 | | Re: drawbridge —Bob Kojima
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| | | (...) yes thank you for fixing the link. some how some extra characters got added in to the link. i will be showing this at a talent show on may 10th. i just finished it yesterday. it was such a nice day outside and i don't really have a flat (...) (22 years ago, 28-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | Re: drawbridge —Tobbe Arnesson
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| | | | | (...) And they still get added. I think there are something faulty with the configuration of your news reader. It seems to add a lot of HTML or other code to translate some carachters. Best regards, /Tobbe (URL) SPAM when e-mailing) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | Re: drawbridge —Thomas Avery
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| | | | | (...) I hope my bridge design spreadsheet worked okay for you. Your trusses look good! Nice work. Very nice! (...) I've hit a similar problem in planning out a crane. I've contemplated using two separate winches to lift the main hoist, but just like (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | Re: drawbridge —Rob Hendrix
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| | | | | | | I just got through purchasing 4 rotation sensors for that very reason for my lift bridge ((URL) - in Creations). I will be adding the 4 rotation sensors and an additional rcx to my bridge sometime this year. Out of 32 motors, I could never get 2 (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | | Re: drawbridge —Steven Arnold
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| | | | | | | | (...) the length of the wire has nothing to do with the speed. the problem is that one motor, the first one on the line, is getting most of the power. the motor at 9v, 12v or 115v that doesn't mean thats the exact amount of power that it uses, it (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | | | Re: drawbridge —Rob Hendrix
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| | | | | | | | That might very well almost hold true (I am no expert) if your motors were hooked up like: [power]--------[moto...---[motor] (parallel circuit) But I have mine hooked up like: [motor]--------[powe...---[motor] (parallel circuits) I assume one motor (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | | | Re: drawbridge —Steven Arnold
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| | | | | | | | (...) well since i was basing my theory of working with stereos and lights on my car, you have the uperhand...lol (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | | | Re: drawbridge —John Hill
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| | | | | | | | (...) I believe your are right Steven, if two identical motors were connected in an identical way they would run at the same speed provided they had identical loads. But nothing in this physical world is identical and that is why stepper motors and (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | Re: drawbridge —Larry Pieniazek
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| | | | | | | (...) In my view one of the simpler ways is to shaft connect the two motors if you can... You can hide it if you have the sort of lift bridge that has an upper connection between the two towers. It may not always work though. (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | Re: drawbridge —Steven Lane
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| | | | | | (...) Ok, here's my idea for a solution for a vertically lifting bridge. All you need is one winch connected to one lifting line. You also need one control line(running off the same motor but geared down 2:1). The lifting line goes up the first (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | Re: drawbridge —Steven Lane
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| | | | | | (...) I've thought of a simpler way of describing my system. Basically you have a rope stretched between two towers. If you pull the rope the span goes up, release it and the span goes down. The wire is connected to the lift span at both ends via (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | Vertical lift spans (was: Re: drawbridge —Ben Fleskes
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| | | | | | Not sure where to chime in, so I'll jump in here. Regarding the lifting of vertical lift spans: I've built many of these over the years and my latest version (yet to be published on the internet) takes advantage of an engineering survey done on one (...) (22 years ago, 30-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | Re: Vertical lift spans (was: Re: drawbridge —John Hill
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| | | | | | | (...) OK, this is similar, but first take a walk down to the local auto repair shop and see if you can look at a 'cats cradle' type auto hoist. Here is my description. It involves one string to lift one end of the span and another string, which is (...) (22 years ago, 30-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | Re: Vertical lift spans (was: Re: drawbridge —Jeremy Rear
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| | | | | | Well put Ben. I have seen Ben's steel bridge (and helped re-rig the cables to the pulleys after a minor anomaly), and I can attest that it is truely one of the finest LEGO bridges in the AFOL community, or in the world for that matter. It is very (...) (22 years ago, 30-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | Re: drawbridge —Bob Kojima
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| | | | | (...) your spreadsheet is awesome. it worked great for calculating the length and heights. the only small problem was that the diagonal braces on my bridge all go in one direction, which your spreadsheet does not model. so your spreadsheet could (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | Re: drawbridge —Thomas Avery
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| | | | | | | (...) I don't follow. It appears your diagonals go in both directions, mirrored about the center of the bridge: (URL) did you mean that your diagonals go from top right to bottom left (looking at the right-half of a span), and the diags on my (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | Re: drawbridge —Bob Kojima
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| | | | | | (...) my description was not that good. here is how the diagonals are on my bridge: / | \ | \ | \ | \ | / | / | / | / | \ and the diagonals in the spreadsheet: / | \ | / | \ | / | \ | / | \ | / | \ (hope my ascii art turns out ok) so only 2 of the (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | | | | Re: drawbridge —Thomas Avery
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| | | | | | (...) Yes, roger that. I get it :-) I can easily write a sheet to do that. Actually, I have one! But it's geared towards an arched bridge with suspended deck. I'll get these sheets to the public soon! -TJ (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | Re: drawbridge —Bob Kojima
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| | | | | (...) i'm using eudora to read and send to the news group. that is probably what my problem is. ¤º°`°º¤ø,¸¸,ø¤º°`°º¤...¤øø¤º°`°º¤ Bob Kojima ko@fial.com (URL) Incorporated Telecom Monitoring Solutions 4343 SW Corbett Ave Portland, OR 97201 (...) (22 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | | | | Re: drawbridge —Matt Canales
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| | | | (...) Yep.=20 (...) Whoa, buddy, not just the links -- they're everywhere :)=20 (...) Does =20 mean anything?=20 (...) Oh well. That doesn't keep it from being a cool bridge :)=20 (...) Hi.=20 (...) What's ^this stuff supposed to mean?^=20 Matt (...) (22 years ago, 5-May-03, to lugnet.technic, lugnet.trains)
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| | | | | | Re: drawbridge —William R. Ward
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| | | | (...) Those are non-ASCII characters. If your browser/newsreader displayed them correctly you would see a sort of wavy line. Since only characters between 32 and 126 are guaranteed to be printable on all screens and to pass through all kinds of (...) (22 years ago, 16-May-03, to lugnet.technic, lugnet.trains)
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