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I am curious to know if anyone has attempted to use the technic motors
and gears to build their own train motor.
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In lugnet.trains, Wayne Jackson wrote:
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I am curious to know if anyone has attempted to use the technic motors
and gears to build their own train motor.
|
Brickshelf user “swoofty” built one
not too long ago.
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Matt Hamann wrote:
> In lugnet.trains, Wayne Jackson wrote:
> > I am curious to know if anyone has attempted to use the technic motors
> > and gears to build their own train motor.
>
> Brickshelf user "swoofty" built one
> <http://www.brickshelf.com/cgi-bin/gallery.cgi?f=301135 not too long ago.>
I saw that one during a random scrounge through Brickshelf, but I
thought it was a mock-up, but now I see it is a scratch built motor.
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In lugnet.trains, Wayne Jackson wrote:
| |
I am curious to know if anyone has attempted to use the technic motors
and gears to build their own train motor.
|
I did one too, to show at a BeLUG event last november, but never got around to
do decent pictures or post them here. The train isn’t as nice as Swoofty’s, but
the principle for driving the wheels appears to be the same:
Which is pretty straightforward. Doing a nice train around it is, to me, more
difficult, so I just redid it the 7740 way, which is my idea of a train.
What I did to get it funnier was stuff two medium PF motors in there, and couple
them with a differential so that I could get 4 different speeds in both
directions - as the current PF remote doesn’t do PWM. (And I didn’t know the
receiver could at the time)
Well, more pictures there if you’re interested; maybe I’ll do more about it
someday (it seems that moving requires a tremendous amount of non-LEGO time):
http://www.meltingbricks.net/pictures/galleries/power_function_7740/
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In lugnet.trains, Jean-Marc Nimal wrote:
> In lugnet.trains, Wayne Jackson wrote:
> > I am curious to know if anyone has attempted to use the technic motors
> > and gears to build their own train motor.
>
> I did one too, to show at a BeLUG event last november, but never got around
> to do decent pictures or post them here. The train isn't as nice as
> Swoofty's, but the principle for driving the wheels appears to be the same:
>
> <<http://www.meltingbricks.net/pictures/galleries/power_function_7740/slides/IMG_3597.JPG>>
>
> Which is pretty straightforward. Doing a nice train around it is, to me, more
> difficult, so I just redid it the 7740 way, which is my idea of a train.
>
> What I did to get it funnier was stuff two medium PF motors in there, and
> couple them with a differential so that I could get 4 different speeds in
> both directions - as the current PF remote doesn't do PWM. (And I didn't know
> the receiver could at the time)
>
> Well, more pictures there if you're interested; maybe I'll do more about it
> someday (it seems that moving requires a tremendous amount of non-LEGO time):
>
> <http://www.meltingbricks.net/pictures/galleries/power_function_7740/>
anyone care to chime in on how this setup does with pulling power?
ondrew
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In lugnet.trains, Ondrew Hartigan wrote:
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anyone care to chime in on how this setup does with pulling power?
ondrew
|
Well, bear in mind I’m no train expert myself - and that this setup was thrown
together a bit hastily; in particular, one gear train was too loose and would do
an horrible noise when tortured.
That said, I used it to pull a few of Ludo Soete’s Belgian railcars, which are
quite heavy, and it seemd to bear the load without trouble. It probably wouldn’t
take more than 10 regular cars, but I honestly don’t know.
Another issue is the friction on the rails - the standard bands provided with
the RC wheels aren’t too good. I tried some alternates in Brasschaat that
someone else had made, but it wasn’t better. Didier Enjary was kind enough since
then to point me to a standard LEGO rubber belt
(x71) which works like a charm, but I
didn’t try it in real conditions.
I’d happily do more tests, but that’ll have to wait as I’m busy for the moment.
I’ll probably take that model, or a better one, to Fana’Briques in Rosheim and
see what kind of speed I can get from such a setup.
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In lugnet.trains, Jean-Marc Nimal wrote:
| |
In lugnet.trains, Ondrew Hartigan wrote:
|
| |
Another issue is the friction on the rails - the standard bands provided with
the RC wheels aren’t too good. I tried some alternates in Brasschaat that
someone else had made, but it wasn’t better. Didier Enjary was kind enough
since then to point me to a standard LEGO rubber belt
(x71) which works like a charm, but I
didn’t try it in real conditions.
|
Hi,
On the subject, be sure to check Steve Barile’s RailBricks #2 article about the
PFS train. (page 6-7) - http://www.railbricks.com.
I’ve been able to point this at Jean-Marc but that’s (AFAIK) an original idea by
Steve.
Lot of friction on the rails can be a goal.
But some slip can also be a lot of fun - for instance when driving a steam
engine : to see the wheels and rods “alive” while the train is gaining speed
only slowly makes the whole experience more realistic. Yes, the real stuffs have
also some friction issue :-)
Didier
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In lugnet.trains, Jean-Marc Nimal wrote:
| |
In lugnet.trains, Ondrew Hartigan wrote:
| |
anyone care to chime in on how this setup does with pulling power?
ondrew
|
Well, bear in mind I’m no train expert myself - and that this setup was
thrown together a bit hastily; in particular, one gear train was too loose
and would do an horrible noise when tortured.
That said, I used it to pull a few of Ludo Soete’s Belgian railcars, which
are quite heavy, and it seemd to bear the load without trouble. It probably
wouldn’t take more than 10 regular cars, but I honestly don’t know.
Another issue is the friction on the rails - the standard bands provided with
the RC wheels aren’t too good. I tried some alternates in Brasschaat that
someone else had made, but it wasn’t better. Didier Enjary was kind enough
since then to point me to a standard LEGO rubber belt
(x71) which works like a charm, but I
didn’t try it in real conditions.
I’d happily do more tests, but that’ll have to wait as I’m busy for the
moment. I’ll probably take that model, or a better one, to Fana’Briques in
Rosheim and see what kind of speed I can get from such a setup.
|
What I’d like to know about this set-up is how it copes with going over points.
I’ve taken track power up into a mechanism through the pivot-point of a bogey,
but I haven’t powered a truck down through the pivot point like this.
I can see that that would put some torque on the bogey, causing it to favour
turning to one side. This could cause trouble going over points (switches)
since these operate primarily by guiding only one side of the wheelset.
Jason R
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Jean-Marc Nimal wrote:
> In lugnet.trains, Wayne Jackson wrote:
> > I am curious to know if anyone has attempted to use the technic motors
> > and gears to build their own train motor.
>
> I did one too, to show at a BeLUG event last november, but never got around to
> do decent pictures or post them here. The train isn't as nice as Swoofty's, but
> the principle for driving the wheels appears to be the same:
>
> <<http://www.meltingbricks.net/pictures/galleries/power_function_7740/slides/IMG_3597.JPG>>
>
> Which is pretty straightforward. Doing a nice train around it is, to me, more
> difficult, so I just redid it the 7740 way, which is my idea of a train.
That is exactly what I was/am looking at. Using the current line of PF
modules to power a train.
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In lugnet.trains, Wayne Jackson wrote:
> I am curious to know if anyone has attempted to use the technic motors
> and gears to build their own train motor.
I tried using pneumatics to make my train motor--
http://sandysparky.net/gallery/20061026_pneumatic_train_1
http://www.youtube.com/watch?v=Y1gQWdWjTmc
:)
Eh, it was a valiant effort!
Dave K
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David Koudys wrote:
> In lugnet.trains, Wayne Jackson wrote:
> > I am curious to know if anyone has attempted to use the technic motors
> > and gears to build their own train motor.
>
> I tried using pneumatics to make my train motor--
>
> http://sandysparky.net/gallery/20061026_pneumatic_train_1
>
> http://www.youtube.com/watch?v=Y1gQWdWjTmc
>
> :)
>
> Eh, it was a valiant effort!
>
> Dave K
That is pretty good. I noticed that someone pasted a comment on using
more cylinders. I was thinking perhaps emulating a bag-pipe might help
keep the air pressure up.
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In lugnet.trains, Wayne Jackson wrote:
> I am curious to know if anyone has attempted to use the technic motors
> and gears to build their own train motor.
See <http://www.tau.ac.il/~stoledo/lego/technic-train/>.
Sivan
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