Making a Shinohara Double Crossover DCC Friendly.greenspun.com : LUSENET : Wiring for DCC : One Thread
Does anybody have a schematic of how to make a Shinohara double crossover switch DCC friendly? Where to gap and so on.
-- Larry Eyman (firstname.lastname@example.org), August 12, 1998
I haven't been on AOL in years. Unfortunately, there are still a multitude of links out there going to my old site. Here is the URL that contains the double crossover.
Make sure you have an old style crossover. Walthers is coming out with DCC Compatiable (Friendly) turnouts.
For future reference bookmark http://www.WiringForDCC.com
Since I own this domain, have no fear, it will never change.
-- Allan Gartner (email@example.com), June 06, 2004.
You can look at the double crossover, just like 4 seperate turnouts as far as the points are concerned. Just follow Allan's pages to make these DCC freindly.
As far as adding any gaps, this will depend on track polarity of the parallel tracks, and also if it is in a situation like in a dog bone convereration where crossing over will form a reverse loop.
For the most part it is just a matter if you throw all 4 turnouts at the same time, or only the two oppositing turnouts, to keep the frog crossing rails at the same polarity. As far as the case of forming a reversing loop or section, then you only have to cut gaps on the two outside through rails of the crossover it's self.
Remember Always Have Fun and Enjoy!, Don Crano Akron, Oh NMRA #096211 mailto:firstname.lastname@example.org Visit Model Railroading with DCC at: http://pages.sssnet.com/donc/
-- Don Crano (email@example.com), August 15, 1998.
I have uploaded a drawing of the Walthers (Shinohara) code 83 double crossover showing how to make it DCC friendly to my Wiring for DCC web page. It can be found at http://members.aol.com/locochaser/switches.htm
I know a lot of people are interested in see this so please help spread the word.
In the process of determining what needed to be done, I noticed that Shinohara did not use a single pivot between the points and closure rails. This makes the conversion much simpler than their individual turnouts.
This double crossover probably applies fairly well to those made by other manufacturers. If those made by other manufacturers use a single pivot between the points and closure rails, you will need to eliminate them. See the drawing for that manufacturer's individual turnout on my web page.
Note the point of crossing. When the turnouts are thrown for crossing, most of the rails in the vicinity of the cross have the correct polarity and those nearby do not have the incorrect polarity - which means a short is possible. There are two points in my drawing where this is not true.
I have left these points alone since it would require cuts in the rail and soldering to very short pieces of rail. Whenever soldering rail, deforming the plastic is possible. Short pieces of rail may become misaligned. So by eliminating a possible short, you may be creating a derailment.
Therefore, be sure all turnouts contain light bulbs as shown or some other method of localizing the influence of shorts on the rest of your system.
In order that the drawing be viewed on people using low rez monitors, I have turned the drawing vertical allowing it to be long and as big as possible. Let me know if anyone still has trouble viewing it.
Allan Gartner "Wiring for DCC" http://members.aol.com/wire4dcc/index.htm
-- Allan Gartner (firstname.lastname@example.org), April 02, 1999.
the AOL webpage that is supposed to show the diagram does not load
-- Sean Blanck (email@example.com), June 03, 2004.