Go Back   VEX Forum > Community > Technical Discussion

Technical Discussion Open Technical Discussion of the VEX Robotics System.

Reply
 
Thread Tools
  #21  
Old 02-20-2012, 01:40 PM
Rick TYler's Avatar
Rick TYler Rick TYler is offline
RECF
VEX # RECF
 
Join Date: Mar 2007
Location: Redmond, Washington
Posts: 2,221
Images: 84
Re: Field disabling our robot during a match?

Quote:
Originally Posted by Dpbailey View Post
We have the flat top cortex and now that you say that I would not be surprised if it is a NC-1 Cortex because we got them the week they came out.

If it is a NC-1 Cortex could it be possible that this is our problem? And if it is would there be anything vex would do about it?

I will check tomorrow when I get to school.
If you are having problems that might be your Cortex controller, either post in the VEX tech support sub-forum or call VEX technical support (they are very nice people - don't be afraid to call if you are having a real problem). Just because it is an NC-1 doesn't mean that it doesn't work or that it is causing problems. I mentioned my own NC-1 because it works fine. You don't want to waste time chasing a problem that may not exist. Good luck.
__________________
Robotics Education and Competition Foundation (RECF), Northwestern US and Western Canada, and Online Challenges
Reply With Quote
  #22  
Old 02-20-2012, 02:13 PM
Dpbailey's Avatar
Dpbailey Dpbailey is offline
Senior Member
VEX # 569C
 
Join Date: Aug 2011
Location: Murrieta, California
Posts: 304
Re: Field disabling our robot during a match?

Quote:
Originally Posted by Rick TYler View Post
If you are having problems that might be your Cortex controller, either post in the VEX tech support sub-forum or call VEX technical support (they are very nice people - don't be afraid to call if you are having a real problem). Just because it is an NC-1 doesn't mean that it doesn't work or that it is causing problems. I mentioned my own NC-1 because it works fine. You don't want to waste time chasing a problem that may not exist. Good luck.
Yea we will be calling intelitek tomorrow at school but we are just trying to find the root of the problem. We are hoping that it is something simple like our brain being outdated our something.

Our controllers have also been dropped a few times. Can that be a problem with the electronics inside?
__________________
Team 569C YouTube Channel Facebook Page
CSUN Los Angeles Regional - Tournament Champions (569C, 599D, 599A) and Think Award
California High Desert League - TBA (9-1 with 20 more matches to be played on later dates)
Reply With Quote
  #23  
Old 02-20-2012, 02:16 PM
ManicMechanic ManicMechanic is offline
Senior Member
VEX # 438
 
Join Date: Dec 2006
Location: Modesto, CA
Posts: 649
Images: 13
Re: Field disabling our robot during a match?

Quote:
Originally Posted by Dpbailey View Post
At a tournament yesterday our robot would run fine when we weren't plugged into the competition field but the second we would plug into the field the robot either wouldn't work at all or would cut out after roughly 30 seconds.

The one time (out of four) our autonomous worked and we had control for the whole 2 minutes we won 25 to 22 with a broken alliance and two working enemies.

Anyways I really need help with this because the tournament was nothing but frustrating and my team doesn't want this to happen again.

If anyone could please help me with this we would be VERY VERY appreciative.
So sorry to hear about your difficulties -- it's frustrating to be dead on the field, especially when it might be something beyond your control.

Troubleshooting on the day of is generally easier than a post-mortem, as the conditions are generally impossible to recreate. While your builders/programmers are troubleshooting the robot, perhaps your scout can be watching the field to see if there are systematic errors on the field that propagate between matches.

One year, our team's robot was dead on the field for 2 of its first 3 matches, on the same field, but different alliance colors. Our scout was assigned to systematically watch the field where we had the trouble, and sure enough, it seemed there were plenty of matches where there was a dead robot, but some matches where there were no dead robots. The dead bot changed between red and blue, left and right, but in every case, the dead bot was a crystal robot. The team approached the staff suggesting that there might be a problem with the crystals, they tested the crystals, and sure enough, one crystal pair was not working (the all-vexnet matches, or matches when the bad pair didn't happen to get used were not a problem). The matches didn't get replayed, but the team felt that they'd accomplished something that helped not only themselves, but others as well.
__________________
He is no fool who gives what he cannot keep to gain what he cannot lose. -- Jim Elliot
Reply With Quote
  #24  
Old 02-20-2012, 02:45 PM
Rick TYler's Avatar
Rick TYler Rick TYler is offline
RECF
VEX # RECF
 
Join Date: Mar 2007
Location: Redmond, Washington
Posts: 2,221
Images: 84
Re: Field disabling our robot during a match?

Quote:
Originally Posted by Dpbailey View Post
Yea we will be calling intelitek tomorrow at school but we are just trying to find the root of the problem. We are hoping that it is something simple like our brain being outdated our something.

Our controllers have also been dropped a few times. Can that be a problem with the electronics inside?
John V-N just posted some information on NC and NC-1 Cortex controllers: http://www.vexforum.com/showpost.php...5&postcount=32
__________________
Robotics Education and Competition Foundation (RECF), Northwestern US and Western Canada, and Online Challenges
Reply With Quote
  #25  
Old 02-20-2012, 03:04 PM
Dpbailey's Avatar
Dpbailey Dpbailey is offline
Senior Member
VEX # 569C
 
Join Date: Aug 2011
Location: Murrieta, California
Posts: 304
Re: Field disabling our robot during a match?

Quote:
Originally Posted by Rick TYler View Post
John V-N just posted some information on NC and NC-1 Cortex controllers: http://www.vexforum.com/showpost.php...5&postcount=32
Thank you very much!
__________________
Team 569C YouTube Channel Facebook Page
CSUN Los Angeles Regional - Tournament Champions (569C, 599D, 599A) and Think Award
California High Desert League - TBA (9-1 with 20 more matches to be played on later dates)
Reply With Quote
  #26  
Old 02-21-2012, 09:18 AM
Dpbailey's Avatar
Dpbailey Dpbailey is offline
Senior Member
VEX # 569C
 
Join Date: Aug 2011
Location: Murrieta, California
Posts: 304
Re: Field disabling our robot during a match?

I just checked our brain this morning and all four of them say NC-1 but the 1 has a 2 written over it in sharpie.
__________________
Team 569C YouTube Channel Facebook Page
CSUN Los Angeles Regional - Tournament Champions (569C, 599D, 599A) and Think Award
California High Desert League - TBA (9-1 with 20 more matches to be played on later dates)
Reply With Quote
  #27  
Old 02-21-2012, 09:58 AM
Rick TYler's Avatar
Rick TYler Rick TYler is offline
RECF
VEX # RECF
 
Join Date: Mar 2007
Location: Redmond, Washington
Posts: 2,221
Images: 84
Re: Field disabling our robot during a match?

Quote:
Originally Posted by Dpbailey View Post
I just checked our brain this morning and all four of them say NC-1 but the 1 has a 2 written over it in sharpie.
If they say "NC-2" your controller was upgraded before shipping.
__________________
Robotics Education and Competition Foundation (RECF), Northwestern US and Western Canada, and Online Challenges
Reply With Quote
  #28  
Old 02-21-2012, 04:00 PM
Dpbailey's Avatar
Dpbailey Dpbailey is offline
Senior Member
VEX # 569C
 
Join Date: Aug 2011
Location: Murrieta, California
Posts: 304
Re: Field disabling our robot during a match?

Quote:
Originally Posted by Rick TYler View Post
If they say "NC-2" your controller was upgraded before shipping.
So even though it says NC-1 with 2 written over it, it is in fact a NC-2 Cortex?
__________________
Team 569C YouTube Channel Facebook Page
CSUN Los Angeles Regional - Tournament Champions (569C, 599D, 599A) and Think Award
California High Desert League - TBA (9-1 with 20 more matches to be played on later dates)
Reply With Quote
  #29  
Old 02-21-2012, 05:03 PM
Ryantech's Avatar
Ryantech Ryantech is offline
Senior Member
VEX # 1900
 
Join Date: Feb 2011
Location: Peachtree City, GA
Posts: 266
Arrow Re: Field disabling our robot during a match?

Our NC-2 cortexes also have a two written in on top of the 1 as well - I realize this is normal as stated above.

However, we also have some of the newer "pop top" cortexes that are NC-3 and the 3 is written in sharpie over a 1. is this normal?
__________________
Team 1900
Woodward Academy
College Park, GA
Reply With Quote
  #30  
Old 02-21-2012, 05:48 PM
jpearman's Avatar
jpearman jpearman is offline
Senior Member
VEX # 8888
 
Join Date: Apr 2011
Location: Los Angeles
Posts: 3,119
Images: 2
Re: Field disabling our robot during a match?

It would be great if VEX could post details of all cortex revisions and changes made. Before this latest episode I think we all thought that there were only two versions, old flat top ones and the new raised VEXnet key version. Now we understand that there are at least 5?

NC
NC-1
NC-2
NC-3
A3

I hear the change from NC-1 to NC-2 was a change in BOM, perhaps some resistors. I would love to know what the other changes were made, I certainly see other subtle difference between an NC-2 and an A3.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 08:21 AM.


VEX and VEX Robotics are trademarks or service marks of Innovation First International, Inc.
Copyright © 2002-2013. All Rights Reserved. VEX Robotics, Inc. is a subsidiary of Innovation First International, Inc.
All other product names/marks of others are the property of their respective owners.