Which one is better to do, a DR4B or a chain bar mounted on a four bar? I have attempted both before.
Personally I think DR4B is and will be superior. It has much higher stacking capabilities, and if done right, can have the same cycling time of a 4-C-Bar. DR4Bs can also stack high enough to get all the preloads on one stack.
DR4B is superior, we had to run a cb on a 4b due to time once and it didn’t perform half as well as our current DR4B.
Oh yeah sure. You attempted a chain bar on a four bar mhmmmmm.
Just kidding. I personally think a DR4B is significantly superior or to a chain bar on a four bar (dr6b still is best tho). Espicially because of the faster stacking and just naturally superior height.
We need @Zach929Y in here, he’ll tell you.
As @Nemesis stated, a DR4B will be superior compared to the four bar and chain bar format. Not only will the lift stay linear, but the stack height will be increased when a form of four bar or chain bar is added to the end. Adding the said four bar or chain bar will also give you the option to internally stack assuming the lift is tuned correctly and the cones can reach the mobile goal comfortably.
Now, considering that matches don’t usually exceed more than 6-7 cones per mobile goal for middle school comps in GA (at least from what I’ve heard), it would make sense to build a four bar with a chain bar attachment. This can keep you competitive and will be easier to build than a DR4B with an internally stacking mechanism. However, no one knows your robot any better than you, so it depends on your team’s decision on your lift type.
(hope you make it to states!)
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so this whole time i thought you meant “DR4B on top of a 4bar” or “chain bar on top of a 4bar”
In all honesty though, do a Four bar on top of a DR4B. Then you can stack internally.
This works very well.
You can stack internally with a CB on a DR4B too. I think it’s just a matter of personal preference. I have seen good teams that do it different ways and are still about the same level of skill
wait, it’s the other way around?
but i already asked this 9 days before OP
Yeah I feel like there’s a ton of reposts on this forum. If only there was a way for admins to somehow merge threads
Actually, I have a scissor lift with a chain bar on top, and it’s close to pigpen speed.
Was it one of the chinese ones? I heard the chinese teams are really good at scissor lifts. Also do you have a video? Of the scissor lift or Pigpen? I keep hearing of Pigpen, but who, or what is it?
This is what I meant by chain bar on four bar: 929U Vex In The Zone - New robot stacking - YouTube
They aren’t the same, but I will say I drew inspiration from their design. However, the only inherent similarity between my robot and theirs is the scissor lift. I have a chain bar on top, while they have a four bar. My mobile goal intake is designed very differently than theirs as well.
Anyway, I finished the robot the other day, and have been practicing driving it. I only have 6 cones and a mobile goal to practice with, but it can get all 6 cones in 20 or so seconds.
Yeah, I had to find that earlier, and I see what a good idea it is, but I just didn’t know why you’d want a DR4B on top of a four bar. I understand what you meant now, thanks for clarification.
Dr6B is not better 
But anyways I can tell you that dr4b 4b or dr4b CB is the better option for the game and cycle times, but for a simple design that is effective 4B CB is not a bad option. infact 86868R has been using a similar design for a while and has been destroying in california. Just goes to show a consistent design is better then a super fast but not consistent one.