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Subject: 
Re: Rack-and-pinion steering line tracker
Newsgroups: 
lugnet.robotics
Date: 
Fri, 7 Jan 2000 23:59:58 GMT
Original-From: 
The WordMeister <dwilcox@#nomorespam#wordsmithdigital.com>
Viewed: 
471 times
  
I spent a _lot_ of time trying to get a non-sensored R&P steering system to
work, using pulleys, rubber bands (both as drives and springs), and
you-name-it! I finally gave up, but did manage to build one with only _one_
sensor that was very effective.

See http://www.wordsmithdigital.com/mindstorms/ for a scan and my described
history of running my head into the wall. Should get you started in the
right direction--or avoid getting you started in the wrong direction.

Ironically, I've started playing with roboticizing the 8479 as well!

--Doug Wilcox

WordSmith Digital Document Services
403 VFW Drive
Rockland, MA 02370

781-871-6162
fax 781-871-6264
http://www.wordsmithdigital.com
ICQ# 24868783

- Web design (including e-commerce)
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- Desktop Publishing - Design - Scanning
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- Officially Registered in Dogbert's New Ruling Class


-----Original Message-----
From: Simon Bogaert <Simon.Bogaert@advalvas.be>
To: lego-robotics@crynwr.com <lego-robotics@crynwr.com>
Date: Friday, January 07, 2000 6:52 PM
Subject: Rack-and-pinion steering line tracker




I'm trying to get the 8479 Truck following (the edge of) a line.  It drives
around the whole room, except it doesn't follow the line (RIS 1.5 Test
Pad).  Is it possible to build a rack-and-pinion steering controlled by the
RCX without using a sensor input?  I let the steering motor return to the
center after each steering action when a certain light value (37, the one
measured at the edge of the line) is reached.  The motor steers, but
sometimes doesn't return to the center, although the edge is being crossed.

I'm using RCX code to program the steeringbecause I just downloaded nqc nd
I'm still learning.

Has anyone built such a thing without using one or more sensor inputs?

Thanks a lot in advance!

Simon






Message has 1 Reply:
  RE: Rack-and-pinion steering line tracker
 
I too spent quite some time trying to build a steering mechanism from standard Mindstorms parts. After many rebuilds I still wasn't quite satisfied. The final version actually worked pretty well, but was much too bulky (not as bulky as Doug's (...) (24 years ago, 8-Jan-00, to lugnet.robotics)

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