OCCRA
Go to Post The 2016 Palmetto regional will be the most watched regional during week 0.5. - Procolsaurus [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Media  
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 08-10-2018, 05:36 PM
GeeTwo GeeTwo is offline
Somebody Else
AKA: Gus Michel II
no team
Team Role: Mentor
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Slidell, LA
Posts: 5,982
GeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond repute
pic: Mini-Koopa, our 2018 off season robot

Reply With Quote
  #2   Spotlight this post!  
Unread 08-10-2018, 05:38 PM
Setthew2000 Setthew2000 is offline
Registered User
FRC #5161 (Trojan Technicians)
Team Role: CAD
 
Join Date: Sep 2017
Rookie Year: 2013
Location: Plainwell Michigan
Posts: 5
Setthew2000 is an unknown quantity at this point
Re: pic: Mini-Koopa, our 2018 off season robot

How have you guys got your intake set up? I love the design! I am looking to update our robots intake in the off season. Thank you!
Reply With Quote
  #3   Spotlight this post!  
Unread 08-11-2018, 07:24 PM
wgorgen's Avatar
wgorgen wgorgen is offline
Registered User
FRC #1533 (Triple Strange)
Team Role: Mentor
 
Join Date: Apr 2018
Rookie Year: 2014
Location: Greensboro, NC, USA
Posts: 146
wgorgen is a splendid one to beholdwgorgen is a splendid one to beholdwgorgen is a splendid one to beholdwgorgen is a splendid one to beholdwgorgen is a splendid one to beholdwgorgen is a splendid one to beholdwgorgen is a splendid one to behold
Re: pic: Mini-Koopa, our 2018 off season robot

How much does it weigh? Do you have the heft and power to be a formidable defensive pushing bot (ala 2655), or are you light and geared for speed so that you can attack the opposing switch, defend your own switch and work the vault?

Well executed switch bots with good strategy have been able to do very well at many competitions this year. Getting the autoquest ranking point consistently is key (I assume you have a consistent switch auto?).
__________________
Reply With Quote
  #4   Spotlight this post!  
Unread 08-11-2018, 11:39 PM
GeeTwo GeeTwo is offline
Somebody Else
AKA: Gus Michel II
no team
Team Role: Mentor
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Slidell, LA
Posts: 5,982
GeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond repute
Re: pic: Mini-Koopa, our 2018 off season robot

Quote:
Originally Posted by Setthew2000 View Post
How have you guys got your intake set up? I love the design! I am looking to update our robots intake in the off season. Thank you!
The arms are made of 1x1 polycarb versaframe. As shown in the pic, they were actuated by opposing angled 3/4" diameter, 2" throw cylinders. At that demo, we found out we didn't really need the actuation, so for Beach Bot we hard mounted them to that cross bar partway up the arm; all our "give" is now in the polycarb arms and the wheel compliance. This change removed the constant maintenance and occasional breakage on the slides, which were made of the kit parts from igus. IIRC, there is now 16.5" between the insides of the arms, (17.5" on centers).

We use four VF planetary side mounts and four VF output stages (1/2" hex) to support the four axles which mount the intake wheels. They are belted together with 100t 9mm belts and 18t pulleys all from Vex. The rear two are driven with BAGS reduced 10:1. My math shows proper C-C distance is 8.07", but we get by with 8.00". The wheels are obviously the AM 4" green compliant wheels (1/2" hex).

Caveat: we can control, herd, and push a "sideways" cube into the exchange, but we cannot pick one up to launch into the switch. When this is needed, we use one of our "twist out" command buttons which spins both BAGs the the same direction; this ejects the cube with little forward speed but enough spin to turn it about 90 degrees, setting up a "wide" pickup.

The arm is set up so the leading wheels are completely outside the bumpers down, inside the FP when up (45 degrees angle by design, but actually a bit higher by the time we got everything working right).

The arm is actuated with a 2.5" diameter 2" stroke compact cylinder from Bimba (FOS-502) we used to stretch our launcher springs in STRONGHOLD. The clevis bracket is a piece of 1-1/4" square x 1/8" channel with an angled slot cut in it (higher at the rear, lower at the front to increase the lift) made using our perfboard and drill press technology. OK, we were a bit short on the lift force, so we added a 3/4" cylinder at the front (mounted only to the chassis) to give the arm a starting boost, which lets the rear one do most of the work.

The chassis is 2/3 of the AM14U3. The side plates are from our 2017 practice chassis, front, rear, and middle from our 2018 practice chassis. We cut off the back 11" of the inside and outside sheets chassis and only use 4 each 6 inch wheels. We might have gone a bit shorter, but this length lets us use the churro holes at 11.767/20.233" to stabilize the outer sheet.

[quote=wgorgen;1779032]How much does it weigh?[quote]
Our Beach Bot weigh in was 65#; even with bumpers and battery, it's occasionally lifted by one person to place on our "operating stand" or wagon, and I don't mean one of the football players either. I've carried it (arm down, bumpers but no battery) under one arm a hundred feet with no real stress.

[quote=wgorgen;1779032]Do you have the heft and power to be a formidable defensive pushing bot (ala 2655), or are you light and geared for speed so that you can attack the opposing switch, defend your own switch and work the vault?[quote]
Definitely the latter -- stock AM14U2 gearbox (8.45:1) with U3 (6") wheels, for a design speed of 12.7 ft/s, but it gets up to it rather quickly as it's so light. Our idea of defense is as commonly stealing a cube from the opposing portal before the other alliance can get to it as it is blocking for more than 2 seconds. Our robot-to-robot defense is usually a check block on a scale bot en route to wherever we're going; usually costs the opposing robot 3x as much time as us.

Quote:
Originally Posted by wgorgen View Post
Well executed switch bots with good strategy have been able to do very well at many competitions this year. Getting the autoquest ranking point consistently is key (I assume you have a consistent switch auto?).
At Beach Bot, we had two "drive straight to the switch, and launch the cube if we're on the correct side" autos, one for left and one for right, and a "drive straight" for when we had a partner who could do both from the center. We didn't go any farther at that time because encoders weren't working. For Red Stick, we've been working on a "start center, drive to the appropriate side of the switch, and launch"; it's working about 50% as of today in practice, and improving each session.
__________________

If you can't find time to do it right, how are you going to find time to do it over?
If you don't pass it on, it never happened.
Robots are great, but inspiration is the reason we're here.
Friends don't let friends use master links.
[Quoting brennonbrimhall]: We design a new robot every year, but we can't forget that we also design a new team every year as folks come and go.
Reply With Quote
  #5   Spotlight this post!  
Unread 08-13-2018, 08:48 AM
Taylor's Avatar
Taylor Taylor is offline
Professor of Thinkology, ThD
AKA: @taylorstem
FRC #3487 (Red Pride Robotics)
Team Role: Teacher
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Plainfield, IN, USA 46168
Posts: 4,918
Taylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond repute
Re: pic: Mini-Koopa, our 2018 off season robot

We did not know there were any other Koopas out there. Ours was so named because the robot resembled a turtle. What's the story behind your robot's name?
__________________
Hi!
Reply With Quote
  #6   Spotlight this post!  
Unread 08-13-2018, 10:04 AM
GeeTwo GeeTwo is offline
Somebody Else
AKA: Gus Michel II
no team
Team Role: Mentor
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Slidell, LA
Posts: 5,982
GeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond repute
Re: pic: Mini-Koopa, our 2018 off season robot

Quote:
Originally Posted by Taylor View Post
We did not know there were any other Koopas out there. Ours was so named because the robot resembled a turtle. What's the story behind your robot's name?
Our original definitely did not resemble a turtle - the name applies much better to mini.

I wasn't there, but I understand that during lunch break at one of the Saturday scouting sessions (watching streaming weeks 0 - 3 in a classroom on the main campus), the discussion turned to the Mario games and they decided that would be a good robot name. Our graphics sponsor is the father of one of the students who was there, so it made it onto the robot. Other than cubert, varieties of cheese were all that ever showed up on the robot-name-2018 channel.
__________________

If you can't find time to do it right, how are you going to find time to do it over?
If you don't pass it on, it never happened.
Robots are great, but inspiration is the reason we're here.
Friends don't let friends use master links.
[Quoting brennonbrimhall]: We design a new robot every year, but we can't forget that we also design a new team every year as folks come and go.

Last edited by GeeTwo : 08-13-2018 at 02:57 PM. Reason: added "resemble a turtle"
Reply With Quote
  #7   Spotlight this post!  
Unread 08-27-2018, 09:52 PM
GeeTwo GeeTwo is offline
Somebody Else
AKA: Gus Michel II
no team
Team Role: Mentor
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Slidell, LA
Posts: 5,982
GeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond repute
Re: pic: Mini-Koopa, our 2018 off season robot

At 2018 Red Stick Rumble, we were first pick of the #6 alliance, and pulled at least our fair share of the load to a second place finish. We were the top vault bot, scoring 255 vault points in 6 qual matches, and 220 in our first five elims matches, and I believe 265 in the 6 elims matches. We also ranked #10 in park/climb points with NO climber.
__________________

If you can't find time to do it right, how are you going to find time to do it over?
If you don't pass it on, it never happened.
Robots are great, but inspiration is the reason we're here.
Friends don't let friends use master links.
[Quoting brennonbrimhall]: We design a new robot every year, but we can't forget that we also design a new team every year as folks come and go.
Reply With Quote
  #8   Spotlight this post!  
Unread 08-28-2018, 05:50 AM
Foster Foster is offline
Engineering Program Management
VRC #8081 (STEMRobotics)
Team Role: Mentor
 
Join Date: Jul 2007
Rookie Year: 2005
Location: Delaware
Posts: 1,565
Foster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond reputeFoster has a reputation beyond repute
Re: pic: Mini-Koopa, our 2018 off season robot

Very cool, brings home the point that "Less is often more" and "Doing one thing really well beats doing three things poorly"

Congrats at RSR!!!
__________________
Foster - VEX Delaware - 17 teams in 2016/17 -> 62 teams 2017/18 -- Chief Roboteer STEMRobotics.org
2010 - Mentor of the Year - VEX Clean Sweep World Championship
2006-2017, over a decade of doing VEX, time really flies while having fun
Delmarva Robotics and VEXMen Team Site come see what we can do for you.
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 11:53 PM.

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


Powered by vBulletin®
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi