Jim, PLEASE change the turnout to place the short rail ABOVE the longer one so that any car or engine's wheels could actually be routed to the side track. Thanks, JWH
Paul,
Thanks for the kind words. They were done using a program called Visio professional.
Jim
Jim, your diagrams are terrific! Nice of you to take the trouble to so clearly illustrate the systems. Pic's are worth 1K words.
Paul
Modeling HO with a transition era UP bent
Here is a diagram using Atlas Selectors:
Actually there is a third option. One can use the common wire arrangement and just use 1/2 of the DPDT switch, in effect making it a SPDT.
Side note: I actually prefer DPDT, since it allows for complete circuit isolation. While i know that SPDT + common wire allows for lower overall costs, it does present a bit of a complicating factor when troubleshooting a short comes into play.
To the OP though: Lacking center off *may* be an issue if switches are the "make-before-break" type. This could cause a power pack to power pack short :/
If the switches are "break-before-make" type, then you can over come the lack of center off by using one of the switches as an ON/OFF for the block, and then a second switch for the CAB select.
I'm away from my home computer or I'd whip up a quick schematic.
Cheers!
Dave Loman
My site: The Rusty Spike
"It's a penny for your thoughts, but you have to put your 2 cents in.... hey, someone's making a penny!"
KGILL,
Look at SOO,Lines diagram,,study it,,,,,,then read TZ's response,,,your answer for your question,has already been explained..
Cheers,
Frank
You can also use DPDT switches. The difference is that there would not be a "common" wire. There would be two wires from each switch to each section of track. And two wires from each power pack to each switch.
The center off position allows you to park engines anywhere on the layout and still use both power packs elsewhere.
Sensei,
Please tell me more. I want to use more than one power pack. so the center off switch is needed, why do i need power on-off-on feature of the switch?
thanks,
Grasshoper
If you are only using one pack, they will allow you to park or power down engines in each block.
If you want to use more than one power pack they will not work. You need the center off pole switch as shown:
I got a great deal on a bulk supply of switches so I bought a bunch of great toggle switches that are just on and off. No middle position.
Does it matter which type I use? I cant seem to get a clear discussion of that topic.
I am wiring blocks in my 4x8 layout and thought all i need to do it turn power on or off to each block.
Please enlighten me :)