Walthers HO 110' Turntable With DCC - NCE PowerCab Controller

[tstage]

Hi Darcy,

Along with Mike's suggestion, what locomotive(s) is this happening with - i.e. make & model?

Also, can you use your Power Cab to read the value for CV29?  To do that, you'll need to do the following:

• Press PROG/ESC 4x then press ENTER
• Press "2" (for CV)
• Enter "29" then press ENTER
• Read the value for CV29
• Press PROG/ESC or EMERGENCY/STOP to escape

A locomotive that takes off at full speed in DCC can sometimes indicate that the decoder is operating in dual-mode.  If we can determine the decoder and current value for CV29, we can tell you what value to enter into CV29 so that it only operates in DCC-only mode.

Tom

[Water Level Route]

Hello and welcome to the forum!

I have the exact turntable you are talking about and have not had any problem like you are describing.  It sounds to me like the DC power you are providing for the turntable control has also been wired to the bridge rails.  

Here is a picture of the bottom side of mine.  Note the orientation of the plugs.

Turntable power by Michael, on Flickr

On the green plug, the two wires on the left (white & red) are connected to the DC power supply.  The two red wires on the right connect to your DCC track bus.  Let's start there and verify that is how you have it wired up.  

Be patient as your first few posts are moderated.  Stick with it.  We'll figure it out.

[darcyremlinger]

I recently purhcased the Walthers 110' turntable (933-2851 - built-up kit) which includes the Walthers Turntable Control Box (933-2320). I have wired it accordingly and the turntable operates flawlessly as far as bridge operations are concerned; however, placing a DCC locomotive on the bridge results in the locomotive powering up (sound, lights) and instantly runs full speed, either backward or forward, depending on how it's placed it on the bridge. 

I am uncertain of: 

• What do I need to do on the NCE PowerCab (if anything)?
• Do I require the Advanced Control Module (ACM) from Walthers (product number 933-2321)?
• The set indicates "Turntable with DCC", ergo I presume it SHOULD be plug and play

Any feedback is greatly appreciated!