No power to engine on DCC Hornby TT [RM controlled]

[Chrissaf]

Hi,

 

Which method of DCC conversion did you use?

 

Ray

[St1ngr4y]

Hello again,

 

To get the turntable to stop in the correct place when you use the TT icon, there are two entries in the Railmaster.INI file which need to be tweaked.

In case you aren't used to editing this file, here's how...

/media/tinymce_upload/1eb671ed9e0aa20a5518634b327985b8.png

 

As you will see there are two important settings for the turntable - speed and timer. The speed is that at which you want the motor to run, so a bit of experimentation of values is necessary until you find a speed which suits you sir. Once you have chosen this speed, you need to time (in seconds) how long it takes to move from one track to the next. A stop watch is handy if you have one. What I do is set the turntable going at the chosen speen, then I start the watch when the bridge arrives at one track, then I stop the watch when it arrives at the next track. Then that number of seconds is used for the "timer" setting in the INI file.

A word of warning here. If you want to rotate the TT, say, 3 tracks clockwise, click the right hand half of the TT icon as quickly as you can. The reason for this is that there is a fault in RM whereby it restarts the timer for the first track movement every time the icon is clicked. So if, for example you click it 3 times but at, say, intervals of 6 seconds, then 12 seconds will be added to the running time for the first track movement. This "feature" has been reported to HRMS quite a while back, but it still exists in the latest version of the software.

 

Hope this helps.

 

Ray

[Chrissaf]

Dcc conversion largely works but there is no dcc power to the track on the turntable though the dcc power is present in the approach track.

Often the turntable does not stop at the start position when this is requested using the turntable icon not set up as a 'loco'

 

Please advise

Chuff Chuff

[Chrissaf]

Regardless of which method you have used to modify the TT for DCC working. Have you disconnected the bridge supply wires underneath the TT and connnected them to the DCC power track feed. See the note to the right of this drawing at the 3 pm position.

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/media/tinymce_upload/58bf57fcc26ebda994c9ceb36b80bc0b.jpg

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[murray_robin]

Am usingaccessory decoder to turntable control in Railmaster

[Chrissaf]

You use a 'Loco Decoder' such as the R8249 for the most efficient control of the Hornby TT motor. That is what RM & the Hornby TT motor is optimised for. The motor in the TT is one that has also been used in early Hornby loco models.The R8247 Accessory Decoder is either a 'pulse' for solenoid points, or 'always on' for lamp based signals. You really need a decoder where the output can be reversed, or switched off (no voltage output), and has a speed control. These things are all features supported by a basic loco decoder such as the R8249.

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This of course assumes you are using the R8247 Accessory Decoder (you haven't been definitive about that in your reply).