Fastest Possible Canburglar

[Jay Meldrum]

Originally Posted by ScourgeDragon

Yup! We implemented just one side (2 cans) due to the tremendous torque on the system with the circular aluminum tubing we could source before worlds.

Sadly I never saw you guys testing this, do you guys mind posting a picture?

Great playing with you on Carson... we should have had it

[Jean Tenca]

Originally Posted by Jay Meldrum

Sadly I never saw you guys testing this, do you guys mind posting a picture?

Great playing with you on Carson... we should have had it

In the rush of things I'm afraid we didn't take any pictures. Once we get our pit and crate back we can take some pictures and video to show everyone!

[Karthik]

Originally Posted by JesseK

I heard a rumor that Karthik mentioned de-ionized water and freezing motors in his Wednesday talk w.r.t. speeding up canburglars. Can anyone explain how this helps and what the process of it is? I vaguely remember something from the Minibot days as well, but it's a bit fuzzy.

I actually mentioned it with respect to people trying to speed up minibots. However, I would not be surprised if teams tried this for Canburglars this season.

[GeeTwo]

Originally Posted by Bennett548

You can get slightly faster times if the gear ratio is not constant. A linkage or, non-round pulley or sprocket set can accomplish this.

Last year, I worked up a linkage-based design for this purpose to power a yoga-ball catapult with motors. We didn't use it, but I recreated it and posted a spreadsheet describing it recently on the "Launch Unusual Items" thread . I also did a cardiod pulley based design, but that's probably not too useful in this context, as you want to be able to pull the arm back up later in the match.


And yes, springs can be much faster, but making them both safe and reliable is probably beyond most teams' capabilities.

[GeeTwo]

Originally Posted by Karthik

I actually mentioned it with respect to people trying to speed up minibots. However, I would not be surprised if teams tried this for Canburglars this season.

Just curious - with the minibots, I haven't dug for it, but none of the descriptions I've seen of the minibot tricks involved raising the volume of the minibot faster than its center of gravity. It seems to me that the main part of the minibot could be (for example) half the maximum height, standing on lightweight pass-through stilts that put it at the maximum height. This would put the CoG at about 70% of the minibot height. Then, as the minibot climbs, the stilts are lifted relative to the COG (probably geared right into the same motor) until, at the end, the main part of the minibot is occupying the bottom half of the volume, so the CoG is at 30% of the minibot height. By decreasing the amount of work to be done, you should be able to execute faster.