Go to Post The thought of destroying any robot is just......depressing :( - Richard McClellan [more]
Home
Go Back   Chief Delphi > Other > FIRST Tech Challenge
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #12   Spotlight this post!  
Unread 24-01-2009, 09:33
jbbjjbt jbbjjbt is offline
VRC Coach
AKA: Jon T
VRC #0177 (Twisted Botz)
Team Role: Coach
 
Join Date: Feb 2006
Rookie Year: 2004
Location: Gloucester, VA
Posts: 110
jbbjjbt is an unknown quantity at this point
Re: [FTC]: Do Servo's reset during start up?

Quote:
Originally Posted by PhilBot View Post
When power is applied to the servo controller the servos get a momentary glitch which makes them twitch, but they are not held in that position.
Then unless you send a servo command the servo will just stay where you put them ( by hand ).
In labview, servo commands go from 1 - 255. A servo position of 0 means go to the last commanded position. Once you send a servo command, the servo goes there and holds that position. If you don't issue another command for a few seconds, the servo will power down.
Do you agree that the momentary glitch at power up sends them toward the middle 127 (or 8) ?

This is enough to cause issues with buckets dumping or arms unfolding. Setting them to position ahead of time in autonomous may be bad if it takes a long time for the match to start.
__________________
Jon Thompson
Coach
VRC 177 Twisted Botz
Sponsored by FRC 122
NASA Knights
Reply With Quote
 


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
[FTC]: Non-technical topics during interview ManicMechanic FIRST Tech Challenge 0 28-12-2007 00:53
[FTC]: [FTC]: Ontario Provincial FTC Start/End Times cbhl FIRST Tech Challenge 8 16-12-2007 13:37
Camera won't initialize when reset from RC - reset from OI and Power-up works, krunal Programming 7 15-01-2007 00:13
In a Pickle: Servo's stay at 127 vector023 Programming 11 14-02-2006 17:54
Servo's and EduBots? DanL Motors 6 13-01-2003 10:11


All times are GMT -5. The time now is 17:59.

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