Great design!!, there is another hybrid robot for vex U, but this one looks quite better and efficient, however I would like to know how many balls the lifter robot can score during driver controled period and how much time does it takes to lift your alliance , and also, how much time does it takes to the holonomic robot to ran out of driver loads.
Thanks
Ps: At this point in the season it seems really impressive and awesome
These are fantastic designs, especially for early in the season! I have a few questions for you if you don’t mind answering them.
How long does it take for each robot’s launcher to get back up to speed after firing a shot?
Also, using only one motor for each wheel, have you run into any problems with motors overheating?
What steps have you taken to avoid friction?
How far apart are your wheels? (Either from center or edges)
Also, how wide is the ramp on 4423C and how wide is 4502G?
The code i use in both robots gives a great accuracy but also increase the cooldown a bit, it takes about 1,3 seconds so that the pid error is 0 steady.
4502G has the advantage of angle, almost 45, for the full court shot uses only the half motor power, is very unlikely to overheat even with two motors
4423C has a larger angle then uses more power, is proven to works fine in 2 minutes shooting 30 balls, then everything depends on the battery level
We use plenty of lubricant and only the necessary spacers
The wheels are completely together, we use two to have more force
force = mass * acceleration
The ramp is just under 18 inches wide and 4502G is 16 but almost any robot fits in it.
I apologize for any grammatical mistake, English is not my native language:)
Sorry, I meant the distance between the two different axles that the wheels are on.
A 1.3 second delay between shots is really good in my opinion, especially with the amount of accuracy you have. What do you think is the biggest factor that contributes to an inaccurate shot?
Yes maybe at this point of the season but probably at worlds most competitive robots will shoot twice as fast with 100% accuracy. Singapore is already close to that
At this time I can not explain why 4502G miss those balls, having in mind the difference in density of the balls we shoot the squishy first, then raise the speed for the rest. there are many other factors that can affect the accuracy fortunately we have the rest of the season to identify and solve.
That sounds like a great solution to the problem of the balls varying in density. How do you figure out which ones are squishiest before the match though? Do you go through all the balls and squish them to get an idea of how dense they are and then sort them accordingly?
Also, one more question about the flywheels. Do you use a ratcheting mechanism?
I apologize if I’m bothering you with so many questions.
Yes you are right we have three preset speeds to shot different balls, the job of the co-driver is to separate the balls for each speed prior the match and then load them to the robot while the driver changes the speed accordingly.
Sorry but programming is the key point of our robots, I will keep that secret.
Anyway I told you what I’m doing, there is some information about it on internet, if you have enough experience in pid control you can develop your own, it is very effective…
