Lift Questions


#1

I currently have a robot that can externally stack about eleven cones on a mogo. Would it be worth it to change the design in order to be faster and stack the cones internally, but only be able to stack 7 cones?


#2

It would depends on the time you take on stacking 11 cones externally. For example, if you can stack 11 cones on a mogo and put it in the ten point zone in 45 seconds, then that would be the better choice, unless you can stack 7 cones on more mogos faster than you can stack externally.


#3

Are you talking about redesigning your robot between now & Worlds? If that’s the question, the answer is NO. DON’T DO IT. You will not have enough time to be an expert driver on the new design, plus work out all the kinks & bugs that will inevitably appear.


#4

The current eleven cones is extremely slow, and the redesign for the robot will take a week at most


#5

Well then it might be worth it. If you realize you’re pretty much at the ceiling of your current design then you should redesign. Just make sure the rebuild doesn’t end up taking much longer than it should (that was our problem this season, we did a rebuild of some type after each competition)


#6

Do it. Just practice whenever you guys have free time. Get comfy with it and understand it.


#7

100% Disagree. If you have 1-2 hours a day you can put into your robot, definitely do so if it is a major improvement. They don’t call them Worlds rebuilds for nothing.


#8

Famous last words. I did that last year and ended up going with a half finished robot. …not fun


#9

Try using pneumatics on your lift or claw, it will make your stacking very quick. On Youtube, you can find videos of robots like 1970K’s first generation bot that seems to work well as an external stacker.


#10

I would keep your lift. You don’t have the time to build, program, and test your bot in that time. Just practice with your bot


#11

could you post a few pictures so people can give you ideas on what to improve on?


#12

My lift is a four bar that goes into a chain bar. These two are not mechanically linked. The redesign will involve shortening the chain bar, and moving it down. Currently, we have to drop the cone for internal stacking for the first four cones. The new design will allow me to brace the lift better. Also, the program will be the exact same.
IMG_1025.JPG


#13

If you have enough supplies and a large enough team, I recommend breaking into two groups. One group works on improving the old robot and one works on making the new one. Even if you don’t need to rebuild the entire robot, build every new subsystem and test them out. Then simply swap out the two pieces and test. If it works, great! if it doesn’t, you can go back to your old bot which was receiving upgrades anyway.


#14

@The Electrobotz
+1


#15

I’m not sure if I’m correct or not, but is your four bar using compound gearing? That is one of the reasons why the lift is slow imo. If you have spare money, I’d recommend swapping all of the lift to aluminum to ease the stress on the motor. this can allow you to gear the four bar at a more reasonable speed like 1:7 or 1:5. As for the cone dropping issue, you can do that simultaneously with the changes to the four bar as they are separate.


#16

Yeah, I am using compound gearing. While designing this lift, I forgot about the awesome power of rubber bands. I will change the gearing to 1:7 and use better tensioning.


#17

Lots of people talking about if OP has enough time left… really, the number of days does not matter so much as the number of hours. I probably work 7 hours/day 5 days/week but it’s 7 days/week right now on spring break. That’s much different than having 2 meetings in a week, 3 hours each. It makes a huge difference.

Since we only have one team going to Worlds, we are keeping our old bot and making a new one at the same time.


#18

I finished the changes to my lift. It can actually stack 8 cones on the mogo internally, and can stack three on the stationary goal. The lift is now way better