Subject:
|
Re: Thoughts on Turning
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Tue, 26 Jan 1999 19:51:43 GMT
|
Original-From:
|
Reno Pittner <renop@homeNOSPAM.com>
|
Viewed:
|
1026 times
|
| |
|
|
Hi All,
I'm fairly new to this list and take comfort in knowing I am not
alone as the mechanically impaired. I have been involve in robotics
for quite a few years, have a little electronic knowledge, and program
for a living. Despite a ripe old age of 48, the MindStorm RIS has
brought me into the Lego world. My wife just shakes her head. The
poor woman is so confused. Well I guess beats having an affair and
getting a sports car. Oh wait, I already have a sports car, I'll
have to rethink that affair thing :)
Back to Lego, like I said my mechanical skills are less than to be
desired. I find some of the designs quite intriguing. I have some
questions regarding various turning designs.
1) I'm not sure I understand the advantages of the fifth wheel
design being discussed. I mean, why four wheels for forward
motion. It seems a two center wheel with front and back coasters
would accomplish the same thing on a smooth surface and is less
complicated for turning.
2) The adder/subtractor differential. In a human controlled tracked
based system, operation is controlled by switching the individual
motors on and off. Motor speed is consistent to both through a petal.
Actually this is a single motor with gearing for each track. In a
a two motor system the adder/subtractor makes perfect sense.
This method does not allow for smooth turning such as an arch. If
the motors are controlled by speed, equal = straight, on motor
greater than other = arch turn, one fwd one rev = turn in place
I don't see the need for the differential as you are controlling the
tracks. I don't think it will hurt but don't see the benefit. Please
someone enlighten me. I just know this has to be a good thing.
Thanks,
Reno
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
|
|
Message has 2 Replies:
 | | Re: Thoughts on Turning
|
| The problem is that the most common configuration used in Lego designs is to have one motor turning one direction and the other turning in the opposite direction (so, the motor controlling the right track is rotating clockwise and the left track (...) (26 years ago, 26-Jan-99, to lugnet.robotics)
| | | Re: Thoughts on Turning
|
| (...) You don't even ned two caster wheels, just one works fine. This is what I've been doing on my robots. You just need to make sure that your main wheels aren't at the center of gravity (or close enough to it for the robot to flip over). (...) It (...) (26 years ago, 26-Jan-99, to lugnet.robotics)
|
Message is in Reply To:
| | Re: Thoughts on Turning
|
| If your looking for examples and sources I think pretty much every one on this list has something on his website. CU Bert Visit my site on Lego, Robot's and Visual Basic at (URL) bericht----- Van: The Clark Family <clark@bess.net> Aan: alex wetmore (...) (26 years ago, 25-Jan-99, to lugnet.robotics)
|
8 Messages in This Thread:
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
