Go to Post Am I the only one who thinks robots are the main attraction of a regional, and there isn't a need for more distraction? - Adam Richards [more]
Home
Go Back   Chief Delphi > FIRST > General Forum
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
 
Thread Tools Rating: Thread Rating: 4 votes, 5.00 average. Display Modes
  #1   Spotlight this post!  
Unread 17-02-2015, 20:27
Sperkowsky's Avatar
Sperkowsky Sperkowsky is offline
Professional Multitasker
AKA: Samuel Perkowsky
FRC #2869 (Regal Eagles)
Team Role: Leadership
 
Join Date: Jan 2015
Rookie Year: 2014
Location: Bethpage, NY
Posts: 1,878
Sperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond reputeSperkowsky has a reputation beyond repute
Quote:
Originally Posted by EricH View Post
How many wraps of cable do you have around your winch? I believe the recommended number is 2-3, looks like you don't have that many.

This would be a quick, light fix, involving a longer cable and whatever you use to attach the cable to the drum/terminate the cable. That's all you'd need. Depending on your setup, attaching the cable to the winch could work very well too.
It's one continuous cable and they terminate connected to the elevator plate. There is only one cable but the way it's setup I don't know how you would use more then one cable.
Reply With Quote
  #2   Spotlight this post!  
Unread 17-02-2015, 20:30
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: 19,713
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: We need help... A lot of it

Quote:
Originally Posted by Sperkowsky View Post
It's one continuous cable and they terminate connected to the elevator plate. There is only one cable but the way it's setup I don't know how you would use more then one cable.
You don't need to use more than one. You just bring in a longer piece of cable.

As follows:
1) Unterminate one end of existing cable.
2) Terminate one end of new, longer cable where previous cable used to be.
3) Run new cable and unrun old cable along the same path, until you hit the winch drum.
4) Wrap new cable around drum about 3 times.
5) Continue #3 above until you reach the other termination point.
6) Terminate new cable (probably want to do a temporary termination here, and make it permanent later). Make sure old cable is gone.
7) Test.
__________________
Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons

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

Reply With Quote
  #3   Spotlight this post!  
Unread 17-02-2015, 20:41
GeeTwo's Avatar
GeeTwo GeeTwo is offline
Technical Director
AKA: Gus Michel II
FRC #3946 (Tiger Robotics)
Team Role: Mentor
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Slidell, LA
Posts: 3,552
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: We need help... A lot of it

Quote:
Originally Posted by Sperkowsky View Post
It's one continuous cable and they terminate connected to the elevator plate. There is only one cable but the way it's setup I don't know how you would use more then one cable.
A second cable is only needed if your lift plate is too light, or your friction is too heavy, for the lift to lower itself. As I read your posts, your first cable (pull on lift) is also your second cable (pull on lower). If this is correct, you can pretty much ignore the "second cable" posts.

Also, if this is correct (that is, your cable is doubly terminated on the chassis end), you can make your system more repeatable/reliable by adding more wraps to the shaft/axle/spool on the lift side. This basically means making a somewhat longer cable in the shop (add one or two wraps around that spool), including it in your WITHHOLDING ALLOWANCE, then replacing it on the Thursday of your competition.
__________________

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.
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 09:49.

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