Go to Post Kyle from team 45 said "Dude, I still have 2 years left in FIRST ahahaha.." My response to that was... "Kyle, I have till the day I die." - Arefin Bari [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

 
Closed Thread
Thread Tools Rating: Thread Rating: 3 votes, 5.00 average. Display Modes
  #16   Spotlight this post!  
Unread 03-05-2014, 01:03
EricH's Avatar
EricH EricH is offline
New year, new team
FRC #1197 (Torbots)
Team Role: Engineer
 
Join Date: Jan 2005
Rookie Year: 2003
Location: SoCal
Posts: 19,817
EricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond repute
Re: Custom Wheels

Quote:
Originally Posted by DjParaNoize- View Post
Has anyone tried using another material besides wedgetop or roughtop?
Blue Nitrile. That first picture in this thread shows some, though it's just about indistinguishable from the wheel. Lots of teams use that.
__________________
Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons

"Rockets are tricky..."--Elon Musk

  #17   Spotlight this post!  
Unread 03-05-2014, 01:36
DjParaNoize-'s Avatar
DjParaNoize- DjParaNoize- is offline
Registered User
no team
Team Role: Leadership
 
Join Date: Mar 2013
Rookie Year: 2012
Location: California
Posts: 55
DjParaNoize- is an unknown quantity at this point
Re: Custom Wheels

Interesting, Most wheels tend to wear out from my view. Our team uses custom wheels with Ployurethane and they've got perfect grip and don't tend to wear easily.

Polyurethane is a great material; we did a Cinco de mayo parade with the robot last year on a hot day and walked on the streets and our wheels didn't wear at all. We'll Be doing the parade this year again ( Tomorrow )
  #18   Spotlight this post!  
Unread 03-05-2014, 11:21
Mike Marandola Mike Marandola is online now
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: Custom Wheels

Quote:
Originally Posted by avanboekel View Post
Any details on how these were made? I assume you had to create some sort of mold, but how was this done?
I am not going to go into too much detail because I will make a more detailed thread when they are complete.

To make the two part mold I started off by building the clay half way up the master wheel. http://i.imgur.com/Y1UbrUj.jpg After a good coat of mold release I poured half of the silicone in. Those dimples are called keys, they keep the two halves aligned.

After it cured I took the clay and master wheel out, cleaned up the mold, and put the wheel back in. http://i.imgur.com/TyhgwAN.jpg The rest of the silicone was poured in and 20 hours later it was done. This was the finished mold http://i.imgur.com/FmC5ng8.jpg It didn't turn out very well because I rushed through the clay part.
__________________

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

  #19   Spotlight this post!  
Unread 03-05-2014, 11:25
Mike Marandola Mike Marandola is online now
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: Custom Wheels

Quote:
Originally Posted by DjParaNoize- View Post
Has anyone tried using another material besides wedgetop or roughtop?
There is also this stuff http://www.andymark.com/product-p/am-2611.htm

I felt it on 1218's intake roller and it seemed really grippy and soft. I am not sure how well it would hold up on wheels.


Quote:
Originally Posted by BBray_T1296 View Post
Do you just tread each half and attach them with 2 seams in the tread? Pretty clever for those -hard to replace drivetrains
I saw these at champs and they were awesome. Here they are with the tread attached. http://i.imgur.com/3W0z2Ik.jpg
__________________

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


Last edited by Mike Marandola : 03-05-2014 at 11:30.
  #20   Spotlight this post!  
Unread 03-05-2014, 14:11
T^2 T^2 is offline
Registered User
FRC #5499
Team Role: Mentor
 
Join Date: Jan 2013
Rookie Year: 2011
Location: Berkeley
Posts: 219
T^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond reputeT^2 has a reputation beyond repute
Re: Custom Wheels

Live-axle version of 971's wheel. Tread is blue nitrile attached with a zip-tie. If your team has the resources to do this, I highly recommend it; not having to use rivets is excellent.
Attached Thumbnails
Click image for larger version

Name:	Wheel.jpg
Views:	315
Size:	25.6 KB
ID:	16969  
  #21   Spotlight this post!  
Unread 03-05-2014, 19:14
Dunngeon Dunngeon is offline
Pumped
AKA: Ryan
FRC #0973 (Greybots)
Team Role: College Student
 
Join Date: Mar 2014
Rookie Year: 2012
Location: Cal Poly San Luis Obispo
Posts: 299
Dunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond repute
Re: Custom Wheels

Quote:
Originally Posted by asid61 View Post
Did you have any issues with the flat on the top/ bottom of wheels? How exactly do you replace the tread? Is this on a live axle or dead axle?

Wicked cool design BTW.

EDIT: didn't read whole post. Dead axle then.
Actually it's a live axle design, the drive sprockets are mounted on the hex shaft as well, this way we don't have to design a way to attach sprockets to the wheel.

The tread is put on in halfs, so that we can split the wheel off the axle. The tops and bottom of the wheels induce some vibration, but it's not too bad.


If you want a comparison, watch

this video from PNW champs (Before 6wd)

https://www.youtube.com/watch?v=AlG1JUmWnlk

Then this video from CMP where the robot was full 6wd (Note that the mount for the Gopro changed, so there was some more vibration from that as well)

https://www.youtube.com/watch?v=QkKOhDXiRFY
__________________
(2015-?): 973
(2012-2015): 955
  #22   Spotlight this post!  
Unread 04-05-2014, 00:00
asid61's Avatar
asid61 asid61 is offline
Registered User
AKA: Anand Rajamani
FRC #0115 (MVRT)
Team Role: Mechanical
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Cupertino, CA
Posts: 2,226
asid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond repute
Re: Custom Wheels

Quote:
Originally Posted by Dunngeon View Post
Actually it's a live axle design, the drive sprockets are mounted on the hex shaft as well, this way we don't have to design a way to attach sprockets to the wheel.

The tread is put on in halfs, so that we can split the wheel off the axle. The tops and bottom of the wheels induce some vibration, but it's not too bad.


If you want a comparison, watch

this video from PNW champs (Before 6wd)

https://www.youtube.com/watch?v=AlG1JUmWnlk

Then this video from CMP where the robot was full 6wd (Note that the mount for the Gopro changed, so there was some more vibration from that as well)

https://www.youtube.com/watch?v=QkKOhDXiRFY
I was wondering how you put the tread back on. Once the tread is on, the wheel is one piece, right? Do you attach tread while on the axle?
  #23   Spotlight this post!  
Unread 04-05-2014, 13:04
Monochron's Avatar
Monochron Monochron is online now
Engineering Mentor
AKA: Brian O'Sullivan
FRC #4561 (TerrorBytes)
Team Role: Engineer
 
Join Date: Feb 2007
Rookie Year: 2002
Location: Research Triangle Park, NC
Posts: 916
Monochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond reputeMonochron has a reputation beyond repute
Re: Custom Wheels

Quote:
Originally Posted by Dunngeon View Post
If you want a comparison, watch

this video from PNW champs (Before 6wd)

https://www.youtube.com/watch?v=AlG1JUmWnlk

Then this video from CMP where the robot was full 6wd (Note that the mount for the Gopro changed, so there was some more vibration from that as well)

https://www.youtube.com/watch?v=QkKOhDXiRFY
It looks to me like the second video has you driving a lot more erratically. Is this just the extra vibration I am seeing or is that a result of the change in drivetrain? In the first video you seem to do a much better job of tearing across the field and making blocks and stops.
  #24   Spotlight this post!  
Unread 04-05-2014, 16:03
Dunngeon Dunngeon is offline
Pumped
AKA: Ryan
FRC #0973 (Greybots)
Team Role: College Student
 
Join Date: Mar 2014
Rookie Year: 2012
Location: Cal Poly San Luis Obispo
Posts: 299
Dunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond repute
Re: Custom Wheels

Quote:
Originally Posted by Monochron View Post
It looks to me like the second video has you driving a lot more erratically. Is this just the extra vibration I am seeing or is that a result of the change in drivetrain? In the first video you seem to do a much better job of tearing across the field and making blocks and stops.
The point I was trying to make with the videos was the side to side vibration, which wasn't as obvious before 6wd. As far as how our driver drove the robot, we had just been talked to about High Speed Ramming, so we were likely holding back a bit. The overall strategy was also different between those two matches, at PNW we were playing nearly straight defense except when finishing (which didn't happen due to defense) so the driver had a much clearer picture of what to do. Personally, I thought the PNW match had a lot of missed blocks, whereas at Champs it wasn't as bad.

Tearing across the field was actually better with 6wd, we had more acceleration and better control when turning the robot. The Omni's we had on the back two wheels at PNW were horrible because they would break loose and cause us to skid out of control.
__________________
(2015-?): 973
(2012-2015): 955
  #25   Spotlight this post!  
Unread 04-05-2014, 16:27
safiq10's Avatar
safiq10 safiq10 is offline
Registered User
FRC #2950 (DEVASTATORS)
Team Role: Mechanical
 
Join Date: Jan 2013
Rookie Year: 2009
Location: Waco tx
Posts: 528
safiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond reputesafiq10 has a reputation beyond repute
Re: Custom Wheels

Quote:
Originally Posted by DjParaNoize- View Post
Interesting, Most wheels tend to wear out from my view. Our team uses custom wheels with Ployurethane and they've got perfect grip and don't tend to wear easily.

Polyurethane is a great material; we did a Cinco de mayo parade with the robot last year on a hot day and walked on the streets and our wheels didn't wear at all. We'll Be doing the parade this year again ( Tomorrow )
How much did the entire process cost you?
__________________

2014 Dallas Semi-Finalist (Thanks 3847 & 231)
2014 OKC Semi-Finalist (Thanks 2341 & 2461)
  #26   Spotlight this post!  
Unread 04-05-2014, 17:44
DjParaNoize-'s Avatar
DjParaNoize- DjParaNoize- is offline
Registered User
no team
Team Role: Leadership
 
Join Date: Mar 2013
Rookie Year: 2012
Location: California
Posts: 55
DjParaNoize- is an unknown quantity at this point
Re: Custom Wheels

Quote:
Originally Posted by safiq10 View Post
How much did the entire process cost you?
From the calculations I made it would be about ~$10.75 Per complete Wheel

about $5.5 Per Rim and ~$5.25 Per thread.


These wheels we've made have been great because they are Durable, long lasting, great on the field, and cost efficient.

Last edited by DjParaNoize- : 04-05-2014 at 17:47.
  #27   Spotlight this post!  
Unread 04-05-2014, 22:06
Mike Marandola Mike Marandola is online now
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: Custom Wheels

Quote:
Originally Posted by DjParaNoize- View Post
From the calculations I made it would be about ~$10.75 Per complete Wheel

about $5.5 Per Rim and ~$5.25 Per thread.


These wheels we've made have been great because they are Durable, long lasting, great on the field, and cost efficient.
What kind of wheels are they? Machined with molded tread? Do you have a picture?
__________________

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

  #28   Spotlight this post!  
Unread 04-05-2014, 22:28
DjParaNoize-'s Avatar
DjParaNoize- DjParaNoize- is offline
Registered User
no team
Team Role: Leadership
 
Join Date: Mar 2013
Rookie Year: 2012
Location: California
Posts: 55
DjParaNoize- is an unknown quantity at this point
Re: Custom Wheels

Quote:
Originally Posted by Mike Marandola View Post
What kind of wheels are they? Machined with molded tread? Do you have a picture?
Here's a Picture from Last Year's ( 2013 )

This year's wheels we decided to get rid of the Bolt Hole and Just Hold or rims together with Snap rings on the Hex shaft and also drilled a hole on the center of the hex shafts to screw in a bolt with spacers.

I will upload pictures of our 2014 wheels soon.
  #29   Spotlight this post!  
Unread 04-05-2014, 22:39
Dunngeon Dunngeon is offline
Pumped
AKA: Ryan
FRC #0973 (Greybots)
Team Role: College Student
 
Join Date: Mar 2014
Rookie Year: 2012
Location: Cal Poly San Luis Obispo
Posts: 299
Dunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond reputeDunngeon has a reputation beyond repute
Re: Custom Wheels

Quote:
Originally Posted by DjParaNoize- View Post
*snip*

Here's a Picture from Last Year's ( 2013 )

This year's wheels we decided to get rid of the Bolt Hole and Just Hold or rims together with Snap rings on the Hex shaft and also drilled a hole on the center of the hex shafts to screw in a bolt with spacers.

I will upload pictures of our 2014 wheels soon.
How does the material you use work on carpet in relation to the other types of traction material?
__________________
(2015-?): 973
(2012-2015): 955
  #30   Spotlight this post!  
Unread 04-05-2014, 23:05
DjParaNoize-'s Avatar
DjParaNoize- DjParaNoize- is offline
Registered User
no team
Team Role: Leadership
 
Join Date: Mar 2013
Rookie Year: 2012
Location: California
Posts: 55
DjParaNoize- is an unknown quantity at this point
Re: Custom Wheels

Compared to other material I believe the material we use has great traction on the carpet
One of our mentors who gave us some history of the traction materials said that out of all materials wedgetop and roughtop were great for the carpet but wore out super easy; and while designing the wheel we wanted it to have great traction/grip on the carpet, easy thread replacement, cost efficent and YELLOW.
So far we haven't had to swap out threads our threads from last year are still good they just don't seem to wear out; im assuming these are good as wedge/roughtops/Nitrile but very long lasting
Closed Thread


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 14:51.

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