Subject:
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Re: Reversing Loop without Insulated Tracks
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Newsgroups:
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lugnet.trains
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Date:
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Wed, 11 Aug 2004 02:35:17 GMT
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Viewed:
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1316 times
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In lugnet.trains, Larry Pieniazek wrote:
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In lugnet.trains, Ross Crawford wrote:
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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)
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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 give LEGO trains.
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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 direction, thus the train continues out of the loop.
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really neat trick though!
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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 electrical connection to switch from the straight to the curve or vice
versa. The problem is only when the motor pushes through. This is because the
motor has two wheels on each side that are directly connected to each other
inside the motor. When one of these wheels makes it to the straight part while
the other is still in the curve you’ll end up with a momentary short inside the
motor. This is caused by the fact that the two wheels on each side are directly
connected.
Is this correct? I recently tried a similar setup for a reversing loop that
worked on the same principle as this one. I thought I could always avoid a
short by careful switch settings but hadn’t realized this issue with the motor
causing the short until I read this thread. I think I’ll stop doing it now
since I’m not interested in shorting the life of my motors.
Thanks,
Paul
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Message has 2 Replies:
 | | Re: Reversing Loop without Insulated Tracks
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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)
| | | Re: Reversing Loop without Insulated Tracks
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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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Message is in Reply To:
| | Re: Reversing Loop without Insulated Tracks
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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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