i saw a lot of behind the bumpers of rapid react and i wondered, was there a robot that did not use pneumatics in this year, and if so how did they build the climbing and the intake.
1 Like
I dont know for sure, but look at teams who had motor elevated intakes. Iirc 118 and 148.
1 Like
Ik that 1678 got rid of them at a certain point. They didn’t have them for comp season.
1 Like
We didn’t use pneumatics at all in the 2022 season. Here is our published cad: https://grabcad.com/library/atlas-23
1678, 4414, 1323, 1690, 1577, 971, 148, etc. all didn’t use pneumatics.
Most non-pneumatic intakes were usually actuated with sprocket and chain (with the occasional belt deployment)
I would look at 1678 and 1577 for examples of simple non-pneumatic climbers (though all the teams above had pretty cool mechanisms)
6 Likes
There are a lot of ways to avoid pneumatics. (I will leave the why to others)
The how:
Motors and servos (just a fancy motor control loop in a box remember) are perfectly adequate for this task and may perform better considering the level of control one has over them. Dynamic control of pneumatics is not really a thing in FRC. In the case of intakes: some compliance isolating the actuator is almost always a good idea: you want something to deform before shock loading a (planetary) gearbox. Often this is a polycarbonate spring or a short segment of string. This is particularly important with servos (after all, it’s a small gearbox), just pull the mechanism into the bot with a spring or surgical tubing and pull it out with the electrical actuator (may be more important to “fail safe” some years than others).
Lots of ways to do this. 2767 is far from the only team that avoids pneumatics, but there is lots of good examples on how to do it effectively on those bots. Check out the build/reveal videos and the behind the bumpers.
4 Likes
The climb was very achievable with telescoping arms with claws on the end. We used an andymark climber in a box kit that uses constant force springs to push itself up and a rope and winch to pull back in. While it was finicky to assemble, we never had a mechanical failure at competition and could consistently climb the middle bar.
1 Like
2075 didn’t. They haven’t used pneumatics in a while.
3 Likes
our team just used a motor to pop our intake down, we never really brought it back up though
1678 4414 1323 971 973 148 6800 125 2056 4907 3310 are the biggest names with no pneumatics in raid react
1 Like
1197 didn’t use pneumatics in 2023 either. Bit us this year when we needed 'em.
1 Like
Yes I remember several without pneumatics
My team last year (while we included pneumatics for the intake) used a climber without pneumatics which had an… interesting design. Had a massive gear reduction from a CIM that rotated a steel axle with telescoping arms on it. Video explanation here.
1 Like
We did not use pneumatics. The climber was driven by motors. Our intake deployed but did not retract, which probably was a small downside.
1 Like
2075 didnt last year or this year
2 Likes
1771 used no pneumatics last year
Intake was a driven by a neo 550 on a versa planetary into lasercut aluminum gears on a shaft
First climber was aluminum tubing raised by a constant force spring and lowered through a ratchet
Second climbers were simply little arms pivoted through a falcon, versa, and again laser cut aluminum gears on a shaft
The everybot doesn’t appear to have used pneumatics:
1 Like
4050 didn’t use pneumatics. We did use some chunky servos for mechanisms like intake deploy and shooter tilt.
1 Like
I’ll talk with my coach about if and how to share the CAD, but in the offseason we made an intake I call the “drawbridge” that uses elastic to pull it down, and a motor powering a spool to raise and lower the intake (unspool and fall, spool and raise). For climber, I believe at a minimum 2910 had a no pneumatic climb since they climbed off the hood of their shooter and 2 climber in a boxes.