Go to Post Team 1114 does not design or build ROBOTS. They build AWESOME. - DonRotolo [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra 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 01-02-2017, 14:42
Michael Corsetto's Avatar
Michael Corsetto Michael Corsetto is offline
Breathe in... Breathe out...
FRC #1678 (Citrus Circuits)
Team Role: Mentor
 
Join Date: May 2004
Rookie Year: 2002
Location: Davis, CA
Posts: 1,143
Michael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond reputeMichael Corsetto has a reputation beyond repute
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Allen,

Really cool bot, love what your team is doing with the open build/blog. Seems like a great learning experience for your team.

Whats the process for scoring the gear once in the gear holder?

Great work as always,

-Mike
__________________
Team 1678: Citrus Circuits - Lead Technical Mentor, Drive Coach **Like Us On Facebook!**
Reply With Quote
  #2   Spotlight this post!  
Unread 01-02-2017, 14:45
notmattlythgoe's Avatar
notmattlythgoe notmattlythgoe is offline
Flywheel Police
AKA: Matthew Lythgoe
FRC #2363 (Triple Helix)
Team Role: Mentor
 
Join Date: Feb 2010
Rookie Year: 2009
Location: Newport News, VA
Posts: 1,729
notmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond reputenotmattlythgoe has a reputation beyond repute
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by Michael Corsetto View Post
Allen,

Really cool bot, love what your team is doing with the open build/blog. Seems like a great learning experience for your team.

Whats the process for scoring the gear once in the gear holder?

Great work as always,

-Mike
They talk about some really good details of the gear intake here in the video.
Reply With Quote
  #3   Spotlight this post!  
Unread 01-02-2017, 14:56
AllenGregoryIV's Avatar
AllenGregoryIV AllenGregoryIV is offline
Engineering Coach
AKA: Allen "JAG" Gregory
FRC #3847 (Spectrum)
Team Role: Coach
 
Join Date: Jul 2008
Rookie Year: 2003
Location: Texas
Posts: 2,570
AllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond reputeAllenGregoryIV has a reputation beyond repute
Send a message via AIM to AllenGregoryIV
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by Michael Corsetto View Post
Allen,

Really cool bot, love what your team is doing with the open build/blog. Seems like a great learning experience for your team.

Whats the process for scoring the gear once in the gear holder?

Great work as always,

-Mike
In our testing it hasn't been difficult to deliver the gear out of the intake by just reversing the roller, lowering the arm, and driving backwards once the spring has pierced the gear. We were hoping for a cleaner release but couldn't get the gemotry of our first system to a point we thought it would be robust enough for the whole season. We haven't tested this geometry on a rolling chassis yet and that will be one of the first things we do when parts come in next week.

I'd assume we will be iterating on the drop off portion all season to make it as fast as possible without compromising it's pickup speed and ability to securely hold the gear during high speed collisions.
__________________

Team 647 | Cyber Wolf Corps | Alumni | 2003-2006 | Shoemaker HS
Team 2587 | DiscoBots | Mentor | 2008-2011 | Rice University / Houston Food Bank
Team 3847 | Spectrum | Coach | 2012-20... | St Agnes Academy
LRI | Alamo Regional | 2014-20...
"Competition has been shown to be useful up to a certain point and no further, but cooperation, which is the thing we must strive for today, begins where competition leaves off." - Franklin D. Roosevelt
Reply With Quote
  #4   Spotlight this post!  
Unread 01-02-2017, 14:59
EricLeifermann's Avatar
EricLeifermann EricLeifermann is offline
That was a short break
FRC #2826 (Wave Robotics)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2001
Location: Wisconsin
Posts: 1,071
EricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond repute
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

What is your shooter drum made out of?

This is awesome, just wish my computer would load the step file so I could get into the model more.
__________________
2002-2005 Appleton East High School: Team 93
2005-2011 Michigan Technological University: Team 857
2012-Present Wave Robotics Team 2826



Reply With Quote
  #5   Spotlight this post!  
Unread 01-02-2017, 15:09
fresh_prince fresh_prince is offline
Not allowed to navigate or DJ
AKA: Will Smith
FRC #3847 (Spectrum)
Team Role: Student
 
Join Date: Apr 2014
Rookie Year: 2013
Location: Houston
Posts: 23
fresh_prince is an unknown quantity at this point
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by EricLeifermann View Post
What is your shooter drum made out of?

This is awesome, just wish my computer would load the step file so I could get into the model more.
The current version is 45A high-temperature silicone rubber tubing from McMaster, I believe 1" ID 1.25" OD, stretched around 1.25" aluminum tubing. We hope to Smith to some white 35A though to keep with our colour scheme (and maybe get some better grip on the ball).
__________________
AMDG, LTF

3847 - Spectrum | 2014-2017 | Student
Reply With Quote
  #6   Spotlight this post!  
Unread 01-02-2017, 15:11
EricLeifermann's Avatar
EricLeifermann EricLeifermann is offline
That was a short break
FRC #2826 (Wave Robotics)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2001
Location: Wisconsin
Posts: 1,071
EricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond repute
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by fresh_prince View Post
The current version is 45A high-temperature silicone rubber tubing from McMaster, I believe 1" ID 1.25" OD, stretched around 1.25" aluminum tubing. We hope to Smith to some white 35A though to keep with our colour scheme (and maybe get some better grip on the ball).
We used that in our testing but it expanded too much. It looks like your're using a belted 2:1 reduction from a 775pro, have you not seen this expansion as well?
__________________
2002-2005 Appleton East High School: Team 93
2005-2011 Michigan Technological University: Team 857
2012-Present Wave Robotics Team 2826



Reply With Quote
  #7   Spotlight this post!  
Unread 01-02-2017, 15:17
fresh_prince fresh_prince is offline
Not allowed to navigate or DJ
AKA: Will Smith
FRC #3847 (Spectrum)
Team Role: Student
 
Join Date: Apr 2014
Rookie Year: 2013
Location: Houston
Posts: 23
fresh_prince is an unknown quantity at this point
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by EricLeifermann View Post
We used that in our testing but it expanded too much. It looks like your're using a belted 2:1 reduction from a 775pro, have you not seen this expansion as well?
What speeds were you testing at? We were testing primarily at 6000 rpm and didn't notice any separation from the aluminum or excessive expansion.

Granted, we did used solid 4" conveyor wheels [I know them as fairline (Fairlane?) Wheels, but maybe Allen can reply with their proper name] to shoot in 2016, and those loved to expand so maybe we're just used to shooter wheel expansion.
__________________
AMDG, LTF

3847 - Spectrum | 2014-2017 | Student

Last edited by fresh_prince : 01-02-2017 at 15:19.
Reply With Quote
  #8   Spotlight this post!  
Unread 01-02-2017, 15:21
EricLeifermann's Avatar
EricLeifermann EricLeifermann is offline
That was a short break
FRC #2826 (Wave Robotics)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2001
Location: Wisconsin
Posts: 1,071
EricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond repute
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by fresh_prince View Post
What speeds were you testing at? We were testing primarily at 6000 rpm and didn't notice any separation from the aluminum or excessive expenses.

Granted, we did used solid 4" conveyor wheels [I know them as fairline (Fairlane?) Wheels, but maybe Allen can reply with their proper name] to shoot in 2016, and those loved to expand so maybe we're just used to shooter wheel expansion.
I don't know what we were spinning them at accurately but it was faster than 6000. The problem wasn't that the expansion was affecting the shots, its that I wasn't comfortable safety wise with the expansion. We were also using 2in roller over a 1.5 aluminum tube, so maybe the smaller diameter doesn't expand as much was we saw with the large.
__________________
2002-2005 Appleton East High School: Team 93
2005-2011 Michigan Technological University: Team 857
2012-Present Wave Robotics Team 2826



Reply With Quote
  #9   Spotlight this post!  
Unread 01-02-2017, 15:29
fresh_prince fresh_prince is offline
Not allowed to navigate or DJ
AKA: Will Smith
FRC #3847 (Spectrum)
Team Role: Student
 
Join Date: Apr 2014
Rookie Year: 2013
Location: Houston
Posts: 23
fresh_prince is an unknown quantity at this point
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by EricLeifermann View Post
I don't know what we were spinning them at accurately but it was faster than 6000. The problem wasn't that the expansion was affecting the shots, its that I wasn't comfortable safety wise with the expansion. We were also using 2in roller over a 1.5 aluminum tube, so maybe the smaller diameter doesn't expand as much was we saw with the large.
Ah, that's fair. 1.5/2 does just have a lot more material to expand, so I wouldn't be surprised if our were also expanding but it's subtle enough to miss. Our shooter wheels are also boxed up so uncontrolled expansion should be relatively contained.
__________________
AMDG, LTF

3847 - Spectrum | 2014-2017 | Student
Reply With Quote
  #10   Spotlight this post!  
Unread 01-02-2017, 15:34
jkelleyrtp's Avatar
jkelleyrtp jkelleyrtp is offline
Let's just build a robot
AKA: Jon Kelley
FRC #5511 (Cortechs Robotics)
Team Role: Leadership
 
Join Date: Jul 2015
Rookie Year: 2014
Location: Apex, NC
Posts: 126
jkelleyrtp has much to be proud ofjkelleyrtp has much to be proud ofjkelleyrtp has much to be proud ofjkelleyrtp has much to be proud ofjkelleyrtp has much to be proud ofjkelleyrtp has much to be proud ofjkelleyrtp has much to be proud ofjkelleyrtp has much to be proud ofjkelleyrtp has much to be proud of
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

How many balls can you guys hold? Doesn't look like the traditional hopper to me, are you planning on intaking only?
__________________
Cortechs Robotics 2014-Present
Mechanical, CAD
Reply With Quote
  #11   Spotlight this post!  
Unread 01-02-2017, 15:37
fresh_prince fresh_prince is offline
Not allowed to navigate or DJ
AKA: Will Smith
FRC #3847 (Spectrum)
Team Role: Student
 
Join Date: Apr 2014
Rookie Year: 2013
Location: Houston
Posts: 23
fresh_prince is an unknown quantity at this point
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by jkelleyrtp View Post
How many balls can you guys hold? Doesn't look like the traditional hopper to me, are you planning on intaking only?
Our current estimates sit around 50 balls or so. We will have a hopper, the lexan sheets that it is made of have yet to be fully modeled though. There will be one panel on either side and an angled panel out over the fuel intake that will spring out when the intake is down, but be forced back into frame when the intake is pulled back up.
__________________
AMDG, LTF

3847 - Spectrum | 2014-2017 | Student
Reply With Quote
  #12   Spotlight this post!  
Unread 01-02-2017, 16:11
Kevin Sevcik's Avatar
Kevin Sevcik Kevin Sevcik is offline
(Insert witty comment here)
FRC #0057 (The Leopards)
Team Role: Mentor
 
Join Date: Jun 2001
Rookie Year: 1998
Location: Houston, Texas
Posts: 3,758
Kevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond repute
Send a message via AIM to Kevin Sevcik Send a message via Yahoo to Kevin Sevcik
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by EricLeifermann View Post
I don't know what we were spinning them at accurately but it was faster than 6000. The problem wasn't that the expansion was affecting the shots, its that I wasn't comfortable safety wise with the expansion. We were also using 2in roller over a 1.5 aluminum tube, so maybe the smaller diameter doesn't expand as much was we saw with the large.
Centrifugal acceleration* = w^2 * r. More RPMs and more radius = more force expanding your tube. Since this acceleration applies to all of the tube, thickness won't matter, aside from the smaller force on the ID of the tube. The only material property that matters is some sort of ratio of density and elastic modulus, but that'd be the same since ou said it was the same stuff.

So all in all, not surprising your tube wanted to expand more than Spectrum's. Are you guys going for a longer shot to need that much more surface speed?

*Yes centrifugal. Pedants are welcome to spend 15 minutes drawing a FBD with a tangential velocity, required change in velocity to create a circular path, implied acceleration, unbalanced force to create that acceleration, etc, etc. I'm going to pretend it's a real force and get on with my life.
__________________
The difficult we do today; the impossible we do tomorrow. Miracles by appointment only.

Lone Star Regional Troubleshooter

Last edited by Kevin Sevcik : 01-02-2017 at 16:19.
Reply With Quote
  #13   Spotlight this post!  
Unread 01-02-2017, 16:14
EricLeifermann's Avatar
EricLeifermann EricLeifermann is offline
That was a short break
FRC #2826 (Wave Robotics)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2001
Location: Wisconsin
Posts: 1,071
EricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond repute
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by Kevin Sevcik View Post
Centrifugal acceleration* = w^2 * r. More RPMs and more radius = more force expanding your tube. Since this acceleration applies to all of the tube, thickness won't matter, aside from the smaller force on the ID of the tube. The only material property that matters is some sort of ratio of density and elastic modulus, but that'd be the same since ou said it was the same stuff.

So all in all, not surprising your tube wanted to expand more than Spectrum's. Are you guys going for a longer shot to need that much more surface speed?
No just limiting the contact time and wheel size, as well as bad prototypes and the mentality that we will be able to spin slower with a properly built robot that has less friction deficiencies.
__________________
2002-2005 Appleton East High School: Team 93
2005-2011 Michigan Technological University: Team 857
2012-Present Wave Robotics Team 2826



Reply With Quote
  #14   Spotlight this post!  
Unread 01-02-2017, 17:16
Brian Selle's Avatar
Brian Selle Brian Selle is offline
Mentor
FRC #3310 (Black Hawk Robotics)
Team Role: Engineer
 
Join Date: Jan 2012
Rookie Year: 2012
Location: Texas
Posts: 170
Brian Selle has a spectacular aura aboutBrian Selle has a spectacular aura aboutBrian Selle has a spectacular aura about
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Nice job 3847! What are the servo motors on the front/back of the shooter for?
__________________
2016 Curie Quarter-Finalist (5803, 3310, 2168, 5940), Lubbock Regional Winner (3310, 4063, 4301), Arkansas Regional Winner (16, 3310, 6055)
2015 Newton Quarter-Finalist (3130, 2468, 3310, 537), Lubbock Regional Winner (2468, 3310, 4799)
2014 Galileo Quarter-Finalist (2052, 70, 3310, 3360), Colorado Regional Winner (1138, 3310, 2543)
2013 Archimedes Semi-Finalist (126, 3310, 1756), Texas Robot Roundup Winner (3310, 624, 2848), Dallas Regional Winner (148, 3310, 4610)
2012 Dallas West Regional Winner (935, 3310, 4206)
Reply With Quote
  #15   Spotlight this post!  
Unread 01-02-2017, 17:21
fresh_prince fresh_prince is offline
Not allowed to navigate or DJ
AKA: Will Smith
FRC #3847 (Spectrum)
Team Role: Student
 
Join Date: Apr 2014
Rookie Year: 2013
Location: Houston
Posts: 23
fresh_prince is an unknown quantity at this point
Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray

Quote:
Originally Posted by Brian Selle View Post
Nice job 3847! What are the servo motors on the front/back of the shooter for?
Thanks! We'll only be using one of the two sets of three, but they're intended to be lane blockers. If we line up to the boiler and one of our side streams isn't on target, we want to be able to disable that stream instead of realigning our entire robot. We have one in the middle so that we can theoretically make a shot while our side is lined up with either the driver station or the front wall of the field.
__________________
AMDG, LTF

3847 - Spectrum | 2014-2017 | Student

Last edited by fresh_prince : 01-02-2017 at 17:25.
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 05:11.

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