Guys, I have been printing with my ROBO R1Plus printers (2) for about 4 years and made many free cars off of the “THINGIVERSE” and had good success. This is I believe where the Container STL file that was printed by one of the contributors here on this site.
I print on Medium resolution and to print that 20’ container would be about 12 hours to print the parts with 40% density. 80% density would double the time.
I have been using PETG filament exclusively for the last 3 years as the ductile temperature is in the 160 degree area where PLA is about 130 degrees. Direct sun on a dark color painted item that is 40% infill/density will just deform with PET.
This is what I have found. I do live in AZ so you may have different results.
I unboxed my first printer $700.00 dollars (My second printer cost $250.00 2 years later) and started printing that night. What fun! this process is pretty easy to learn and the printers have come way down in price. My printers have a 8" by 10" platen printing area and this allows one to print a 40’ car in 2 pieces.
My Calculation for 129th scale is .4137" to the foot.
Someday I will post photos of my projects, but go to the Thingiverse and check out what is there.
To get started you will need a computer that has big memory “RAM” and a fast processer ( Cant’ remember the specs) now but most gaming computers will have a good Graphic Card (Important) there are sites on line that with a little research you can get the specs.
Any of the basic printers will give you good results. Use PLA Filament to start as this will teach you how to use the printer and is the cheapest, but the products you print with PET will not play well with the sun. Maybe solid pieces will work but with 3D printing the thicker your print is the longer it will take to print.
you will need a slicer program, I use 3D Builder and you can breakdown a (OBJ. file) this is a 3D object that is not segmented into flat pieces. I’m working on a 50’ High Cube Box that was in N scale object file. you can take that file and “slice it” into pieces that will fit in your printers print area.
The program I use with my printer is called Matter Control and is super easy I also have Cura but that one I find difficult to understand.
3D printing will give you great results and is very satisfying when the drawing is displayed on the printer! You don’t need to have a CAD program to print off the internet. STL files and OBJ files typically will work. You will need a knowledge of Scale as many of the files will be 1/32nd my printer software has a process where you can adjust the scale/size/ratio of a drawing. It will help if you have a reference drawing from a magazine/internet to reference as if you were going to scratch build a part. This is the same process only there is much more math and less cutting and shaping. I’m a C student in math, not that difficult.
Items printed in 1/29
2 50’ High Cube boxcar 22+ hours print time
2 58’ Gondola 18 hours+ print time
52’ Gondola 16+ hours
numerous Flatcars from 30’ to 40’
heavy duty 8 axle Flatcar + 10+ hours
50’ boxcar 16 Hours print time
SW1500 loco PLA not assembled - Distorted in the car while traveling to show it off. Bummer, 50 hours down the drain
DDA40X PLA not assembled it took 60+ hours to print
Many other items truck frames for example I only purchase wheels, bearings and springs, Kadee couplers.
Time to print is the bugger so selling 3d printed cars probably not going to be a good business model
Hope this helps
Howard