Newsgroups: comp.robotics
Path: brunix!sgiblab!spool.mu.edu!howland.reston.ans.net!swrinde!news.dell.com!tadpole.com!uunet!timbuk.cray.com!driftwood.cray.com!kilian
From: kilian@cray.com (Alan Kilian)
Subject: Re: Gears and gear ratios
Message-ID: <1994Jul21.192118.11797@driftwood.cray.com>
Lines: 25
Nntp-Posting-Host: poplar010
Organization: Cray Research, Inc.
Date: 21 Jul 94 19:21:18 CDT


Someone suggested a more efficient gear ration then mine that gave
the exact gear ratio needed, but there are two problems.

1) They don't make gears with the required number of teeth in my book.
2) It's tough to use either a very small or very large number of teeth.
   The example used a 16 tooth gear which is quite a small number of teeth.
   Since we like to use gears with a small tooth size, the 16 tooth gear
   is very small. The example also used a 100 tooth gear which gets quite 
   large and might be a problem also.

You are best sticking with gears from 24 to 70 teeth. You can get them
and they don't get too small or too large.

But if getting the exact ratio is important then do whatever you need
to do to get it. 

And use the minimum number of gears to do it as the poster pointed out.

                    -Alan Kilian

-- 
 -Alan Kilian    kilian@cray.com 612.683.5499 (Work)
 "In 1969 We went to the moon and there was no air and only a bunch of
  dirt and WE LOVED IT!" -Tim Whitley talking about kids today and Apollo.
