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(...) This is certainly true - but when I think "I need more I/O" - I also think "I/O should be modular and infinitely expandable". I don't want *any* practical limit to the number of motors and sensors. A mere 'Mark II RCX' with (say) 5 inputs and (...) (25 years ago, 28-Oct-00, to lugnet.robotics)
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| | Re: Using one motor to do 2 things...
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(...) I build these and it solves all my problems for all motors and sensors... (URL) the link to build and see what it's about... (...) Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (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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Could you do something with this trick? (URL) (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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The approach I would take would be to use a splitter (ratchet or worm) and make one output shaft a gear selector for a transmission, and the other shaft the input power for the transmission. The transmission design would be tricky, because the (...) (25 years ago, 27-Oct-00, to lugnet.robotics)
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| | Re: Semicolon (;) Confusion
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John, Thanks for that answer. That same question has haunted me for some time. -- Bob Fay rfay@we.mediaone.net The Shop (URL) A. Tamplin" <lego-robotics@crynwr.com> wrote in message news:Pine.A32.3.91.1...net.com... (...) syntax (...) below. (...) (...) (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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I don't know if this will help, but i'm currently working on a device that lets one motor drive four seperate axles. Downside is that it's one direction only, and only one axle can be used at one time. Howerver, you could use an extra gear to make (...) (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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(...) 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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