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-   -   pic: How 2415 is rolling for 2014 (http://www.chiefdelphi.com/forums/showthread.php?t=125374)

sdcantrell56 28-01-2014 10:19
pic: How 2415 is rolling for 2014
 

TheFrozenSlink 28-01-2014 12:02
Re: pic: How 2415 is rolling for 2014
 
You might want to add a center drop to what, the versa blocks come pre made with offset holes, by flipping the blocks on the outside wheels so that the flat part is on top, you can add an (IIRC) 1/8th in center drop.

Brandon Holley 28-01-2014 12:04
Re: pic: How 2415 is rolling for 2014
 
What is this chain nonsense on a 2415 bot?? :-P

-Brando

Richard Wallace 28-01-2014 12:34
Re: pic: How 2415 is rolling for 2014
 
WCD in a box! Who'da thunkit!

Looking good so far, don't forget the bumper brackets. ;)

JohnSchneider 28-01-2014 12:57
Re: pic: How 2415 is rolling for 2014
 
West coast, best coast.

Anupam Goli 28-01-2014 13:48
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by TheFrozenSlink (Post 1333667)
You might want to add a center drop to what, the versa blocks come pre made with offset holes, by flipping the blocks on the outside wheels so that the flat part is on top, you can add an (IIRC) 1/8th in center drop.
It looks like a square chassis, so I don't think turning will be too big of a problem with the setup they have going. Besides, I don't think 2415 would show up to a competition with a drivebase that doesn't turn or has a tough time turning ;)

Michael Corsetto 28-01-2014 13:55
Re: pic: How 2415 is rolling for 2014
 
Curious, why the decision to run chain on the outside of your side rails?

Looks beautiful, great work!

-Mike

Richard Wallace 28-01-2014 14:14
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by Michael Corsetto (Post 1333711)
Curious, why the decision to run chain on the outside of your side rails?
In a contest between a stationary digital sidecar and a (suddenly loose) length of #25 chain moving at >12 fps, which one wins?

TD78 28-01-2014 14:18
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by Richard Wallace (Post 1333719)
In a contest between a stationary digital sidecar and a (suddenly loose) length of #25 chain moving at >12 fps, which one wins?
Not to mention it's easier servicing sprockets and chain outside of the gearbox.

wireties 28-01-2014 14:24
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by Michael Corsetto (Post 1333711)
Curious, why the decision to run chain on the outside of your side rails?

Looks beautiful, great work!

-Mike
Ditto - looks great!

Are you nervous having the cantilevered portion of the shaft longer than is WCD-typical? And now both forces from the wheels and the chain are working on the extended (from the frame) portion of the shaft.

Sorry if this is a silly question - I'm a goofy EE, its all transitors, 1s and 0s to me.

rcmolloy 28-01-2014 14:24
Re: pic: How 2415 is rolling for 2014
 
Second the question that Michael brought up on the side rails.

I'm curious to see how the bearings hold up due to the the larger cantilevered lever arm they are sitting on. If you already calculated out the reactionary forces on the bearings due to the robot weight and deemed it good then disregard!

Quote:
Originally Posted by Richard Wallace (Post 1333719)
In a contest between a stationary digital sidecar and a (suddenly loose) length of #25 chain moving at >12 fps, which one wins?
Chain guards seem to be a plausible way to help the DSC out :)

Arpan 28-01-2014 14:45
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by wireties (Post 1333721)
Ditto - looks great!

Are you nervous having the cantilevered portion of the shaft longer than is WCD-typical? And now both forces from the wheels and the chain are working on the extended (from the frame) portion of the shaft.

Sorry if this is a silly question - I'm a goofy EE, its all transitors, 1s and 0s to me.
On our team, we're running a similar setup with 15mm belts. Our FEA suggested that our shafts would be more than fine.

JeffersonMartin 28-01-2014 15:01
Re: pic: How 2415 is rolling for 2014
 
Still see that vacuum sneaking into the photo.

Kellen Hill 28-01-2014 15:04
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by JeffersonMartin (Post 1333737)
Still see that vacuum sneaking into he photo.
That's the part I'm looking forward to seeing more of.

sdcantrell56 28-01-2014 15:39
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by rcmolloy (Post 1333722)
Second the question that Michael brought up on the side rails.

I'm curious to see how the bearings hold up due to the the larger cantilevered lever arm they are sitting on. If you already calculated out the reactionary forces on the bearings due to the robot weight and deemed it good then disregard!



Chain guards seem to be a plausible way to help the DSC out :)
We ran the calculations. The axles will be perfectly fine.

Chain on the outside is to free up space on the inside of the robot and easier servicing. We have run belt the past 4 years and so far I am much much happier going back to chain, particularly with the versa bearing blocks and cams

magnets 28-01-2014 15:53
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by wireties (Post 1333721)
Ditto - looks great!

Are you nervous having the cantilevered portion of the shaft longer than is WCD-typical? And now both forces from the wheels and the chain are working on the extended (from the frame) portion of the shaft.

Sorry if this is a silly question - I'm a goofy EE, its all transitors, 1s and 0s to me.
You're absolutely right. This cantilevered shaft is weaker than a normal WCD shaft because it's longer and isn't loaded on both sides. However, I'm pretty sure it's strong enough, especially with no bumps or towers to wreck your frame this year.

Good choice with chains- I think they're better than belts.

Akash Rastogi 28-01-2014 22:01
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by sdcantrell56 (Post 1333761)
We ran the calculations. The axles will be perfectly fine.

Chain on the outside is to free up space on the inside of the robot and easier servicing. We have run belt the past 4 years and so far I am much much happier going back to chain, particularly with the versa bearing blocks and cams
What's the length of the slot you made for tensioning the VersaBlock? Just wondering.

Looking really nice!

Andrew Y. 28-01-2014 22:39
Re: pic: How 2415 is rolling for 2014
 
Sean demanded the chain be cleaned in a ultrasonic bath so his hipster clothes wont get dirty. Its the only reason we ever did belt.

Andrew Schreiber 28-01-2014 23:01
Re: pic: How 2415 is rolling for 2014
 
Quote:
Originally Posted by Andrew Y. (Post 1333978)
Sean demanded the chain be cleaned in a ultrasonic bath so his hipster clothes wont get dirty. Its the only reason we ever did belt.
You know, the worst part is I'm not so sure this is a joke.


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