Subject:
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RE: My Ambulators
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 18 Jan 2002 01:14:57 GMT
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Original-From:
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Russell C. Brown [RR-1] <rcbrown@austin.rr(NoSpam).com>
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Reply-To:
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<rcbrown@austin.%stopspam%rr.com>
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Viewed:
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692 times
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I used the datalog to upload a batch of data to the PC and then used Excel's
import to make it into a spreadsheet. It was easy and worked well. I used
the spreadsheet to precisely characterize my motors so that I could match
motors to each other in symmetrical situations (like a a robot with two
motors driving one wheel each).
On the subject of custom rotation sensors, the Cybermaster kit has some
funny yellow gears that are used to drive treads. These are different from
the Mindstorms-style tread wheels in that they will mesh with each other as
gears. These gears have much larger, widely spaced teeth that might be more
suitable for the custom rotation sensor described below. For that matter,
the big gears from the early 70s sets (the ones with peg-like teeth) might
be even better, though they would look SO gauche....
I'll chime in as one of those software developers who enjoys the tactile
gratification of MindStorms more than the programming!
--Russ
-----Original Message-----
From: Nathan Nesbit [mailto:nathann@windows.microsoft.com]
Sent: Thursday, January 17, 2002 11:38 AM
To: Rob Reed; lego-robotics@crynwr.com
Subject: RE: My Ambulators
Why does the datalog not work for you?
-----Original Message-----
From: Rob Reed [mailto:robert_hilman@hotmail.com]
Sent: Wednesday, January 16, 2002 11:28 PM
To: lego-robotics@crynwr.com
Subject: Re: My Ambulators
Using the programming environment that comes with Mindstorms is a little
frustrating in that I want to simply capture data streams in a data file
and dump it to, say, a spreadsheet.
What I've found myself doing is using the LCD window on the rcx module
to get a visual on a reading (say, rpm or temp) over a fixed time
interval, then writing it down on a sheet of paper, one row of data for
each condition.
I am sure that there is a more elegant way to do this, perhaps storing a
series of data points into variables in the system, but there is still
the problem of output.
I find myself smiling and agreeing with Brian in that I spend enough of
my life in front of a computer already, and the joy of tangible
mechanical creation often overides the urge to program.
-Rob
In lugnet.robotics, Brian Sadowski writes:
> Well..I did kinda, Some foreground information is needed before I can
> explain that. The lego touch sensors arent simple toggle throw type
> switches, they have a precision, where the touch sensor can have values
> ranging ( for example ) 0 to 100, where 0 is no touch at all, and 100
> is fully depressed.
>
> The 16 tooth double bevel gear doesnt completely depress the switch. In
> theory you could use the RAW touch sensor data to determine when each
> tooth of the gear makes contact with the sensor.
>
> I work as a programmer for a living, so I dont like getting into the
> programming part as much as the pure mechanical building of the legos,
> so I never wrote a program to determine if that rotation sensor
> actually works, or how reliable it is, therefore its just theoretical (
> hopefully I spelt that one right ). I'd would love to see someone write
> the code to determine if this actually works.
>
> Hope that helps.
> -Brian
>
>
> > did I conclude it right that you made a
> > rotation sensor with the normal lego switch ?
> > If so, great (because finally we've a destination for that terrible
> > sensor), does it work well ? If not so (maybe also great) but what is
> > it ? Stef Mientki
--
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Message is in Reply To:
 | | RE: My Ambulators
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| Why does the datalog not work for you? -----Original Message----- From: Rob Reed [mailto:robert_hilma...tmail.com] Sent: Wednesday, January 16, 2002 11:28 PM To: lego-robotics@crynwr.com Subject: Re: My Ambulators Using the programming environment (...) (22 years ago, 17-Jan-02, to lugnet.robotics)
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