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-   -   pic: FRC973 offseason teaser #5 (http://www.chiefdelphi.com/forums/showthread.php?t=97267)

AdamHeard 07-09-2011 16:00

pic: FRC973 offseason teaser #5
 

Frenchie461 07-09-2011 16:01

Re: pic: FRC973 offseason teaser #5
 
It's a new minibot alignment system (at least that's my guess) :D

O'Sancheski 07-09-2011 16:12

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by Frenchie461 (Post 1076249)
It's a new minibot alignment system (at least that's my guess) :D

Could be, but they already have a ramp. Don't know you can improve on their massive lexan alignment system?

Nemo 07-09-2011 16:30

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by O'Sancheski (Post 1076251)
Could be, but they already have a ramp. Don't know you can improve on their massive lexan alignment system?

I guess one could make it less massive while not making it too much less voluminous.

O'Sancheski 07-09-2011 17:20

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by Nemo (Post 1076256)
I guess one could make it less massive while not making it too much less voluminous.

They want it massive. It lets them have a smaller margin of error. The alignment "V" on their ramp is so large so they don't have to be anywhere close to being aligned with the pole.

Akash Rastogi 07-09-2011 18:35

Re: pic: FRC973 offseason teaser #5
 
This is gonna be the coolest swerve in the West.:rolleyes:

Is that bracket also going to be reinforced with welding on the frame, or is the bracket enough?

Looking good!

MattC9 07-09-2011 18:41

Re: pic: FRC973 offseason teaser #5
 
Could this be a corner of a chassis? :eek:

BrendanB 07-09-2011 20:04

Re: pic: FRC973 offseason teaser #5
 
Looks like the corner to a chassis but the giant hole has me guessing a simple bumper mount. What are the thicknesses of the metal?

PAR_WIG1350 07-09-2011 22:57

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by Akash Rastogi (Post 1076274)
This is gonna be the coolest swerve in the West.:rolleyes:

Is that bracket also going to be reinforced with welding on the frame, or is the bracket enough?

Looking good!

Could be titanium, But that seems like a lot of machining for titanium.

AdamHeard 07-09-2011 23:57

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by PAR_WIG1350 (Post 1076313)
Could be titanium, But that seems like a lot of machining for titanium.

It's all plain 6061 Aluminum. The tubing is 1/16" wall, and the gusset plate is 1/16" thick. Those are 3/16" rivets and this is the finished assembly, no additional welding or bolting.

Akash Rastogi 08-09-2011 00:32

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by AdamHeard (Post 1076325)
It's all plain 6061 Aluminum. The tubing is 1/16" wall, and the gusset plate is 1/16" thick. Those are 3/16" rivets and this is the finished assembly, no additional welding or bolting.

Figured as much. I'm liking the no weld designs from you.

Hawiian Cadder 08-09-2011 03:04

Re: pic: FRC973 offseason teaser #5
 
Probably not legal, but it would be cool if this robot could deploy 2 mini-bots simultaneously.

Brandon Holley 08-09-2011 08:59

Re: pic: FRC973 offseason teaser #5
 
Am I right in assuming there is another one of these brackets on the underside of this assembly?

We've been building frames like this for the past few years now and we really like how they turn out. In terms of getting an extremely square and accurate frame, I haven't found a better way. The nice thing with this as well, is that while welding usually isn't necessary after final construction, if you do decide to weld, the frame is already jigged together for you.

-Brando

Holtzman 08-09-2011 20:35

Re: pic: FRC973 offseason teaser #5
 
All the cool teams use 1/4" Rivets.

Akash Rastogi 08-09-2011 20:50

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by Hawiian Cadder (Post 1076339)
Probably not legal, but it would be cool if this robot could deploy 2 mini-bots simultaneously.

No because that would be pointless. Lol

dodar 08-09-2011 21:06

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by Akash Rastogi (Post 1076411)
No because that would be pointless. Lol

Actually more like 50. lol

AdamHeard 08-09-2011 21:27

Re: pic: FRC973 offseason teaser #5
 
Brandon, the lower gusset is actually our .125 thick full size bellypan. This year we had the bellypan and an internal block, no upper gusset. A student pointed out we should try an upper gusset for our 6wd instead, and it turned out to be obviously a lot simpler and easier to make. The internal blocks are a pain to fabricate.

Quote:

Originally Posted by Holtzman (Post 1076409)
All the cool teams use 1/4" Rivets.

Haha, we've only recently really started using rivets in this fashion, and #10-32 bolts are our standard, so 3/16" matches up well. Our pneumatic and hand riveters only go to 3/16" as well. A "big daddy" is on our wishlist, we'll see what happens. It'd be nice to know we can drill out 3/16" and go to 1/4" as a quick fix.

Brandon Holley 09-09-2011 08:54

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by AdamHeard (Post 1076417)
Brandon, the lower gusset is actually our .125 thick full size bellypan. This year we had the bellypan and an internal block, no upper gusset. A student pointed out we should try an upper gusset for our 6wd instead, and it turned out to be obviously a lot simpler and easier to make. The internal blocks are a pain to fabricate.

Ah, yes that makes sense. We've built frames for our manipulators/elevators/etc. using the same technique where gussets would be on either side; that is why I asked the question.

Looking forward to seeing the completed assembly.


Quote:

Originally Posted by AdamHeard (Post 1076417)
Haha, we've only recently really started using rivets in this fashion, and #10-32 bolts are our standard, so 3/16" matches up well. Our pneumatic and hand riveters only go to 3/16" as well. A "big daddy" is on our wishlist, we'll see what happens. It'd be nice to know we can drill out 3/16" and go to 1/4" as a quick fix.

What material rivets are you using? We used 3/16" stainless on our claw this year, and we had a hell of a time popping them by hand. Luckily our sponsor has a more specialized rivet gun so we were able to get them eventually, but it definitely required the correct tool.

-Brando

Katie_UPS 09-09-2011 12:40

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by AdamHeard (Post 1076325)
It's all plain 6061 Aluminum.

...no additional welding or bolting.

That's too bad. 6061 is fun and nice to weld. :P

Borisdamole 10-09-2011 13:30

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by Katie_UPS (Post 1076463)
That's too bad. 6061 is fun and nice to weld. :P

But if its welded it is harder to repair (especially if already powered coated)

Some welded powder coated robots frames show cracks in the welds by the end of the season after some hard matches.

Katie_UPS 10-09-2011 21:19

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by Borisdamole (Post 1076540)
But if its welded it is harder to repair (especially if already powered coated)

Some welded powder coated robots frames show cracks in the welds by the end of the season after some hard matches.

Yeah... My old team used to anodize. No problems with cracking, but re-welding anything was bad news. Are the cracks the result of powder coating + welding? Or is it just that the cracks are more visible due to the powder coating? Its kind of a dumb question, I know, but I don't think any of our anodized welds showed cracks (aside from a fall off a ramp in 2007).

Borisdamole 11-09-2011 08:51

Re: pic: FRC973 offseason teaser #5
 
Quote:

Originally Posted by Katie_UPS (Post 1076571)
Yeah... My old team used to anodize. No problems with cracking, but re-welding anything was bad news. Are the cracks the result of powder coating + welding? Or is it just that the cracks are more visible due to the powder coating? Its kind of a dumb question, I know, but I don't think any of our anodized welds showed cracks (aside from a fall off a ramp in 2007).

The powder coat defiantly will make them more noticeable. The powder coating was not the cause of the crack.

A crack on the powder was a great indication that the weld COULD be a problem.

I am just saying that with the riveted solution, a cracked weld is NEVER a problem!

Katie_UPS 11-09-2011 13:53

Re: pic: FRC973 offseason teaser #5
 
Gotcha.

Anyways, super cool looking brackets.


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