Subject:
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Re: Roboarm from Dave Baum's super book
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Thu, 30 Dec 1999 22:09:52 GMT
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Viewed:
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1220 times
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In lugnet.technic, Dave Baum writes:
> In article <FnKJw5.1xC@lugnet.com>, "Tim Wilkins" <Tim.Wilkins@zurich.com>
> wrote:
>
> > I wonder if someone can help me on a little problem with Roboarm.
> > I have built it, programmed it and it runs OK except the the arm does not go
> > down far enough to pick up.
> > I have measured the shortfall in distance and it is exactly the height of • the
> > base.
> > It is probably my bad building......has anyone else had this trouble ?
>
> The arm itself should be just about level in the "down" position. If its
> level but the grabbers don't reach the table, then there's probably
> something wrong in the grabber assembly (or how the arm is attached to the
> base). If it isn't level, then the touch sensor may not be detecting its
> position correctly.
>
> You may want to take a look at Figure 19-15 and make sure that you have a
> grey half-peg and a black 1x2 brick attached to the 1x10 beam. If the
> brick is missing, the arm probably won't raise high enough. If the
> half-peg is missing, it won't lower properly.
>
> I hope this helps.
>
> Dave Baum
>
> --
> reply to: dbaum at enteract dot com
Brilliant...it was the little half-peg. I was never very good at the "spot the
difference between the two pictures" game. Thanks for writing a great
book....it is so much better than the O'Reilly one. It hit Europe last week !
Maybe you should think about a full colour edition for next print run.
regards
Tim Wilkins
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Message has 1 Reply:
 | | Re: Roboarm from Dave Baum's super book
|
| (...) I'm glad you like the book. Yeah, that half-peg was a problem for at least one of our tech reviewers (beta test team). If we do another book I'll probably start using inset boxes that list how many of each piece per step. That way if you (...) (25 years ago, 31-Dec-99, to lugnet.technic, lugnet.robotics)
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Message is in Reply To:
| | Re: Roboarm from Dave Baum's super book
|
| (...) The arm itself should be just about level in the "down" position. If its level but the grabbers don't reach the table, then there's probably something wrong in the grabber assembly (or how the arm is attached to the base). If it isn't level, (...) (25 years ago, 30-Dec-99, to lugnet.technic, lugnet.robotics)
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