How did you scale?

[KohKohPuffs]

Originally Posted by cad321

An idea we were seriously considering was a mechanism powered by stored energy. The idea was to have 2 gas springs (normally retracted) and have a winch to pull it open. The springs would have enough force between the 2, to lift the bot (~85lbs-100lbs of force each). This would alow us to take advantage of the extra 5 seconds after the buzzer goes to climb. Theoretically giving us an extra 5 seconds of match play.

The biggest reason we left the idea behind was the lead time on the springs. It is very easy to find gas springs that are normally extended, however we had a very tough time finding a supplier with normally retracted springs in the size we needed and that could have them in under 2 weeks (preferably less). I'd love to see this pulled off. Perhaps a good off season project for someone. I heard people talk about this concept, but I don't recall seeing a team actually implement it this year. If anyone knows of a team that did, id love to see it.

I recall talking to 254 about potential climber designs at SVR. They did talk about using two gas springs, which would be retracted and held like that using pancake cylinders. When the pistons were activated, the gas springs would extend, and a winch gearbox would be used to retract the gas springs to pull the robot up. However, looking at their technical binder, it seems they used surgical tubing instead, I guess since it's more cost-efficient than gas springs.

By the way, have you tried mcmcaster.com for finding the gas springs you need? I believe that website has a wide assortment of those in various sizes.