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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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| | Re: drawbridge
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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 (...) (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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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 (...) (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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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 (...) (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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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 (...) (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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| | Re: drawbridge
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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 (...) (21 years ago, 29-Apr-03, to lugnet.technic, lugnet.trains)
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