Has anyone made a dr4b lift and had enough space for a ball shooting mechanism? If so could you send a picture of how you did it?
I have to imagine its definitely possible. My team is building a 4 bar, with a flywheel, and our flywheel sits inside the lower half of our gear tower, so if your dr4b doesn’t need any extra space down there, then you should be able to do this. that is, if your 2nd stage doesn’t pass all the way down through the tower.
These guys did it. You can watch the rest of their videos to look at their process and see how they managed to do it.
Hello I am Ethan from 98377F. The first robot we built this year was a flywheel with a DR4B that could reach the top post. If you would like to talk I would be happy to help you. DM me on Instagram at st._cloud_tech_vex there are also pictures on the page of that robot.
You can have the flywheel shoot through the dr4b if your short on space
The key is to save as much space as possible with independent subsystems and a compact lift.
For your dr4b, you want the 4 bars to be as vertical as possible when the lift is collapsed. In other words, the bars on the 4 bar arms should be short enough that they can rotate to a nearly vertical position without hitting the chassis or exceeding the size limit. This is an awesome example of a super compact dr4b.
You do lose some height with this thin a lift, but you only need to extend to 34" for the high posts, so you don’t need anything crazy.
For the flywheel, you want to make sure your conveyor system is totally vertical and that your funnel is space efficient. If you’re having an issue funneling in a small enough area, you might need to make the ball intake thinner to accommodate the spacing issues. Here’s a really clean example of a compact ball funneling system.
I don’t have a picture handy, but if you follow these steps and build well, there shouldn’t be any issues. Good luck!
Lol that’s me! Look at our videos finally being useful. Keep in mind that we needed linear motion sliders (or a small one stage chain lift) up top to score the high posts.
My robot has an RD4B on one side and a (lol single) catapult on the other. There is absolutely enough room for a double catapult, flywheel, or linear puncher where i have my catapult now. The RD4B works fine, although its’ pretty thin. I will attach a horribly blurry picture, but I don’t know how much it will help.
