Photega Posted December 14, 2014 Share Posted December 14, 2014 Has any body tried installing a decoder into a Lima Class 50, this is the one where there is just one black wire running to the trailing bogie. Link to comment Share on other sites More sharing options...
Fishmanoz Posted December 14, 2014 Share Posted December 14, 2014 Don't know the loco but assume the trailing bogie has pickups both sides? If so, the other side pickups must return via chassis. Given this, you will need to make sure the motor is isolated and isn't connected to chassis before connecting the orange and grey wires to it or you'll blow the decoder. Link to comment Share on other sites More sharing options...
Photega Posted December 14, 2014 Author Share Posted December 14, 2014 Unfortunately it doesn't, it has just one pickup, using a multimeter it appears the other side picks up on the motor bogie. Link to comment Share on other sites More sharing options...
2e0dtoeric Posted December 14, 2014 Share Posted December 14, 2014 That makes it tricky! The chassis is part of the electrical circuit.What you need to do is find some way of completely isolating the motor from the chassis, then connect the chassis and bogey wire to the chip, and the chip outputs to the motor brushes.The chip then has to be insulated, so it cannot possibly touch the chassis anywhere.Get it wrong, and the smoke gets out, the chip won't work, the local model shop owner gets a few more bob in profit, and your wallet gets another hole in it!Check and check again with the instructions, that you are connecting the proper wires in the correct places.There are several explanations on here, in different places, on how to DCCify a Ringfield motor. This is much the same problem. Link to comment Share on other sites More sharing options...
poliss Posted December 14, 2014 Share Posted December 14, 2014 There was a guide here http://www.rmweb.co.uk/dcc/Lima.htm but the photos seem to have gone. The instructions may help.There are photos and instructions on converting a Lima Class 52 here. http://www.tcsdcc.com/Customer_Content/Installation_Pictures/HO_Scale/Lima/Class_52/Lima_Class_52.htm Link to comment Share on other sites More sharing options...
Fishmanoz Posted December 14, 2014 Share Posted December 14, 2014 Unfortunately it doesn't, it has just one pickup, using a multimeter it appears the other side picks up on the motor bogie. As the posts above tell you, the whole chassis and uninsulated wheels on both bogies form the other half of the circuit. the wheels with the pickups will have insulated bushes on them to isolate from the axles and chassis. Then you are going to find the left motor brush connection is also connected to chassis. You need to replace the metal screw holding the left brush with a nylon one to insulate it from the chassis. One source will be Norfolk Coast Models who can also give you advice. Link to comment Share on other sites More sharing options...
Photega Posted December 15, 2014 Author Share Posted December 15, 2014 Thanks for the advice, the link to the 52 conversion looks very similar so will give it a go later. :) Link to comment Share on other sites More sharing options...
Fishmanoz Posted December 16, 2014 Share Posted December 16, 2014 Admin, this thread seems to have got itself out of last post order. But then I will have fixed it now. As as you can see, the post above is a day old but it was sitting above some only hours old, so you have a subtle bug somewhere? Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.