Subject:
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Re: What kind of motor comes with the 4559?
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Newsgroups:
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lugnet.trains
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Date:
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Sat, 15 Jan 2000 11:20:47 GMT
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Viewed:
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858 times
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I have experienced this interesting phenomenon - luckily it occurs in a 1.5m
long tunnel about 7 track meters from the controller feed point so the slower
speed prevents of derailing in 'the dark hole' (sometimes!).
I recently tried several motors on the same stretch of track and noticed a
marked variation in the speed of individual units. They are all fairly new so
do they need 'running in'? In fact, I would prefer it if there is some
variance as this is a simple way to provide more realistic control to
differentiate between the express trains and slower freight engines. Using
local resistance on the motors themselves (such as additional lights or
parellel resistors) could work but it's not the right way to do it as this
would simply draw more current from the controller.
I'd be more interested in finding a way of slowing down the trains for finer
speed control - has anyone tried 'pulse' controllers from traditional model
railways? Most of these use a constant 12v which is 'pulsed' at very short
frequencies, the length of each 'on' pulse determines the amount of power
received by the motor. By using a constant 12v the problem of voltage drop
over long distances should also be eased. Does anyone have any ideas on using
this for LEGO(R)motoers bearing in mind the requirement for 9v (not all motors
are suitable for this type of control - you'll know when you hear a buzzing
noise accompanied by an acrid smell and a cute puff of smoke)?
Jon
In lugnet.trains, Ben Jackson writes:
> In lugnet.trains, Larry Pieniazek writes:
> >
> > However, note that there is a faction that feels more than one motor is more
> > likely to interfere with speed control. The GMLTC layout has only one power
> > connection to its main line loops and when a train is at the far end there is • a
> > noticable slow down due to path length adding extra resistance... This slow
> > down seems to be made worse by having two motors in the train instead of one.
>
> This is due to the relatively light gauge of metal used in the track rails.
> Over a long layout they have a significant resistance. If you are seeing
> slowdowns at the far end of the layout, just run some heavier wire (12ga or
> even 14ga house wire would be fine for this) parallel to the track and attach
> it with standard LEGO connectors as often as necessary to get consistent
> performance. The whole layout can still be powered fine from a single
> regulator.
>
> --Ben
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Message has 1 Reply:
 | | Re: What kind of motor comes with the 4559?
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| (...) Mine happens on the worst place...right at the steepest point of the railway...ah well... (...) No, but I use 2 MRC Tech 2 packs for power, because I find them nicer to use than the Lego ones. I had them before I had the lego trains. Don't use (...) (24 years ago, 15-Jan-00, to lugnet.trains)
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Message is in Reply To:
| | Re: What kind of motor comes with the 4559?
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| (...) a (...) This is due to the relatively light gauge of metal used in the track rails. Over a long layout they have a significant resistance. If you are seeing slowdowns at the far end of the layout, just run some heavier wire (12ga or even 14ga (...) (24 years ago, 14-Jan-00, to lugnet.trains)
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