Subject:
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Re: ABB irb340 PickMaster
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 31 Jan 2001 22:54:09 GMT
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Viewed:
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1103 times
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"Ralph Hempel" <rhempel@bmts.com> wrote in message
news:NEBBIJADEJHLFJDEHFKDCEIACMAA.rhempel@bmts.com...
> > http://www.oxford.net/~hendryjr/temp/ABB340/
> This looks like a perfect opportunity to try using the servo
> circuit I designed! If I use some of the heavier duty servos
> I have in my stash, it could probably go direct drive.
> <http://www.hempeldesigngroup.com/lego/servos/index.html>
Ralph,
I'd love to try using servos sometime; but until I can find a practical way
to get more than two positions, I think I'm going to have to stick to using
LEGO gearmotors with potentiometers... :(
Iain
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Message has 1 Reply:
 | | Re: ABB irb340 PickMaster
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| (...) The problem is that servo's are driven by signals that are considerably narrower than the 1/100th second resolution timers that the Lego firmware provides. They use pulse-width modulation - so the width of the pulse determines the position of (...) (24 years ago, 1-Feb-01, to lugnet.robotics)
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Message is in Reply To:
| | RE: ABB irb340 PickMaster
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| (...) Iain, This looks like a perfect opportunity to try using the servo circuit I designed! If I use some of the heavier duty servos I have in my stash, it could probably go direct drive. Each servo has a 180 degree range of motion, which might be (...) (24 years ago, 31-Jan-01, to lugnet.robotics)
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