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-   -   pic: Our spine (http://www.chiefdelphi.com/forums/showthread.php?t=54558)

Darkforces 19-02-2007 14:29

pic: Our spine
 

s_forbes 19-02-2007 14:31

Re: pic: Our spine
 
So that's what you guys were up to! Very clever! What are you using to drive your spine and how easy is it to contol? I would expect it to bounce around quite a bit, especially with a tube on the end.

Elgin Clock 19-02-2007 14:41

Re: pic: Our spine
 
What is that, and what the heck is it's purpose?

Darkforces 19-02-2007 14:44

Re: pic: Our spine
 
To control it were using two motors and a pully system, to keep it from bouncing around we have tensioners at the end, ill be posting the finished product soon.

Greg Perkins 19-02-2007 14:45

Re: pic: Our spine
 
It's their manipulator...

If I'm guessing right, you have 4 cables attached to the end, and by applying/releasing tension in the opposing cables you can theoretically move the "spine" anywhere like a turret and bend like a joing with simplicity. Amazing, this should win an award if it's functionality is good.

Love the bot guys.

Nate Laverdure 19-02-2007 19:32

Re: pic: Our spine
 
Impressive-- will it have some sort of manipulator on the end?

Darkforces 19-02-2007 20:30

Re: pic: Our spine
 
Yes there will be an active manipulator on the end.

JoeXIII'007 19-02-2007 21:24

Re: pic: Our spine
 
I'm scared, it looks like a scorpion... does it bite??? :D

Kim Masi 19-02-2007 21:43

Re: pic: Our spine
 
Very neat, but does that exceed the 72" limit?

Darkforces 19-02-2007 22:10

Re: pic: Our spine
 
Its close but still within the 72'' limit

Elgin Clock 19-02-2007 23:29

Re: pic: Our spine
 
I honestly can say uh.. I don't get it. lol :o
Sorry.
I'll have to see this bad boy in person.
What regionals are you headed to?
Atlanta as well?

Darkforces 20-02-2007 07:22

Re: pic: Our spine
 
Were going to the Florida regional and Atlanta. Ill have video of it posted soon though.

Gabe Salas Jr. 20-02-2007 08:44

Re: pic: Our spine
 
Quote:

Originally Posted by Darkforces
Yes there will be an active manipulator on the end.

So you guys are going for the gusto by adding the manipulator to the arm since I talked to you on Friday. That is awesome.

I cannot wait to see the video.:D

Swampdude 20-02-2007 09:09

Re: pic: Our spine
 
That is one of the coolest ideas I've seen so far in first. APPLAUSE for this inventor!
I have got to make one of these, it looks like a blast!
If I were you I'd wrap that thing with a cylinder of thin plastic sheet, to keep the cables from getting caught on stuff and pulled around. Now I'm excited to see this at UCF. Good job guys!

Brandon Holley 20-02-2007 09:42

Re: pic: Our spine
 
wow, what an awesome idea...post video soon!

Qbranch 20-02-2007 10:05

Re: pic: Our spine
 
Very Innovative... It will be interesting to see how it functions! :yikes:

Can you tell what that material is you used for the spine's core?

What regionals are you guys going to?

I usually don't ask two questions in a row?

-q

Darkforces 20-02-2007 10:22

Re: pic: Our spine
 
We do cover it so the cables dont get tangle up with anything, its made out of a fiberglass antenna for a boat, its very strong and flexable, and were going to the florida regional.

bear24rw 20-02-2007 18:37

Re: pic: Our spine
 
Thats awsome

Do you have a video of it yet?

Cody Carey 20-02-2007 18:44

Re: pic: Our spine
 
Quote:

Originally Posted by Elgin Clock (Post 582108)
I honestly can say uh.. I don't get it. lol :o
Sorry.
I'll have to see this bad boy in person.
What regionals are you headed to?
Atlanta as well?


Think of it like when you reel a fishing pole in too far, and it bends over because of the pressure.

JamesBrown 20-02-2007 19:07

Re: pic: Our spine
 
Quote:

Originally Posted by Cody Carey (Post 582726)
Think of it like when you reel a fishing pole in too far, and it bends over because of the pressure.

except you can control the direction it bends, so you can pick up in the front, the back, or any where in between just by changing the tension on the 4 cables.

Is it safe to assume that you guys have some clever control, or are you manually controlling the tension on the cables?

Darkforces 20-02-2007 19:25

Re: pic: Our spine
 
Unfortunatly the motors for the arm dont have encoders, however we dont really need them. I will say we do have "somthing special'' that helps with control.:D

Cody Carey 20-02-2007 19:27

Re: pic: Our spine
 
A miniature model of the robot?

Darkforces 20-02-2007 19:31

Re: pic: Our spine
 
Nope its part of our actual robot.

Nate Laverdure 20-02-2007 19:44

Re: pic: Our spine
 
Quote:

Originally Posted by Darkforces (Post 582773)
Nope its part of our actual robot.

I think he was talking about how to control the spine. You could control it with a model, if it was designed cleverly.

Darkforces 20-02-2007 20:08

Re: pic: Our spine
 
Quote:

Originally Posted by Nate Laverdure (Post 582785)
I think he was talking about how to control the spine. You could control it with a model, if it was designed cleverly.

Im sorry im not following could you please explain?

Cowmankoza 20-02-2007 20:15

Re: pic: Our spine
 
Quote:

Originally Posted by Nate Laverdure (Post 582785)
I think he was talking about how to control the spine. You could control it with a model, if it was designed cleverly.


What he is stating is that you could make a miniature version of your arm in order to control your robot, you have a feedback sensor on the model on the points of movement, and you have the same on the larger version and you just work it in the code to say when this is he (on the mini) this goes here (on the real one), im not sure of how its exactly done, but i have seen it done before

Darkforces 20-02-2007 20:18

Re: pic: Our spine
 
Oh i get it know, crap now why didn't we think of that. Its a good idea unfortunately we didn't think of it and probably wouldn't of had time to do it.

silicon_ghoti 20-02-2007 20:52

Re: pic: Our spine
 
Guess' for control:
1. A resisting flex seonsor allowing for the approximate bend of the antenna to be read.
2. A camera that looks for a "green blob" on the end.

and coolest (but least likely)...

3. Your using a fiber-optics cable and analyzing the light distortion to find how your bent!!!!:eek:

Nuttyman54 20-02-2007 21:23

Re: pic: Our spine
 
The most direct (and probably easiest) method would just be to build a miniature version of the arm and put potentiometers where the motors would interface. Then you just read the pot values and map them.

If you design it, you can build it into a project box the size of a joystick base during your fix-it windows, and just plug it in at competition

goingdeafsoon5 04-03-2007 16:41

Re: pic: Our spine
 
that is crazy i cant wait to see it in action at the FL regional

I think we are using the same mecanum wheels as you guys

teenmisfit 07-03-2007 01:46

Re: pic: Our spine
 
This is def. gunna b the bot i want to go check out at atlanta! way cool and u need to release a video :D

viking1902 07-03-2007 02:29

Re: pic: Our spine
 
I have been fortunate enough to see the prototype of this arm in action and I can vouch for its extreme awesomeness. Its probably one of the coolest arms that I have ever seen attached to a FIRST robot.

Darkforces 07-03-2007 09:23

Re: pic: Our spine
 
I know i promised video but there have been some technical problems but thursday i will post video from the florida regional for those who want to see it and wont be there.

Rick-906 07-03-2007 13:17

Re: pic: Our spine
 
my mind, is blown

if that monster works, you guys deserve an award
please please please get a video up soon! i cant wait to see this!

AdamHeard 23-08-2007 21:15

Re: pic: Our spine
 
Did this ever end up working?

Brandon Holley 23-08-2007 22:06

Re: pic: Our spine
 
Quote:

Originally Posted by AdamHeard (Post 639796)
Did this ever end up working?

i saw it in action on the FL regional webcast and it appeared that they took the arm off for most of their matches....


anybody have video/info ?

Billfred 23-08-2007 22:21

Re: pic: Our spine
 
They competed at Palmetto this year; I recall them scoring ringers, but I don't think their arm was ever used on the field to its full potential.

bear24rw 25-08-2007 22:00

Re: pic: Our spine
 
Someone defientely needs to find some videos of this thing working..

Darkforces 27-08-2007 14:33

Re: pic: Our spine
 
at florida we ran into a mess of programming problems that ended up breaking our arm. For palmeto we shorten it giving us more control and we could score about 3 or 4 per match when we didnt have somebody on us. It never worked as well as we wanted it to but we learned alot and its cool to just mess around with it.


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