Go to Post I never had any doubt; good people who do good quality work will always prosper. - Gary Dillard [more]
Home
Go Back   Chief Delphi > Technical > Electrical
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
 
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 15-01-2013, 20:43
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,798
Al Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond repute
Re: Average Current Draw

Daniel,
Are you asking about all electronics? I would guess that the Crio, Radio, camera, DSC, and several no load speed controllers will likely draw as much as 20 amps peak but typically much less. A typical ham power supply ought to do the trick. If you add the compressor or some motors, most power supplies will trip off on current overload.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.
  #2   Spotlight this post!  
Unread 15-01-2013, 22:49
Bill_B Bill_B is offline
You cannot not make a difference
FRC #2170
 
Join Date: Jan 2010
Rookie Year: 2004
Location: Connecticut
Posts: 1,099
Bill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond repute
Re: Average Current Draw

I measured current for an idle control system last year at under 1 amp. Later that same season I learned that the main circuit breaker has a resistance that is very close to providing 1mV per ampere of current going through it. I briefly considered making a small circuit that would allow the main program to monitor its own current use. The team wasn't interested, so I never pursued the legality of the simple wire connections. This wouldn't prevent you from making measures of a running machine while it is not in actual competition to find out what current is being drained. I may make a symbiotic NXT robot with data-logging to ride along just for curiosity's sake alone. If I knew more about arduinos I might be trying to use one of those to do it.
__________________
Nature's Fury FLL team 830 - F L eLements
FRC team 2170 - Titanium Tomahawks
  #3   Spotlight this post!  
Unread 15-01-2013, 22:54
dmitch's Avatar
dmitch dmitch is offline
Chief Head Electrical Guy
AKA: Daniel Mitchell
FRC #1997 (Stag Robotics)
Team Role: Programmer
 
Join Date: Feb 2010
Rookie Year: 2010
Location: Bishop Miege High School
Posts: 142
dmitch is a jewel in the roughdmitch is a jewel in the roughdmitch is a jewel in the roughdmitch is a jewel in the rough
Re: Average Current Draw

We won't have anything connected to the board that will be drawing a lot of power. (motors, pneumatics, etc.), it will be just the control components.

Thanks for the posts, that helped a lot!
__________________
  #4   Spotlight this post!  
Unread 16-01-2013, 00:20
Slartibartfest Slartibartfest is offline
Registered User
FRC #1758
 
Join Date: Jan 2013
Location: Florence
Posts: 8
Slartibartfest is an unknown quantity at this point
Re: Average Current Draw

How much power does a CIM draw? At what voltage? Also if you know the weight of the motor and Jag/Spike/Talon that would be helpful for me to know.
  #5   Spotlight this post!  
Unread 16-01-2013, 08:17
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,798
Al Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond repute
Re: Average Current Draw

Bill,
That is the current for just a barebones Crio, right?

Slartibartfest, the stall current on a CIM is 131 amps at 12 volts.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.
  #6   Spotlight this post!  
Unread 16-01-2013, 09:49
Bill_B Bill_B is offline
You cannot not make a difference
FRC #2170
 
Join Date: Jan 2010
Rookie Year: 2004
Location: Connecticut
Posts: 1,099
Bill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond reputeBill_B has a reputation beyond repute
Re: Average Current Draw

Quote:
Originally Posted by Al Skierkiewicz View Post
Bill,
That is the current for just a barebones Crio, right?
Yes. I think there were four jags, but no motors running. No compressor and I don't think the radio was powered either. The team was just leaving the board powered while they made programming changes and I wondered how long they could expect a battery to last. We develop a control board in parallel with mechanical fabrication. The current hungry parts are in the other room for most of the early fabrications.
__________________
Nature's Fury FLL team 830 - F L eLements
FRC team 2170 - Titanium Tomahawks
  #7   Spotlight this post!  
Unread 16-01-2013, 10:01
Mike AA's Avatar
Mike AA Mike AA is offline
Programmer and Mentor
AKA: Mike Aalderink
FRC #3458 (Code Blue)
Team Role: Programmer
 
Join Date: Jan 2003
Rookie Year: 1999
Location: Holland, Mi
Posts: 698
Mike AA is a splendid one to beholdMike AA is a splendid one to beholdMike AA is a splendid one to beholdMike AA is a splendid one to beholdMike AA is a splendid one to beholdMike AA is a splendid one to beholdMike AA is a splendid one to beholdMike AA is a splendid one to behold
Send a message via MSN to Mike AA
Re: Average Current Draw

A couple years ago we built an electrical board that hooks to a track on the ceiling I pull side to side. We put about 8 motors on speed controlers, 2 spikes 1 for compressor (not hooked up just for code visual) one for motor and a bunch of limit switches and the crio and PD and side car and a potentiometer. I hook up one battery and this usually will last me running motors and things for a week or more.
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 15:31.

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