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 02:49:08 GMT
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Viewed:
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1634 times
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In lugnet.trains, Ross Crawford wrote:
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In lugnet.trains, Paul S. D’Urbano wrote:
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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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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.
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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, continued shorting, even if momentary, may
eventually cause damage.
ROSCO
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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,
Paul
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Message is in Reply To:
 | | 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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