DCC Developments & Experimentation

The place for general discussions and requests for help on all matters relating to T gauge.
davidmatthewson
Posts: 26
Joined: Mon May 02, 2016 7:50 pm

Re: DCC Developments & Experimentation

Post by davidmatthewson »

These are images of the 21M chassis before I murder it by trying to put a DCC decoder in it.. In a week or so we should be able to compare & contrast..
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2020-03-10 19_35_56-21m T chassis 014.JPG ‎- Photos.png
2020-03-10 19_35_56-21m T chassis 014.JPG ‎- Photos.png (502.73 KiB) Viewed 247 times
2020-03-10 19_35_29-21m T chassis 021.JPG ‎- Photos.png
2020-03-10 19_35_29-21m T chassis 021.JPG ‎- Photos.png (571.45 KiB) Viewed 247 times
2020-03-10 19_35_17-21m T chassis 020.JPG ‎- Photos.png
2020-03-10 19_35_17-21m T chassis 020.JPG ‎- Photos.png (725.68 KiB) Viewed 247 times
2020-03-10 19_34_56-21m T chassis 018.JPG ‎- Photos.png
2020-03-10 19_34_56-21m T chassis 018.JPG ‎- Photos.png (548.56 KiB) Viewed 247 times
2020-03-10 19_34_41-21m T chassis 017.JPG ‎- Photos.png
2020-03-10 19_34_41-21m T chassis 017.JPG ‎- Photos.png (558.72 KiB) Viewed 247 times

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dkightley
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Joined: Wed Nov 13, 2013 9:43 pm
Location: Nottingham, UK

Re: DCC Developments & Experimentation

Post by dkightley »

It can most definitely be done. One of the Class 150 DMU chassis for Saltash:
P1020111_red.JPG
P1020111_red.JPG (61.99 KiB) Viewed 245 times
P1020110_red.JPG
P1020110_red.JPG (57.19 KiB) Viewed 245 times
And here's how.....
1) Remove the motor by levering up the gearbox top (after removing the bogie & springs). Gently lift the top up sufficient to be able to flip out the motor! Close the gearbox back down afterwards so you don't lose any of the gears, etc.
2) Remove the terminal block from the motor by gripping the block from either side with a pair of snips and gently squeeze!. The block will break off, leaving the two contacts connected to the end face of the motor.
3) Cut the contact strips short & tin.
4) With a very sharp blade, cut off the little body mount from immediately behind where the motor sits, together with an angle of the plastic at the back of the motor mount to allow room for the dcoder to sit at an angle....you can see where it sits in the bottom photo.
5) Shorten the decoder wires and solder the motor wires to the motor.
6) Refit the motor and position the decoder in place.
7) Finally solder the power leads to the busbars.

I did have a heart-stopping moment writing this...it looks as if the grey & orange wires connect to the busbars...which is wrong!. Having looked closely I spotted that its the red and black that go to the busbars - the grey & orange do a U-turn and go to the motor.

And if it looks as if the busbars have been cut....they were like that when I opened it up. It looks as if busbars off a longer chassis were cut and soldered together with an overlap so they would fit on a shorter unit. Very strange!
Doug Kightley
Webmaster here and volunteer at the National Tramway Museum http://www.tramway.co.uk

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dkightley
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Location: Nottingham, UK

Re: DCC Developments & Experimentation

Post by dkightley »

Having spotted a few subtle differences in the mouldings, I've just realised that my chassis is a 20m chassis....as opposed to yours being a 21m chassis. So you have more room! About 0.05mm more by the looks of it! ;)
Doug Kightley
Webmaster here and volunteer at the National Tramway Museum http://www.tramway.co.uk

davidmatthewson
Posts: 26
Joined: Mon May 02, 2016 7:50 pm

Re: DCC Developments & Experimentation

Post by davidmatthewson »

Be afraid, very afraid....Thanks Doug.

rail450
Posts: 102
Joined: Thu Oct 27, 2016 7:05 pm

Re: DCC Developments & Experimentation

Post by rail450 »

Hi Doug,

I have ordered the DCX65 without cables. please describe the wiring of the coloured cables , their functions and show the complete schematics.

Thanks.

Siegfried

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dkightley
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Location: Nottingham, UK

Re: DCC Developments & Experimentation

Post by dkightley »

This gives you all the information:
http://www.tran.at/Dokumentation/DCX65.pdf

And if anyone wants an English translation, PM me...
Doug Kightley
Webmaster here and volunteer at the National Tramway Museum http://www.tramway.co.uk

rail450
Posts: 102
Joined: Thu Oct 27, 2016 7:05 pm

Re: DCC Developments & Experimentation

Post by rail450 »

Hi Doug,

I need DCX65 fotos showing the used colors to solder my cables in same order as yours

BR,

Siegfried

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dkightley
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Location: Nottingham, UK

Re: DCC Developments & Experimentation

Post by dkightley »

Wires connected as indicated:
Capture.JPG
Capture.JPG (57.35 KiB) Viewed 172 times
Doug Kightley
Webmaster here and volunteer at the National Tramway Museum http://www.tramway.co.uk

spturner
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Joined: Thu Mar 19, 2020 2:00 am

Re: DCC Developments & Experimentation

Post by spturner »

I just recently converted my GNER to DCC and to my surprise and amazement, it works! One thing that doesn't seem to work is the lights. Has anyone successfully wired the lights on one of these units? I tried soldering directly to the lightboard but that didn't do the job. I'd appreciate any guidance anyone might have on this.

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dkightley
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Location: Nottingham, UK

Re: DCC Developments & Experimentation

Post by dkightley »

How did you install the decoder chip into the unit? I'd love to compare notes so we can put together the definitive way of doing the install.

Regarding your question on the lights, I think the wiring depends on which version of the decoder you have. The image I posted above actually shows how the wiring to the lights differs.

I'd also like to find out more about how you're running DCC, etc. You're the only other forum member I know of who's actually fitted DCC....
Doug Kightley
Webmaster here and volunteer at the National Tramway Museum http://www.tramway.co.uk

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