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(...) Try braking. This is from memory so might be all wet... If you just turn power off, the motor coasts to a stop. But supposedly you can send the motor a speed 0 command, I think, and the motor stops right then, frozen in place. It takes more (...) (20 years ago, 18-Dec-04, to lugnet.trains)
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| | Re: Grade Crossing Signal Thingy...
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(...) The way that my design ended up, that isn't an issue. The arm just goes up and down as the wheel/motor rotates. It doesn't go past horizontal or vertical positions (by luck, not design :^) ) (...) There's a weak spot in my signals above the (...) (20 years ago, 18-Dec-04, to lugnet.trains)
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| | Re: Grade Crossing Signal Thingy...
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(...) Easiest way is to have a stop of some kind at both extremeties of movement, and introduce some kind of slip into the drive mechanism, like rubber bands or a slip clutch (URL) each cycle runs the motor longer than it needs, and the clutch slips (...) (20 years ago, 17-Dec-04, to lugnet.trains)
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| | Re: Pinguim: Some very interesting techniques
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(...) I was looking at this gallery today too and was very impressed. Make yourself known! Tim (20 years ago, 17-Dec-04, to lugnet.trains)
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| | Re: Discussion of Train Table Sizes
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(...) (snip) (...) Thanks Larry. I happen to think we are working too hard but for most of us, the challenge of building something new and interesting was just as much fun as presenting and exhibiting. My preference is now for a more permanent build (...) (20 years ago, 17-Dec-04, to lugnet.trains.org)
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| | Re: Grade Crossing Signal Thingy...
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(...) One approach is to use a linkage mechanism in which the gate is driven by a link that no matter how the motor rotates, never takes the gate below horizontal or beyond directly vertical. That of course introduces other issues, such as knowing (...) (20 years ago, 17-Dec-04, to lugnet.trains)
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| | Re: Grade Crossing Signal Thingy...
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I have a couple of newbie questions about things like this. First, how do you protect the motor? In this particular design it looks like you could actually rotate the arm past vertical, which I guess isn't a problem until you hit the ground on the (...) (20 years ago, 17-Dec-04, to lugnet.trains)
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| | Worlds Greatest Hobby Show St. Louis, MO
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The Gateway LEGO® User Group (GtwLUG) is going to be at the Worlds Greatest Hobby Show here in downtown Saint Louis, MO at the Americas Center from 10:00am to 8:00pm on the 8th and 10:00am to 5:00pm on the 9th of January. The show features vendors (...) (20 years ago, 17-Dec-04, to lugnet.announce, lugnet.events, lugnet.trains, lugnet.loc.us.mo, FTX)
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| | Re: Grade Crossing Signal Thingy...
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(...) Check the previous posts on (URL) the motorized cows. These use optical sensors to trigger cow head moooovement...I'm sure they could activate a level crossing using the same RCX optical detection scheme. -Rob A. (20 years ago, 17-Dec-04, to lugnet.trains, lugnet.robotics)
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| | Pinguim: Some very interesting techniques
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I hope this builder will pop in here and discuss some of his or her work. (URL) don't think I've ever seen anyone try a BL2 before! That engine has a lot of curves and slants and is a very hard engine to model in LEGO. Although I'm not an 8 wide (...) (20 years ago, 17-Dec-04, to lugnet.trains)
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| | Re: Red Track (was: Say What???)
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(...) Already done. :) (URL) Garrison (20 years ago, 17-Dec-04, to lugnet.trains, FTX)
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| | Re: Grade Crossing Signal Thingy...
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(...) In fact for realistic operation (if you really want that!) you'd need 4 sensors, because the "exit" sensor is much closer to the crossing than the "entry" sensor in real life. But who wants realistic? This is LEGO! ROSCO (20 years ago, 16-Dec-04, to lugnet.trains)
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| | Re: Discussion of Train Table Sizes
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(...) At a UK model railway exhibition the layouts are what draw the public in, making gate money, so layout exhibitors are paid van hire and fuel expenses (reimbursed on production of receipts) and are provided with lunch each day (usually (...) (20 years ago, 16-Dec-04, to lugnet.trains.org)
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| | Re: Red Track (was: Say What???)
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(...) That's like it ! Perfect for the legendary Crystal from Japan. (URL) Part way down the page. pete.w (20 years ago, 16-Dec-04, to lugnet.trains, FTX)
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| | Re: Grade Crossing Signal Thingy...
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(...) I know Lego doesn't make those sensors. The first post in that thread though is exactly what I was looking for! Thanks! I'm not too crazy about modding Lego so I'll go with the pure version. (...) Right, I'd think you'd need a lead time of (...) (20 years ago, 16-Dec-04, to lugnet.trains)
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| | Re: Grade Crossing Signal Thingy...
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(...) You'll need more than a program, you'll need to make sensors of some sort, as sensors that detect magnets are not on offer from LEGO. Chris Phillips made some (reedswitch based, I think) sensors, and documented what he did. it requires some (...) (20 years ago, 16-Dec-04, to lugnet.trains, lugnet.robotics)
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| | Re: Grade Crossing Signal Thingy...
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Magnets, righto. How do I do that? I've spent most of today trying to put together a program for a pressure pad triggered setup, haven't had any sucess. Same with a light program. I don't have any idea how to use magnets. Do you have a program I (...) (20 years ago, 16-Dec-04, to lugnet.trains)
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| | Re: Red Track (was: Say What???)
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"Steve Bliss" <steve.bliss@earthlink.net> wrote in message news:I8tyrF.1vqr@lugnet.com... (...) mmm, needs lights! (20 years ago, 16-Dec-04, to lugnet.trains)
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| | Re: Red Track (was: Say What???)
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(...) Ack! Don't give them any ideas! "Space Train", anyone? With trans-neon-yellowgreen tracks? (URL) trans-neon-yellowgreen tracks>> Steve (20 years ago, 16-Dec-04, to lugnet.trains, FTX)
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| | Re: Grade Crossing Signal Thingy...
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Anyone have any tips on programming the crossing so it works (...) Yes, go with magnets! :) I put my programme in the RCX 3 times, each time changing the light sensor to a higher setting. It worked great the 1st time in a shopping mall, but our (...) (20 years ago, 16-Dec-04, to lugnet.trains)
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