erratic running, from a couple of locos

[Dan Griffin]

i have a couple of locos that seem to have developed problems,

 

first up, brand new Hornby 153, fitted with a standard Bachmann 8 pin chip. runs fin at speed, but very jerky slow speed and crawling makes it lurch aroun like a bucking bronco. i had this problem before with a different loco, do i need a better chip to fit in it?

 

secondly, a hard wired lima class 37, fitted with a tcs t1 decoder, ran fine last time i ran it, now moves off, stops, then goes again, jerky. wheels are clean and all wiring seems to still be ok.

 

any help would be great.

 

thanks in advance

[smokebox]

This is quite a common occurence with the Bachmann 3 function decoders. It can usually be cured by adjusting CVs 54 and 55. A bit of experimenting will be needed to get the best results. Change in steps of 5 or 10 for a start and then refine further as needed

[k9-70]

i have a couple of locos that seem to have developed problems,

 

first up, brand new Hornby 153, fitted with a standard Bachmann 8 pin chip. runs fin at speed, but very jerky slow speed and crawling makes it lurch aroun like a bucking bronco. i had this problem before with a different loco, do i need a better chip to fit in it?

 

secondly, a hard wired lima class 37, fitted with a tcs t1 decoder, ran fine last time i ran it, now moves off, stops, then goes again, jerky. wheels are clean and all wiring seems to still be ok.

 

any help would be great.

 

thanks in advance

 

Had a similar problem with the Hornby Class 153 Dmu,

I entered the CV values 10 into CV54 & 50 into CV55.

I don't know what them settings do, but it sure tamed the Beast.

Now it's running smoothly with a good turn of top speed.

 

K9-70

[Dan Griffin]

ok thanks, so how do i change cv's using a dynamis? havnt a clue!

[smokebox]

ok thanks, so how do i change cv's using a dynamis? havnt a clue!

Page 16 of the Dynamis manual