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'Bachmann' Controller ... Thought It Was Faulty & Got Rid Of It
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 Posted: Thu Mar 14th, 2019 07:43 am
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Murray McPhie
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 Nope.

The engine is my dear little Forney.


It goes very well backwards and forwards, is greatly loved,

and is always put away in it's box after a run.




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 Posted: Thu Mar 14th, 2019 08:41 pm
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Michael M
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 Okay.

Is the loco DC or DCC?   If DCC could it be a decoder problem?

Or, is it possible something is jamming the gears when in reverse?



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 Posted: Fri Mar 15th, 2019 09:18 am
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Murray McPhie
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 Nope

The little Forney goes backward and forwards.
Always has.

I think it may have to do with supplying the correct voltage, AC,
and the correct amperage, or something.

When I tried to use one on my old N scale DC layout, I had the same result.

It doesn't matter, If I cant figure it out, the thing can go in the bin.




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Murray.

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 Posted: Fri Mar 15th, 2019 11:57 am
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Michael M
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 What voltage is the wall wart suppose to get?





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 Posted: Fri Mar 15th, 2019 03:02 pm
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Si.
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 " It doesn't matter, If I cant figure it out, the thing can go in the bin "  :f:



Hi Murray  :wave:


Freerails is reputed to have some of Model Railroadings top brains as Members !  :brill:

If we can't figure out what's wrong with a Bachmann train set controller ...

... we may as well call it a day & stick our fingers in the wall socket !  ;)  :shocked:



This problen is NUTZ :Crazy: Murray !



So you 100% HAVE GOT a  '16 Volt A.C. output'  wall-wart, right ?  ???


:doh:  :dt:



Si.




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 Posted: Fri Mar 15th, 2019 05:35 pm
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W C Greene
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 My advice (don't shoot me) is to chunk the little power pack and get a real one.
Bachmann sells a nicer one or maybe you can find a nice MRC power pack.
I look aside at anything that needs a separate wall plug in to make it work.
This thing might be OK for lights but running a locomotive?

Woodie




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 Posted: Fri Mar 15th, 2019 07:38 pm
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Michael M
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 I wouldn't chuck the thing. 
Could probably use it to power interior lights or switch machines or something.   
I'd take it if you weren't on the other side of the world.

Still bit of a mystery though. 
Maybe someone with an electrical background could chime in.




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 Posted: Fri Mar 15th, 2019 11:09 pm
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2foot6
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 I have been thinking again (now I have a headache)
It many be possible that the 0.7 of an Amp output of the controller,
is not enough to operate the loco in reverse.
 
As the loco maybe tight in the mechanism,
but it runs more freely in forward,
as I think it has not had much use.

That is the only reason I can think of,
as the problem has occurred with two Bachmann controllers,
and the loco works OK with other controllers.

That's my theory and I'm sticking to it.

:old dude: L:




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 Posted: Sat Mar 16th, 2019 02:53 pm
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Helmut
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 @2foot6
that thing needs power off a 16V AC wallwart/transformer. Operation seems to depend on having two ( positive and negative ) half-waves. A nowadays standard wallwart delivers filtered DC, so that may be the explanation.



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 Posted: Sat Mar 16th, 2019 03:49 pm
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Si.
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 " ... needs power off a 16V AC wallwart/transformer.
Operation seems to depend on having two ( positive and negative ) half-waves.
A nowadays standard wallwart delivers filtered DC, so that may be the explanation "



Hi Helmut  :wave:


That was EXACTLY what I was trying to say on the last Page <<< previously.  :old dude:

I don't think Murray confirmed if he was using an A.C. (correct) or D.C. (incorrect) wall-wart ?  ???



If he binned the original U.S. Voltage wall-wart ...

... & then picked up an Aussie one, having D.C. output ...

... YES ! ... That sounded like the problem to me.  :P

Especially since TWO Bachmann controllers BOTH did the 'funny' business ...  :f: :f:

... & were very possibly tested, using the same ( D.C. ? ) wall-wart.  L:


The oDd reversing-switch operation, is the give away here, I think.  :brill:



So come on Murray ... Spill the beans ! ... Show us your wall-wart !!  :shocked:



:old dude:



Si.



And yeah ... It ISN'T a straightforward resistance controller, like my swingin' '60s one.  [whack]



It probably has at least 1 rectifier & 1 transistor inside ...

... as well as the throttle (potentiometer) & forwards/backwards (D.P.D.T. Double Pole Double Throw) switch.



I actually unscrewed my Mates one, about 3 Christmases ago, cos I am a curious *$%&@£ ...  ;)

... but can't for the life of me remember what the hell was inside ?  :us:



I looked for AGES on The Net for a photo of the 'guts' of one ...

... & surprisingly couldn't find one anywhere.  :us:


:dt:




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http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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