How to wire non derailing DZ switch machines without interfering with the DCS signal

I doubt The DZs are causing your low dcs signal but you could run a separate power supply buss wire  to them using the aux posts of your (Z4000) transformer if you have one  or a completely different transformer phased with the one supplying track power. They would have to be phased together to get the non-derailing feature to work.

 Having said that.... lets go back to the beginning and start by doing a track signal test on one block on fixed 1 channel. It may mean disconnecting a few "hot" leads and adding them back one at  time testing as you add them back. Yep a bit of work.

 A  question ...   Do you have any spare channels left on the tiu that you could  take advantage of their signal generators? 

Yep know what you mean about the lash-ups.

You do not state the switch machine - DZ1000 or DZ2500.  Go to the Ross web site, technical info, and click on the item you desire to wire.  Complete instructions are there.  I run my Ross (with DZ1000's) off the 12V aux terminal on one of the Z4000's.  Derailing is in service and works fine.

As for signal strength - what size wire are you using for track power feed?  Should be a min. 16ga., 14 is better.

bruce

I power my switch DZ 2500 from the auxiliary power terminals of the Z4000.  Switch machines run best when connected to a steady power source in my experience.  Track power varies with the load even when running in command mode.

My machine work fine and I don't have issues with the non derail feature.  I wired the machines per the instructions that came with them for non derail action.

NH Joe

Wire the outside terminals of the motors to the controller and the insulated outside rail.  For the center terminal, run a feed from an accessory terminal all around the layout to feed the centrer terminals.  I have several dozen DX1000s and no signal problems.

Thanks for the tips and suggestions.

I pulled all the engines and cabooses off the track parked all freight trains as many as possible in sidings I could turn off power to, removed everything that has power pick ups etc.

Tried 1 engine all around and tested the turnouts while doing a signal test.

This time the engine was reading mostly 10 around most of the layout and a few 9's so looks good the turnouts when operated did not degrade the signal at all.

So now to start testing again and see what is making the signal drop??

Tried a 2nd engine it also got 10's most of the layout.

Put illuminated cars on track one-at-a time while monitoring signal.  One may have a constant voltage board that needs a choke.