My team and I want to make our robot be able to pick up mobile goals. We have tried arms which have failed badily for us. We went to a competion, we had scrap a lot of our things. We found some insperation from one of the robot from one of our alliance team which was able to lift up mobile goals with there claw and put it on the platform. So does anyone have any ideas of what we can do. Videos would be helpful. The competion that we are partcipating is called tipping point.
Look up a vex 4 bar tutorial on youtube and build that. Then you could mount a claw like 99999v’s on the front of it.
Is there something that does not require pneumatics?
We followed the 4 bar lift but it didn’t work for us. We used it for the arms, what our allience member did was something like a claw and lift that was making it go up like a fork lift.
A cascade lift? I mean you could but I wouldn’t recommend it especially if you can’t get a 4 bar to work. What went wrong with the 4 bar? Also yes you can make a motorized claw instead of using pneumatics.
The four bar lift had probelms like it was bending, to weak, always misaligning, falling apart and many more probelms so we decided for us scrap the idea and think of something else like the claw idea.
I would recommend trying again with a four bar, it’s one the simplest viable design you’re going to get for a lift. Try to increase build quality by using bearing flats, high strength axles and gears, and using nylock nuts instead of kep.
I just disscused it with my team and decided to do the 4 bar lift again. Turns out that we made a custom four bar lift that did not work out very well.
Good luck on getting it to work.
Our claw doesn’t use pneumatics. I don’t know how well you can see this, but our claw worked by one motor and had a little mechanism that was basically some standoffs and lock bars (for the shaft) that were hinged together. We also used a six bar to be able to get mobile goals to the back of the platform.
It wasn’t as strong as pneumatics, but it worked pretty well.
If you look on YouTube Kepler electronics has some great bar lift tutorials
Thanks a lot this is very useful if possible can you give a closer look on the claw area?
Here are a couple. I don’t know if these are much better.
Basically, we got the idea for this claw from another Indiana team named 323V who used a similar claw at the beginning of the season.
If you want another idea for a claw that is powered by a motor, here’s a picture of a Kentucky team named Kodak.
Personally, If I were to make a motor-powered claw, I would do something like DOGO from Harvard-Westlake’s reveal: Harvard-Westlake Robotics: AMOGO x DOGO Reveal. I feel like this claw, while maybe slightly slower, would be much more easy to approach and grab a goal, and maybe a little stronger.
8349K? never heard of them
Thank you appreciate your help
Any other suggestions for the screws or any type of tool since we already use nylock? We are told at teh competation to use some type nuts and screw but didn’t note it down.
No just make sure the screws are long enough to go all the way through the nylocks.