Alanburford9101 Posted March 14 Share Posted March 14 Hi ałl I bought a used Duke of Gloucester' Class 8 Late British Rail Skala 00 Hornby Hobbies from a seller who assured me it runs well. However, when I try to run it on my track, it's completely dead. But on my test track I can read and set all the CVs. Any ideas how I can test the motor etc? Alan Link to comment Share on other sites More sharing options...
Brew Man Posted March 14 Share Posted March 14 This is where a decoder tester comes into its own. ESU do one for around £40 and they are indispensable once you have one. LaisDCC do one slightly cheaper but not significantly so. It is said that the latter is a rip off of the former, so by getting the ESU you'd be sure of having the genuine article. Link to comment Share on other sites More sharing options...
LTSR_NSE Posted March 14 Share Posted March 14 Easiest way to test motor, running etc. is to pop the body off, swap the decoder for a blanking plate & run it on DC. Link to comment Share on other sites More sharing options...
ntpntpntp Posted March 14 Share Posted March 14 If you can read the CVs ok that implies the decoder is alive and the output FETs are not blown. Simple question but have you read the existing address (& check if it is long or short address)? Have you tried resetting the decoder (should return to short address 3)? To test the mechanicals I agree with replacing the decoder with a DC blanking plate and run on DC. Link to comment Share on other sites More sharing options...
Alanburford9101 Posted March 14 Author Share Posted March 14 Hi The loco does move (jolts);on the programming track when setting CVs 3 and 4. I can't set the sound functions either. Alan Link to comment Share on other sites More sharing options...
ntpntpntp Posted March 14 Share Posted March 14 Did the previous owner reset the address for you? (I have another post awaiting approval for some reason) Link to comment Share on other sites More sharing options...
Alanburford9101 Posted March 14 Author Share Posted March 14 33 minutes ago, ntpntpntp said: If you can read the CVs ok that implies the decoder is alive and the output FETs are not blown. Simple question but have you read the existing address (& check if it is long or short address)? Have you tried resetting the decoder (should return to short address 3)? To test the mechanicals I agree with replacing the decoder with a DC blanking plate and run on DC. I will check with the previous owner but I did set the short address to 3 but no joy. Link to comment Share on other sites More sharing options...
ntpntpntp Posted March 14 Share Posted March 14 1 hour ago, Alanburford9101 said: I will check with the previous owner but I did set the short address to 3 but no joy. ... and you can read it back as address 3? You also checked the CV29 bit #5 is set to short address mode too? Link to comment Share on other sites More sharing options...
Alanburford9101 Posted March 14 Author Share Posted March 14 No I haven't checked that but the previous owner says the long address is 1000. How do I set this? Link to comment Share on other sites More sharing options...
ntpntpntp Posted March 14 Share Posted March 14 What DCC system do you have? Can it drive locos using 4 digit long addresses? What are the current values of CV17, CV18 and CV29? If you can read these then use the online tools below to check the current decoder settings. This page has a tool which can encode or decode CV 29 Enter the value you have for CV 29 and use the "back calc" button to see which flags are set. The same page also has a tool can also encode or decode CV 17 & 18. DCC CV29 Calculator (2mm.org.uk) Link to comment Share on other sites More sharing options...
Fishmanoz Posted March 15 Share Posted March 15 Try setting the address on your controller to 1000 and see what happens. Link to comment Share on other sites More sharing options...
ColinB Posted March 15 Share Posted March 15 Before you do any of this check the 4 pin connector between loco and tender, sometimes they are not fully home. That loco has tender pickups and the decoder is in the tender so it could be that the motor is just not connected. Generally if you can read the decoder parameters then it sounds like it is working properly. Link to comment Share on other sites More sharing options...
96RAF Posted March 15 Share Posted March 15 12 minutes ago, ColinB said: Before you do any of this check the 4 pin connector between loco and tender, sometimes they are not fully home. That loco has tender pickups and the decoder is in the tender so it could be that the motor is just not connected. Generally if you can read the decoder parameters then it sounds like it is working properly. TXS decoders need a load to generate an ACK unfortunately. Link to comment Share on other sites More sharing options...
ColinB Posted March 15 Share Posted March 15 37 minutes ago, 96RAF said: TXS decoders need a load to generate an ACK unfortunately. I did think that, but it is worth checking that connector just in case it is not that good a connection. If you can read a CV it means the decoder is working, generally if the motor drive dies so does the decoder. Perhaps it is just a mix up on the loco id. The Duke of Gloucester has a cheap 3 pole motor as fitted in a lot of the Railroad models, I upgraded mine to a 5 pole one. Unless of course the motor is stuck, on one of my 5 pole ones the magnetic poles clip fell out and jammed the motor. Link to comment Share on other sites More sharing options...
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