OCCRA
Go to Post The folks in Indiana don't play around. - PayneTrain [more]
Home
Go Back   Chief Delphi > FIRST > Robot Showcase
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 01-15-2017, 02:05 PM
JamesCH95's Avatar
JamesCH95 JamesCH95 is offline
Hardcore Dork
AKA: JCH
FRC #0095 (The Grasshoppers)
Team Role: Engineer
 
Join Date: Dec 2004
Rookie Year: 2001
Location: Enfield, NH
Posts: 2,151
JamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond repute
Team 95 2017 Build Thread

Starting early this year!

After the game reveal we considered what would be the most effective way to score points. Crude analysis below.



We then brainstormed some ideas on how to play the game. I will not attempt to justify any of their names, and ran them through a weighted decision matrix to help us pick a design.



Using these analyses we concluded that scoring GEARs and climbing would be the best way to generate points and thus deserve a high priority in our design and build efforts. A stunning conclusion for sure.

However, this game is quite well-designed. Focusing on GEARs and climbing will only enable winning if you are tremendously better than the opposing alliance because of the discrete, and increasingly difficult, gear scoring tiers. For example: an alliance that can deliver 11 GEARs cannot out-score an alliance that can only deliver 6 GEARs, all else being equal. So we concluded that we should have some capacity to score FUEL. Also, a stunning conclusion.

We created a number of layout sketches, made prototype mechanisms, and evaluated these in the quite-restrictive sizing volume. It because obvious that scoring in the low FUEL goal would adversely affect our GEAR and climbing performance, so we have chosen to score FUEL in the high goal. We do not intend to focus volume, weight, or design effort on shooting as with the other two mechanisms. This will likely result in a low total scoring potential, but the idea with scoring FUEL in the high goal is merely to edge-out over an alliance that can score a similar number of gears. A small number of points should do the trick.

With that, we have started to model our robot. I will post some screen shots of that soon.
__________________
Theory is a nice place, I'd like to go there one day, I hear everything works there.

Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
Reply With Quote
  #2   Spotlight this post!  
Unread 01-15-2017, 03:14 PM
JamesCH95's Avatar
JamesCH95 JamesCH95 is offline
Hardcore Dork
AKA: JCH
FRC #0095 (The Grasshoppers)
Team Role: Engineer
 
Join Date: Dec 2004
Rookie Year: 2001
Location: Enfield, NH
Posts: 2,151
JamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond repute
Re: Team 95 2017 Build Thread

Quote:
Originally Posted by tomy View Post
Isn't it 1 ball in high goal and 3 balls in the low goal for auto. Then 3 balls in the high goal and 9 balls in the low goal for one point?
It is. Thus the score for one trip to the high goal in AUTO being worth 10 points.

I wasn't clear that each line represents on 'trip' or one 'activity.'
__________________
Theory is a nice place, I'd like to go there one day, I hear everything works there.

Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
Reply With Quote
  #3   Spotlight this post!  
Unread 01-16-2017, 07:01 PM
JamesCH95's Avatar
JamesCH95 JamesCH95 is offline
Hardcore Dork
AKA: JCH
FRC #0095 (The Grasshoppers)
Team Role: Engineer
 
Join Date: Dec 2004
Rookie Year: 2001
Location: Enfield, NH
Posts: 2,151
JamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond repute
Re: Team 95 2017 Build Thread

First chunk of CAD work is done. We don't mind if you take inspiration (or copy) any piece of the design, just cite your source please!



Still two major mechanical subsystems to go.
__________________
Theory is a nice place, I'd like to go there one day, I hear everything works there.

Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
Reply With Quote
  #4   Spotlight this post!  
Unread 01-16-2017, 07:02 PM
Ty Tremblay's Avatar
Ty Tremblay Ty Tremblay is offline
Robotics Engineer
FRC #0319 (Big Bad Bob)
Team Role: Mentor
 
Join Date: Feb 2006
Rookie Year: 2004
Location: Alton NH
Posts: 938
Ty Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond reputeTy Tremblay has a reputation beyond repute
Re: Team 95 2017 Build Thread

Thanks for doing this again. Your 2015 arm concept basically saved our season.
__________________
Reply With Quote
  #5   Spotlight this post!  
Unread 01-16-2017, 07:10 PM
JamesCH95's Avatar
JamesCH95 JamesCH95 is offline
Hardcore Dork
AKA: JCH
FRC #0095 (The Grasshoppers)
Team Role: Engineer
 
Join Date: Dec 2004
Rookie Year: 2001
Location: Enfield, NH
Posts: 2,151
JamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond repute
Re: Team 95 2017 Build Thread

Always happy to answer any questions people have, too.

Quote:
Originally Posted by Ty Tremblay View Post
Thanks for doing this again. Your 2015 arm concept basically saved our season.
That's a big reason why we do this!
__________________
Theory is a nice place, I'd like to go there one day, I hear everything works there.

Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
Reply With Quote
  #6   Spotlight this post!  
Unread 01-16-2017, 07:37 PM
pmangels17's Avatar
pmangels17 pmangels17 is offline
Mechanical Marauders - Alumnus
AKA: Paul Mangels
FRC #0271 (Mechanical Marauders)
Team Role: Mechanical
 
Join Date: Jan 2012
Rookie Year: 2011
Location: Bay Shore, NY
Posts: 440
pmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond reputepmangels17 has a reputation beyond repute
Re: Team 95 2017 Build Thread

Thanks for putting this thread together! It is my favorite thread of the season every year, best of luck!
__________________
Junior at the University of Notre Dame, Mechanical Engineering

Got questions (about Notre Dame, robots, college, etc), don't hesitate to ask.

**Bang Boom Pop!** "Was that the robot?" "I don't know, do it again"
**BANG BOOM POP** "Oh, now it's on fire."
Reply With Quote
  #7   Spotlight this post!  
Unread 01-16-2017, 07:51 PM
MrBasse MrBasse is offline
Registered User
FRC #3572 (Wavelength)
Team Role: Coach
 
Join Date: Jul 2011
Rookie Year: 2010
Location: Norton Shores, MI
Posts: 703
MrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond reputeMrBasse has a reputation beyond repute
Re: Team 95 2017 Build Thread

I see some 1.25"ish cylinders in each corner of that frame....are we looking to avoid being pushed around by lifting the whole robot?
__________________
Andrew Basse
Coach - FRC Team 3572 - Wavelength
Reply With Quote
  #8   Spotlight this post!  
Unread 01-16-2017, 08:07 PM
Lil' Lavery Lil' Lavery is offline
TSIMFD
AKA: Sean Lavery
FRC #1712 (DAWGMA)
Team Role: Mentor
 
Join Date: Nov 2003
Rookie Year: 2003
Location: Philadelphia, PA
Posts: 6,995
Lil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond reputeLil' Lavery has a reputation beyond repute
Send a message via AIM to Lil' Lavery
Re: Team 95 2017 Build Thread

I'm playing the "figure out what that cylinder does" game right now, and I'm batting about 50%.

If I'm guess correctly, that's going to be a lot of air usage per cycle.
__________________
Being correct doesn't mean you don't have to explain yourself.
Reply With Quote
  #9   Spotlight this post!  
Unread 01-16-2017, 08:23 PM
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: 3,898
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: Team 95 2017 Build Thread

Quote:
Originally Posted by Lil' Lavery View Post
I'm playing the "figure out what that cylinder does" game right now, and I'm batting about 50%.

If I'm guess correctly, that's going to be a lot of air usage per cycle.
So the pair of overlapped cylinders from green to yellow are probably to tilt the yellow bit down to ease the gear entry from the loading station. The four long stroke, small bore cylinders (plus linear rods!) from red to (probably) green are either to get the gear mechanism over the bumper into the wall for loading a gear, or maybe for putting it in place? There's the sideways one under the gear to pivot the blue wings open/closed on those hinges, I'm assuming that one has a bushing instead of a pin in the end of the cylinder.

And then the four in the corners of the chassis which are probably brakes.

That's definitely a lot of air consumption, even if you're regulating down since most of those probably don't need 60psi.
__________________
The difficult we do today; the impossible we do tomorrow. Miracles by appointment only.

Lone Star Regional Troubleshooter
Reply With Quote
  #10   Spotlight this post!  
Unread 01-16-2017, 08:43 PM
JamesCH95's Avatar
JamesCH95 JamesCH95 is offline
Hardcore Dork
AKA: JCH
FRC #0095 (The Grasshoppers)
Team Role: Engineer
 
Join Date: Dec 2004
Rookie Year: 2001
Location: Enfield, NH
Posts: 2,151
JamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond repute
Re: Team 95 2017 Build Thread

Quote:
Originally Posted by MrBasse View Post
I see some 1.25"ish cylinders in each corner of that frame....are we looking to avoid being pushed around by lifting the whole robot?
No... Never... We totally haven't done this before and won a Creativity award for it...

Quote:
Originally Posted by Kevin Sevcik View Post
So the pair of overlapped cylinders from green to yellow are probably to tilt the yellow bit down to ease the gear entry from the loading station. The four long stroke, small bore cylinders (plus linear rods!) from red to (probably) green are either to get the gear mechanism over the bumper into the wall for loading a gear, or maybe for putting it in place? There's the sideways one under the gear to pivot the blue wings open/closed on those hinges, I'm assuming that one has a bushing instead of a pin in the end of the cylinder.

And then the four in the corners of the chassis which are probably brakes.

That's definitely a lot of air consumption, even if you're regulating down since most of those probably don't need 60psi.
Winner winner, chicken dinner.

So, it 2014 we had a robot with a similar air setup. 4x spring-return cylinders for brakes, 2x air cylinder ball shifters, and then eight(8) 3/4inx6in cylinders to actuate the four panels of the robot (see below). We used the 9% duty cycle Viair with a fan running over it (the fan is a TREMENDOUS help) and 6x of the small metallic Clippard tanks for storage. We didn't have any air consumption issues that year. For this year, we're looking at fewer air cylinders with shorter strokes (but similar bores) and hopefully a better compressor. I anticipate success!

2014 Robot:
__________________
Theory is a nice place, I'd like to go there one day, I hear everything works there.

Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
Reply With Quote
  #11   Spotlight this post!  
Unread 01-16-2017, 09:16 PM
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: 3,898
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: Team 95 2017 Build Thread

I don't do a lot of linear mechanisms like it, but I'm mildly concerned about your 4 piston extend-o thing binding up the linear rods. The ratio of bearing distance to top-to-bottom distance seems dicey with the off-center placement, but looks like it should be inside the standard 2:1 ratio. The bearing distance to side-to-side distance definitely isn't 2:1, so you could have a problem there, though it'll help if the green bit is a little flexible.

With 4 pistons pushing like that, I think it'll move eventually once pressures equalize, but if one pressurizes sooner, it could bind things up until the others catch up sufficiently. Best make sure all the lines are the same length.
__________________
The difficult we do today; the impossible we do tomorrow. Miracles by appointment only.

Lone Star Regional Troubleshooter
Reply With Quote
  #12   Spotlight this post!  
Unread 01-16-2017, 09:21 PM
JamesCH95's Avatar
JamesCH95 JamesCH95 is offline
Hardcore Dork
AKA: JCH
FRC #0095 (The Grasshoppers)
Team Role: Engineer
 
Join Date: Dec 2004
Rookie Year: 2001
Location: Enfield, NH
Posts: 2,151
JamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond repute
Re: Team 95 2017 Build Thread

Quote:
Originally Posted by Kevin Sevcik View Post
I don't do a lot of linear mechanisms like it, but I'm mildly concerned about your 4 piston extend-o thing binding up the linear rods. The ratio of bearing distance to top-to-bottom distance seems dicey with the off-center placement, but looks like it should be inside the standard 2:1 ratio. The bearing distance to side-to-side distance definitely isn't 2:1, so you could have a problem there, though it'll help if the green bit is a little flexible.

With 4 pistons pushing like that, I think it'll move eventually once pressures equalize, but if one pressurizes sooner, it could bind things up until the others catch up sufficiently. Best make sure all the lines are the same length.
Points well taken. Plumbing equal-length tubing might work well, or spending a little time tuning each air cylinder with a flow controller.
__________________
Theory is a nice place, I'd like to go there one day, I hear everything works there.

Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
Reply With Quote
  #13   Spotlight this post!  
Unread 01-19-2017, 12:07 PM
JamesCH95's Avatar
JamesCH95 JamesCH95 is offline
Hardcore Dork
AKA: JCH
FRC #0095 (The Grasshoppers)
Team Role: Engineer
 
Join Date: Dec 2004
Rookie Year: 2001
Location: Enfield, NH
Posts: 2,151
JamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond repute
Re: Team 95 2017 Build Thread

CAD continues to inch forward as we spool up to start fabrication this week.



We've purchased the Tormach Tooling System collet and holders for our CNC knee mill. A nice little upgrade to take Z-height adjustments out of the equation.

We have also decommissioned two old robots. We were running out of space to store them, and we will be scavenging parts from them to build a practice robot without breaking the bank (I hope).
__________________
Theory is a nice place, I'd like to go there one day, I hear everything works there.

Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
Reply With Quote
  #14   Spotlight this post!  
Unread 01-19-2017, 12:49 PM
gorrilla's Avatar
gorrilla gorrilla is offline
1557 alumni, 4639 mentor
AKA: adam spears
FRC #4639 (RoboSpartans)
Team Role: Mentor
 
Join Date: Mar 2008
Rookie Year: 2007
Location: Houston
Posts: 1,285
gorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond reputegorrilla has a reputation beyond repute
Re: Team 95 2017 Build Thread

Quote:
Originally Posted by JamesCH95 View Post
No... Never... We totally haven't done this before and won a Creativity award for it...



Winner winner, chicken dinner.

So, it 2014 we had a robot with a similar air setup. 4x spring-return cylinders for brakes, 2x air cylinder ball shifters, and then eight(8) 3/4inx6in cylinders to actuate the four panels of the robot (see below). We used the 9% duty cycle Viair with a fan running over it (the fan is a TREMENDOUS help) and 6x of the small metallic Clippard tanks for storage. We didn't have any air consumption issues that year. For this year, we're looking at fewer air cylinders with shorter strokes (but similar bores) and hopefully a better compressor. I anticipate success!

2014 Robot:
What was the purpose of the pop outs on this 2014 robot?
Just to catch the trackball?
__________________
Adam Spears



Team 1557 2007-2011 student-Lake County FL

Current Team 4639 mentor- Houston TX
Reply With Quote
  #15   Spotlight this post!  
Unread 01-19-2017, 12:52 PM
Fields's Avatar
Fields Fields is offline
Classic
no team
Team Role: Engineer
 
Join Date: Dec 2014
Rookie Year: 2015
Location: Minneapolis
Posts: 119
Fields is a name known to allFields is a name known to allFields is a name known to allFields is a name known to allFields is a name known to allFields is a name known to all
Re: Team 95 2017 Build Thread

I am curious about your brake system and effectiveness.

Are you just using 4 rubber stoppers and do you have any video of someone trying to push you in competition?
__________________
Wait... you built what now?
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 08:40 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