We're using Gargraves track and Ross turnouts on the layout and Tortoise machines. Insulated rail triggering could have been done, but I wanted the turnout control isolated from the layout as Adriatic mentioned. I could have used the Tortoise's internal contacts to do it, but this was much less of a hassle to implement, plus I'm also triggering a block signal with the Azatrax board. An added bonus is it encourages operators to slow the heck down running through the staging room.
We're also looking at getting away from insulated rail triggering as the gaps sometimes present ground contact issues with some Proto 3/2 engines and a partial weakening of the TMCC signal. We've been looking at using a combination of optical and current-sensing train detection. This will also cover situations where members run scale-wheeled rolling stock (I'm not the only one) which will drop out the insulated rail occupancy detection prematurely once the locomotive clears the block.
Originally Posted by Al Galli:
Matt What is the advantage of using the infrared over simply using an isolated rail section much the way Lionel has always done with the switches? Seems like less work and much less expense.
Al
Originally Posted by Adriatic:
Originally Posted by Al Galli:
Matt What is the advantage of using the infrared over simply using an isolated rail section much the way Lionel has always done with the switches? Seems like less work and much less expense.
Al
It can be done totally isolated from track power, and each isolated rail takes away from the available connections(wheels). Though reliable, combined with traction tires, iffy situations could occur. While I prefer the pw methods myself, I understand fully why someone might chose this method.. Opto triggered, isolated switching circuits have long term reliability, small packages, and a relatively low cost.