Subject:
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Re: remember the 1/n rule?
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Thu, 21 Feb 2002 00:36:07 GMT
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Viewed:
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483 times
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"David Koudys" <dkoudys@redeemer.on.ca> wrote in message
news:Gruou3.5v9@lugnet.com...
> The *real* engineers do the same job with a minimalistic attitude, for in
> the *real* world, controllers cost money, not to mention the extra
> sensors/motors!
>
> The less expensive, the better I always say.
Uh, no. :)
In real life (or at least, in any of the automation I've worked with), lead
times and simplicity of design typically take priority over actual machine
function.
IE, sure, it makes more sense to make a custom four position pneumatic
actuator, but the design time alone of something like that outweighs the
cost of slapping on a servo and programming it to move between those four
positions. Yeah, the hardware is more expensive, but the design time is
reduced so it balances out.
PLC modules can typically have anywhere between like 16 and 32 inputs or
outputs per card. The last end of arm tool I did had thirteen inputs and 8
outputs alone! It's so cheap to add another sensor, you just spec it and
bam, it happens.
Controls always tend to trail behind mechanical design and are driven by
that. With LEGO, I find, I'm always driven by control issues to try and
backpedal mechanically, and that's where I get stuck. IE, I have a
mechanically functioning robot. But the (#@*%@(*% limitations on the control
end of things make my robot 100% unprogrammable and unpossible to use,
therefore, I have no robot.
Iain
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Message has 1 Reply:
 | | Re: remember the 1/n rule?
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| (...) is this figuratively speaking to make your above point, or are you actually bringing no 'bot to the competition?? no 'bot from Iain would make me a very unhappy camper. (...) (23 years ago, 21-Feb-02, to lugnet.org.ca.rtltoronto)
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Message is in Reply To:
| | Re: remember the 1/n rule?
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| (...) Baah! more than 1 RCX communicating via anything is for people who can't handle doing everything you need to do on 3 outputs and 3 inputs! Bunch of wussies who think they need 6+ ports. The *real* engineers do the same job with a minimalistic (...) (23 years ago, 20-Feb-02, to lugnet.org.ca.rtltoronto)
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