TEAM 701s ARM OF WONDER!
 

CHECK IT OUT GUYS!!!!


http://www.travisusd.k12.ca.us/vande...n/MOV00299.MPG



this is Salik Syed... so don't give a bad rep ... in case i messed up this ain't my profile !

Re: TEAM 701s ARM OF WONDER!
 

http://www.travisusd.k12.ca.us/vande...n/DSC00296.JPG


Yes this sucked to machine lol.... :yikes:

don't worry were getting new spacers

Re: TEAM 701s ARM OF WONDER!
 

That looks really good except when I opened the file the movie played sideways but the arm looked really good and so did your hook, how many tetras are you able to hold and how high does the arm telescope?

Re: TEAM 701s ARM OF WONDER!
 

That picture is really big. Can you edit your post to just link to it instead? In the video, the arm looks very good though. (however I broke my neck to see it oriented correctly :D )

Re: TEAM 701s ARM OF WONDER!
 

I put a link for the pic....

The arms full reach is like 12 feet muwahahahaha

Re: TEAM 701s ARM OF WONDER!
 

That's pretty darned cool. We don't have an arm design yet. Sure we have ideas, but nothing designed. Let alone built, lol.

Is the telescope pneumatic powered or what?
And is that two FP motors I see powering the elbow? Interesting...

Re: TEAM 701s ARM OF WONDER!
 

Question: How does that grabber grab tetras? It actually looks like it would be pretty good for the bar from last year (no insult implied). Is there more to the grabber than what we see, or is it still in design?

By the way, I like the custom made giant linear bearing.

-Tony K

Re: TEAM 701s ARM OF WONDER!
 

that looks excellent! I'm glad I viewed it on a laptop where I could just rotate the monitor. is that powered with pneumatics or a motor?

Re: TEAM 701s ARM OF WONDER!
 

The telescoping is powered by a van door motor.... and there is more to the claw than you can see....


EDIT:

thanks for all the replies... with the hook in the pic we can grab 1-2 tetras at a time but probably just one at a time because stacking them on the ground then picking them up together takes just as long as just stacking them one after the toher

Thanks for the comments on the linear bearing it was a pain to machine (me and the user named Alekat made it) because TECHNICALLY we had a tolerance of 0" however the 2" box is actually 1.997" and the .875 bearings are actualy .874 so that gave us some leeway
You should see this thing in action it is SCARY SCARY how silent it is !!! its like some kind of monster raising its arm from behind you hehehe... like in the movies silent but deadly...

Re: TEAM 701s ARM OF WONDER!
 

very cool guys. looks pretty sweet. so how many tetras are you holding?

good job though keep up the good work

Re: TEAM 701s ARM OF WONDER!
 

oh yeah the arm is not gonna be really powered by FP w/ the plastic trannys (those are back ups ) ... we've got a sweet custom tranny ... i'm actually putting it together as i type this.... 250:1 reduction.... it was designed and machined and built in 2 days!

Re: TEAM 701s ARM OF WONDER!
 

Thats one big arm, very cool. It seems faily quick as well. Nice

Rob

Re: TEAM 701s ARM OF WONDER!
 

Here's some links to the "two-day" dual FP transmission. We got a small Benchtop CNC mill in the Fall and after learning the ins and outs of CNC (and MasterCAM), this is it's first real result. Here's some links to a few pics (I would attach them, but for some reason I'm not allowed to use attachments anymore, just as well)

Dual FP Transmission, 260:1

Another pic of our arm transmission

Can you stack tetras like this?

Really tall reach, this might be a bit of overkill!!

Re: TEAM 701s ARM OF WONDER!
 

I'm not sure about the speed, and do you guys have a joint at the base?? We had a base joint last year powered by a screw drive, its really sweet and pretty much indestructable (watch for bends though...) All in all, a good design. Props!

Re: TEAM 701s ARM OF WONDER!
 

Ok chap, the stuff is good but really not awesome. You kinda wasting your time........... i mean look at the real scenario man, the game is divided between 15 seconds and 2 minutes,and you're arm took almost 10 seconds to open up. Wiith the details in the video, i can guess that it will take apprx. 40-45 sec or may be more time to pick and put the tetris on the top. So i can say that within the time limit of 2 minutes the robot will be able to put nearly 2 tetris on the goal.
This mechanism can't be offensive, but can be defensive. Think about it......

Madi
------------------------
"Think in terms of what you can think by not thinking what you can't think, but you can also think about the fact that you are thinking about something which somebody has already thought off." :cool:

Re: TEAM 701s ARM OF WONDER!
 

Where can I find the mechanism you've shared with the community that does better? I tried the search function.

Re: TEAM 701s ARM OF WONDER!
 

[quote=CRAZYMADI]Ok chap, the stuff is good but really not awesome. You kinda wasting your time........... i mean look at the real scenario man, the game is divided between 15 seconds and 2 minutes,and you're arm took almost 10 seconds to open up. Wiith the details in the video, i can guess that it will take apprx. 40-45 sec or may be more time to pick and put the tetris on the top. So i can say that within the time limit of 2 minutes the robot will be able to put nearly 2 tetris on the goal.
This mechanism can't be offensive, but can be defensive. Think about it......

Madi
[quote]

We're not saying it's the best thing out there, we're just celebrating the fact we made it - we haven't always enjoyed this level of success with our "mechanisms". Also it only really needs to telescope when capping the center goal. And whose to say it can't go faster?

Re: TEAM 701s ARM OF WONDER!
 

I thought that if you were going to criticize it was supposed to be constructive criticism. That wasnt. In order to make this criticism of your unconstructive criticism constructive I hereby propose that next time before you criticize you think how you would have done it better, then make a point of explaining your better idea.

As far as the arm goes I like it. I wish we could do something like that. I have got to get a picture of our collection of precision tools. It consists of sawzalls and grinders. Great job on the arm!

Re: TEAM 701s ARM OF WONDER!
 

10 seconds yes... but the sppol diam is appx 1" right now... we can up it to appx 8" diameter w/ sufficient torque ..... and it will come up quite a bit faster....! the 1 " spool is for testing we had it made for a proto van door winch from 2004 so we used that....

it seems overkill in the pic but thats before we cut down the arm to FIT in the requiremnts :D

thanks for the comments .... i think the true judge will probably be competition.... you may be right you may not be... we'll see LOL..... but do remember this is kinda in the prototyping stage... the real one might go up faster and have a stronger elbow etc...

Re: TEAM 701s ARM OF WONDER!
 

10 seconds is not entirely bad. One thing to remember is that when you reduce our reduction for your motor to run faster, you are also increasing the load on the motor and it will get "bogged down" more. For our (pivoting) arm, we estimate an actuation time of 16 degrees per second.

Re: TEAM 701s ARM OF WONDER!
 

That's a really nifty arm. Can you explain how that claw works? It's a little hard to see. Also, at the end of the movie, I hear a voice say, "Put a tetra in there, and see how well it goes up." How much does that extra load affect the speed of telescoping?

Oh, and to anyone tempted to make posts like CRAZYMADI's, be sure to read the wise words of Andy Baker:
http://www.chiefdelphi.com/forums/sh...ad.php?t=25464

Re: TEAM 701s ARM OF WONDER!
 

Hi... with the tetra it goes up same speed.(the reduction is overkill so theres no change in speed w/ the tetra) .. i understand about draw going up w/ less reduction... however we are only pulling 2 amps so i guess a 3-4 " spool is quite possible

i relooked at the video... the whole grabber is in there... (there nothing more to it)
basically theres a upper claw and a lower retracting bayonet that allows the tetra to fall down quickly

Re: TEAM 701s ARM OF WONDER!
 

How does it telescope? Leadscrew? This is goign to be a GREAT robot!!

Btw i can't get the other links to work. I really want ot see them

Re: TEAM 701s ARM OF WONDER!
 

uhhh... dude none of your links work.

Re: TEAM 701s ARM OF WONDER!
 

Cool video, i too watched it on a laptop and turned it sideways. Looks like it will be promising in matches. Good luck with the rest of your build

Re: TEAM 701s ARM OF WONDER!
 

well, i received a lot of comments about my reply.
I was just trying to highlight the actual scenario.
I really did appreciate the efforts of team 701 and their designing abilities.
If anybody feel bad about it, then i'm really sorry for that.
I'm taking my words back. Sorry once again

Re: TEAM 701s ARM OF WONDER!
 

The other links are connected to Doug G 's yahoo brief case.. you should be able to click the picture icon in the middle of the page.. ... however heres a site with more pics:

http://www.travisusd.k12.ca.us/vande...5%20Season.htm

no offense taken... i kno how it is.... no hurt feelings or anything ;)

Re: TEAM 701s ARM OF WONDER!
 

Re: TEAM 701s ARM OF WONDER!
 

As far as concerns go on the number of tetras being held by an arm. A few of us agreed on kickoff it just was just better strategy to do one tetra at a time, fast and efficient. Not only do you avoid spilling all your eggs, but isn't that precisely what autonomous calls for?

Re: TEAM 701s ARM OF WONDER!
 

Yes ... the telescoping is only used for capping the tall goal... we can cap all other goals w/o telescoping... and as alex stated our strategy is quick simple capping