View Single Post
  #34   Spotlight this post!  
Unread 10-09-2004, 12:53
Madison's Avatar
Madison Madison is offline
Dancing through life...
FRC #0488 (Xbot)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1999
Location: Seattle, WA
Posts: 5,243
Madison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond repute
Re: pic: 6 speed?? Great in theory - lets see how it works!

I'm going to chime in on the side of people who know a lot more about these things than I do and agree that a ball screw seems like the best option for shifting to multiple positions. However, since I despise programming and electronics, I'm hesitant to rely on switches and sensing devices to accurately place the shifting collar within the gearbox. That's not to say it's impossible to do it, but only that I do not have the experience to make it work myself.

Instead, to reduce the accuracy in rotation needed by a conventional motor to spin a ball screw and accurately position the shifting collar, you might consider using a geneva mechanism (see also) as an interface between the shifting motor and the ball screw. An indexing device such as that should help to alleviate concern about the shifting collar's position.

Also, it's really cool.
__________________
--Madison--

...down at the Ozdust!

Like a grand and miraculous spaceship, our planet has sailed through the universe of time. And for a brief moment, we have been among its many passengers.
Reply With Quote