pic: Lift this [Archive]

FunkyRatDemon

20-02-2007, 17:00

What are you using to lift others? We originally were using carbon-Fiber panels, however ours were going to make our bot' to heavy last momnet and we had to ditch them (our forklift is great though)

Greg Needel

20-02-2007, 17:11

can you lift if you only have 1 robot on your platforms?

Wayne Doenges

20-02-2007, 17:22

can you lift if you only have 1 robot on your platforms?
Yes we can, go to the 'Robot Showcase' and see the Youtube videos. It's under 'Team THRUST (1501) 2007 robot

s_forbes

20-02-2007, 18:50

Awesome frame! Is it made of steel by any chance?

Wayne Doenges

20-02-2007, 20:34

The whole frame is welded chrome moly tubing. Very strong and very light.
We are using two monocoqued wings. The wings are 17 pounds each and will easily support 200+ pounds with very little flex.

roboticsguy1988

21-02-2007, 01:10

The whole frame is welded chrome moly. Very strong and very light.
We are using two monocoqued wings. The wings are 17 pounds each and will easily support 200+ pounds with very little flex.

Correction that is 300+...

Curt Henderson

21-02-2007, 05:24

http://www.youtube.com/watch?v=rrpb4zFe3j0

It's not one robot but, well you'll see the point.

Stu Bloom

21-02-2007, 12:35

The whole frame is welded chrome moly tubing. Very strong and very light.
We are using two monocoqued wings. The wings are 17 pounds each and will easily support 200+ pounds with very little flex.I assume the tubing is donated ... but what are you claiming for its value. That stuff aint cheap!!

waiakea11

21-02-2007, 12:38

lol looks cool....do the two guys wiegh up to the same ammount as a bot? or did you guys just do that for fun?

cooker52

21-02-2007, 13:33

They wiehg more and we did pretty much do that for fun.

GIR

21-02-2007, 13:41

That's some very slick engineering folks. Huge kudos to your team!

FunkyRatDemon

21-02-2007, 13:49

You think that stuffs expensive...we have Carbon Fiber panels! (2 of, and quadruple layered at 1 x 1 yard each)
and were not using them!

Adela

21-02-2007, 14:04

oh my WOW, thats amazing.
any chance you'd explain to me how it works?

d.courtney

21-02-2007, 14:30

You think that stuffs expensive...we have Carbon Fiber panels! (2 of, and quadruple layered at 1 x 1 yard each)
and were not using them!

That isn't expensive at all if you make it yourself, we made some carbon fiber peices for our manipulator (as to make it more durable) and it wasn't that costly.

Chris_Elston

21-02-2007, 14:37

I assume the tubing is donated ... but what are you claiming for its value. That stuff aint cheap!!

Hey Stu!

Actually it wasn't that bad. I don't have the price total in front of me but you can pick it up at your local aircraft supply store :rolleyes: It's the same stuff they make landing gears out of on air planes. Helps to have a mentor who has made his own custom airplanes before...lol....

cooker52

21-02-2007, 15:19

The wings(a.k.a. the ramps) will start folded up next to the main structure. When it comes to the end of the game, we will release these latches that will drop the wings and allow robots to climb on. When they are ready, we will lift the wings and robots with a couple of air cylinders. We have tried lift our two robots from the last two years and it works almost flaulesly.

Wayne Doenges

21-02-2007, 15:23

lol looks cool....do the two guys wiegh up to the same ammount as a bot? or did you guys just do that for fun?
The mentor on the right weighs 190 pounds and the student weighs 160 ish.
We can lift two max weight robots to a height of 12" in 4 seconds :ahh:
We use two, 12" stroke, cylinders and two, 100 pound rated, gas struts.

pakratt1991

21-02-2007, 22:36

Looks like a nice lifting system there :D

Just wondering how is your drive train?
Does it give you the power to push and play defense durring the normal game time?
because of the way it looks, It seems that you only have 2 of the stock wheels that first gives you.

hotcamguru1005

21-02-2007, 22:43

looks cool, you will be an envied alliance member for those who cannot lift or are less than good at lifting

waiakea2024

21-02-2007, 22:49

nice very nice. i wonder if we can lift people. depending on how heavy they are we should be able to

Wayne Doenges

22-02-2007, 07:07

Just wondering how is your drive train?
Does it give you the power to push and play defense durring the normal game time?
because of the way it looks, It seems that you only have 2 of the stock wheels that first gives you.
The new FIRST wheels are very sticky so we should be able to hold our own in pushing. With only two wheels we have the entire weight of our bot on a very small footprint.

Stvn

22-02-2007, 21:07

A reliable Robot for the rampless. The envy of everyone.:cool:

conacher

24-02-2007, 11:46

wow. that robot is strong. you guys are going to get a lot of points at the end. i'd love to be on your team.

Curt Henderson

24-02-2007, 21:48

The guy in the dark sweatshirt is Mike our design master mind. It was his concept and vision that the rest of us rallied behind to create this years robot frame and lifting trolley. With the help of his dad Jerry leading the wing design, we were able to build a robot that we feel will provide a solid contribution in our alliances point totals.

Wayne Doenges

03-03-2007, 07:26

With the help of his dad Jerry leading the wing design, we were able to build a robot that we feel will provide a solid contribution in our alliances point totals.
The prototype wing was able to support 300 pounds while being rotated to a lifting position using just one support as a lifting point. It had MAYBE .5" of flex.
If you can get on the ramps, we CAN lift you.

Rich Ross

03-03-2007, 20:30

Nice. Especially after seeing countless robot who can't climb ramps, this appears to be a good design. I just hope your partners are willing to head back early enough for you to make it all the way up.

roboticsguy1988

03-03-2007, 21:46

You know it was hard to imagine when we started doing Monocoque (which comes from airplanes, because they are made the same way), that we would someday have a robot with wings, i mean seriously a monocoque robot with wings how ironic.

pakratt1991

04-03-2007, 01:18

Hey guys,
I just saw an interesting idea that was used against team 488 at PWN that i though I might clue you in on,
Due to the lack of pushing power in both your robot and team 488, there was nothing they could do if they were trapped on one side of the field, this forced them not to lift any robots while letting the opposing alliance was able to get one up and have the other block 488 at 1/2 court....

hope you guys have thought about this and worked around it...

-team 997
2007 PNW regional champs

pakratt1991

04-03-2007, 02:57

Madison

04-03-2007, 06:58

I also had a question bout your gas struts.
this is the same system that team 488 used and in the final rounds they were not able to recharge all of their system in such a short time... have you solved this?
I do not completely understand the gas struts my self so this might be a dumb question, I am going to go look them up now.

This isn't true. There is no 'recharging' necessary with the system we have in place and any trouble you may have perceived during the elimination rounds had nothing to do with our gas springs or lifting mechanisms -- both were working fine throughout.

The only required action to prepare our robot for the next matches was a reset of the mechanisms that restrain the gas springs -- this system is completely independent of the lifting action itself. I'm not sure if I understand how you might've thought that our systems weren't functioning properly, but I'd love the opportunity to answer any questions you may have so as to fill in the gaps in your understanding of the mechanisms.

Wayne Doenges

04-03-2007, 07:07

The gas struts, on our bot, at the start of the match, are in compression . When triggered, the gas struts assist the pneumatic cylinders in the lifting. Gas struts don't need recharging. Look at any van lift gate and you will see two gas struts.
Our whole lift/wings are a one shot deal. Don't get me wrong, we can raise and lower our wings but we only plan on lifting only once during the end game.
I just viewed Team 488's robot. They are nothing like us. Our two pneumatic cylinders and two gas struts are centrally mounted to our tower at one end and to a trolley at the other. Our Wings are attached to a trolley. When triggered, we lift the trolley/wings. 90% of our robot is lifted.

there was nothing they could do if they were trapped on one side of the field
We don't plan on putting ourselves in that position but thanks for the heads-up.

pakratt1991

04-03-2007, 13:39

Madison

04-03-2007, 17:19

I'm glad that you have though of this before...

and I dont know how I came to the conclusion that it needed to be recharged, I guess it was resetting the spring... Too many assumptions, thanks for the info ;)

No worries. I can understand how some might think that we're having trouble with our robot if they don't know exactly how it's designed to work. A few folks on my team pointed out that folks in the stands thought we'd been badly broken when we took our robot off the field in three pieces after our first match. It's designed to come apart very easily, of course.

pakratt1991

04-03-2007, 21:35

yeah I noticed the pegs, that was a really nice design feature, probably made it easy to repair.

ditch64

08-03-2007, 22:36

Curt Henderson

09-03-2007, 05:25

so from the looks of it, this is a dedicated ramp bot, correct? so you deploy at the beginning of the match id assume and just wait? would suck if there were more then one ramp bot on your team... btw AMAZING design!!!

Our bot is a dedicated "Lifter Bot" and our strategy is for the first 1:45 min is to make as much defensive noise for our opponents as possible to limit their capacity to score, we will then return to our home zone, deploy our "Wings", let our partners drive on and then execute our lift for the 60 bonus points. We can deploy and lift in 5 secs., but if need be, we can continue to raise after the power has been cut at the match end as long as we initiate the lift while power is still available.

ChrisMcK2186

09-03-2007, 07:47

A team had one almost exactly like that at VCU regional last weekend. It looked fantastic but several bots had problems climbing on to it in exactly the right positioning to avoid the topple, expecially ours:D . I could be because our back wheels hung over behind it and that didnt lend itslef to good balance.

Chris

Wayne Doenges

09-03-2007, 09:45

It looked fantastic but several bots had problems climbing on to it in exactly the right positioning to avoid the topple, expecially ours
Not to worry. We plan on putting 'Sharks Teeth' on our wings. They will function the same way they do at parking lots. You know the ones I'm talking about? You can drive in, but if you try to leave through the entrance they stand up and blow your tires.
We will add pieces of lexan that will bend as you go onto our wings but will catch on your undercarriage and stop you from rolling off without blowing your tires :D

Curt Henderson

09-03-2007, 12:07

To add to Wayne's post further, we also have outriggers that get deployed and automatically latch when the Wings are let down. These outriggers move our pivot point out the the center of the Wings. This will make our robot virtually untippable during our lift phase.