67101C Early Season Change Up Reveal. This is our early season reveal for the Vex 2020-2021 game, Change Up. We have limited parts to build with so certain areas aren’t exactly how we want them (like the plate on the back that sticks out).
Robot Specs:
Drive train: 4 motor drive 280 rpm 4 in wheels
Intakes: 600 rpm 18 tooth sprockets
Lift: 600 rpm 24 tooth sprockets
Sorry for the lack of background music. Feel free to provide any feedback you want.
i noticed there arent 9 motor on this. why
Oops. We forgot our most important non functional decoration.
Hey in all seriousness though don’t have a motor as a decoration at a tournament because that is illegal. I know this is dumb but true
Yay, we know it doesn’t count as a nonfunctional decoration even though it is one.
I have noticed from the video that your drive train is loud and most of the robot is making sounds this could be the problem
You think that there is extra friction in the drivetrain that is making all the noise? We can mess around with the spacing and see if that makes it quieter. Thanks for the feedback.
Yes, a couple of ways we test for friction is putting a shaft encoder on a wheel that’s not being directly driven and find the rpm value, and compare it to the supposed ratio value. Another way we test is programming the robot to drive straight along a line. One of the factors that might cause a robot to drive crooked is increased friction. Other than that large amounts of squeaks should be a tell for excess friction.
the best way to test friction is just to disconnect the shafts from the motors, and see how long it free spins for. should be over 5 seconds.
Should be closer to 30 seconds
depending on how complicated the gearing is. if you have direct driven wheels it could free-spin for 30 seconds, but once you start getting gears in I doubt you’ll be able to free-spin for more than 10 seconds, and even less if you have a lot of gears.
Depends on a lot of different factors
For the particular gear setup being referred to in the pic that should be able to spin for more than 10 seconds at minimum
yeah sounds about right. I have 5 gears on mine and it spins for around 10 seconds.
Ngl, if you 3d print a couple of V5 motors at 75% scale and attach in random places on your robot… It’s gonna be hilarious when some inspectors will notice that…
What are y’all doing?
My guess would be he’s doing two gears that connect to two wheels (obviously) and a gear connecting the 2 gear sets together, making it a 5 gear set
What do you mean? Too much or too little?
I think he means the number of gears
5 gears it too much? I hope not…