Subject:
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Logo style Turtle, anyone?
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 23 May 2001 19:48:27 GMT
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Original-From:
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Bill & Sue Margolis <WMARGOLIS@YAHOO.COMsaynotospam>
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Viewed:
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958 times
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Greetings all,
> From the parts in 1 or 2 standard RIS 1.5 kits (perhaps with the addition of
a rotary sensor), I would like to be able to create a logo-style turtle --
i.e. able to do pen up, pen down, move, turn, and so able to produce
programmed geometries.
Has anyone done this? Being new to legos (alas), I would appreciate any
design advice from any of the many experts on this mailing list.
-thanks,
Bill Margolis
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Message has 6 Replies:
 | | Re: Logo style Turtle, anyone?
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| For the pen up and down, use a gear rack assembly attachec to the pen and to a motor/guide assembly on the robot. Make it a differential drive robot with a differential linked rotation sensor found on Jonathan Knudsen (I porbably butchered that, and (...) (23 years ago, 23-May-01, to lugnet.robotics)
| | | Re: Logo style Turtle, anyone?
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| (...) of (...) Surprisingly enough, I'm currently building such a thing. I thought that nobody has already had this idea :-) Sorry no pictures yet, but I'm glad to share my approach. As Andy said, make it a differential drive. Very important: keep (...) (23 years ago, 24-May-01, to lugnet.robotics)
| | | Re: Logo style Turtle, anyone?
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| (...) Well, I have done this very thing. This was actually one of my earlier mindstorms projects. I used a differential drive and a rack and pinion pen lifting mechanism as described by another individual. The beauty of the differential drive is (...) (23 years ago, 24-May-01, to lugnet.robotics)
| | | Re: Logo style Turtle, anyone?
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| (...) Not that I know of. I wanted to do this years ago when I first got Mindstroms and quickly realized that I needed either a rotation sensor or a servo motor in order to turn each wheel a precise angle. Since that time there have been numerous (...) (23 years ago, 24-May-01, to lugnet.robotics)
| | | Re: Logo style Turtle, anyone?
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| Look at pen-drawing wheeled vehicle starting at (URL) images 02 through 07). You could modify it for pen up/down. The RIS sets have newer gear-reduced motors instead of the older fast motors shown, so you will need to change the gearing. (...) (23 years ago, 2-Jun-01, to lugnet.robotics)
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Message is in Reply To:
| | Re: Lego/RCX IRPD
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| John, Your absolute best bet is the Sharp GP2D12 because it outputs an analog voltage proportional to the distance to a detected object. However, it wants a Vcc of 4.5-5.5V so you'll need to put a regulator on it and use the well-known RCX power (...) (23 years ago, 17-May-01, to lugnet.robotics)
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