Wondering if anyone can share how they climb, especially teams that hang via a rope mechanism. How do you deploy your climber, and how do you pull yourselves up the rope/string. Thanks.
We overbuilt our elevator so that it can lift cubes and climb.
Our team used two doublesolenoids to a 3"x36" air cylinder, with a 3/8" u-bolt for a hook. Worked amazingly well and reliably.
We deploy our hook with a telescoping tube with pneumatic cylinder inside (about 3’ long, tiny in diameter). Gets the hook on there, then we retract, leaving the hook on the bar with a strap attached to it. We winch the strap to climb.
We have a spring loaded hook, which is made of PVC pipe sliding in another PVC pipe. It is sprung by a piece of latex tube, and is released by a small pneumatic cylinder. The hook has a thin rope attached to it, which is winched down (to raise the robot), by a CIM driving through a 64:1 BaneBots gearbox. The winch drum is a pretty simple piece of aluminum that looks like a V belt pulley.
Not tested in competition yet…but it worked at home…we’ll find out next week.
This is a great solution if you folks built an elevator.
On the back, top of our cube lift we have a bar that holds our hooks.
They are magnetically attached to a holding plate using a few small rare earth magnets and a small plate of steel sheet-metal attached to our aluminum hooks. We drop our hooks onto the bar and they slide up and are released onto the bar. We then winch our robot up during the last 4 seconds of the match to ensure we are above the line as needed to get the climb points. We had some issues with our hooks coming off when we didn’t want them to at first, but we fixed that issue…with a simple zip tie in the right place. LOL
Here’s a video of our climb in one of our last matches at our first district event.
Have there been any climbs where two robots independently hooked the rung and both got the climb bonus?
If so, I haven’t seen it. It’s either been one robot getting the climb, or a robot has ramps/forklift, etc. to raise itself and one or two others.
We built ours with a pneumatically-driven swingarm that deploys a hook. The plan was that we could strafe out of the way to leave room for a second robot to hook, then coordinate the climbing. That was our plan anyway… haven’t competed yet.
Ours can do that same thing. We just haven’t had anyone who built a low profile climber to climb next to yet…at least when our climber started working.
I show 2 hooks in our photo, but we actually only need to hook on with one, for everything to work.
We put our hook on a corner of our robot, to allow room for another robot to hook on at the same time. Which is probably not likely to happen often, if at all.
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We have a lightweight arm off the back of our robot with a hook on it. The winch to pull it back down is a PTO from our drivetrain.
@mobius911 in qual 63 at Montreal my team almost did it but our robot (4952) could’nt climb more so 6902 went high enough for a second but they didn’t kept that high so we didn’t got the ranking point. And our robot got too high so our hook got stuck on the bar and we had to cut the rope after 5 minutes trying to take him down.
Thanks for posting. Just watched the match. You guys were so close to getting it! Great example of how it can work.
Love the French/English announcing as well!
1339 and 3230 pulled this off in Qual 48 at Utah in Week 1. 3230 has a detachable hook on a cable that allows them to hook the rung and then back away to allow a “front-approach climber” to grab the rung. These 2 teams then perfectly coordinated their climbs so that neither got hung up under the other! Excellent work for sure!
I’m guessing we’ll continue to see more of this as teams get more chances to see how it can be done.
Double climb at Great Northern Regional.
We have a carbon fiber support system for the hooks off the rear of our elevator. We 3d printed a few snapping brackets for positioning in the match, and we have it driven off a winch in the center of the drivetrain.
Not a rope, but a single-stage elevator with the top of the hook starting more than 54" off the carpet. We compress a 175" air spring the last 15+" of the way up so the climb is actually free. We hope to use our motor on the pull down to lift a buddy.
One CIM, in a TB-micro at 12.75:1, further reduced 22:16 in chain, then climbing with two #25 chains on 16t sprockets (pitch diameter 1.29").
Here is one.
Here is a working buddy bar match. It worked twice I think.
Here is the cad file. A bit incomplete. The chains, climb hook and for some reason the wheels are missing.
That is 4 775 pros at the bottom of the elevator. The motors have enough power to triple climb in less than 2 seconds. But we hit the weight limit and there is not any good reason to triple climb so we only put on one buddy climb platform for double climbing. It can do that in less than 1 second.
The carriage runs double speed from the climb. Carraige goes bottom to top in a bit over 2 seconds.
I don’t have any good pictures of it done because we had a snow day on stop build day.
Our climber is just a large hook on our intake that moves with the elevator stages. Simple and effective