Subject:
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Re: Newbie needs Help
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 5 Jun 2006 03:17:43 GMT
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Viewed:
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2956 times
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On Sun, June 4, 2006 9:22 pm, raj wrote:
> Hi, I am a newbie and would appreciate some help. My 11 year old has just
> joined his school robotics club. He will be using set 9794 (Mindstorms for
> School with ROBOLAB 2.5.4) and has to prepare a robot for a Tug-of-War
> competition (based on FLL rules) in just 2 weeks time. This is really short
> notice! I have
> downloaded various pdf files from the net (artoflego, FLL guides etc.) as
> well as buying a digital copy of the Ferraris' book. I am at a loss as to
> how to help him beyond attempting to digest all this downloaded material as
> fast as I can. Any suggestions?
> Thanks in advance,
> Raj.
Raj
One major key to making a good Tug-of-War robot will be making it go the "right"
speed. If it goes too fast, some of the "power" will be wasted on speed. If it
goes too slow, it won't use all the power it has.
To change the speed of the robot, adjust the size of the wheels, and/or the gearing
between the motors & wheels.
When you hold the robot in place, the wheels should still spin. If they don't, the
robot is too fast. It's harder to tell if the robot is too slow.
The "right" speed will change with the weight of the robot, and the surface it's
driving on. You should find out what surface will be used, and have your son do as
much testing as possible to find the best speed.
That's a crash course. Good luck... :)
Questions?
Steve
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Message has 1 Reply:
 | | Re: Newbie needs Help
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| (...) Steve, Thanks for the tips and good wishes. Currently this is what we have: - 3 wheels driven by 3 motors. Each geared down at 15:1 - the wheels do keep spinning when the robot is held in place - very generous size limit, a 250mm cube - so no (...) (18 years ago, 5-Jun-06, to lugnet.robotics)
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