Bulleidboy Posted September 24, 2012 Share Posted September 24, 2012 A colleague has built a dog bone layout, with sidings going from both sides at one end, which connect up - effectively giving him a triangle at one end with a curved base (the end of the dog bone) - which I think gives him a reverse loop situation. He is using insul frog points with no DCC link wires and his power to the layout is connected at the curved base of the triangle - he has also used IRJ's on both points leading from the main circuit to the sidings. He gets a short circuit when one of the points is thrown - any ideas?? Link to comment Share on other sites More sharing options...
poliss Posted September 24, 2012 Share Posted September 24, 2012 As soon as the point is thrown a reverse loop is created. Either get rid of the reverse loop or add a reverse loop module. Link to comment Share on other sites More sharing options...
Bulleidboy Posted September 24, 2012 Author Share Posted September 24, 2012 He's already fitted the reverse loop module. Link to comment Share on other sites More sharing options...
poliss Posted September 24, 2012 Share Posted September 24, 2012 See the reverse loop section on Brian Lamberts website. http://www.brian-lambert.co.uk/DCC.htm#Reversing Loops. Link to comment Share on other sites More sharing options...
Bulleidboy Posted September 24, 2012 Author Share Posted September 24, 2012 Hi Poliss He has the book, but I'm wondering if he has the reverse loop correctly set up. I'll go and have another look at his layout. Thanks for your input. Link to comment Share on other sites More sharing options...
Flashbang Posted September 24, 2012 Share Posted September 24, 2012 Hi For a Triangle on DCC you need the RLM wired as per this example.. http://i190.photobucket.com/albums/z311/Flash_bang/DCCTrianglewiring_zps6e99c7f3.jpg Note: you may have to work the drawing around to suit your layouts track plan but the principal is the same. Check that the four Insulated Rail Joiners (IRJs) are fitted correctly too. Link to comment Share on other sites More sharing options...
Flashbang Posted September 24, 2012 Share Posted September 24, 2012 Sorry, posted before I was ready! The two IRJs on the lower straight section are 'best practice' and if Insulated frog points are used could be omitted, but I would add them anyway together with the additional feeds. The main four IRJs are the ones on the end of the Y where the Y tracks converge and then the point and track after these IRJs are fed from the RLM output onwards to the final exit pair of IRJs (Not shown in the drawing) which are fitted at least the longest trains lengths after the four Y ones. Link to comment Share on other sites More sharing options...
Bulleidboy Posted September 24, 2012 Author Share Posted September 24, 2012 Hi Flashbang Could you try the link again - I got to photobucket albums, and that was it. Many thanks Link to comment Share on other sites More sharing options...
poliss Posted September 24, 2012 Share Posted September 24, 2012 Link works for me. Link to comment Share on other sites More sharing options...
Fishmanoz Posted September 25, 2012 Share Posted September 25, 2012 Doesn't work for me either. Link to comment Share on other sites More sharing options...
Flashbang Posted September 25, 2012 Share Posted September 25, 2012 Here you go..... http://i190.photobucket.com/albums/z311/Flash_bang/DCCTrianglewiring.jpg Link to comment Share on other sites More sharing options...
Bulleidboy Posted September 25, 2012 Author Share Posted September 25, 2012 That's better - many thanks. Link to comment Share on other sites More sharing options...
Bulleidboy Posted September 26, 2012 Author Share Posted September 26, 2012 Hi Flashbang My colleague followed your link (I printed it off), and everything is now working as it should. Many thanks Link to comment Share on other sites More sharing options...
Flashbang Posted September 26, 2012 Share Posted September 26, 2012 Hi Glad he has it resolved and pleased I could help. :-) Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.