru machine kzread.info/dash/bejne/faF52qazlsvVk5s.html

Qual a rotação deste motor?

what motors did you use ? Thanks

@vanshjeetsingh9002

3 жыл бұрын

775 motor

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

Wow....part three may be on a gore site when his hand gets caught in the machine.

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

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

@0bo0

7 жыл бұрын

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

@errordynamicist

7 жыл бұрын

What kind of material did you use for the wheels?

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

@0bo0

10 жыл бұрын

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

10 жыл бұрын

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

10 жыл бұрын

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

10 жыл бұрын

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

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

Where did you buy the motors and batteries

@balapadmanabhan1085

5 жыл бұрын

Check this link out. This solves a lot of problems with the machine. kzread.info/dash/bejne/faF52qazlsvVk5s.html

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

@0bo0

10 жыл бұрын

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

3 жыл бұрын

@@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

3 жыл бұрын

@@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).

Wheel name is what

hola BO, pero si utilizas motores de 100-200 w tendras que utilizar luego una conversor para poder llevar una bateria de 12 V, y hacer el producto transportable...

@0bo0

10 жыл бұрын

Hello. Not sure if I understood your post correctly. I meant 100-200 watts not volts, so there's no need for any converter. Just a PWM controller for each motor. And position sensors/encoders - to maintain set speed even when battery voltage drops. I think about including 230v->12v power supply as an optional module though.

Where did you buy the motor? Thanks

@0bo0

6 ай бұрын

Google for: CIM Motor FIRST

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

@0bo0

2 жыл бұрын

Hi. Sure, search for "cim motor".

@extragame7438

2 жыл бұрын

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

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

@0bo0

10 жыл бұрын

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.

the name of the stamp printed on the black engine ?

@0bo0

6 жыл бұрын

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

Great Project. Can you please give the details of the motor you used in your project and where did you buy these motors from? Thank you very much.

@0bo0

10 жыл бұрын

Thank you. FIRST CIM 12V 5280 RPM - this is the motor I have.

@Nallebjorn1

9 жыл бұрын

0bo0 How many amps are your batteries rated at? I am building a tennis ball machine to a workmate daughter a promising tennis player. thanks for the great video.

@0bo0

9 жыл бұрын

I currently use two standard UPS 12v 7Ah batteries in parallel and they are weak comparing to lipos. It takes quite a long time to spin the wheels up to 3k rpm with this setup, I think the motors would easily draw ~60-100Amps (total) if battery could provide it. Blue batteries used on this movie are 2x 2200mAh 20 or 25C lipo, that means about 40-50Amps max discharge current each.

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!

Que motores son?

thnx very much but can I use lipo. battery

@tannerlarson3289

6 жыл бұрын

+anshu bansal I used lipos for mine with no trouble. If you want to see it, here's the link: kzread.info/dash/bejne/gJegrtmBZ8jfntY.html

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

@0bo0

9 жыл бұрын

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

9 жыл бұрын

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

so glad that guy told him to get the angle of the other side of the net