r/3dPrintingInModelRail

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▲ 2.6k r/3dPrintingInModelRail+365 crossposts

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u/GaryNOVA — 1 day ago
▲ 63 r/3dPrintingInModelRail+2 crossposts

3d printed base boards

Doing a bit of an experiment to see if I can 3d print a layout, the first 3 boards are now wired trains are running (btw ignore the missing buffer and coal on the j50, I brought it like that and im going to fix it one day)

u/AutomaticChapter162 — 2 days ago
▲ 344 r/3dPrintingInModelRail+2 crossposts

1916 IRT subway car. First full FDM test print

A little update on the 1916 IRT car I’ve been working on for the elevated railway project.

The model is mostly finished now and this is the first time I’ve been able to put the complete body on the elevated structure and station. Seeing it in place definitely helped me catch a few things I still want to tweak.

This test was printed with a 0.4 mm nozzle. I’m actually pretty happy with the rivet and window detail, but I think this model is right on the edge of what makes sense with a 0.4. I’m going to pick up a 0.2 mm nozzle and see if i can print the smaller details, particularly around the windows and front/rear panels.

I also modelled a basic interior since the windows are large enough that an empty shell looked a bit strange.
I’ve decided not to 3D print the running gear. I’ll use ready-made bogies and metal wheelsets instead. At this scale I’d rather have reliable running gear than force everything to be printed.
Still a few adjustments to make, but the car itself is getting pretty close.

u/EMBNumbers — 3 days ago
▲ 120 r/3dPrintingInModelRail+2 crossposts

Progress on my NTrack Module

This album is progress on my N-Track module. I hope to show the module at a Nov. train show.

  • 48"x30"
  • Lauan Plywood construction (everything cut from a single 4'x8' sheet. - Soft pine dimensional lumber is used for C-clamp placement and as a base for screwing/mounting the legs.
  • All structures, bridges, abutments, railings, fences, etc. are original 3D models printed on a Bambu A1 with PLA 0.4mm nozzle and 0.2mm layer heights. Apart from the Kato track and raw materials, there are no commercial kits or components.
  • Rocks are hand carved plaster over foam board insulation.
  • The three required community tracks run through the module below grade. The scenery including rocks and structures lifts out easily to access the community tracks.
  • The rocky side is the front. The module is setup to be an annex to my regular layout as well as a display unit. The rocks align with scenery on my main layout.
  • The track plan is inspired from David K. Smith's Jersey City Industrial
u/EMBNumbers — 3 days ago

Using a broken USB cable that I found on the street as a power source for the coach

I couldn't just leave E-waste lying in the street, and later I had the idea!

Since this version of the coach won't go into full production and remain a display piece for my friend, the USB cable is an ideal way of powering it. Add a switch to change sides of the tail lights, add an array of warm white LEDs, and voilá! Desk display piece with mood lighting!

I haven't yet professionally insulated the leads with heatshrink due to the remaining fixtures that are to be connected still, but I just had to test the idea for shits and giggles! I just find it so neat already!

Remember, kids, always check what sort of power is applied to the leads with a multimeter before reappropriating them! That's what I did! You never know whether a cheap cable is colour-coded correctly consequently!

u/lillywho — 3 days ago

What 3D modeling tools do you use, and what are the pros and cons?

I primarily use SketchUp Pro. It has all kinds of functionality and plugins that I'm barely aware of. I essentially use the subset of features that were present in the last free desktop version, SketchUp 2017. I also use Blender.

  • SketchUp:

    • Pros:
      • Easy to learn. You draw 2D shapes and then extrude them to form 3D geometry
    • Cons:
      • Not good for organic shapes like human figures. It's better for architecture
      • Ordinary usage generates many instances of internal geometry that makes models non-manifold. Non-manifold geometry confounds slicer software.
      • Recent versions of SketchUp do not always delete geometry that you deleted in the editor. Geometry becomes invisible and confounds slicer software even though there is nothing you can see or delete to correct the model. When this happens, you can no longer edit the model in SketchUp. You MUST move on to a different tool like Blender. Every time this happens, I think, "Why am I using SketchUp if I have to move on to Blender anyway?"
  • Blender

    • Pros:
      • Awesomely powerful with features like "select non-manifold" which enables correction of non-manifold geometry. Oddly, the feature only works when in two of the three available selection modes. There is no indication why. There is no documentation that I have found that explains this seemingly unnecessary limitation.
    • Cons:
      • The most difficult to learn/use software ever created. I can only assume the creators had never used a graphical user interface before. Few standard user interface conventions like copy/paste, methods of selection, or command keys work at all. Some features are not available through menus and can only be accessed through difficult to discover key combinations. The arguably most important user interface element is only available by typing 'n'. Not Control-n. Not Command-n. Just the single character, n. I used Blender for at least five years before discovering this even existed.
      • File importers mangle geometry. I have submitted fixes for the Collada File import at least six times for six versions of Blender over ten years. The fixes have never been incorporated. The bug is simple: Blender ignores the "Units" information stored in Collada files and assumes all units are "Inches". It's a strange choice for software that originated in Europe. I design in millimeters. Blender makes all my models 25.4 times too big.
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u/EMBNumbers — 4 days ago

Eurofirma Coach in 1:25 G Gauge

There are several different versions of this floating about on Thingiverse, so figuring out what goes where was a pain in the arse... We're going to finish building this version with some modified parts if necessary (the aggregate compartment for the undercarriage and the floor are designed to fit a specific length and combination of parts that is completely unclear) and then we're going to start over using only parts that I revised.

I'm almost done adding guiding pins for easier assembly to every body section (lining them up by hand, guhhhh it was horrible and error-prone), and I've also modified the end section with holes for a 3mm LED on each side and deflectors that can be painted, and room to spare for a thin acrylic sheet lens.

When everything is done, there will be variants of different lengths and scales, for those whom want to extend their roster of Piko coaches and need something that fits in with them, for those whom want no compromise in prototypical proportions, and for those whom just want a nice coach that goes through curves just fine.

Edit: While editing the files I prepared for rescaling and found out that the files are actually roughly 1:32 still. Assemblying the coach with the full amount of windows still leada to a shorter-than-prototypical coach. Oh well. More to fiddle with.

u/lillywho — 5 days ago
▲ 48 r/3dPrintingInModelRail+1 crossposts

EMD F7 Open Source 3D Print Model, coming to a printer near you!

So for the youth group of the model railway club I call home, the kids picked an F7 model off Thingiverse to print as our first 3D print locomotive project, but as I was tweaking minor details of the model for easier assembly and printing, I kept on running into aesthetic and constructional issues. No disrespect to the creator, but I got itchy fingers and saw that renovating the old model would be more fuss. So I did what I always do: Start from scratch! The screenshot is the result of about three hours of starting from a blank slate. In some spots it's not up to my standards yet, but it delights me to no end how far I've come in such a short time!

Like all of my creations, this will end up on Thingiverse for free and open source, because I'm just in it for the love of the game, and not for profit. Sharing my stuff for others to enjoy is half the fun, because a good thing shared is just at least 1.5 times better than keeping it to yourself, right?

Once I've finalised the proportions, the next step will be prepping the model for breaking it into sections so it can be printed without issue.

I'm probably going to go for 1:25 compromise scale, simply because of the megalomania of a huge model, but I'll see if I can make it easily adjustable for fully scale gauge 1 (1:32) and 1:29.

u/lillywho — 7 days ago

Competition for this Subreddit's Banner Image

Create a new post in this subreddit of an image of your 3D Printing in Model Rail accomplishments. It could be a design, a printed model, a model on your layout, etc. I'll change this subreddit's banner to the most upvoted image (that is on topic and meets community guidelines) submitted between now and midnight August 30 USA Eastern Time.

Banner images work best if they are 1920 x 384 pixels with a 5:1 aspect ratio, but I'll find a way to make the winning image work no matter what size and aspect ratio it has.

  • Do you want more contests?
  • Do you want a periodic contest for the subreddit banner?
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u/EMBNumbers — 5 days ago