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(...) I think it would be very difficult to get workable bidirectional control of 2 things from one motor. However, it is quite possible to multiplex motors so you can do many more then 2 things from 2 motors. For example, you can have one motor (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Re: Using one motor to do 2 things...
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Stupid me I just thought of another problem that makes this an engineering impossiblity (I think). How to reverse directions of the left/right action? It seems making the forward/backward motion and the left/right motion on the same motor is (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Re: What is with the Technic Stormtrooper?
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I think that there was some evidence a while ago about LEGO reps reading the lists. At least they are hearing us, now we need to see if they are doing anything about it. Andy (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Re: Using one motor to do 2 things...
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Hi Jason It's a Friday night and my mind has disengaged so I've not totally thought these through, but you could try a combination of ratchets and directional gearboxes (as seen in the Unofficial guide to Lego Mindstorms by J Knudsen). Basically you (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Using one motor to do 2 things...
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Hello Mindstorms fans, I am suffering through a bit of an engineering block. Let me explain: I had an idea to build a drivetrain that will provide both front/back movement and left/right(turning) movement off one motor. My question is: is this (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Re: Semicolon (;) Confusion
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(...) NQC implements a syntax similar to C. In C, while and if statements have a single statement that is executed if the condition is true. A null statement is a valid statement, and a block of statements enclosed in {} can be substituted or a (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | (canceled)
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| | Semicolon (;) Confusion
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In some cases Mark Overmars great RCX Command Center does not flag syntax errors for incorrect use of an ending semicolon, as in the example below. Could someone please explain how semicolons work in NQC? Perhaps there is a good reason for *not* (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Re: What is with the Technic Stormtrooper?
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Wow! I am so pleased to know that LEGO are keeping an eye on how those of us, who are actually prepared to express our opinions in a public forum like this, feel about their products. I suspect that there are entirely different divisions within the (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Re: one motor- four diffrent axles
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(...) See www.ldraw.org :) It even describes how to output to povray to get a really good looking final image! bfn - Ciaran (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Re: Pawl and rachet? -- slick!
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Wow, this is very cool, I like the sliding-worngear principle, a neat hack -- and it's x2 more simplier than my design. :) Thanks for the help! (...) (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | Ignore the drawing is last post
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sorry the drawings got messed up, please ignore them (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | one motor- four diffrent axles
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I had a great idea. I'm not sure if anyone has done this before, but I have found a way to make one motor drive four (or more) axles, individually! The downside is that only one axle can be rotated at a time and in only one direction, and I'm having (...) (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | Re: Pawl and rachet?
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Hello, I designed just such a drive, using worm gears instead of ratchets. It does, unfortunately, take a tiny amout of time to shift between moving forward and spinning in place. Perhaps it will meet your needs anyway. The relevant images are steps (...) (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | Pawl and rachet?
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Hello everybody again -- thank you all for the respones, sorry I haven't gotten back to some of you who emailed me privately, I've been swamped with work. I had some great lego sets recommended to me and I'm trying to find out where I can acquire (...) (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | Re: What is with the Technic Stormtrooper?
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I am an AFOL because it is a very easy to use medium in which to construct and evolve mechanical devices - such as robotic platforms. I have bought a number of the older "high end" sets mainly to obtain the industrial quantities of parts that a true (...) (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | Re: Infrared Ranging
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Here is a program letting you play with InfraRed Ranging using the standard Light Sensor and the built in IR Communications Port. You can play around with the THRESHOLD value with 2 light sensors and see what kind of range and consistency you get at (...) (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | Re: Infrared Ranging
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"Josh Hunter" <optijosh@cs.com> wrote in message news:G318tA.LBy@lugnet.com... (...) the (...) =] Answers to all these questions can be found here: (URL) (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | RE: Its a Bird! Its a Plane! No, its an RCX!?
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Some ballpark numbers without thought to temperature and pressure. Approx lift for 1 Cu Ft helium = 1 Oz. RCX = 9 Oz. You might need two.... Motors = 2 Oz ea 4 (?) required Misc structure and balloon estimate 2 pounds? Total ( minimum ballpark) (...) (25 years ago, 26-Oct-00, to lugnet.robotics)
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| | Re: Its a Bird! Its a Plane! No, its an RCX!?
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I was thinking of making a lego dirigible as part of an R&D project at my school. We came to the conclusion that we would need a baloon about the size of a small horse to get the neccesary equipment into the air. Though I still think that it would (...) (25 years ago, 26-Oct-00, to lugnet.robotics)
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