 | | Re: Lego orrery (mechanical solar system)
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"Thomas Johnson" <aklego@mac.com> wrote in message news:HE4DMA.1Eqy@lugnet.com... (...) cause i said something without any knowledge about the current state of the orrery i missed that the moon's orbit's not coaxial with the earth's one but as i (...) (21 years ago, 30-Apr-03, to lugnet.technic)
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| | Re: Vertical lift spans (was: Re: drawbridge
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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 (...) (21 years ago, 30-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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(...) I used a single motor, with all cables being passed above the top of the span to get to the far side (4 cables). One trick that I would do if I was building another one is to make the cable drums easier to adjust to one another, since they (...) (21 years ago, 30-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: New 2003 Technic sets on S@H
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(...) They do indeed have new pieces (to almost everyone). During my frenzied visit to the Toy Fair showroom, I spotted what I believed to be a new Technic piece (though I later found out that it's available in at least one Spybotics set). It's a (...) (21 years ago, 30-Apr-03, to lugnet.technic)
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| | Vertical lift spans (was: Re: drawbridge
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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 (...) (21 years ago, 30-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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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 (...) (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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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 (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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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 (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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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 (...) (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: Lego orrery (mechanical solar system)
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(...) Apologies are not necessary--I agree that the moon mechanism is unsightly and I am looking for ways to clean it up for the nine planet version. Unfortunately (for orrery makers) the moon's orbit and earth's axis of rotation are not coaxial. (...) (21 years ago, 29-Apr-03, to lugnet.technic)
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