Bachmann 8750/57XX Pannier, smoother?

[Tom F]

Morning all

 

I’ve a Bachmann 8750 that is a little noisy and not the smoothest of runners. It begins moving brisker that I would like at speed step 1 out of 128.

 

What CVs should I be looking at to, one start it moving at a slower speed and two generally have it running smoother.

 

Cheers

Edited November 13, 2018 by 9793

[34theletterbetweenB&D]

I would have the decoder out of it and get it running smoothly and quietly on DC (no feedback or any other aids) as the first step. (There are poor decoder designs available, and you want to get the mechanical side sorted independent of any decoder. When the decoder is reinstalled it should at very least result in no worse performance than is available from DC.)

 

CV2 is set to whatever value is required for the slowest running the mechanism can maintain at speed step 1. If the decoder output at the minimum setting available on CV2 cannot produce slow enough movement, look for other adjustments the decoder has available. If these do not produce the required result consider an alternative decoder.

[Tom F]

Thanks 34C

 

It’s not the best of runners on DC (funny there is such variations between chassis). It’s fitted with a TCS decoder and interestingly which my panniers all have.

[34theletterbetweenB&D]

It's a simple mechanism, and they should all perform very similarly. My preference would be to get it mechanically acceptable before decoder fitting. Does it roll freely with the motor out, is current collection rock solid off all wheels, how does the motor run off the model?

 

(I had a problem child Bachmann Jinty 0-6-0 with rough and noisy running to look at some years ago - essentially identical drive train to the Pannier - and to my surprise it turned out to be a motor magnet slightly loose inside the can. That's a rarity, more usually it will be something affecting the mechanism drive train, like a out of position wiper running on the spokes, a wheelset slightly constrained, a gear tight or gummed up with dried grease, to name a few of the possibilities.)