Go to Post The great thing about FIRST is that there actually are 3,000 ways to win. Find yours, and leverage it. - Siri [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
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
  #8   Spotlight this post!  
Unread 03-05-2011, 20:41
PhilBot's Avatar
PhilBot PhilBot is offline
Get a life? This IS my life!
AKA: Phil Malone
FRC #1629 (GaCo: The Garrett Coalition)
Team Role: Mentor
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Maryland
Posts: 747
PhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond reputePhilBot has a reputation beyond repute
Re: paper: Have you noticed that you don't get full speed in FTC Autonomous?

Quote:
Originally Posted by Mark McLeod View Post
I'm not buying.
You seem to be arguing against the evidence.
If Run to Position ever needs to be synchronized for left/right motors, then the design is simplest to always run as if that's the case, otherwise, additional logic (essentially yet another mode) would be required.
So your argument is that if it may sometimes need to run syncronized, then it should always allocate the overhead for it.

OK, then how does it know WHEN to run syncronized?
There is no bit for it in the Motor Controller.

http://stuyfissionfusiondevelopment....ief%20v1.3.pdf

It's not like a robot where you give it a speed, distance and turn rate and it KNOWS that the wheels need to stay synched, and calculates the correct ratios. How does the controller deal with invalid ratios eg:

If I issue a command for the left wheel to go 1000 clicks at 50% speed and the right wheel to go 1000 clicks at 100% speed, should it synch? Clearly not. One needs to run for twice as long as the other.

How about left 1000 clicks at 50% and and right 2000 clicks at 100%? Probably yes but wait... there is no explicit tie in between the two on my robot, one is a shoulder joint and the other is a batton collector. Please don't synch them... ...

So if the Motor controller IS always trying to synch, then this is an equally big problem..

Plus it's not mentioned in the manual that I can find.
__________________
Phil Malone
Garrett Engineering And Robotics Society (GEARS) founder.
http://www.GEARSinc.org

FRC1629 Mentor, FTC2818 Coach, FTC4240 Mentor, FLL NeXTGEN Mentor
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


All times are GMT -5. The time now is 23:19.

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