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-   -   pic: Team 148 - 2011 - Raptor (http://www.chiefdelphi.com/forums/showthread.php?t=92368)

JVN 19-02-2011 19:35

pic: Team 148 - 2011 - Raptor
 

http://www.youtube.com/watch?v=XECmOwmYiu8

O'Sancheski 19-02-2011 19:36

Re: pic: Team 148 - 2011 - Raptor
 
I will be the first to comment and that is the coolest looking bot i have ever seen

Matt704 19-02-2011 19:41

Re: pic: Team 148 - 2011 - Raptor
 
Another year, another great Robot!! See y'all in Dallas. :cool:

AndrewMorrison 19-02-2011 19:43

Re: pic: Team 148 - 2011 - Raptor
 
Amazing again!

seans341 19-02-2011 19:43

Re: pic: Team 148 - 2011 - Raptor
 
Is that another nonadrive I see there?

O'Sancheski 19-02-2011 19:44

Re: pic: Team 148 - 2011 - Raptor
 
I was just looking closely at your drivetrain. Is that the same drive system you guys used last year?

MrForbes 19-02-2011 19:44

Re: pic: Team 148 - 2011 - Raptor
 
Beautiful! Hope to see it in person later this season...

Hegemoni 19-02-2011 19:44

Re: pic: Team 148 - 2011 - Raptor
 
I cannot wait to see this bot in action. Jaw dropping to say the least.

BrendanB 19-02-2011 19:46

Re: pic: Team 148 - 2011 - Raptor
 
Wow! This is one of the most beautiful robots I have seen!

Another quality machine from the 148 crew!

Chris is me 19-02-2011 19:55

Re: pic: Team 148 - 2011 - Raptor
 
Congratulations. That's really all I have to say.

MattC9 19-02-2011 19:57

Re: pic: Team 148 - 2011 - Raptor
 
Another great one I counting down the days to Alamo to see this bad boy in action. Just curious, why the name raptor after armadillo, tornado, tumble weed, ect.

jwfoss 19-02-2011 20:01

Re: pic: Team 148 - 2011 - Raptor
 
I for one am glad I live and compete in New England. Awesome job guys.

DinerKid 19-02-2011 20:01

Re: pic: Team 148 - 2011 - Raptor
 
Beautiful. Just Beautiful. I need to calm down before i can figure out what i am feeling...

~DK

JaneYoung 19-02-2011 20:09

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by MattC9 (Post 1026927)
Another great one I counting down the days to Alamo to see this bad boy in action. Just curious, why the name raptor after armadillo, tornado, tumble weed, ect.

Taking 1 guess: Birds of prey feel quite at home here in Texas. If you search for 'photos of Texas raptors' - you will see what I'm talking about. If 148 is choosing to stay true to their Texas theme, they are - beautifully.

Jane

Zach O 19-02-2011 20:12

Re: pic: Team 148 - 2011 - Raptor
 
Between the underglow and the engineering, it's mesmerizing.

Great video to go along with it. It's always fun to watch the videos.

BJC 19-02-2011 20:17

Re: pic: Team 148 - 2011 - Raptor
 
I really like the way you throw tubes out to the end of the lane instead of going up to the wall.

Oh ya, cool robot too.;)

s_forbes 19-02-2011 20:22

Re: pic: Team 148 - 2011 - Raptor
 
Killer mechanism, the extending linkage on the top is brilliant! The large gear/arm member on the bottom looks like a part that could cause a lot of headaches... did you have any strange issues to overcome with meshing a gear to the stacked aluminum plates?

I also love the way you implemented a telescoping mechanism with the rollers in the tube, I'm gonna have to play with that idea in the future. Lots of clever bits wrapped into your bot this year.

Fantastic robot as usual, and once again I'm super jealous of your fabrication abilities.

thefro526 19-02-2011 20:24

Re: pic: Team 148 - 2011 - Raptor
 
Wow.

That robot is amazing, I'm especially fond of the deployment system for the mini-bot.

Way to go 148.

JVN 19-02-2011 20:30

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by s_forbes (Post 1026960)
Killer mechanism, the extending linkage on the top is brilliant! The large gear/arm member on the bottom looks like a part that could cause a lot of headaches... did you have any strange issues to overcome with meshing a gear to the stacked aluminum plates?

I also love the way you implemented a telescoping mechanism with the rollers in the tube, I'm gonna have to play with that idea in the future. Lots of clever bits wrapped into your bot this year.

Fantastic robot as usual, and once again I'm super jealous of your fabrication abilities.

The low gearbox driving a high shoulder joint via a linkage (we call this the "hip joint") was inspired by the 67-2007 robot which had this VERY cool feature. We added our own twist by making it a 4-bar linkage. Now it is a double 4-bar (we've been making double 4-bar jokes ALL season).

The practice robot shoulder joint has been running up and down since Day 18 of the build. It "just works." No worries at all with the plate gear experiment. Lots of laser cut plate gears on Raptor...

Yes, we are proud of some of the more subtle features inside Raptor. I know there are some that most people totally ignore that will be impressive to a mechanical designer with a good eye...

-John

sgreco 19-02-2011 20:42

Re: pic: Team 148 - 2011 - Raptor
 
That right there is what FIRST is all about...simply inspiring...

EricH 19-02-2011 21:00

Re: pic: Team 148 - 2011 - Raptor
 
It reminds me of a certain dominating machine from 2007... with some very scary twists. Scary, that is, if you're behind the opposite glass. Looking good!

Cyberphil 19-02-2011 21:34

Re: pic: Team 148 - 2011 - Raptor
 
Wow. Thats all I have to say.

Kevin Kolodziej 19-02-2011 21:35

Re: pic: Team 148 - 2011 - Raptor
 
Very nice robot, 148. Much to learn from this one. Good luck to you this year, and you can be sure I'll be paying your pit a visit in St. Louis ::safety::

P.S. Awesome musical taste, as usual ;)

Brandon Holley 19-02-2011 21:41

Re: pic: Team 148 - 2011 - Raptor
 
Eh, looks decent.... ;)


Kudos on another terrific machine 148. The hard work your entire team puts in all season really shows in the final(ish) product.

-Brando

R1ffSurf3r 19-02-2011 21:54

Re: pic: Team 148 - 2011 - Raptor
 
how quick is that minibot

Adam Freeman 19-02-2011 22:07

Re: pic: Team 148 - 2011 - Raptor
 
Thank you, this is exactly what I needed after a long day in the shop.

Great design! I love the push link and the roller claw....seems vaguely familiar.

Thanks for the note :p

Can't wait to see it in person. I guess I will have to watch the video a few more times...maybe there's more hidden gems.

Awesome job 148!

EDIT: Didn't notice the first 10 times, but that is an articulating roller claw....just amazing!

Aren_Hill 19-02-2011 22:47

Re: pic: Team 148 - 2011 - Raptor
 
Not enough polycord for a Raptor john

http://www.chiefdelphi.com/media/photos/33501

:P

1086VEX 19-02-2011 23:26

Re: pic: Team 148 - 2011 - Raptor
 
wow... i wish we could get the chance to play with you guys more often. your bots are always some of the most intricate and well designed machines out there. props on another insane bot!! best of luck this year!

ratdude747 19-02-2011 23:31

Re: pic: Team 148 - 2011 - Raptor
 
wow... you guys seem to love the the robot lights.

looks sweet, thats for sure. performs well.

Good luck!

Pat Fairbank 19-02-2011 23:58

Re: pic: Team 148 - 2011 - Raptor
 
Totally awesome. I've been following the blog all season, and the finished product definitely exceeds the high expectations I developed from that.

Can't wait to see it in person at CMP (and maybe get a guided tour of the subtleties?).
Quote:

Originally Posted by JVN (Post 1026973)
Yes, we are proud of some of the more subtle features inside Raptor. I know there are some that most people totally ignore that will be impressive to a mechanical designer with a good eye...


AdamHeard 20-02-2011 00:19

Re: pic: Team 148 - 2011 - Raptor
 
It's a great machine, I loved the intro! Love the four bar even more, especially combining the rotation of the claw into the four bar.

I hope it does better than the last two robots named raptor (973 in 09, and 254 in 07), both fell in the semis at champs.

Akash Rastogi 20-02-2011 00:28

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by jwfoss (Post 1026931)
I for one am glad I live and compete in New England. Awesome job guys.

I wish we competed down in Texas.

Looking good 148.

And remember, don't let them haters hate.

robodude03 20-02-2011 00:48

Re: pic: Team 148 - 2011 - Raptor
 
John and 148 Members,

This is a beautiful machine and excellent intro video as always. We hope to see you in champs and good luck this season! I absolutely love the physical stop you placed on the arm to articulate the tubes into the right position.

Flyer522 20-02-2011 01:07

Re: pic: Team 148 - 2011 - Raptor
 
Absolutely Awesome!

SteveGPage 20-02-2011 01:27

Re: pic: Team 148 - 2011 - Raptor
 
JVN and crew:

You are more than engineers, you are artists!

(or maybe that should read - you are more than artists, you are engineers!)

Arefin Bari 20-02-2011 01:44

Re: pic: Team 148 - 2011 - Raptor
 
Dear team 148,

You are giving me nightmares. I admire your capabilities and your teamwork. Thank you for sharing the video with us and I sure hope I get the chance to see this robot in person. You all are an inspiration to the young generation.

- Arefin.

Jacob Paikoff 20-02-2011 01:47

Re: pic: Team 148 - 2011 - Raptor
 
Great video, awesome robot.

I hope that I have a chance to see it in person in St. Louis

flippy147852 20-02-2011 02:28

Re: pic: Team 148 - 2011 - Raptor
 
Wow... once again 148 has produced a stellar bot.

Can't wait to (hopefully) see it in person in St. Louis!

Leav 20-02-2011 03:05

Re: pic: Team 148 - 2011 - Raptor
 
What can I add beyond what has already been said? I am quite simply floored.

If you are making a pamphlet which explains your robot mechanically (I'm thinking of this one from simbotics in 08), I'd love to see it.

I'm constantly sharing great designs with my team and, well, let's say your design "qualifies"... :)

Yet another reason for us to strive for st. louis...

-Leav

Chris Fultz 20-02-2011 08:10

Re: pic: Team 148 - 2011 - Raptor
 
Very cool.

Great work 148.

Tetraman 20-02-2011 08:26

Re: pic: Team 148 - 2011 - Raptor
 
Can you imagine what they can do if a "feeder robot" was on their alliance?

MagiChau 20-02-2011 08:52

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Tetraman (Post 1027319)
Can you imagine what they can do if a "feeder robot" was on their alliance?

They probably don't even need a feeder robot if there is a human player chucking tubes over at them to hang.

kgzak 20-02-2011 11:54

Re: pic: Team 148 - 2011 - Raptor
 
Video has been blocked by Sony Music Entertainment :mad:

Alex.q 20-02-2011 12:30

Re: pic: Team 148 - 2011 - Raptor
 
Wow. I love robots like this where everything is planned out and fits together perfectly. I'd love to work on a robot like yours.

I'm interested in how you guys operate during the build season. How long does your team take to design before you begin to build the robot, when do the programmers get their hands on it, how much time do you leave for drivers to practice?

Bjenks548 20-02-2011 12:38

Re: pic: Team 148 - 2011 - Raptor
 
Glad this beast in down in Texas. Unfortunately I'm going to have to deal with its Green twin probably. Any specs on the Mini bot speed? Looks to be magnetic. Robot looks awesome, hope you aren't on the blue alliance too much.

Greg Needel 20-02-2011 12:49

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Bjenks548 (Post 1027427)
Unfortunately I'm going to have to deal with its Green twin probably.


There are no twins of this robot besides our practice bot.

Amy Yznaga 20-02-2011 13:01

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Alex.q (Post 1027422)
I'm interested in how you guys operate during the build season. How long does your team take to design before you begin to build the robot, when do the programmers get their hands on it, how much time do you leave for drivers to practice?

JVN blogged about 148's entire build season. you can read it here: http://blog.iamjvn.com/

Bjenks548 20-02-2011 15:07

Re: pic: Team 148 - 2011 - Raptor
 
Was there any collaboration between 217 and 148 this year?

Greg Needel 20-02-2011 15:16

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Bjenks548 (Post 1027548)
Was there any collaboration between 217 and 148 this year?

148 did not collaborate with any teams, if there are any similarities between us and any other teams that share our sponsor it is because we are all friends and share manufacturing capabilities, but there was no direct design sharing this year.

ks_mumupsi 20-02-2011 15:30

Re: pic: Team 148 - 2011 - Raptor
 
nice looking, though I wouldnt expect anythin gless :).. hope to see you guys in St. Louis.

pacoliketaco 20-02-2011 16:32

Re: pic: Team 148 - 2011 - Raptor
 
One of my favorite videos this time of year is always the final display from 148. yet again i am not disappointed. you guys amaze me in what you are capable of. One thing id like to know is how you train your students to make such amazing robots. The design alone must take many many hours of CADing. as a sophomore meche with a considerable amount of design experience i know I'd have quite a challenge making something like your robots.

Andrew Schreiber 20-02-2011 18:05

Re: pic: Team 148 - 2011 - Raptor
 
Eh, it is ok, I think it will get better as the season progresses. ;)


Seriously though, nice video can't wait to see how this thing works by the time Championship comes around.

bcharbonneau 20-02-2011 18:24

Re: pic: Team 148 - 2011 - Raptor
 
Great job again RoboWranglers. We look forward to seeing you in San Antonio.(Team 1296).

Tyler Hicks 20-02-2011 19:35

Re: pic: Team 148 - 2011 - Raptor
 
I noticed there is a 217 sign in the background of the shop.

Hmmmmm.

ahollenbach 20-02-2011 19:49

Re: pic: Team 148 - 2011 - Raptor
 
It's beautiful! Everything is so fluid and an excellent design!

EricH 20-02-2011 19:53

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Tyler Hicks (Post 1027762)
I noticed there is a 217 sign in the background of the shop.

Hmmmmm.

And there was a Simbotics sweatshirt on one of the students in a picture...

Nick Rixford 20-02-2011 20:00

Re: pic: Team 148 - 2011 - Raptor
 
Sick bot as always! hope to see you at St. Louis!

ouellet348 20-02-2011 20:08

Re: pic: Team 148 - 2011 - Raptor
 
nice bot, I'll be curious to see what 217 and 1114 look like this year though, either way this is a very well engineered bot

James Tonthat 20-02-2011 21:09

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1026973)
Yes, we are proud of some of the more subtle features inside Raptor. I know there are some that most people totally ignore that will be impressive to a mechanical designer with a good eye...

Not claiming I have a good eye, but really impressive. I love how you guys keep outdoing yourselves.

Can't wait to see it in San Antonio.

Norman J 20-02-2011 21:21

Re: pic: Team 148 - 2011 - Raptor
 
Echoing the sentiments of many before me, I congratulate 148 on an awesomely impressive robot. Your designs are inspiring and your videos extremely cool.

Karthik 20-02-2011 21:54

Re: pic: Team 148 - 2011 - Raptor
 
I was going to post a funny joke, but it may not have been appreciated. ;) Either way, awesome robot once again.

samir13k 20-02-2011 21:58

Re: pic: Team 148 - 2011 - Raptor
 
Karthik took down his funny joke so i took down my funny response :/

on the other hand though, Oh dang...

xSAWxBLADEx 20-02-2011 22:08

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Karthik (Post 1027927)
I was going to post a funny joke, but it may not have been appreciated. ;) Either way, awesome robot once again.

i wanna hear, i wanna hear :)

nuggetsyl 20-02-2011 22:28

Re: pic: Team 148 - 2011 - Raptor
 
The mini bot alone will win most of there matches. Great job guys.

PaW 21-02-2011 03:30

Re: pic: Team 148 - 2011 - Raptor
 
I really have to commend your media crew. The insane amount of hours it must've taken to compile all the pictures and edit the video footage... that is A LOT of work. And every year, the reveal video is breathtaking, and just a bit better than the previous year. Nice work!

The robot looks pretty good too. ;)

My jaw has become quite adept at self-healing, even with all the repeated drops to the floor.

SuburBot 21-02-2011 12:40

Re: pic: Team 148 - 2011 - Raptor
 
Hello Robowranglers,
Very impressive robot! :eek:
This year, I'm hosting a Robot video unveiling competition. More info can be found here:
http://suburbots2115.wordpress.com/ruv-comp/
I believe your video fits all the requirements. Would you consider joining for the chance to win bragging rights and a PNG image file badge? All you have to do is post your team name and number and a link to your video on this CD thread:
http://www.chiefdelphi.com/forums/sh...threadid=88184
Thank You

JesseK 21-02-2011 14:35

Re: pic: Team 148 - 2011 - Raptor
 
Great music selection :cool: and a front-contending bot as usual. I got some interest in creating an offseason nonadrive based on this video, but I'm still fairly certain it's beyond our fabrication abilities. Maybe we'll do a 12fps+ slide drive instead.

Those of us who never saw 67's linkage are left to ponder the way the 148 linkage works. Is it like the locomotive linkages on old-school trains?

Chris is me 21-02-2011 16:07

Re: pic: Team 148 - 2011 - Raptor
 
I've got a question. This question isn't a criticism disguised as a question.

What reasons would a team want to deviate from the "standard" method of powering an arm by bolting a sprocket to it and chaining it off a high reduction gearmotor? Basically, what are the advantages of the cool linkage pushing up on your arm as opposed to driving the rotational joint of the arm?

I've never learned much about arms and I don't understand the advantage or disadvantage of either system, other than CG placement.

Bochek 21-02-2011 16:13

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Chris is me (Post 1028490)
I've got a question. This question isn't a criticism disguised as a question.

What reasons would a team want to deviate from the "standard" method of powering an arm by bolting a sprocket to it and chaining it off a high reduction gearmotor? Basically, what are the advantages of the cool linkage pushing up on your arm as opposed to driving the rotational joint of the arm?

I've never learned much about arms and I don't understand the advantage or disadvantage of either system, other than CG placement.


I had the same thoughts, and can't seem to find a reason besides CG.

Defiantly interested to know.

- Bochek

JVN 21-02-2011 16:51

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Chris is me (Post 1028490)
I've got a question. This question isn't a criticism disguised as a question.

What reasons would a team want to deviate from the "standard" method of powering an arm by bolting a sprocket to it and chaining it off a high reduction gearmotor? Basically, what are the advantages of the cool linkage pushing up on your arm as opposed to driving the rotational joint of the arm?

I've never learned much about arms and I don't understand the advantage or disadvantage of either system, other than CG placement.

CG isn't reason enough?

One other reason is my hatred of chain, but mainly for CG reasons.
I would also suspect this is lighter than an equivalent low-gearbox + chain + sprocket...

Plus... c'mon... DOUBLE FOURBAR!

Jonathan Norris 21-02-2011 17:10

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1028544)
Plus... c'mon... DOUBLE FOURBAR!

HOOWWW DOESS IT WORK??!?!? :confused:

Bochek 21-02-2011 17:33

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1028544)
CG isn't reason enough?

One other reason is my hatred of chain, but mainly for CG reasons.
I would also suspect this is lighter than an equivalent low-gearbox + chain + sprocket...

Plus... c'mon... DOUBLE FOURBAR!


Now I must ask, where does your hatred of chain come from? Honestly The only time i have ever had problems is when it is very very poorly tensioned.

-Bochek

AdamHeard 21-02-2011 17:45

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Bochek (Post 1028578)
Now I must ask, where does your hatred of chain come from? Honestly The only time i have ever had problems is when it is very very poorly tensioned.

-Bochek

You hit a point in design where you almost get bored, and you have to go further and try new things.

Chain is functional, 148's goals are higher than achieving functionality. There were some benefits (some may say they're small, I disagree) to this design over chain and they designed for that. I imagine never having to break chain, tension chain, deal with chain growing, etc. are pretty nice. I would imagine their goal is to keep making cool, great performing stuff, while never having to do repair or maintenance.

MasonMM 21-02-2011 17:49

Re: pic: Team 148 - 2011 - Raptor
 
Oh, my god. Double fourbar! What does it mean?!

Its so vivid!

Akash Rastogi 21-02-2011 17:51

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by MasonMM (Post 1028601)
Oh, my god. Double fourbar! What does it mean?!

Its so vivid!

Lololololol

Adam Freeman 21-02-2011 18:14

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Chris is me (Post 1028490)
I've never learned much about arms and I don't understand the advantage or disadvantage of either system, other than CG placement.

When we did it in 2007, it was specifically for CG purposes. I did not want to mount a gearbox near the top of the arm. I also did not want to run chain from the gear box to a sprocket at the top of the arm.

There is also a design elegance to doing something different than running chain.

I can tell you there are advantages and disadvantages to it. CG is probably the biggest advantage...other than 4 bar linkages are always cooler. In my mind the biggest disadvantage is the amount of packaging room required to allow the push link and connecting link to swing in the bottom of the robot.

In 2008 we wanted to use a double 4 bar, but could not get it to package... so we mounted a sprocket to the arm and ran a long strand of chain.

MrForbes 21-02-2011 18:33

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by AdamHeard (Post 1028593)
I would imagine their goal is to keep making cool, great performing stuff, while never having to do repair or maintenance.

If they don't have to repair or maintain the robot, they can spend their time and talent improving it. I like that idea.

JaneYoung 21-02-2011 18:50

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by squirrel (Post 1028640)
If they don't have to repair or maintain the robot, they can spend their time and talent improving it. I like that idea.

While true, when at the actual competitions, 148 can be found spending their time helping other teams. That's another way of spending their time and talent, improving.

It's going to be fun seeing the looks on a lot of rookies' faces when they see Raptor and 148 in action for the very first time.They'll wonder just what this FRC thing is all about and they'll want to learn more.

Jane

JVN 23-02-2011 12:02

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JesseK (Post 1028426)
Those of us who never saw 67's linkage are left to ponder the way the 148 linkage works. Is it like the locomotive linkages on old-school trains?

I just put up a blog post highlighting how the linkage works:
http://blog.iamjvn.com/2011/02/insid...hip-joint.html

-John

Akash Rastogi 23-02-2011 12:06

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1029988)
I just put up a blog post highlighting how the linkage works:
http://blog.iamjvn.com/2011/02/insid...hip-joint.html

-John

Very cool. Thanks for explaining.

What's driving the hip joint on your robot?

Brandon Holley 23-02-2011 13:51

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1029988)
I just put up a blog post highlighting how the linkage works:
http://blog.iamjvn.com/2011/02/insid...hip-joint.html

-John

If you can't appreciate cool mechanisms like this, you probably can't appreciate anything!!

I especially like the use of sheet metal for everything, including the stacked plates to create the gear teeth on the smaller arm driven by the gearbox.

Thanks for sharing JVN.

-Brando

JVN 23-02-2011 14:25

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Akash Rastogi (Post 1029990)
Very cool. Thanks for explaining.

What's driving the hip joint on your robot?

The shoulder joint is driven by (1) Banebots 775 motor, and (12) bands of surgical tubing.
You can see the 775 in this pic:
http://1.bp.blogspot.com/-rFQ0CRqTKR...0/IMG_8024.JPG

-John

Brandon Holley 23-02-2011 15:45

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1030061)
The shoulder joint is driven by (1) Banebots 775 motor, and (12) bands of surgical tubing.
You can see the 775 in this pic:
http://1.bp.blogspot.com/-rFQ0CRqTKR...0/IMG_8024.JPG

-John

You guys obviously rivet a lot, I assume you have a pneumatic rivet gun.

Any recommendations on one that is pretty reliable?

-Brando

JVN 23-02-2011 16:00

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Brandon Holley (Post 1030101)
You guys obviously rivet a lot, I assume you have a pneumatic rivet gun.

Any recommendations on one that is pretty reliable?

-Brando

We buy the crappy ones from Harbor Freight -- they last about a season before they break. We replace them every year. Students are hard on riveters.

-John

Garret 23-02-2011 16:18

Re: pic: Team 148 - 2011 - Raptor
 
This robot is amazing.

I would think that the double fourbar linkage would actually simplify the arm's joint design (at least in my mind it seems so much easier to deal with weight and taking loads) in that you would have to worry less about powering the pivoting point (gearboxes and chain) and instead focus on the making the actual joint stronger and more stable. I also could see it as isolating the motors and gearboxes from the abuse (as in side loads) the arm could take in a match, which I see as beneficial seeing how much defense this robot will likely have to put up with. Those are some of many potential benefits that I thought of when I first saw it.

JVN 24-02-2011 11:17

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1026973)
Yes, we are proud of some of the more subtle features inside Raptor. I know there are some that most people totally ignore that will be impressive to a mechanical designer with a good eye...

-John

After receiving a number of requests in response to this post, I decided to highlight some of the subtle parts of this year's design on my blog as part of an "Inside Raptor" series.

Here is a glimpse at one of the SIMPLE subtle features that I think makes Raptor special... press-on CIM pinions:
http://blog.iamjvn.com/2011/02/insid...ion-gears.html

-John

thefro526 24-02-2011 11:22

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1030614)

Here is a glimpse at one of the SIMPLE subtle features that I think makes Raptor special... press-on CIM pinions:
http://blog.iamjvn.com/2011/02/insid...ion-gears.html

-John

Wow, that's a really good idea. I can't tell from the picture, but does the pinion have the Key Shape cut into it, or do you just rely on the press fit to transfer the torque?

IKE 24-02-2011 11:26

Re: pic: Team 148 - 2011 - Raptor
 
Wow. The press on pinions are very elegant. Did you guys do any slip calcs or tests?

Brandon Holley 24-02-2011 11:26

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1030614)
After receiving a number of requests in response to this post, I decided to highlight some of the subtle parts of this year's design on my blog as part of an "Inside Raptor" series.

Here is a glimpse at one of the SIMPLE subtle features that I think makes Raptor special... press-on CIM pinions:
http://blog.iamjvn.com/2011/02/insid...ion-gears.html

-John

Hell. Yeah.

Awesome idea Greg. Kudos to team 20 for producing the parts.

-Brando

Chris is me 24-02-2011 11:28

Re: pic: Team 148 - 2011 - Raptor
 
That's a cool idea! I wish we had the resources to try cool things like that.

What's the easiest way for Low Resource Team to get press on CIM pinions?

Aren_Hill 24-02-2011 11:32

Re: pic: Team 148 - 2011 - Raptor
 
Well it works for dewalt pinions, why not elsewhere, great idea

MrForbes 24-02-2011 11:38

Re: pic: Team 148 - 2011 - Raptor
 
If you had the right size reamer, you could do it that way....

Press fits are a reliable way of holding gears onto shafts. Getting the fit right is sort of critical, but even if you can get it within a thousandth of an inch or so you should be ok, if it's a tight enough fit.

Drills don't work too well for this.

Also the dewalt gear is IMHO too small to fit reliably on the CIM shaft, there just isn't enough meat there. Others will disagree...

JVN 24-02-2011 12:04

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by thefro526 (Post 1030619)
Wow, that's a really good idea. I can't tell from the picture, but does the pinion have the Key Shape cut into it, or do you just rely on the press fit to transfer the torque?

We rely on just the press fit to transfer the torque. It works fine -- no problems after hours of aggressive use.

Travis Hoffman 24-02-2011 12:11

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Chris is me (Post 1030624)

What's the easiest way for Low Resource Team to get press on CIM pinions?

Bring the idea to Andy Baker's attention? :)

Identify potential sponsors in your area who have EDM capability, and ask nicely.

...or reach out to a team in your region who already has an EDM-capable sponsor, then see if you can barter with them. We'll machine X parts for you if you give us Y extra parts or machine Z for us in return. Bartering is fun around these here parts. Our NEOFRA teams trade materials and sponsor services all the time. Example: I submitted some lexan from 379 to our waterjet sponsor along with all our parts; in return, the RoboCats gave me their unused KOP accumulator.

Andy Baker 24-02-2011 12:53

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Travis Hoffman (Post 1030649)
Bring the idea to Andy Baker's attention? :)

Huh, what, did someone mention me in the same thread as this beautiful and effective robot?

I will be sure to bug John and Greg about this in San Antonio next week.

Andy

thefro526 24-02-2011 12:57

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1030645)
We rely on just the press fit to transfer the torque. It works fine -- no problems after hours of aggressive use.

Quote:

Originally Posted by Andy Baker (Post 1030676)
Huh, what, did someone mention me in the same thread as this beautiful and effective robot?

I will be sure to bug John and Greg about this in San Antonio next week.

Andy

Hmmm, I really, really hope this makes it into the AM Product line. Now that I think about it, Press Fit Pinions would make transmission assembly way easier.

MrForbes 24-02-2011 14:39

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by thefro526 (Post 1030680)
Hmmm, I really, really hope this makes it into the AM Product line. Now that I think about it, Press Fit Pinions would make transmission assembly way easier.

And pinion/motor disassembly more difficult.

Not that WE've ever lost a gear due to lack of lubrication....just sayin.....but I suppose having a couple extra motors with gears pressed on would be a reasonable thing to do.

Manoel 24-02-2011 16:15

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by JVN (Post 1030614)
After receiving a number of requests in response to this post, I decided to highlight some of the subtle parts of this year's design on my blog as part of an "Inside Raptor" series.

Here is a glimpse at one of the SIMPLE subtle features that I think makes Raptor special... press-on CIM pinions:
http://blog.iamjvn.com/2011/02/insid...ion-gears.html

-John

One of those d'oh! moments... We've been wire EDM'ing all gears for our gearboxes since 2007 and that stupidly simple idea never occurred to me! In 2012 we won't be fighting with keyways, let me tell you that!

Greg Needel 24-02-2011 16:42

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Chris is me (Post 1030624)
That's a cool idea! I wish we had the resources to try cool things like that.

What's the easiest way for Low Resource Team to get press on CIM pinions?


The easy answer is find someone with a wire edm to make them for you. You can do pressfits with a reamer on a lathe, but the issue with these is that every gear that I found that was off the shelf 11tooth already had a bore which was over the pressfit size. So you would need to find a source for some gear stock (if you find it let me know I couldn't find any. )

Cory 24-02-2011 18:36

Re: pic: Team 148 - 2011 - Raptor
 
Quote:

Originally Posted by Greg Needel (Post 1030816)
The easy answer is find someone with a wire edm to make them for you. You can do pressfits with a reamer on a lathe, but the issue with these is that every gear that I found that was off the shelf 11tooth already had a bore which was over the pressfit size. So you would need to find a source for some gear stock (if you find it let me know I couldn't find any. )

You can get 12T 20DP gearstock. Obviously not quite what you have, but if a team were to be satisfied with a 12T already and just wanted to press it on, that would be a solution.


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