Go to Post Another lesson is don't post on Chief Delphi disappointed, stop and evaluate first. Emotions suck sometimes. :-) - sircedric4 [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 12-02-2009, 00:05
alleah2338's Avatar
alleah2338 alleah2338 is offline
Registered User
FRC #2338
Team Role: Electrical
 
Join Date: Feb 2009
Rookie Year: 2008
Location: Oswego
Posts: 2
alleah2338 is an unknown quantity at this point
Red face How do you wire a rotating component?

So my team this year is using a shooter device and the design is for the shooter to rotate. Since this only our second year we have no idea how to wire the motor since it is attached to the shooter. We would like to do it without wires hanging everywhere. We have search how to slip mount them and haven't found anything. In past years books we have seen teams who have done something similar and can not figure out how.
Does anyone know how to do this?
  #2   Spotlight this post!  
Unread 12-02-2009, 00:08
MrForbes's Avatar
MrForbes MrForbes is offline
Registered User
AKA: Jim
FRC #1726 (N.E.R.D.S.)
Team Role: Mentor
 
Join Date: Feb 2006
Rookie Year: 2006
Location: Sierra Vista AZ
Posts: 6,013
MrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond repute
Re: How do you wire a rotating component?

Route the wires carefully.

We're facing the same problem, we made a pole that sticks up behind the turreted shooter, and the wires go forward from there to the top, center of the shooter. Haven't tested it much yet this way...but the wires did survive a couple weeks of testing when they were just hanging all over the place.

Our turret only moves 180 degrees or so. That might be different than yours.

Using slip ring contacts is a tricky business!
  #3   Spotlight this post!  
Unread 12-02-2009, 00:09
Joe G.'s Avatar
Joe G. Joe G. is offline
Taking a few years (mostly) off
AKA: Josepher
no team (Formerly 1687, 5400)
Team Role: Mentor
 
Join Date: Sep 2006
Rookie Year: 2007
Location: Worcester, MA
Posts: 1,451
Joe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond reputeJoe G. has a reputation beyond repute
Send a message via AIM to Joe G.
Re: How do you wire a rotating component?

either using these: http://www.mercotac.com/html/430.html

or simply limiting the rotation of the device to 180 or 360 degrees, and letting the slack in the wire make up this distance.

Or, by putting the wires through the igus energy chain, and having the chain wrap itself around the turret as it rotates, while giving the chain space to expand to as it rotates the opposite way.
__________________
FIRST is not about doing what you can with what you know. It is about doing what you thought impossible, with what you were inspired to become.

2007-2010: Student, FRC 1687, Highlander Robotics
2012-2014: Technical Mentor, FRC 1687, Highlander Robotics
2015-2016: Lead Mentor, FRC 5400, Team WARP
2016-???: Volunteer and freelance mentor-for-hire
  #4   Spotlight this post!  
Unread 12-02-2009, 00:13
alleah2338's Avatar
alleah2338 alleah2338 is offline
Registered User
FRC #2338
Team Role: Electrical
 
Join Date: Feb 2009
Rookie Year: 2008
Location: Oswego
Posts: 2
alleah2338 is an unknown quantity at this point
Re: How do you wire a rotating component?

Thank you. I will try some of these ideas tomorrow. Our shooter only rotates 180 degrees. We have thought about tying them down with elastic so they can move but still be held tight. Has anyone tried that?
  #5   Spotlight this post!  
Unread 12-02-2009, 01:14
EricH's Avatar
EricH EricH is offline
New year, new team
FRC #1197 (Torbots)
Team Role: Engineer
 
Join Date: Jan 2005
Rookie Year: 2003
Location: SoCal
Posts: 19,807
EricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond repute
Re: How do you wire a rotating component?

Quote:
Originally Posted by alleah2338 View Post
Thank you. I will try some of these ideas tomorrow. Our shooter only rotates 180 degrees. We have thought about tying them down with elastic so they can move but still be held tight. Has anyone tried that?
What you can do in that case is: run the wires to the midpoint before tying them down. One of the ends will also do; the midpoint is just to reduce the length of wire you'll have to bundle and pull out of the way. Now, rotate the shooter to the maximum rotation in both directions, using a piece of string to simulate the wire. The most the string pulls out is how long you need your wire to be.

Having something to keep it out of the rotating components is good; try surgical tubing. It's easier to work with than elastic for this type of thing.

The one time my team needed to have wires move with something, it was a lift (with an arm on top, and the arm motors were on the arm), and we simply figured the max length we needed and made a pretty thick cable to run from the top of our base to the top of the lift and looped it into the robot so it hung freely.
__________________
Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons

"Rockets are tricky..."--Elon Musk

  #6   Spotlight this post!  
Unread 12-02-2009, 07:49
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: 10,792
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: How do you wire a rotating component?

alleah,
Will I be seeing you this weekend? If so we can discuss this when I see your robot. As a general rule, if you can keep the wires near the center of rotation and leave a little slack, you will be able to turn without damaging the wires. If that is not possible, something like what Jim discussed above will work fairly well. Remember that latex is robot legal and easy to use as a springy tie point for a wiring bundle to keep it out of harms way.

The slip rings shown in the post above use mercury and as such have been ruled to be illegal on our robots. There are however, legal, brush type, slip rings that are available. McMaster had a few in previous years. They are pricey but fit under the single cost rule as I remember.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.
  #7   Spotlight this post!  
Unread 12-02-2009, 08:21
lukevanoort lukevanoort is offline
in between teams
AKA: Luke Van Oort
no team
 
Join Date: Oct 2005
Rookie Year: 2005
Location: Waterloo, ON, Canada
Posts: 1,873
lukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond reputelukevanoort has a reputation beyond repute
Send a message via AIM to lukevanoort
Re: How do you wire a rotating component?

Quote:
Originally Posted by Al Skierkiewicz View Post
The slip rings shown in the post above use mercury and as such have been ruled to be illegal on our robots.
That isn't quite right, they have been ruled legal in this year's competition: http://forums.usfirst.org/showthread...hlight=mercury. (I believe there were similar Q&As since at least '06, but I never really paid them much mind - my team always used the bundle as close to centre as possible approach)
__________________
Team 1219: 2009 - Mentor
Team 587: 2005 - Animator, 2006-2008 - Team Captain
  #8   Spotlight this post!  
Unread 12-02-2009, 08:26
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: 10,792
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: How do you wire a rotating component?

Sorry,
I hadn't seen that question. In the past, this coupling was considered hazardous as a robot collision could open the coupler and expose the mercury. The coupler has some very strict handling and mounting instructions that must be followed. I will make sure the Inspection team is made aware of the answer.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
How do you wire up the Operator Interface? iPilipino Electrical 6 22-01-2008 00:22
How do you wire the wheel encoders? Demothesis Electrical 2 17-07-2007 16:59
how do you wire the team light coolguybigt Robot Showcase 2 21-02-2007 22:18
How do you wire a limit switch? JMH Electrical 1 16-02-2005 17:44
How do you wire ADXRS150EB gyro? MaxM Electrical 2 16-02-2004 13:43


All times are GMT -5. The time now is 04:11.

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