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(...) Hello, interesting design and quite simple, but like Larry pointed out, no matter what is the position of "A", if you set "B" to turn, you get a short. Leave "B" to strait amd when a train come to "B", it will push the alingment to pass and (...) (20 years ago, 10-Aug-04, to lugnet.trains, FTX)
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(...) That, as I see it, is the idea. The point B is always set straight. There may be momentary short(s) when the motor pushes it to curve to pass, but once it is past and stops, switching A then supplies it with current, now in the opposite (...) (20 years ago, 10-Aug-04, to lugnet.trains, FTX)
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(...) Note that these deliberate, if momentary, shorts may *possibly* have a long term negative effect on your controllers. This would probably not work well with regular Model Railroad gear, but then it's not designed to take the abuse that kids (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) Hi Larry and Ross, I want to be sure I'm understanding this correctly: The simple act of pushing through the points won't cause the short. In other words, if you push a car with regular wheelsets through the points it won't cause the (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) Shorting the power should have no effect at all on the motors. It's the controller that people are worried about. And these should be fine as well. The circuits are short circuit protected for short durration, and as long at the controller (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) Yes, that is correct. The electrical contact is not made by the switching section of rail. I doubt you would cause any damage to the motors - any damage would be to the controller. They seem to be pretty tolerant electrically, but as Lar said, (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) Ha, I knew I'd get something wrong. Of course it would be the controller getting stressed and not the motor. Either way, I'm not interested in stressing anything I don't have to. Thanks ROSCO (and thanks Mat for your reply as well) Regards, (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) I'm not a big Train-head, so I'm trying to figure out where the problem is from various bits of this discussion. Is the problem that one pair of wheels is connected to power flowing in one direction and the other is connected to power flowing (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) I suggest you read up on reversing loops for some background. There are plenty of references out there if you use Google to look. But, failing that, and also for the benefit of the rest of the readership... Consider an ordinary reversing loop (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) Neither. The electrical pickup on the train motor picks up power from both axles. So when one axle has traversed B to the short section of track, the power pickup will connect the outside rail right through the loop, shorting the controller. (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) Well yes, but not because the short switched track segment is displaced - the electrical routing is not done through that, but via contacts hidden inside the switch, which don't get displaced. The short is caused by the electrical pickup in (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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| | Re: Reversing Loop without Insulated Tracks
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In lugnet.trains, Larry Pieniazek wrote: SNIP (...) Hi Folks, For what it's worth, this is the layout w/ reversing loop I was playing with. As always, I'm limited in size to something that fits on the big kitchen table I use for train layouts. I (...) (20 years ago, 11-Aug-04, to lugnet.trains, FTX)
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(...) Eh, I'm more interested in the electrical puzzle than the trains running on it. Besides, I was considering the possibility that a motor might be set up with two input leads and two output leads that would cause skipped poles if only one pair (...) (20 years ago, 11-Aug-04, to lugnet.trains)
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(...) Many of us are more interested in the trains running (remember that the name of the group, after all, is not lugnet.electrical). The electrical stuff is just a way to get trains to do their thing, in my view and hence, less interesting. Others (...) (20 years ago, 11-Aug-04, to lugnet.trains)
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(...) Thanks for the reminder, I forgot about that. So random single wheelsets won't impact this, only bridging from one wheelset to another within the motor (or if you connect motors to get better pickup performance as Mark Bellis does, across (...) (20 years ago, 11-Aug-04, to lugnet.trains)
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(...) Well, ok, not THAT hard: (URL) from THIS great reference: (URL) (20 years ago, 11-Aug-04, to lugnet.trains)
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(...) Yeah, I kinda figured that out on my own, thanks. I just felt it would be prudent to point out that I am not one of those people, so that I wouldn't be the subject of false assumptions. Well, no more than usual, at least... (...) Considering (...) (20 years ago, 12-Aug-04, to lugnet.trains, FTX)
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(...) (snip) (...) I have to say that I am the opposite of dismissive in this case. I didn't follow most of what was said (electricity-wise) during this discussion. I'm a pretty bright guy, but for some reason, electronics make my brain hurt. I'm (...) (20 years ago, 13-Aug-04, to lugnet.trains, FTX)
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(...) (snip) Ouch. Rick Clark FUT lugnet.off-topic.debate (20 years ago, 13-Aug-04, to lugnet.trains)
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(...) OK, I consider myself part of the overlap, even though I'm across the pond! I have books on model railway wiring, as not many people can do it all in their heads. If you are able to get international second-hand books on the net, try "The PSL (...) (20 years ago, 13-Aug-04, to lugnet.trains, FTX)
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(...) Same here...I invite electrical experience and techincal discussion as well. (...) We need the insight from crossover indivuals such as yourself, David. Thanks for the contribution and hanging in there as you designed a way over the hurdles (...) (20 years ago, 13-Aug-04, to lugnet.trains, FTX)
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