Go to Post I respect what you have to say and I ask that you do the same for me. - Andrew Schreiber [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 02-03-2017, 04:54 PM
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: 866
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
Polycord and Intake Rollers

I made the video described in this thread here.

https://www.youtube.com/watch?v=fYKsIe-yMrA

I show you how we weld our round polyurethane belts and how we make our intake rollers using large diameter latex tubing over aluminum tubes.

I also have a good post from last year about our round belts HERE
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #2   Spotlight this post!  
Unread 02-03-2017, 06:40 PM
1493kd's Avatar
1493kd 1493kd is offline
kd
AKA: Brent
FRC #1493 (FALCONS)
Team Role: Teacher
 
Join Date: Mar 2006
Rookie Year: 2005
Location: Albany, NY
Posts: 158
1493kd has a spectacular aura about1493kd has a spectacular aura about
Re: Polycord and Intake Rollers

Thank you for making these videos, we tried putting the tube over our aluminum tube this week and well it didnt go so well......

This will make it much easier.

What are you using to cap the one end of the tube? Any suggestions.
Thank you
Reply With Quote
  #3   Spotlight this post!  
Unread 02-03-2017, 06:53 PM
apm4242 apm4242 is offline
Registered User
FRC #4242
 
Join Date: Jan 2013
Location: United States
Posts: 135
apm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant future
Re: Polycord and Intake Rollers

Thanks for posting. If the surgical tubing is segmented, is it thick enough to create channels for the polycord to sit in?
Reply With Quote
  #4   Spotlight this post!  
Unread 02-03-2017, 06:58 PM
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: 866
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: Polycord and Intake Rollers

Quote:
Originally Posted by 1493kd View Post
Thank you for making these videos, we tried putting the tube over our aluminum tube this week and well it didnt go so well......

This will make it much easier.

What are you using to cap the one end of the tube? Any suggestions.
Thank you
Anything that will block air flow and take the pressure. We use inserted hubs. a chunk of wood wedged in would do it fine however. When all else fail, duct tape?

Quote:
Originally Posted by apm4242 View Post
Thanks for posting. If the surgical tubing is segmented, is it thick enough to create channels for the polycord to sit in?
Probably will work, YMMV. It will need to be the thick wall stuff. You can tape an O-ring and do flat belt between the gaps, which is what we did last year.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #5   Spotlight this post!  
Unread 02-04-2017, 12:37 AM
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: 401
Skyehawk is a splendid one to beholdSkyehawk is a splendid one to beholdSkyehawk is a splendid one to beholdSkyehawk is a splendid one to beholdSkyehawk is a splendid one to beholdSkyehawk is a splendid one to beholdSkyehawk is a splendid one to behold
Re: Polycord and Intake Rollers

Quote:
Originally Posted by 1493kd View Post
Thank you for making these videos, we tried putting the tube over our aluminum tube this week and well it didnt go so well......

This will make it much easier.

What are you using to cap the one end of the tube? Any suggestions.
Thank you
Try the rubber stoppers for flasks in chemistry. Next try a champagne cork, (probably not something lying around at school ) that should be about 1.125" in diameter.

Thanks for the video Devin!
__________________
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)
2017 Northern Lights Regional Chairmans Award Recipients
Reply With Quote
  #6   Spotlight this post!  
Unread 02-06-2017, 11:20 AM
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: 866
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: Polycord and Intake Rollers

Anyone else have any questions about how we do any of these things? Or if you are looking for any advice.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #7   Spotlight this post!  
Unread 02-06-2017, 05:39 PM
brunoUC's Avatar
brunoUC brunoUC is offline
Registered User
AKA: Bruno Toso
FRC #1156 (Under Control)
Team Role: Programmer
 
Join Date: Jan 2012
Rookie Year: 2011
Location: Novo Hamburgo, RS, Brasil
Posts: 23
brunoUC will become famous soon enoughbrunoUC will become famous soon enough
Re: Polycord and Intake Rollers

Thanks very much! we just tried it, and it worked really well.
Attached Thumbnails
Click image for larger version

Name:	IMG_20170206_212300000 (2).jpg
Views:	321
Size:	552.9 KB
ID:	21735  
__________________



1156 Under Control
2015 SBPLI Long Island Chairman's Award Winner
2015 Curie Division quarter-finalist
2014 & 2016 Long Island Regional Winner
Reply With Quote
  #8   Spotlight this post!  
Unread 02-06-2017, 10:02 PM
1493kd's Avatar
1493kd 1493kd is offline
kd
AKA: Brent
FRC #1493 (FALCONS)
Team Role: Teacher
 
Join Date: Mar 2006
Rookie Year: 2005
Location: Albany, NY
Posts: 158
1493kd has a spectacular aura about1493kd has a spectacular aura about
Re: Polycord and Intake Rollers

Thank you so much for the video. It took us a few attempts and once we got it figured out rollers went on super quick.

For anyone doing this the first time.
1. You must have an airtight connection between the air compressor hose and the rubber tube. We zip tied and used a hose clamp to stop any leaks from that end.
2. Duct tape over the alum tube worked just fine to plug the end
3. Have people with a good amount of muscle performing this take, it takes 2, sometimes 3 people to make it all work.
Reply With Quote
  #9   Spotlight this post!  
Unread 02-08-2017, 01:26 AM
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: 866
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: Polycord and Intake Rollers

I'm glad that this has helped a number of teams! Anything else teams out there would like advice on to help out their build seasons? I can't share what we are doing for our robot, but I can tell you about how we do some stuff in general no problem.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #10   Spotlight this post!  
Unread 02-09-2017, 07:22 AM
apm4242 apm4242 is offline
Registered User
FRC #4242
 
Join Date: Jan 2013
Location: United States
Posts: 135
apm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant future
Re: Polycord and Intake Rollers

Quote:
Originally Posted by RoboChair View Post
You can tape an O-ring and do flat belt between the gaps
Thanks for the help! I had a few questions regarding flat belts -

What kind of o-ring would you recommend? Should it be undersized to stretch over the roller/pulley?

This year, we're planning on using flat belts to transfer torque between shafts of our intake in both the traditional and crossed belt (like an infinity symbol) configuration. Have you ever used flat belts as a primary means to transfer torque? If so, any advice to share?
Reply With Quote
  #11   Spotlight this post!  
Unread 02-09-2017, 07:35 AM
Andrew Schreiber Andrew Schreiber is offline
It will be up to the LRI...
no team
 
Join Date: Jan 2005
Rookie Year: 2000
Location: Misplaced Michigander
Posts: 4,285
Andrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond repute
Re: Polycord and Intake Rollers

Quote:
Originally Posted by RoboChair View Post
I made the video described in this thread here.

https://www.youtube.com/watch?v=fYKsIe-yMrA

I show you how we weld our round polyurethane belts and how we make our intake rollers using large diameter latex tubing over aluminum tubes.

I also have a good post from last year about our round belts HERE
Solid, any suggested ID/ODs for the surgical tubing? All the ones I looked at were rather pricey per foot so we ended up trying bike tubes with good success. I have a hunch the surgical tubing would be both grippier and more durable.

For anyone curious - the bike tubes slide on reasonably well without air because you can scrunch them up and straighten them out. Takes a lot less strength to put them on. Just be sure to wash them with soap and water first because they ship with talc on them which will cause them to spin on your roller.
__________________




.
Reply With Quote
  #12   Spotlight this post!  
Unread 02-14-2017, 12:40 PM
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: 866
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: Polycord and Intake Rollers

Quote:
Originally Posted by apm4242 View Post
Thanks for the help! I had a few questions regarding flat belts -

What kind of o-ring would you recommend? Should it be undersized to stretch over the roller/pulley?

This year, we're planning on using flat belts to transfer torque between shafts of our intake in both the traditional and crossed belt (like an infinity symbol) configuration. Have you ever used flat belts as a primary means to transfer torque? If so, any advice to share?
It doesn't really matter that much, but it should not be loose.

Flat belt work great at torque transfer.
__________________

12 Years and counting! Over a third of my life has been spent with FRC.
Reply With Quote
  #13   Spotlight this post!  
Unread 02-14-2017, 12:42 PM
Chris is me's Avatar
Chris is me Chris is me is online now
no bag, vex only, final destination
AKA: Pinecone
FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks)
Team Role: Mentor
 
Join Date: Dec 2008
Rookie Year: 2006
Location: Philadelphia, PA
Posts: 8,057
Chris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond repute
Send a message via AIM to Chris is me
Re: Polycord and Intake Rollers

Quote:
Originally Posted by apm4242 View Post
What kind of o-ring would you recommend? Should it be undersized to stretch over the roller/pulley?
Almost anything will work here. We picked an O-ring that is only slightly undersize, and the only issue with it is that it does not always sit "flat" on the tube. Not really a problem, just looks a little uglier. No matter what you use, tape it down with electrical tape.
__________________
Moved to Philadelphia - Now Accepting Free Agent Contract Offers
Mentor / Drive Coach: 228 (2016-2017) - 2017 Waterbury SFs (with 195, 558) & Industrial Design, 2017 Hartford SFs (with 5422, 236)
2016 Waterbury SFs (with 3314, 3719), 2016 Rhode Island #2 Seed / Winners (with 1058, 6153), 2016 Carver QFs (with 503, 359, 4607)
Consultant Person: 2170 (2017) - Waterbury Judge's Award, Hartford Creativity Award
College Mentor: 2791 (2010-2015) Build Photos - 2015 TVR Quality, 2015 FLR Industrial Design,
2014 FLR Quality / SFs (with 341, 4930), 2013 BAE Quality, 2013 WPI Regional #1 Seed / Excellence in Engineering / Finalists (with 20, 3182),
2012 BAE Imagery / Finalists (with 1519, 885), 2012 CT Xerox Creativity / SFs (with 2168, 118)
Student: 1714 (2009) - 2009 MN 10K Lakes Regional Winners (with 2826, 2470)
Reply With Quote
  #14   Spotlight this post!  
Unread 02-14-2017, 01:19 PM
apm4242 apm4242 is offline
Registered User
FRC #4242
 
Join Date: Jan 2013
Location: United States
Posts: 135
apm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant futureapm4242 has a brilliant future
Re: Polycord and Intake Rollers

Quote:
Originally Posted by Chris is me View Post
Almost anything will work here.
Here's our setup: The ~0.75" wide ~1.2" diameter pulleys were made out of some colson live hubs from vexpro by cutting them in half and turning them down on a lathe. The flat belts are 0.5" wide.

We tried a few wraps of just ~0.25-0.375" wide electrical tape on the smooth metal pulley. It worked better than I expected. The belt tracked even better at higher speeds.

Would you recommend using an O-ring over using just electrical tape? I feel like a rubber band with some standard width electrical tape over it would also work. Thoughts?

Thanks for the help!
Reply With Quote
  #15   Spotlight this post!  
Unread 02-14-2017, 01:26 PM
Chris is me's Avatar
Chris is me Chris is me is online now
no bag, vex only, final destination
AKA: Pinecone
FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks)
Team Role: Mentor
 
Join Date: Dec 2008
Rookie Year: 2006
Location: Philadelphia, PA
Posts: 8,057
Chris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond repute
Send a message via AIM to Chris is me
Re: Polycord and Intake Rollers

Quote:
Originally Posted by apm4242 View Post
Here's our setup: The ~0.75" wide ~1.2" diameter pulleys were made out of some colson live hubs from vexpro by cutting them in half and turning them down on a lathe. The flat belts are 0.5" wide.

We tried a few wraps of just ~0.25-0.375" wide electrical tape on the smooth metal pulley. It worked better than I expected. The belt tracked even better at higher speeds.

Would you recommend using an O-ring over using just electrical tape? I feel like a rubber band with some standard width electrical tape over it would also work. Thoughts?

Thanks for the help!
The only thing I've found is that the thinner the crown of the pulley, the better it tracks. And to some extent, the greater the difference between the crown OD and the pulley ID, the better it tracks. An O-ring is just a super easy way to achieve this. A rubber band would do probably just as well, especially doubled up. Even a piece of string of sufficient thickness, taped down, will do it. It's really hard to get this wrong.
__________________
Moved to Philadelphia - Now Accepting Free Agent Contract Offers
Mentor / Drive Coach: 228 (2016-2017) - 2017 Waterbury SFs (with 195, 558) & Industrial Design, 2017 Hartford SFs (with 5422, 236)
2016 Waterbury SFs (with 3314, 3719), 2016 Rhode Island #2 Seed / Winners (with 1058, 6153), 2016 Carver QFs (with 503, 359, 4607)
Consultant Person: 2170 (2017) - Waterbury Judge's Award, Hartford Creativity Award
College Mentor: 2791 (2010-2015) Build Photos - 2015 TVR Quality, 2015 FLR Industrial Design,
2014 FLR Quality / SFs (with 341, 4930), 2013 BAE Quality, 2013 WPI Regional #1 Seed / Excellence in Engineering / Finalists (with 20, 3182),
2012 BAE Imagery / Finalists (with 1519, 885), 2012 CT Xerox Creativity / SFs (with 2168, 118)
Student: 1714 (2009) - 2009 MN 10K Lakes Regional Winners (with 2826, 2470)
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 08:21 AM.

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