I am a dad new to the vex iq world and l just want to tell you that you truly are an inspiration for me an my kids. Thank you for your hard work and for sharing your work with the rest of us.
that's the bot that I'm currently building! Just need to finish up the launcher mechanics and I'm done! Anyways, love the video. The editing, the music, and the bot are amazing!
Thanks, but I'm not actually officially in VEX IQ anymore. I just build robots for fun and to have something to do with all the pieces :). I can't wait to see what you guys come up with this year!
theres a lot of tension from one side, how did u make it that the catapult stays down for the balls to come in. For example, we dont want it to continuously shooting, after shooting we want it to come down and stay there until we press something on the controller again. But the elastics have a lot of force which is stopping the catapult to go down fully. Do we need special code or some sort of sensor. If so whats the name of the sensor. Good luck this season
Me and my daughter saw a lot of similar Robots at her first competition she decided to make one herself! She’s currently trying to attach the bar for the claw gears, an6 tips for her?
If it rips itself apart or something like that, you might check out these topics on VEXforum: www.vexforum.com/t/how-to-get-enough-lift-into-the-catapult-system/96670 and www.vexforum.com/t/catapult/97105. Good luck, and I'm looking forward to hearing how it goes.
@@Joseph973 Thank you Joseph for the inspiration this is a big project for three ten year olds but they're working hard to use this video to guide/inspiration for their building with some mods of course.
I suppose that you could use Squared Away parts to build this robot, but you'd probably be missing some pieces. I'm not sure I understand you question. Can you try to rephrase it?
This robot was for last year's game. Why do you want a tutorial on it? In any case though, this robot is long taken apart, so I can't make a tutorial on it.
VERY COOL!! I am Mr. Bakhoum Senegalese I am a physical science teacher and a lead a robotic club in my school. We participate in many competitions first global 2018 and 2019 and the Pan-African Robotic competition since 2015. This year the challenge rules are similar to what we see in the video. So I would like to ask you if you can help to prepare for the competition by giving the design of the robot I mean all the steps we need to know to build it. our problem will be the catapult. thank you
Hello, this robot was actually for last year's challenge. The new challenge is Slapshot, and will need a different robot. Also, I cannot share the building instructions because they just don't exist. We built this robot in real life, and consequently there are no instructions. In fact, this particular robot is no longer together, as we needed the pieces for other robots. Thanks for asking though.
I'm not sure I completely understand your question, but from what I think you are asking, we used capped shafts on each side to allow the center of the choo choo mechanism to be able to slide through the middle. If you look closely at some of the shots, they should give you a good idea of how it's attached.
how many rubber bands are in the intake? Also how many and which rubberbands are you using for the catapult? My team is struggling to get an accurate shot every time and we can't find the right amount of tension from the bands.
We use ~4 #33 rubber bands for the intake roller. As for the catapult, ~3 #33 rubber bands seem to work fine. But that will not necessarily be the right number for yours. The right ballpark, maybe, but every catapult is different. It's hard to get the right geometry for a consistently accurate shot, and it just takes a lot of trial and error. Basically, there are a few distances that will work, and many many more that won't. You are just trying to find the ones that do work. Once you get it, it'll work great in my experience. Good luck!
Wow i love it! I wanted to make a root like that but my team joined weeks late so we had to make a robot without instructions. Are their instructions for the SpitFire? I am new its my first year lol.
No, there are not instructions. VEX is about making your own robot. You can use others for inspiration, but ultimately it is your robot and you have to make it. Also, even if I wanted to give you instructions, I couldn't because they simply don't exist. Thanks for asking though, and good luck with your robot.
I recentley made a robot that can high hang... but it uses piston springs instead of rubber bands for the catapult. Much more reliable. You might need it later on.
I did a two motor intake for two main reasons. Firstly, it lets me run a much faster gear ratio on the intake and still have plenty of torque. Second, although there is room for an H-Drive, and originally it did have one, I am far more comfortable driving tank drive than a strafing drive. I'm just a lot more used to it, and so an H-Drive wouldn't really benefit me a lot. To align against the wall, it's a combination of driver practice and that the robot likes to line up on the wall when I back up into it by design. Since it uses the wall as a hard-stop, if I back up into it, and I'm at a little bit of an angle, it corrects itself.
Hello! I would like to ask, how much teeth dooes the gear that has the catapult system, I know the small one has 12 teeth, but I can't seem to find the other one, maybe I am just blind or something, but I can't seem to find that part.
Do you know why my catapult just stops turning before the breaking point? If I push with my hand it works. I can see the motors trying but it doesn't turn; it worked before
Nice job picking up on that! It was because the I started filming the reveal with the first design (the one with the standoffs), and then reiterated it to make it work better, hence the second design (the one with the rubber band holders). Both designs work great, it's just that I found the second one to work better.
Hello, our team is called HighQ Robots. We have a robot like yours but have one question. Our intake isn't that smooth and so if we pick up 3 or more balls at once the intake stops spinning, could you please tell us how you make your intake go so smoothly. By the way we have got into too worlds! :)
Congrats on getting to worlds! I would guess the intake is not spinning because it stalling and the ball is getting it stuck. I would suggest centering the ball with little pieces on the outside on the way up that nudge the ball to the center a little bit. Try some different configurations of pieces giving the balls a push to the inside. Let me know how it goes.
I am looking forward to trying out the new VEX IQ gen 2. All of my robots currently are gen 1, so you can build this with just gen 1 parts if you were wondering.
It is a choo-choo mechanism, but a slip gear could also be a viable design. Here's a video (not mine) on how it works if that helps: th-cam.com/video/EPYMKsh-vpA/w-d-xo.html
The video should give you a good idea of how to build it, and there are some detailed shots that show how I built mine. If you wanted to know more about how the concept works, check out this video: th-cam.com/video/EPYMKsh-vpA/w-d-xo.html. If you have any specific questions, feel free to comment, and I'll see what I can do to answer them. Good luck!
Hello we have been working on this robot and its almost done... But the intake looks as in it's in the same hole as yours and we cant get the ball to go up in the catapult any tips or solutions
I would try moving it around a little. Try different surrounding holes, and see what works best. It's your robot, not mine. You could move it higher, lower, in, and/or out.
The only sensors that we use are two LED light sensors facing each other to detect the position of the catapult. The concept is similar to a beam break sensor. One of the sensors is purely just an LED to make it work better (by providing more contrast between when the catapult is and isn't there), while the other one detects the value of the brightness, and since there is a black piece very close to the sensor when the catapult goes past it, it works very well. Does that help?
@@Joseph973 Yes! Thank you so much, currently building something like this and I am having trouble getting the catapult to work. The pieces don't go all the way down, but I will try adding the sensor to see if it helps. Thank you!
There are two color sensors, one on each side of the catapult. They are used to detect the position of the catapult. One of them is used purely as an LED to give the other one more light and consequently more accurate readings. We use them to detect the greyscale. When the catapult is up, the light sensor sees the white LED, giving a very low value. When the catapult is down, it sees a black piece very close to the sensor, giving a very high number. Through this method we can determine when the catapult is there or not, and know that position of it.
@@orca2191 Yes. We wanted to make things as easy as possible for the driver, so we made one button press shoot and reload the catapult. It lets the driver focus on other things without having to worry about the position of the catapult.
@@Joseph973 why use a sensor to reload the catapult when you could code it so the catapult would spin the right amount of times to reset perfectly. Wouldn’t it be less complicated?
@@orca2191 Yes, it would be less complicated, and I have no evidence saying it wouldn't work. However, I haven't tried it. I would be worried that the motors would lose zero or if you started it just a little bit off, it would mess up the whole match. Let me know how it goes though.
We followed the Vexcode programming template for a catapult mechanism. However, after creating a motor group for the two catapult motors the catapult fails to launch when the button is pressed.
I'm not going to share the actual code, but I can tell you the gist of how it works. It is basically just a preset. The light sensors tell the brain where the catapult is, and from there you can use dead reckoning to put the catapult to the position that you want. You basically just say, "if this button is pressed, then spin catapult to position [x] degrees.
How do you sustain rubber band tension, as for our robot the tension varies per shot, meaning sometimes it overshoots and sometimes it misses entirely?
A longer catapult arm will give you a more consistent shot, and the less power you need to get it in the goal, the more consistent it'll be. Also, make you you are shooting from the same spot in the same way every time.
Hello, I admire the design of your robot and I have a question about copyright for it. My team and I recently competed in a VEX IQ tournament and we saw a robot with a piece for piece design of your robot. The team that used this design claimed it as their own and we were wondering if there were any restrictions against this. Thank you and hope to here from you soon.
While I did create this design, there is nothing I can do if someone has a copy of my robot and claims the design as their own. While I would appreciate it if they gave some credit, especially if they copied it piece for piece, they did build the robot and it is their robot. So there isn't much I can do, even though they did take my design. Good luck!
So currently my team has a gear drivetrain, we just went to first competition but we did not have time for a catapult, my team and I don't really like chain drives so is there is a way to do a gear drive but still have the motors mounted *about* where they are on this robot?
Me and my team tried, but its impossible since there will be not enough space for the catapult motor and the only space there is too put it will block the catapult from going all they way down (at least in my case since I built kinda a different but super similar version to this robot) just got the chains yesterday and finished building the drivetrain just need the catapult to work 😃. Just try to get chains, otherwise you would need to almost completely remodel the robot, I could be wrong but I kinda did spend 50 hours trying to figure out if I could do it without the chain and still have space for the catapult, so my best guess is for you to order the chain, 1 pack should be enough. Hope this helps! Good luck my fellow competitor 😄
Yea we had a practice today too, I'm in a public team, NorthWood Robotics Team C and we have a TON of chain. I just built a new intake for our secondary which is just a tester, one of my teammates MAY have figured out a solution to the gear/chain issue, but I also had an idea for a chain drive, I'll have to discuss tomorrow, I'll update then :D
@@vylet4807 Personally, I would highly recommend a chain drive because chain has much less friction than gears, and so it makes your robot drive and accelerate faster. It also is much less work and allows you to mount the motors in a wider range of places than gears allow you to.
@@Joseph973 Yes we have decided to just stick with chain because while I was working on a catapult mechanism my teammates found it too hard and confusing. Thanks anyway!
@@Joseph973 thanks for the close up shots of the catapult and ideas for drivetrain :D we just went to our second competition yesterday and won excellence!!! I was also able to help another team with a catapult I also have ideas for a 6-8 ball holding design using your wall-intake support for the 3rd and 4th
@@vavzerra We use a light sensor to detect it because we found that it is more consistent and works better. But we also tried a bumper sensor and got it to work pretty well.
If you only had 4, you could use only one motor each on the intake and the shooter, and use something close to a 4:1 gear ratio on it. It'll be a little slower, but it will work (I've made it work).
@@majestico_dragon6949 I buy them from VEX. Here's the link. Just scroll down until you see the "Long Shaft Add-On Pack", and then change the quantity to 1 (or however many you want). www.vexrobotics.com/drive-shafts.html?q=&locale.name=English
@@Joseph973 For the catapult, how do you stop the gear from getting stuck from the bar attaching both the 24 tooth gears? (is the beam connected to both motors, or are they separate beams)
There are plenty of shots in this video that should give you a good idea of how to build it. But no, there are not build instructions, largely because that is the against the spirit of VEX's whole philosophy of building your own robot, not someone else's. Pictures are fine, and lots of people make robot reveals, but build instructions cross the line of how much is and isn't allowed to be shared. Lastly, even if I wanted to give out build instructions, I couldn't because I don't have any. They just don't exist. Thanks for asking though.
@@lucuschamberlain949 I don't think that would be in the spirit of VEX either. VEX is about designing and building your own robots, not taking someone else's design and copying it. While VEX does release build instructions for robots, they are very simple, low level robots. Releasing instructions for a very competitive robot that could win many events is something completely different. Why don't you talk to your dad about it and get his take on it?
@@animasyonyapmc7644 There isn't a parts list or instructions for this robot, plus it was for last years challenge. It uses 6 motors, a brain + battery, a mass of wires, and a heap of VEX IQ structure pieces as well as a ball of rubber bands.
Our catapult detaches from gears every time we run it. We tried with different rubber bands (varying tension) with no luck. How is your design holding up? Also I see you grouped 24 tooth gears, how did you do that and why? We are struggling from 2 weeks to get this working 😟
For your first question, different catapults are different and there isn’t a “one size fits all” solution. So with one solution that works for me may not work for you. However, I've found two main solutions that I’ve found to work. You can either make the catapult stronger or divert the force somewhere else. I would suggest making the force go somewhere else not into the catapult. If you look at Fling (starting on page 35 of the build instructions), you’ll notice that there is an axle above the catapult that stops it just before it reaches the point where it would fully extended and put all the force on the catapult mechanism. So if you put something like that on your robot to put all the force into an axle right before it would usually break the mechanism, it should help keep it from breaking itself. We put two sets of 24t and 48t gears to keep them from skipping and just to overall build a robust catapult. Also, you need to spin both 48t gears to make it work, so we have two runs of gears to do that. 1:10 and shots like it should give you an idea how to build it. Good luck with your robot!
@@a.9976 If you are talking about the plastic protector for the sheets, we took those off when we got the field. We've just used them so much that the edges are beginning to come apart. It's just the nature of the polycarbonate. If I misunderstood your question, please let me know.
Do you know why only one side of my catapult turns after a while, just before the breaking point? It will simply not true and then the catapult won't shoot. Any ideas why and how to fix it?
We use ~#32 rubber bands (the two legal sizes are #32 and #64). Technically, the rubber bands are #33, but they are so close to #32 that not only would no one notice or care, they act virtually the same (the only difference is the #33 ones are 1/2" longer). I have used both #32 and #33 and found no difference. Here is where we bought ours if you were interested: www.amazon.com/gp/product/B0147GH36G/.
![[LIVE] : ONE ลุมพินี 89 | คู่เอก "ยอดไอคิว vs คิริลล์"](http://i.ytimg.com/vi/Z3vYkHJ_5Ig/mqdefault.jpg)
I remember the good old days of vex. Like holy cow 2 year? It feels like yesterday
prove it
That’s not sigma jason
I am a dad new to the vex iq world and l just want to tell you that you truly are an inspiration for me an my kids. Thank you for your hard work and for sharing your work with the rest of us.
that's the bot that I'm currently building! Just need to finish up the launcher mechanics and I'm done! Anyways, love the video. The editing, the music, and the bot are amazing!
Thanks! I'd love to see your robot when you're done.
My team had to switch to slick a robot from a few years ago because we couldn’t finish that one it time for comp😕
Me too! I hope my team makes it to worlds
@@cindermanic State hasnt even happened yet...
@@RileyMarkley yes it has
I loved the editing on this video!
Great robot and great video! Good luck this season.
Thanks, but I'm not actually officially in VEX IQ anymore. I just build robots for fun and to have something to do with all the pieces :). I can't wait to see what you guys come up with this year!
Thanks for the tip we will try it out for sure! Thanks again!
Anyone wanna take a guess at how many of these well be seeing this year?
Dude I have my first comp in a few weeks and am struggling to get a launcher
when i went to a tournament there was 50 teams and only 5 could shoot balls :,(
We had the same design! Great minds think alike!
My daughters team LOVES this robot idea
Ngl these editing skills are RAD
nice! A very Gearsquad-esque color scheme but minus the yellow lol
Do you have build instructions anywhere or more detailed picture for reference
theres a lot of tension from one side, how did u make it that the catapult stays down for the balls to come in. For example, we dont want it to continuously shooting, after shooting we want it to come down and stay there until we press something on the controller again. But the elastics have a lot of force which is stopping the catapult to go down fully. Do we need special code or some sort of sensor. If so whats the name of the sensor. Good luck this season
Add more torque to catapult so u can pull rubber bands
@@craacked4538 from the code?
Use a distance sensor
Me and my daughter saw a lot of similar Robots at her first competition she decided to make one herself! She’s currently trying to attach the bar for the claw gears, an6 tips for her?
If it rips itself apart or something like that, you might check out these topics on VEXforum: www.vexforum.com/t/how-to-get-enough-lift-into-the-catapult-system/96670 and www.vexforum.com/t/catapult/97105. Good luck, and I'm looking forward to hearing how it goes.
@@Joseph973 Thank you Joseph for the inspiration this is a big project for three ten year olds but they're working hard to use this video to guide/inspiration for their building with some mods of course.
Thank you once again for the video, can this bot be built using parts for squared away challenge?
I suppose that you could use Squared Away parts to build this robot, but you'd probably be missing some pieces. I'm not sure I understand you question. Can you try to rephrase it?
Plz make a 1-2 hour tutorial on how to build this robot irl
This robot was for last year's game. Why do you want a tutorial on it? In any case though, this robot is long taken apart, so I can't make a tutorial on it.
VERY COOL!!
I am Mr. Bakhoum Senegalese I am a physical science teacher and a lead a robotic club in my school.
We participate in many competitions first global 2018 and 2019 and the Pan-African Robotic competition since 2015.
This year the challenge rules are similar to what we see in the video.
So I would like to ask you if you can help to prepare for the competition by giving the design of the robot I mean all the steps we need to know to build it.
our problem will be the catapult.
thank you
Hello, this robot was actually for last year's challenge. The new challenge is Slapshot, and will need a different robot. Also, I cannot share the building instructions because they just don't exist. We built this robot in real life, and consequently there are no instructions. In fact, this particular robot is no longer together, as we needed the pieces for other robots. Thanks for asking though.
For you catapult what do you put for your number. For example it says detector brightness in % < x
Will we be seeing any new robots from you this season??
Yes, we will be releasing our next robot soon.
@@Joseph973 I can't wait to see it
How did you attach the choo choo linkage to the robot so it could launch the catapult?
I'm not sure I completely understand your question, but from what I think you are asking, we used capped shafts on each side to allow the center of the choo choo mechanism to be able to slide through the middle. If you look closely at some of the shots, they should give you a good idea of how it's attached.
@@Joseph973 Thank you!
Can you please consider the work from all sides or see the assembly please !?
when are you releasing your new design
My daughter loves this song, what’s it called?
The Nights by Avicii: th-cam.com/video/XmIgg9De9hY/w-d-xo.html
how many rubber bands are in the intake? Also how many and which rubberbands are you using for the catapult? My team is struggling to get an accurate shot every time and we can't find the right amount of tension from the bands.
We use ~4 #33 rubber bands for the intake roller. As for the catapult, ~3 #33 rubber bands seem to work fine. But that will not necessarily be the right number for yours. The right ballpark, maybe, but every catapult is different. It's hard to get the right geometry for a consistently accurate shot, and it just takes a lot of trial and error. Basically, there are a few distances that will work, and many many more that won't. You are just trying to find the ones that do work. Once you get it, it'll work great in my experience. Good luck!
Wow i love it! I wanted to make a root like that but my team joined weeks late so we had to make a robot without instructions. Are their instructions for the SpitFire? I am new its my first year lol.
No, there are not instructions. VEX is about making your own robot. You can use others for inspiration, but ultimately it is your robot and you have to make it. Also, even if I wanted to give you instructions, I couldn't because they simply don't exist. Thanks for asking though, and good luck with your robot.
💯💯🔥🔥🔥🔥
I recentley made a robot that can high hang... but it uses piston springs instead of rubber bands for the catapult. Much more reliable. You might need it later on.
Thanks for the suggestion, I'll look into it.
my robot who uses both:
Why do you have a two-motor ball intake?
Also, is there a reason you chose not to have a H-drive?
also how do you align to the wall so easily?
I did a two motor intake for two main reasons. Firstly, it lets me run a much faster gear ratio on the intake and still have plenty of torque. Second, although there is room for an H-Drive, and originally it did have one, I am far more comfortable driving tank drive than a strafing drive. I'm just a lot more used to it, and so an H-Drive wouldn't really benefit me a lot.
To align against the wall, it's a combination of driver practice and that the robot likes to line up on the wall when I back up into it by design. Since it uses the wall as a hard-stop, if I back up into it, and I'm at a little bit of an angle, it corrects itself.
Hello! I would like to ask, how much teeth dooes the gear that has the catapult system, I know the small one has 12 teeth, but I can't seem to find the other one, maybe I am just blind or something, but I can't seem to find that part.
It's actually a 24 tooth gear to a 48 tooth gear. If you don't have those though, a 12 tooth gear to a 36 tooth gear will work just fine.
Do you know why my catapult just stops turning before the breaking point? If I push with my hand it works. I can see the motors trying but it doesn't turn; it worked before
wait the catapult ball holder thing changed in two parts of the video 🤔
Nice job picking up on that! It was because the I started filming the reveal with the first design (the one with the standoffs), and then reiterated it to make it work better, hence the second design (the one with the rubber band holders). Both designs work great, it's just that I found the second one to work better.
@@Joseph973 oh, cool thanks
Hello, our team is called HighQ Robots. We have a robot like yours but have one question. Our intake isn't that smooth and so if we pick up 3 or more balls at once the intake stops spinning, could you please tell us how you make your intake go so smoothly. By the way we have got into too worlds! :)
Congrats on getting to worlds! I would guess the intake is not spinning because it stalling and the ball is getting it stuck. I would suggest centering the ball with little pieces on the outside on the way up that nudge the ball to the center a little bit. Try some different configurations of pieces giving the balls a push to the inside. Let me know how it goes.
Did you use plastic axels for the choo choo mechanism?
Yes, we use plastic axles, and they seem to work just fine (we've run them pretty hard and never had any issues with them).
@@Joseph973 Thanks for the speedy response
how does it score blocks joseph :(((9
It would be nice if we actually had vex 2.0 and the instruction to build things like this
I am looking forward to trying out the new VEX IQ gen 2. All of my robots currently are gen 1, so you can build this with just gen 1 parts if you were wondering.
We gonna try building this in school lol for robotics 2022
I was just wondering is that launcher a slip gear or is it something else?
It is a choo-choo mechanism, but a slip gear could also be a viable design. Here's a video (not mine) on how it works if that helps: th-cam.com/video/EPYMKsh-vpA/w-d-xo.html
How do you build the catapult? I have the rest of the robot done but stuck with the mechanism for the catapult.
The video should give you a good idea of how to build it, and there are some detailed shots that show how I built mine. If you wanted to know more about how the concept works, check out this video: th-cam.com/video/EPYMKsh-vpA/w-d-xo.html. If you have any specific questions, feel free to comment, and I'll see what I can do to answer them. Good luck!
Where can I get a building guide to build this robot?
Hello we have been working on this robot and its almost done... But the intake looks as in it's in the same hole as yours and we cant get the ball to go up in the catapult any tips or solutions
I would try moving it around a little. Try different surrounding holes, and see what works best. It's your robot, not mine. You could move it higher, lower, in, and/or out.
@@Joseph973 thank u so much it helped
Love this robot! What sensors are you guys using and for what? Thanks
The only sensors that we use are two LED light sensors facing each other to detect the position of the catapult. The concept is similar to a beam break sensor. One of the sensors is purely just an LED to make it work better (by providing more contrast between when the catapult is and isn't there), while the other one detects the value of the brightness, and since there is a black piece very close to the sensor when the catapult goes past it, it works very well. Does that help?
@@Joseph973 Yes! Thank you so much, currently building something like this and I am having trouble getting the catapult to work. The pieces don't go all the way down, but I will try adding the sensor to see if it helps. Thank you!
Where can I find the instructions for it
If you don't mind, what's the sensor inside the catapult for?
There are two color sensors, one on each side of the catapult. They are used to detect the position of the catapult. One of them is used purely as an LED to give the other one more light and consequently more accurate readings. We use them to detect the greyscale. When the catapult is up, the light sensor sees the white LED, giving a very low value. When the catapult is down, it sees a black piece very close to the sensor, giving a very high number. Through this method we can determine when the catapult is there or not, and know that position of it.
@@Joseph973 Is it used to automatically lower the catapult?
@@orca2191 Yes. We wanted to make things as easy as possible for the driver, so we made one button press shoot and reload the catapult. It lets the driver focus on other things without having to worry about the position of the catapult.
@@Joseph973 why use a sensor to reload the catapult when you could code it so the catapult would spin the right amount of times to reset perfectly. Wouldn’t it be less complicated?
@@orca2191 Yes, it would be less complicated, and I have no evidence saying it wouldn't work. However, I haven't tried it. I would be worried that the motors would lose zero or if you started it just a little bit off, it would mess up the whole match. Let me know how it goes though.
Catapult won’t launch. Can you help us with our code? We followed the Herobot-Fling template.
Can you describe the problem in more detail? I'm not sure what the problem is, and there is a million things that could make it not shoot. Thanks!
We followed the Vexcode programming template for a catapult mechanism. However, after creating a motor group for the two catapult motors the catapult fails to launch when the button is pressed.
can you put send a picture of the hanging button code?
I'm not going to share the actual code, but I can tell you the gist of how it works. It is basically just a preset. The light sensors tell the brain where the catapult is, and from there you can use dead reckoning to put the catapult to the position that you want. You basically just say, "if this button is pressed, then spin catapult to position [x] degrees.
Hi what is the sprocket connected to your motor for the drivetrain ?
I use a 2:3 sprocket ratio. A 36t sprocket on the motor and 24t sprockets on the wheels.
can you show us how to build it?
How do you sustain rubber band tension, as for our robot the tension varies per shot, meaning sometimes it overshoots and sometimes it misses entirely?
A longer catapult arm will give you a more consistent shot, and the less power you need to get it in the goal, the more consistent it'll be. Also, make you you are shooting from the same spot in the same way every time.
Hello, I admire the design of your robot and I have a question about copyright for it. My team and I recently competed in a VEX IQ tournament and we saw a robot with a piece for piece design of your robot. The team that used this design claimed it as their own and we were wondering if there were any restrictions against this. Thank you and hope to here from you soon.
While I did create this design, there is nothing I can do if someone has a copy of my robot and claims the design as their own. While I would appreciate it if they gave some credit, especially if they copied it piece for piece, they did build the robot and it is their robot. So there isn't much I can do, even though they did take my design. Good luck!
So currently my team has a gear drivetrain, we just went to first competition but we did not have time for a catapult, my team and I don't really like chain drives so is there is a way to do a gear drive but still have the motors mounted *about* where they are on this robot?
Me and my team tried, but its impossible since there will be not enough space for the catapult motor and the only space there is too put it will block the catapult from going all they way down (at least in my case since I built kinda a different but super similar version to this robot) just got the chains yesterday and finished building the drivetrain just need the catapult to work 😃. Just try to get chains, otherwise you would need to almost completely remodel the robot, I could be wrong but I kinda did spend 50 hours trying to figure out if I could do it without the chain and still have space for the catapult, so my best guess is for you to order the chain, 1 pack should be enough. Hope this helps! Good luck my fellow competitor 😄
Yea we had a practice today too, I'm in a public team, NorthWood Robotics Team C and we have a TON of chain. I just built a new intake for our secondary which is just a tester, one of my teammates MAY have figured out a solution to the gear/chain issue, but I also had an idea for a chain drive, I'll have to discuss tomorrow, I'll update then :D
@@vylet4807 Personally, I would highly recommend a chain drive because chain has much less friction than gears, and so it makes your robot drive and accelerate faster. It also is much less work and allows you to mount the motors in a wider range of places than gears allow you to.
@@Joseph973 Yes we have decided to just stick with chain because while I was working on a catapult mechanism my teammates found it too hard and confusing. Thanks anyway!
@@Joseph973 thanks for the close up shots of the catapult and ideas for drivetrain :D we just went to our second competition yesterday and won excellence!!! I was also able to help another team with a catapult
I also have ideas for a 6-8 ball holding design using your wall-intake support for the 3rd and 4th
is there a bumper sensor?
or do the optical lights detect that?
@@vavzerra We use a light sensor to detect it because we found that it is more consistent and works better. But we also tried a bumper sensor and got it to work pretty well.
@@Joseph973 Thank you so much! I'm trying to build this robot for the worlds event 2022
how do you hang. do you have a button on your controller for that
Yes, I have a button on my controller that puts it at the right height to hang.
@@Joseph973 Can you make a video on how to code the hanging part?
Can you give me some starters to start building this robot because I really do admire it and I think that it'll help my team a lot.
Nice robot
Do you think this is possible to make with 1 VEX robotics set? (could we remove one of the two motors so instead of 6 its 4)
If you only had 4, you could use only one motor each on the intake and the shooter, and use something close to a 4:1 gear ratio on it. It'll be a little slower, but it will work (I've made it work).
@@Joseph973 Thanks!, what is your current gear ratio?
@@majestico_dragon6949 Currently with two motors I am running a 2:1.
@@majestico_dragon6949 I buy them from VEX. Here's the link. Just scroll down until you see the "Long Shaft Add-On Pack", and then change the quantity to 1 (or however many you want). www.vexrobotics.com/drive-shafts.html?q=&locale.name=English
@@Joseph973 For the catapult, how do you stop the gear from getting stuck from the bar attaching both the 24 tooth gears? (is the beam connected to both motors, or are they separate beams)
How do you stop your bar from getting ripped out of the gear?
I replied to your other comment. Let me know if you have any other questions.
Tutorial please
Yo do you have build instructions?
There are plenty of shots in this video that should give you a good idea of how to build it. But no, there are not build instructions, largely because that is the against the spirit of VEX's whole philosophy of building your own robot, not someone else's. Pictures are fine, and lots of people make robot reveals, but build instructions cross the line of how much is and isn't allowed to be shared. Lastly, even if I wanted to give out build instructions, I couldn't because I don't have any. They just don't exist. Thanks for asking though.
@@Joseph973 oh ok, my dad works for vex and I though maybe we could buy ur designs to put out on the page for whole.
@@lucuschamberlain949 I don't think that would be in the spirit of VEX either. VEX is about designing and building your own robots, not taking someone else's design and copying it. While VEX does release build instructions for robots, they are very simple, low level robots. Releasing instructions for a very competitive robot that could win many events is something completely different. Why don't you talk to your dad about it and get his take on it?
intermittent gear catapult or choo choo
It's a choo-choo
How do you make it
Hello dear.Can you give your robot steps.
What’s your build
what are the materials
fast reply please
@@animasyonyapmc7644 There isn't a parts list or instructions for this robot, plus it was for last years challenge. It uses 6 motors, a brain + battery, a mass of wires, and a heap of VEX IQ structure pieces as well as a ball of rubber bands.
what is the gear ratio on the catapult?
We used a 2:1 gear ratio on the catapult, as in the motors spin twice for every one time that the catapult spins.
Our catapult detaches from gears every time we run it. We tried with different rubber bands (varying tension) with no luck. How is your design holding up? Also I see you grouped 24 tooth gears, how did you do that and why? We are struggling from 2 weeks to get this working 😟
For your first question, different catapults are different and there isn’t a “one size fits all” solution. So with one solution that works for me may not work for you. However, I've found two main solutions that I’ve found to work. You can either make the catapult stronger or divert the force somewhere else. I would suggest making the force go somewhere else not into the catapult. If you look at Fling (starting on page 35 of the build instructions), you’ll notice that there is an axle above the catapult that stops it just before it reaches the point where it would fully extended and put all the force on the catapult mechanism. So if you put something like that on your robot to put all the force into an axle right before it would usually break the mechanism, it should help keep it from breaking itself. We put two sets of 24t and 48t gears to keep them from skipping and just to overall build a robust catapult. Also, you need to spin both 48t gears to make it work, so we have two runs of gears to do that. 1:10 and shots like it should give you an idea how to build it. Good luck with your robot!
Hello! Does anyone have assembly instructions? Please, help
there are no assembly instructions.
btw the plastic sheet has another thin piece of plastic stuck to it
I'm sorry, but I don't understand your question. Can you rephrase it?
@@Joseph973 The clear plastic sheet has another piece of thin plastic stuck to it that you can take off.
@@a.9976 If you are talking about the plastic protector for the sheets, we took those off when we got the field. We've just used them so much that the edges are beginning to come apart. It's just the nature of the polycarbonate. If I misunderstood your question, please let me know.
@@Joseph973 Oh sorry I'm stupid 😂
@@a.9976 No problem.
My teacher sent me this even though I program the robots without useing blocks they hurt my fingers
avicci
1:18
I wish I could've competed this year, we got excellence last year. sad
we could've had lots of momentum
@@akshayjana5071 I'm sorry you couldn't compete. I hope you had fun last year!. It sounds like you did great.
Hey I know you
@@misterguyschannel260 And you are...?
Do you know why only one side of my catapult turns after a while, just before the breaking point? It will simply not true and then the catapult won't shoot. Any ideas why and how to fix it?
I'll need some more details to give you some ideas.
What rubber bands do you use?
We use ~#32 rubber bands (the two legal sizes are #32 and #64). Technically, the rubber bands are #33, but they are so close to #32 that not only would no one notice or care, they act virtually the same (the only difference is the #33 ones are 1/2" longer). I have used both #32 and #33 and found no difference. Here is where we bought ours if you were interested: www.amazon.com/gp/product/B0147GH36G/.
1:12