 | | My latest project
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Hey folks, I've finished blogging about my latest project - Pulito. Basically a swiffer/roomba mashup that autonomously cleans hard surfaced floors. It an also seek out a charging base to recharge itself. Details: (URL) (14 years ago, 14-Nov-10, to lugnet.robotics)
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| | Re: My latest project
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(...) Nice work! It looks like it is only around 55 mm high. Is that correct? That's about 35 mm less than a Roomba. :-) Play well, Jacob (14 years ago, 15-Nov-10, to lugnet.robotics)
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| | 3D laser scanning
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(URL) A simple addition: Focusable line laser + NXT sweeping mechanism + webcam + DAVID Laser scanner software + Sculptris + Meshlab + Stl2Dat + a lot of time = LDraw parts ! (URL) A few more details> on the process I use to create organic shaped (...) (14 years ago, 17-Nov-10, to lugnet.announce, lugnet.cad, lugnet.robotics, FTX) !!
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| | Tetrix
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We started a new project with Tetrix, a new NXT-compatible robotics kit available at LEGO Education. Very cool stuff! More to come. Visit the lab-journal at: (URL) (14 years ago, 18-Nov-10, to lugnet.robotics)
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| | Re: Geneva wheel or Geneva mechanism
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(...) Very nice implementation! How robust is the construction with the curved bricks? I would think this might come apart over time... Looking forward to seeing the GBC application! (14 years ago, 26-Nov-10, to lugnet.technic, lugnet.robotics)
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| | "Lobster" - Mecanum wheel car drives in any direction
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Here is something I've been wanting to make for a long time, finally made possible by an amazing design for "Mecanum wheels" due to Zblj over at (URL) Eurobricks>. (3 URLs) Mecanum wheels are similar to "omniwheels" except that the small wheels are (...) (14 years ago, 26-Nov-10, to lugnet.technic, lugnet.robotics, lugnet.announce.moc, FTX) !!
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| | Hispabrick Magazine 009
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It is our pleasure to announce the release of (URL) Hispabrick Magazine 009>. In this issue you you will find a wide variety of articles and interviews. Among other items, there is an interview with LDD Development Manager Claus Matthiesen by (...) (14 years ago, 30-Nov-10, to lugnet.announce, lugnet.publish, lugnet.robotics, lugnet.technic, lugnet.cad, FTX)
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| | Re: Hispabrick Magazine 009
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(...) Link should work now. (14 years ago, 1-Dec-10, to lugnet.publish, lugnet.robotics, lugnet.technic, lugnet.cad, FTX)
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| | Technic Figure LDraw model
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(URL) This (URL) post> pushed me to complete the hard work of Donal Sutter and Orion Pobursky and model the missing parts of Technic Figure. Posing the figure may be quite tricky, but thanks to the advanced rotations features of LeoCAD, it's (...) (14 years ago, 3-Dec-10, to lugnet.announce, lugnet.cad, lugnet.robotics, lugnet.technic, FTX) !
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| | Brickworld 2011 - Registration Open
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Hello everyone, We are happy to announce that Brickworld registration is now open. We have been hard at work performing a complete overhaul on the registration process. In response to your feedback in the survey after last year's event, we have done (...) (14 years ago, 7-Jan-11, to lugnet.events.brickworld, lugnet.fun.community, lugnet.announce, lugnet.general, lugnet.events, lugnet.robotics, lugnet.trains, lugnet.castle, lugnet.pirates, lugnet.space, lugnet.people, FTX) !
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| | Motors comparison page updated
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My (URL) motors comparison page> now includes tests of the E-motor from (URL) Energy Add-On Set (9688)>. (URL) Enjoy! (URL) Philo> (14 years ago, 12-Jan-11, to lugnet.announce, lugnet.technic, lugnet.robotics, FTX) !
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| | Re: Motors comparison page updated
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(...) Thank you! Surprising that with as easy as it is to backdrive, that the efficiency is as low as it is. Out of (not idle) curiosity, is it possible to drive even more current-hungry devices safely from the NXT? I need a way to drive a 120V AC, (...) (14 years ago, 12-Jan-11, to lugnet.technic, lugnet.robotics)
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| | Re: Motors comparison page updated
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Hi Brian, (...) I was surprised too. I suspect a relatively high internal resistance of the windings, rather than mechanical friction, as the source of losses. No, (shame on me!) I didn't checked yet with an ohmmeter. (...) This is clearly outside (...) (14 years ago, 13-Jan-11, to lugnet.robotics, lugnet.org.us.smart)
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| | Re: Motors comparison page updated
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(...) I've been operating outside my personal SOA for years now :) (...) It's actually not a motor - it's a small electric hot water heater element. When plugged in it produces 1300W, but if I want less than that I need to figure out some way to (...) (14 years ago, 13-Jan-11, to lugnet.robotics, lugnet.org.us.smart)
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| | Re: Motors comparison page updated
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(...) Good thing, the load is not inductive. (...) OK, with a 1 second cycle time, and pure on/off, it is simpler. All you need is a solid state relay. (...) Looks like some people do: (URL) and worse, most of these dimmers work by dissipating and (...) (14 years ago, 13-Jan-11, to lugnet.robotics, lugnet.org.us.smart)
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| | Re: Motors comparison page updated
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(...) Interesting thread, even if a bit off topic of LEGO motors. I'm not an expert on power circuits, but a google search turned up this web site with a number of interesting power supply circuits (there is a search option). (URL) Putz (URL) (14 years ago, 13-Jan-11, to lugnet.robotics, lugnet.org.us.smart)
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| | Re: Motors comparison page updated
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(...) No, purely resistive. Although it does have a "boot up" time, I think it's just due to heating up the element. I'm not completely sure if the element will respond better to a "dimmer" type set-up (running it at less than normal voltage) or a (...) (14 years ago, 15-Jan-11, to lugnet.robotics, lugnet.org.us.smart)
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| | Re: Lots of gratitude
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Dear Brahm, We know we are not supposed to do this on this forum, but we shall do it anyways because our gratitude towards you is more intense than just a 5 star rating. We have been trying to make our RIS 2.0 software and hardware work for many and (...) (14 years ago, 18-Jan-11, to lugnet.robotics)
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| | Anyone else tried the Firgelli actuators?
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I decided to spring for one of the expensive Firgelli actuators, and just gave it a quick try. I either got a broken unit, or it is the worst piece of junk anyone has ever made for NXT. First of all, you command it to move a distance, not command it (...) (14 years ago, 25-Jan-11, to lugnet.robotics)
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| | Re: Anyone else tried the Firgelli actuators?
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(...) That's something expected because the encoder is a relative position one, just like in the regular NXT motor. (...) I have not noticed that - could you send me your program? Philo (14 years ago, 26-Jan-11, to lugnet.robotics)
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