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I'm thinking about a 3D printing...
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 Posted: Wed Jun 22nd, 2016 05:37 pm
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pipopak
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So how many boxcar door do you need? If you had a correct door on another boxcar, you scan that door, save the that part of the image and then can print your new door for the other boxcar. I'm not sure what filament this machine uses but it probably would go close to giving you an "acceptable" door.

Probably I would go the latex mold and resin way, less work, cheaper and better finished product.
But I know I'm a relic from the past.
Jose.



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 Posted: Thu Jun 23rd, 2016 02:08 am
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jtrain
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Woodie, all I can say is WOW on that train car.  I guess I should have clarified in my example that I was talking about pieces that don't have enough demand to be built by manufacturers.  For instance, a custom bridge is a one time deal, I'd be the only person who needs that exact bridge or tunnel portals (how cool would it be to have custom tunnel portals!), or train cars and locomotive parts.  I've seen some examples of equipment in HOn3 where 3D printing is able to do it better than most people.  (Think C&S bear trap smoke arrester)  I guess it's all a "right tool for the job" situation where 3D printing fills the gaps many of us modelers are missing when trying to do a bang up job of a model or have something unique.

As for Jose, there is something to be said for going more traditional routes of modeling. 

Any other thoughts?

--James

Last edited on Thu Jun 23rd, 2016 02:13 am by jtrain



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See progress on the Crown Peak Logging Railroad

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 Posted: Thu Jun 23rd, 2016 10:22 am
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Bob D
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I've done the latex mold and liquid resin thing in a larger scale (1/6 tank parts).  There's a learning curve, time, and money involved in that process too, in order to get proficient enough to make decent parts.  I don't see 3D printing any differently, it's just another leaf on the modeling tree.

Here's an O-scale Dalman truck (Keil Line), not a lot of detail:

 

Here's what they should look like:







There's a guy in Australia that was working on these, but haven't heard of any progress lately.  I even found drawings for them from the N&W Historical Society.

I would really like to make these for this oddball car Seaboard Air Line owned:





I kitbashed this from this Atlas O boxcar:



I would love to have a detailed pair (or more) of these Dalman trucks.

Problem is, until I learn how, I don't see how you feed a 2 dimensional drawing into a 3D printer.  That's the thing that has kept me from going forward with 3D printing.

BobD.



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 Posted: Fri Jun 24th, 2016 04:24 am
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jtrain
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Bob, those trucks don't look too bad.

I think what you would have to do is use AutoCAD to turn those 2D drawings into a 3D computer model.  I also don't know how, but I'm learning on the 08 version of AutoCAD and will eventually get it.  Otherwise there are youtube tutorials.  I'm not going to lie, it's complicated (and I'm a millennial).  Anyone who masters AutoCAD for models would have the whole market to themselves.

The springs I don't think could be effectively modeled without additional support, but what you could do is design the truck like the prototype, where the beam is loose from the truck.  Then you could add metal springs and have yourself a sprung truck.

--James:thumb:



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James W.

See progress on the Crown Peak Logging Railroad

http://apartmentrailroad.blogspot.com

And:

http://rapidcityrr.blogspot.com

A blog with modeling ideas and prototype information about my favorite regional railroad, the Rapid City Pie
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 Posted: Fri Jun 24th, 2016 05:26 pm
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Alwin
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Bob, James,

Turning a 2D drawing into 3D is easy if everything has the same height. Then you could make the contours of the object and simply extrude it. But the truck frames have some profile on it, and the journal boxes. You have to model them seperatly and at last join everything together.

The problem with 3D is not only the object itself but also moving and/or rotating them in the right direction. That takes some practicing and maybe some more CAD knowledge.

For the 3D printing. I wouldn't buy a 3D printer myself but gave the job to a commercial company for better results. And you can order a lot for the price of a printer.

Alwin

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 Posted: Sun Jun 26th, 2016 07:40 pm
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jtrain
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I'm not going to start with a freight car or trucks or something that complicated... but maybe someday.  However, I'm learning on AutoCAD for buildings, structures, etc...  My first project is a depot and I just finished the floorplan:



It's a pretty generic depot, but I'm basing my dimensions on the floor plan of a Norfolk and Southern Depot.  I have no photos, but I can see where the windows and doors are placed. So it will have a hipped roof and a dormer over the bay window.  The next step is to add a layer for the roof lines and then to convert to 3D.  After that will be doors, windows and the chimney.  Then I'll have to figure out texturing for the wood.  Thankfully I won't need to draw grain in the wood since the 4+ layers of paint on these depots made the boards quite smooth.  Roof will be another problem though...

--James



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James W.

See progress on the Crown Peak Logging Railroad

http://apartmentrailroad.blogspot.com

And:

http://rapidcityrr.blogspot.com

A blog with modeling ideas and prototype information about my favorite regional railroad, the Rapid City Pie
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 Posted: Fri Jul 1st, 2016 11:30 pm
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tebee
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Here is a little example of a 3d printed Gn15 wagon from Shapeways compared to a simplified version printed on a home printer




Tom

Last edited on Fri Jul 1st, 2016 11:31 pm by tebee



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 Posted: Sat Jul 2nd, 2016 02:57 am
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Tramcar Trev
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There is definatley a lot to learn if you want stunning results in 3D printing. There are some who are trully brilliant at it.
This cable car would have to be printed in sections and assembled but hey you could have a whole fleet of them while you waited for the glue to dry on your first car.... Then there is the copy of my 4 wheeler likewise printed in sections in ABS and glued together....

Attachment: cable_car_1.jpg (Downloaded 21 times)



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 Posted: Sat Jul 2nd, 2016 03:01 am
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Tramcar Trev
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my original car....

Attachment: tramSydney_7.jpg (Downloaded 21 times)



____________________
There once was a man who said Damn!!
I perceive with regret that I am
A creature that moves
in predestinate groves
I'm not a Bus, I'm a tram
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 Posted: Sat Jul 2nd, 2016 03:02 am
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Tramcar Trev
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the 3D copy running on 3D track....

Attachment: tramSydney_1.jpg (Downloaded 21 times)



____________________
There once was a man who said Damn!!
I perceive with regret that I am
A creature that moves
in predestinate groves
I'm not a Bus, I'm a tram
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