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pic: 2791 Starting Configuration
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That's a really neat idea!
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No idea where that came from, nope...
We stepped up the PVC tube diameter for a bit more rigidity than your system. It's paid off pretty well! Now that I think about it, our robots are dramatically similar this year... |
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How do you hold an ubertube for auton?
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I expect they'll have to pick it up off the floor. Probably requires a bit of forward/backward driving to get it.
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Did you guys have something really cool in your base or was that guy just admiring your work?
Anyway, the bot looks awesome - get those guys some practice and it'll do great. |
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We don't have much time for practice, but luckily we have a veteran driver waiting to get his hands on the bot. |
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Chris,
Great robot, did you guys not have weight for an aluminum arm? -RC |
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We bought very large (2.5" outer stage) PVC to ensure there'd be some rigidity in the arm. |
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We have enough rigidity with a 2" outer arm and 1.5" inner. It wiggles, but that's not a problem. Using ABS lets us have less weight and a more robust arm, but as you noticed the only 2.5" you can find easily is gray electrical conduit.
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Current plan is to put tube on ground touching bumper. Back up, extend arm, open gripper, drive into tube, close gripper, proceed with auton. |
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might want to add "push tube forward" in there somewhere
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Team 3735 is earliy similar to this but our system is a little more sturdy i think. We used 1" aluminum inside of 1.5" aluminum and instead of gravity for extension we rigged up a 1.5" bore pneumatic piston. Being able to retract the arm during the game makes driving around and placing tubes on the rack much easier.
I'm very jealous and curious of your 7 victor controlers on your electronics board. 4 are probably for the CIM motors on your drivetrain but what are the other three used for other than controling the arm? |
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Looks really awesome though, 2791! You guys just keep getting better ;) |
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I'm really proud of the extra mile we went to make a modular, removable electronics board this year. Every single plug is hooked up to an Anderson connector. Just one "click" and we're wired up. |
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Ha ha ha, you weren't lying Chris when you mentioned that our bots look similar! Great job on the robot Chris and looking forward to seeing it in action. Oh btw, we changed the way our bot looks :P
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It looks like your radio is plugged into the camera power supply.
Make sure that gets fixed before competitions. |
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How did I not see this thread before?:confused:
Thursday at WPI will be interesting with this bot Chris. Making any changes? btw awesome song choice. |
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Luckily, we are not rebuilding this entire robot this time. We withheld our claw and reinforced major parts of it to ensure that it stays in full working order. We will hopefully have a minibot deployment system perfected which should allow us to deploy "instantly" onto the pole like 148 does. (If not, we have a backup plan) We will be bringing a minibot "Plan A" and "Plan B" to the event. The first is a 3 second, 100% student designed and built machine that is not the fastest but is extremely reliable. The second is a 1.4 second wonder that might just explode. Our electronics board is completely modular (inspired by 571) and was removed for making a dummy autonomous mode. We will have to take quite a long time to calibrate it as we have far less sensors than we need, but we will make it score in autonomous, somehow. We also have plans to redo the belting in the drivetrain for a more stable, redundant system rather than the single belt loop we have running, but that depends on whether or not we can get a replacement hex broach in time. |
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One positive this weekend: We weighed this robot, with a claw made of round 1/8" wall aluminium instead of the wood used here, along with a few other weight increasing parts.
The robot weighed only 100 pounds. 20 pounds under, and everything on this bot is 1/8" wall. Minimalism is beautiful. One thing that turned out to be no problem was arm retraction. We took a full speed hit to the end of the arm without a scratch. The PVC's give was perfect for this. All we had to do was drive with the arm up in the air to score, and with our freakishly low CG it was very easy to do. We had a lot of bad luck at WPI, but at least some of the cool stuff worked the way we wanted it to. |
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