We need help making a double hook climber, does anyone have any suggestions and or videos or links to help?
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Why 2 when you can simplify to one?
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The reason we are thinking about using two hooks is because we are afraid that are robot isn’t sturdy enough and might break.
I posted a somewhat similar thread earlier, so I will attach it here.
(Disregard all of the discussions regarding my team’s drama, LOL…)
Thanks!
You want one on each side?
The key problem is just getting a hook up there. Once it’s there, pull down on a string wrapped around a shaft, connected to a gear box that’s geared appropriately. Use a ratcheting wrench to keep it from going backwards.
How is another question and depends, at least in part, on how tall your robot is. Drawer slides are effectively elevators minus the rigging. A 26" full-extension drawer slide, the top of which is normally at 45", can deliver a hook. Put a pulley at the top, connect it to bottom of the final stage, and then use a motor to pull it up. Make sure the hook disconnects from the drawer slide – they don’t do well with lateral forces.
Yes we want one on each side mainly for stability. Our Robot is 34 1/2 inches tall.
Packaging is everything. You can do 2 nested bars, or 2 rotating arm joints, scissor lift type thing.
Just take a look at some teams and how they do it. 1114 has 2 hooks, 148 and 118 do too (all nested bars). We have 2 rotating arms, same with 188. etc etc.
Ok, we are wanting to do a nested bar
Two hooks gives you better ability to balance the switch - and redundancy.
I love the ideas in this thread, and most have said what I would say, But my one piece of advice is don’t do a climber that deploys a hook then winches up. I’ve talking to multiple teams who have hated their design and are switching to a different one. Are you okay with making your robot 45 in tall to simplify your climber design?? The trade off with making your bot that tall is that your COG is way up there, but now you only need a one stage elevator to get up.
Good advice, unless the game calls for it , like Stronghold . The recent ones don’t need a hook winch. Unless you are space constrained.
The reason: Time to score more, less fouls, reliability , consistency and scout notes. One thing a scout looks for is predictability and who they can work with to get it done (90 points). Our fast robust reliable hang last week put us a a sure pick by both captains 5 and 4… the others likely knew we would be chosen before they could grab us.
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Redundancy maybe, better ability to balance the switch, not at all. You give yourself fewer options for where to place yourself as your bar footprint is larger.
We did the Everybot climber, hideously far off of our center of gravity, and just one side - it bent the PVC a lot but it was fine. The PVC isn’t really taking much of the load - it mostly exists to “push the rope” up.
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Depends on the design. We’re using two hooks on linear actuators, and by retracting one more than the other we can shift our weight distribution between the two. We can pull our weight entirely on to one hook if necessary.
Cad files here
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