Go to Post The only thing a team needs to survive is people who want it to survive. - Ryan Foley [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
 
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 29-01-2017, 11:12
Greg Hainsworth's Avatar
Greg Hainsworth Greg Hainsworth is offline
Mentor
FRC #5938 (Razor Steel Robotics)
Team Role: Mentor
 
Join Date: Mar 2016
Rookie Year: 2016
Location: Dover DE
Posts: 37
Greg Hainsworth is on a distinguished road
Re: Tubing for ball intake

make sure your tubing stays within the volume box. We considered this too but expect the judges to extend the tubing to it's maximum length and call that the limit of the robot volume.

Good Luck.
Reply With Quote
  #2   Spotlight this post!  
Unread 29-01-2017, 20:59
RoboChair's Avatar
RoboChair RoboChair is offline
He who fixes with hammers #tsimfd
AKA: Devin Castellucci
FRC #1678 (Citrus Circuits and 5458 Digital Minds)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2005
Location: Davis, CA
Posts: 715
RoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond repute
Re: Tubing for ball intake

1.25" diameter aluminum 6061-T6 with a 1/16" wall thickness sometimes with surgical tubing on the outside(we add) is what 1678 runs for all our intake and ball stuff.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #3   Spotlight this post!  
Unread 30-01-2017, 09:34
clydefrog88's Avatar
clydefrog88 clydefrog88 is offline
Sam
FRC #4087 (Falcon Robotics)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2005
Location: New Orleans, LA
Posts: 52
clydefrog88 is a jewel in the roughclydefrog88 is a jewel in the roughclydefrog88 is a jewel in the roughclydefrog88 is a jewel in the rough
Re: Tubing for ball intake

Quote:
Originally Posted by RoboChair View Post
1.25" diameter aluminum 6061-T6 with a 1/16" wall thickness sometimes with surgical tubing on the outside(we add) is what 1678 runs for all our intake and ball stuff.
Where do you guys source surgical tubing of that size? And how would you recommend pulling it onto a roller tube? Alcohol as a lubricant?

Thanks!
Reply With Quote
  #4   Spotlight this post!  
Unread 30-01-2017, 09:59
6101 Robert 6101 Robert is offline
Registered User
FRC #6101 (The Strange Quarks)
Team Role: Leadership
 
Join Date: Jun 2016
Rookie Year: 2016
Location: Ypsilanti, Michigan
Posts: 12
6101 Robert is an unknown quantity at this point
Re: Tubing for ball intake

What about orange urethane cord? Would that work well too?

We haven't built any intakes with urethane cord yet, but we have used in the past. From my experiences with it, it seems like it would work. It's also cheap and easy to build with.
Reply With Quote
  #5   Spotlight this post!  
Unread 30-01-2017, 10:11
clydefrog88's Avatar
clydefrog88 clydefrog88 is offline
Sam
FRC #4087 (Falcon Robotics)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2005
Location: New Orleans, LA
Posts: 52
clydefrog88 is a jewel in the roughclydefrog88 is a jewel in the roughclydefrog88 is a jewel in the roughclydefrog88 is a jewel in the rough
Re: Tubing for ball intake

To share our recent experience with the McMaster 1" belt:

http://www.harborfreight.com/130-wat...ife-60313.html

This hot knife along with some clamped angle iron works wonders in joining the flat belts quickly. It's probably overkill for the solid core round tubing.

Also, I've seen a ~10% length reduction recommended for proper tension. This may be feasible for the small diameter round tubing, but you might find that stretching the flat belts that much makes intake assembly, well, difficult. I'm finding that we have sufficient belt tension by simply ignoring roller diameters.
__________________
FRC 364 - Mechanical, Operator, Driver (2005-2008)
FRC Machine Judge (2015,2016)
FRC 4087 - Engineering Mentor (2016-?)
Reply With Quote
  #6   Spotlight this post!  
Unread 30-01-2017, 10:14
Mike Marandola Mike Marandola is offline
Lead Bumper Mentor
AKA: Mike Marandola
FRC #0316 (Lunatecs)
Team Role: Mentor
 
Join Date: Jan 2009
Rookie Year: 2008
Location: Pedricktown, NJ
Posts: 666
Mike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond repute
Re: Tubing for ball intake

Is it just me or are people talking about 3 different things? The structural tube for a roller, gripping material to put on the roller, and urethane belting.
__________________

2015 - Pioneer Valley District Finalists/Upper Darby District Finalists/MAR District Championship #1 Seed and Winners with 225 and 203
2014 - Lenape Seneca District Winners/Chestnut Hill District Winners
2013 - Lenape Seneca District Winners/Chestnut Hill District Finalists
2011 - Philadelphia Regional Finalists
2009 - Finger Lakes Regional Finalists

Reply With Quote
  #7   Spotlight this post!  
Unread 30-01-2017, 13:20
RoboChair's Avatar
RoboChair RoboChair is offline
He who fixes with hammers #tsimfd
AKA: Devin Castellucci
FRC #1678 (Citrus Circuits and 5458 Digital Minds)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2005
Location: Davis, CA
Posts: 715
RoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond repute
Re: Tubing for ball intake

Quote:
Originally Posted by Mike Marandola View Post
Is it just me or are people talking about 3 different things? The structural tube for a roller, gripping material to put on the roller, and urethane belting.
No, there is definitely 3 different conversations in this thread.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #8   Spotlight this post!  
Unread 30-01-2017, 13:21
Skyehawk's Avatar
Skyehawk Skyehawk is offline
Nuts N' Bolts
AKA: Skye Leake
FRC #0876 (Thunder Robotics)
Team Role: Mentor
 
Join Date: Nov 2012
Rookie Year: 2011
Location: Northwood, ND
Posts: 273
Skyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to all
Re: Tubing for ball intake

Quote:
Originally Posted by Mike Marandola View Post
Is it just me or are people talking about 3 different things? The structural tube for a roller, gripping material to put on the roller, and urethane belting.
Yup, there are 3 different answers for an ambiguous question here...
__________________
My time in FIRST has made me a better person, frankly I don't know where I'd be without it.



2011 Lake Superior Regional Champs (Thanks 2512 & 3747)
2015 Central Illinois Regional Engineering Inspiration Award recipients
2016 Central Illinois Regional Champs (Thanks 2481 & 2220)
Reply With Quote
  #9   Spotlight this post!  
Unread 30-01-2017, 13:19
RoboChair's Avatar
RoboChair RoboChair is offline
He who fixes with hammers #tsimfd
AKA: Devin Castellucci
FRC #1678 (Citrus Circuits and 5458 Digital Minds)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2005
Location: Davis, CA
Posts: 715
RoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond repute
Re: Tubing for ball intake

Quote:
Originally Posted by clydefrog88 View Post
Where do you guys source surgical tubing of that size? And how would you recommend pulling it onto a roller tube? Alcohol as a lubricant?

Thanks!
McMaster Carr specifically we use https://www.mcmaster.com/#5234k91/=1650h8o for our 1.25" OD rollers this year. Yes that is a 0.25" interference.

You cannot pull it on at all. You will need to use compressed air and someone with a reasonably strong arm. Zip-tie/safety-wire one end of the tubing to an air nozzle so that you get a good seal. Next you must plug off your aluminum roller so that air can't flow through it. one person controls air flow, the other holds the tube and tubing and does the hard part. turn on the air and begin pushing the latex on to the aluminum, DO NOT FOR ANY REASON clamp your hand down on the aluminum tube underneath the latex(your hand should never be that far up anyway) or you will get a 100psi balloon animal with a desire to pop. Alternate the airflow on and off to let you move your grip lower on the latex.

If you do not fully understand I can make a youtube video tutorial on Wednesday.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #10   Spotlight this post!  
Unread 30-01-2017, 13:47
Skyehawk's Avatar
Skyehawk Skyehawk is offline
Nuts N' Bolts
AKA: Skye Leake
FRC #0876 (Thunder Robotics)
Team Role: Mentor
 
Join Date: Nov 2012
Rookie Year: 2011
Location: Northwood, ND
Posts: 273
Skyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to all
Re: Tubing for ball intake

Quote:
Originally Posted by RoboChair View Post
McMaster Carr specifically we use https://www.mcmaster.com/#5234k91/=1650h8o for our 1.25" OD rollers this year. Yes that is a 0.25" interference.

You cannot pull it on at all. You will need to use compressed air and someone with a reasonably strong arm.
...

If you do not fully understand I can make a youtube video tutorial on Wednesday.
A tutorial would be awesome! Have you tried soapy water/ Murphy's Soap? I know this may not be an ideal solution due to residual soap left after application, but it may just work...

Also I just ordered the components to try this out for myself... should be interesting.
__________________
My time in FIRST has made me a better person, frankly I don't know where I'd be without it.



2011 Lake Superior Regional Champs (Thanks 2512 & 3747)
2015 Central Illinois Regional Engineering Inspiration Award recipients
2016 Central Illinois Regional Champs (Thanks 2481 & 2220)

Last edited by Skyehawk : 30-01-2017 at 13:52.
Reply With Quote
  #11   Spotlight this post!  
Unread 30-01-2017, 13:57
RoboChair's Avatar
RoboChair RoboChair is offline
He who fixes with hammers #tsimfd
AKA: Devin Castellucci
FRC #1678 (Citrus Circuits and 5458 Digital Minds)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2005
Location: Davis, CA
Posts: 715
RoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond repute
Re: Tubing for ball intake

Quote:
Originally Posted by Skyehawk View Post
A tutorial would be awesome! Have you tried soapy water/ Murphy's Soap? I know this may not be an ideal solution due to residual soap left after application, but it may just work...

Also I just ordered the components to try this out for myself... should be interesting.
I feel soap would actually be counter productive, it would make it easier to slide off quickly if you mess up the order. But seeing as the latex is literally floating on air there isn't much that the soap would do.

I will post a reminder in our team slack to put the video together during our next meeting on Wed.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #12   Spotlight this post!  
Unread 30-01-2017, 14:04
Skyehawk's Avatar
Skyehawk Skyehawk is offline
Nuts N' Bolts
AKA: Skye Leake
FRC #0876 (Thunder Robotics)
Team Role: Mentor
 
Join Date: Nov 2012
Rookie Year: 2011
Location: Northwood, ND
Posts: 273
Skyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to allSkyehawk is a name known to all
Re: Tubing for ball intake

Quote:
Originally Posted by RoboChair View Post
I feel soap would actually be counter productive, it would make it easier to slide off quickly if you mess up the order. But seeing as the latex is literally floating on air there isn't much that the soap would do.

I will post a reminder in our team slack to put the video together during our next meeting on Wed.
I was more referring to a non-compressed air approach, however, 250 thou is a lot to overcome for an interferance fit, even with an 'easily' yielding material. Probably not possible.

How do you adjust the ends of the rollers? i.e. move the last inch of the latex up to your mark on the Al tubing?
__________________
My time in FIRST has made me a better person, frankly I don't know where I'd be without it.



2011 Lake Superior Regional Champs (Thanks 2512 & 3747)
2015 Central Illinois Regional Engineering Inspiration Award recipients
2016 Central Illinois Regional Champs (Thanks 2481 & 2220)
Reply With Quote
  #13   Spotlight this post!  
Unread 30-01-2017, 14:08
RoboChair's Avatar
RoboChair RoboChair is offline
He who fixes with hammers #tsimfd
AKA: Devin Castellucci
FRC #1678 (Citrus Circuits and 5458 Digital Minds)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2005
Location: Davis, CA
Posts: 715
RoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond reputeRoboChair has a reputation beyond repute
Re: Tubing for ball intake

Quote:
Originally Posted by Skyehawk View Post
I was more referring to a non-compressed air approach, however, 250 thou is a lot to overcome for an interferance fit, even with an 'easily' yielding material. Probably not possible.

How do you adjust the ends of the rollers? i.e. move the last inch of the latex up to your mark on the Al tubing?
Razor blade. If I want a 24" roller, I NEED a piece at least 28" long and cut to the 24" mark when I float the end to the right position. I will also demonstrate how we make segmented rollers with multiple pieces on one length of roller.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #14   Spotlight this post!  
Unread 31-01-2017, 07:49
1493kd's Avatar
1493kd 1493kd is offline
kd
FRC #1493 (FALCONS)
Team Role: Teacher
 
Join Date: Mar 2006
Rookie Year: 2005
Location: Albany, NY
Posts: 149
1493kd will become famous soon enough
Re: Tubing for ball intake

Quote:
Originally Posted by RoboChair View Post
I will post a reminder in our team slack to put the video together during our next meeting on Wed.
We would appreciate that video very much as we are putting our intake together this week with the same set up for the first time.
Reply With Quote
  #15   Spotlight this post!  
Unread 31-01-2017, 12:34
chapman1's Avatar
chapman1 chapman1 is offline
Registered User
FRC #3688 (Suttons Bay Norsemen Robotics)
Team Role: Coach
 
Join Date: Mar 2011
Rookie Year: 2011
Location: Suttons Bay
Posts: 86
chapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond reputechapman1 has a reputation beyond repute
Re: Tubing for ball intake

Quote:
Originally Posted by RoboChair View Post
I feel soap would actually be counter productive, it would make it easier to slide off quickly if you mess up the order. But seeing as the latex is literally floating on air there isn't much that the soap would do.

I will post a reminder in our team slack to put the video together during our next meeting on Wed.
Another possibility for the "slide it on without air" option is to use hairspray. This is a common method used when installing motorcycle hand grips. Slippery when wet, sticky when dry.

The "sticky when dry" caveat, however, should not be ignored. A 20" wide roller has only the two ends of the rubber tubing to facilitate evaporation. Four sections, each 5" wide, however, might allow for fairly rapid evaporation of the hairspray...
__________________
Older, but still somewhat coherent.
Reply With Quote
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 05:15.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi