Recent Topics      
YMR logo

You are here:  Your Model Railway Club > Getting You Started. > Electrics - DC > Not Another Short? To bottom of page
                 

 Moderated by: Spurno
Start New Topic Reply Printer Friendly

Not Another Short? - Electrics - DC - Getting You Started. - Your Model Railway Club
AuthorPost
 Posted: Thu Jun 10th, 2021 05:06 pm
PMQuoteReply
link to this 1st post
Gwiwer
The Mermaid Inspector


Joined: Sat Oct 25th, 2014
Location: Upon A Hill Of Strawberries, United Kingdom
Posts: 1160
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

I use Peco PL-10 and PL-11 point motors wired using their colour scheme throughout.  Black and red are the switch wires, green is the common power.  

Each motor has a green wire which are all fed back towards the controller.  Each switch on the panel has a green which is also fed back to the controller.  All the various greens on each side are brought down to two single wires through various choc-block terminals where two and sometimes three wires are reduced to one across the block.  

I connect the switch feed to the negative terminal and the power feed to the positive side as per the controller instructions.

And I get a short.  

Swap the wires.

I get a short.

WHY?????   :hmm   I had this all working but now it shorts.  Not enough hair left to tear out.  :brickwall



____________________
Rick
Layouts here and here
Back To Top PMQuoteReply

 Posted: Fri Jun 11th, 2021 05:43 am
PMQuoteReply
link to this 2nd post
Sol
A modelling Moderator.


Joined: Mon Nov 28th, 2011
Location: Evanston Gardens, South Aust, Australia
Posts: 4357
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

What controller? Do you mean the power supply?

Can you supply a drawing of the wiring ?



____________________
Ron
NCE DCC ; 00 scale UK outline.
Back To Top PMQuoteReply

 Posted: Fri Jun 11th, 2021 09:45 am
PMQuoteReply
link to this 3rd post
xdford
Member
 

Joined: Tue Aug 11th, 2009
Location: Melbourne, Australia
Posts: 3365
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Hi Rick,
Is it possible you have a burnt out coil in one of your switches?  Before connecting your power, check for the absence of resistance with multimeter. Personally I think you have a crossed wire or if you have a pair of wires from your supply to your switches, perhaps a faulty wire?

That will do for starters... it is late here in Victoria!

Good Luck

Trevor

Back To Top PMQuoteReply

 Posted: Fri Jun 11th, 2021 10:42 am
PMQuoteReply
link to this 4th post
Gwiwer
The Mermaid Inspector


Joined: Sat Oct 25th, 2014
Location: Upon A Hill Of Strawberries, United Kingdom
Posts: 1160
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Burnt-out coil?  I doubt it because everything was working correctly when tested on a previous controller.  That controller, which was the one I used on Penhayle Bay for over 10 years, was replaced because the CDU didn't work so a known problem.  The points were wired back to the accessory output.

The new one is a Morley Vortrak Zero-Ten with inbuilt CDU and therefore the updated version of their Zero-Nine which I was using before.  The points are wired to the CDU output.  

I'll have to start checking things with the multimeter over the next few days.  It might even be as simple as having an item of rolling stock placed across the tracks at a switch though I can't see how that would show a short in the point-motor circuit.  

The other option is that two wires are touching somewhere which should not be touching.  That could take a lot of tracking down ..... 

:hmm



____________________
Rick
Layouts here and here
Back To Top PMQuoteReply

 Posted: Fri Jun 11th, 2021 05:34 pm
PMQuoteReply
link to this 5th post
Petermac
Admin


Joined: Sat Oct 13th, 2007
Location: Nr Bergerac, France
Posts: 18577
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

If it was all working before you did your "step-down" into your single wires Rick, then the problem has got to be in that stepping down.

Have you used choc blocks or tag strips ?  My guess goes with Trevor - you've crossed a wire somewhere in the operation - easily done with multiple wires and repetitive jobs.

Stock on the track wouldn't cause a short - unless the axle insulation has gone belly up but you'd see that easily...........



____________________
'Petermac
Back To Top PMQuoteReply

This is topic ID = 16762     Current time is 03:09 pm  
You are here:  Your Model Railway Club > Getting You Started. > Electrics - DC > Not Another Short?
You can type a quick reply to this topic here. Click in the box below to begin.

Or to reply to an individual post, or to include images, attachments and formatted text,
click the Quote or Reply buttons on each post above.

To start a new topic in this forum, click the Start New Topic button below.
To start a new topic in a different forum, click the Forum Jump drop-down list below.
Start New Topic

Back to top of page

           
15 Most Recent Topic

Problems with this web site? Please contact the Webmaster.

All material submitted to this web site is the responsibility of the respective contributor. By submitting material to this web site you acknowledge that you accept full responsibility for the material submitted.
Unless stated otherwise, all the material displayed on this web site, including all text, photographs, drawings and other images, is copyright and the property of the respective contributor. Registered members are welcome to use it for their own personal non-commercial modelmaking purposes. It must not be reproduced or re-published elsewhere in any form, or used commercially, without first obtaining the owner's express permission.
The owner of this web site may edit, modify or remove any content at any time without giving notice or reason.    © 2008

                 

Recent Topics Back to top of page

Powered by UltraBB 1.15 Copyright © 2007-2011 by Jim Hale and Data 1 Systems. Page design copyright © 2008-2013 Martin Wynne. Photo gallery copyright © 2009 David Williams.