Go to Post We haven't yet been able to find the A-team, but if we do... well, I pity the fool. :) - Madison [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
  #39   Spotlight this post!  
Unread 11-09-2004, 10:18
Sean Schuff's Avatar
Sean Schuff Sean Schuff is offline
Year 18 in FRC!
FRC #0093 (N.E.W. Apple Corps)
Team Role: Teacher
 
Join Date: May 2003
Rookie Year: 2000
Location: Appleton, Wisconsin
Posts: 316
Sean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond reputeSean Schuff has a reputation beyond repute
Re: pic: 6 speed?? Great in theory - lets see how it works!

I hope this comes across as a simple explanation for the 6-speed transmission - you know how us teachers can complicate even the simplest of things!

First off, I've posted a new picture of only the gear reduction system of the transmission. The first gear (top red) on the primary shaft (on the left) is an initial input- from the CIM and drill motors. It is a 1.25:1 reduction from the gear on the CIM motor.

From the first double gear there is a simple tranisition of 1:1 to the first double gear (top blue) on the secondary shaft on the right. The overall reduction from the original input is now 1.25:1.

The first doulble gear on the secondary shaft reduces the speed (1.67:1) back to the second red gear on the primary shaft. Overall reduction at this point is now 2.0875:1

The second primary red gear transitions back to the second secondary gear at 1:1.

The second secondary gear reduces back to the third primary gear at 1.67:1. Overall reduction to this point is now 3.486:1.

The reduction continues down the system to the sixth gear.

The gear on the hexed output shaft (shown in the original picture) slides across the six blue double gears and engages at each one of them to provide six different output speeds.

Friction, while a concern, is negligible since all of the gears on the gear train (red and blue) are pressed on bearings and rolling rather freely. Granted the friction between the gears from one end to the next creates quite a bit of friction, I don't think it will be a huge concern. Like I've said before, we're going to start with a two-speed variation and work up from there.

I hope thsi explains how this system works a little better. Once you understand the stair-stepping concept between the gears, it is easy to see how you can set this up with as few or as many speeds as you need without great modification.

I will keep you all posted as we progress with the fabrication, construction and testing. I will also update the model to include gears with actual teeth so it is easier to see what meshes with what and how it all plays together.

Sean
__________________
Every child. Every program. Everywhere.

Thanks Plexus Corp. for two decades of partnership and counting...your company gets it!!

www.nacteam93.com | Tesla Engineering Charter School
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
Joining 2 dif. motors K.Shaw Motors 32 14-10-2004 19:40
pic: Mock Competition at SWAMP WORKS CD47-Bot Extra Discussion 1 06-06-2004 19:44
PID control loops - closed loop feedback KenWittlief Technical Discussion 56 26-04-2004 21:27
pic: dual speed gearbox CD47-Bot Extra Discussion 9 07-10-2003 15:04
pic: Wouldn't that be great? CD47-Bot Extra Discussion 2 28-04-2003 12:25


All times are GMT -5. The time now is 03:02.

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