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7493  |  7495
Subject: 
Re: Even more Wow!! for your buck!!! was Re: Woo Hoo!!!!! (part deux...)
Newsgroups: 
lugnet.org.ca.rtltoronto, lugnet.trains
Date: 
Mon, 2 Jun 2003 21:26:10 GMT
Viewed: 
1082 times
  
In lugnet.org.ca.rtltoronto, Larry Pieniazek wrote:
In lugnet.org.ca.rtltoronto, Brian H. Nielsen wrote:
In lugnet.org.ca.rtltoronto, Larry Pieniazek wrote:
In lugnet.org.ca.rtltoronto, David Koudys wrote:

<snip>

Regarding reverse loops and DCC I seem to recall that it's possible to
automate them so you don't have to cut gaps that the motor has to coast
across

See this track diagram

http://members.shaw.ca/sask.rail/dcc/loop.html

   I'm not up on DCC, but with normal track it is normally done by having the
loop divided into 2 power blocks,

That diagram is divided into two blocks. One for the approaches, and one for the
reverse loop itself. That's standard wiring, been done that way since I was a
wee lad, there's no need to divide the reverse loop itself into two blocks.

With conventional control  (for example the old ATLAS line of components) you
reverse the loop block to match which way the train enters and while the train
is in the block, you reverse the approach block.

   Okay, yeah, my memory of what I too used to do years ago got cross-wired.

   Then I guess I don't understand the set-up that is causing his need for a gap
to be crossed.  Is it a DCC related issue or simply him not reversing the
polarity of the approaches while in the loop?

Brian H. Nielsen



Message has 1 Reply:
  Re: Even more Wow!! for your buck!!! was Re: Woo Hoo!!!!! (part deux...)
 
(...) The latter I think... by having a truck long gap, the motor coasts across the gap but never shorts out from one wheel set to the other, once it hits the powered side again (even though the polarity is reversed) it just continues on. This is (...) (21 years ago, 3-Jun-03, to lugnet.org.ca.rtltoronto, lugnet.trains)

Message is in Reply To:
  Re: Even more Wow!! for your buck!!! was Re: Woo Hoo!!!!! (part deux...)
 
(...) That diagram is divided into two blocks. One for the approaches, and one for the reverse loop itself. That's standard wiring, been done that way since I was a wee lad, there's no need to divide the reverse loop itself into two blocks. With (...) (21 years ago, 2-Jun-03, to lugnet.org.ca.rtltoronto, lugnet.trains)

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