hy, everyone , our team’s situation is way too complicated. After we built the whole robot , we found out that the robot couldn’t cross the middle field bar because of its heaviness , unfortunately we can’t substruct any of the mechanisms used so we’re trying to find a solution we’ve tried so many so far of the prototypes we’ve seen on youtube or we thought about, but the ones with the 3,25 " cause we can’t afford it . But the thing is that why didn’t anybody think of a standard drivetrain using two wheels each part directly attached to the motors which will give the whole robot and especially the drivetrain more power : the first wheel will slide pretty easily if it’s attached in the first hole of the C-channel and the other not as much but we can make it easier building some slides
edit: The topic title was edited by the moderators
Do you have blue (600 rpm) motor cartrages? What size wheels do you have? You could do 6 4 in wheels geared 36:84 or 8 2.75 in wheels geared 36:48. How many motors do you have not used? Most competitive bots I’ve seen use 6 11watt, 4 11watt, or 4 11watt and 2 5.5watt. In general also try moving your mechanisms so they’re more balanced on the bot. My team uses pulleys mounted on a c-channel to cross the barrier.
I’m guessing your using 2.75 inch wheels. If you aren’t getting over I’d like to recommend to use blue motor cartridges or if you don’t have any you could gear what ever you have for speed. You don’t necessarily need to worry about torque. You might need to add a third wheel in the middle so you don’t get stuck halfway, depending on how fast or small your robot is.
and I actually thought about this idea because we got stuck so often and tried so many things but we couldn’t make it so I was like : what if I don’t use anything in the middle and so the omniwheel in the front will just move until the barrier meets the second omniwheel that’ll slide over the barrier
But what I mostly need is like what are the struggles that I might face
A picture of your robot’s drivetrain and another of it trying to go over the barrier would be greatly appreciated, but going off of what you said, here are some tips:
Re-distribute the weight on your robot more evenly (move your pneumatics tanks/mechanisms around)
Use a flex wheel for the center wheel and make a gear train to power it
Use less steep barrier sleds, or attatch a small 2in flex wheel connected to the drivetrain by chains at the front of your robot where barrier sleds would go
Gear down your drivetrain
For more specific tips or recommendations, a thorough description of why your robot isn’t going over the barrier (like “robot tips backwards”, “gets stuck between 1st and center wheel”, or “not even going on top of the barrier”) and images of your robot would greatly help us help you.
Also, I believe this category would fit better under VEX V5 General Discussion or General Forum
Okey, hey guys, I’m again stuck with my team’s drivetrain, we’re using 600 rpm with a drivetrain of 3 omniwheels , and I just saw a video that actually explains that the best rpm for omni wheels is 343 which i still don’t get how can I do it, any ideas for how I can improve my drivatrain , using 600 rpm , also can i use like a drivetrain with 3 omniwheels but the gear ratio of 36 /60 using like a 36 gear, 84 gear, 36 gear, 84 gear and 60 gear the motors in the 36 gears and the omniwheels in the 36 gears and the 60 gear one ?
