Converting OO and HO to TT for 3D printing

[Baz657]

I've got a new toy - 3D printer. There aren't too many things currently available for download in TT scale but loads in other scales. Does anyone know the ratio for reducing OO and HO to TT and maybe even increasing N to TT?

[Ivans Rails]

I'd love to see what you come up with.

[Baz657]

OO: 76.2/120 = 0.635 = 63.5%

HO: 87/120 = 0.725 = 72.5%

N (British): 148/120 = 1.233 = 123.3%

N (US & Europe): 160/120 = 1.333 = 133.3%

Brilliant. Just what I needed. Thanks.

 

 

[Too Tall]

The buildings I have done, I basically did the maths as above, then checked the door heights, it it wasn't close to 16.6mm I rescaled until it was slightly_smiling_face

[John-357061]

3D printers are great. The one issue I have run into when scaling down is the detail can get too small and not print or become very fragile.

I found signals that I was able to scale down. Also telephone box and post boxes. Needed to modify the telephone box to print correctly on my resin printer.

[Baz657]

I'll start with easy stuff like a terraced house in the next few days. Still practising and getting to know the basics.

[Baz657]

Overall, quite pleased the way it came out. I'm playing with the software to make the brick and roof tile effects better and to create 2, 3 and 4 joined.

[Too Tall]

Looking good.

I too, only recently acquired a 3D printer, and am still getting the hang of the CAD side of things.

I have spent a day and a half designing a warehouse/ex workhouse/brewery (or something as yet undecided) as I couldn't find one I was happy with size wise.

Partly my uselessness at CAD, (I can only get my head around tinkercad atm) and partly the software doing strange things and running into limitations.

Many moons (25 years ago) I used to work with cad/cam software, but I think over time I have suffered Homer Simpson issues, and its all been pushed out of my brain by newer information smiley

But, I think I have it ready to print .. around 7 files with the longest reporting around 4.5 hours to do, ranging down to one of around 23 minutes.

In total it will take around 11 hours to print everything for a 3 story high 160x72mm building (with a couple of sticky out bits) relieved

[My name is Bond]

If you don’t mind me asking which printers are you using, what CAD software is being used, and can they operate from an iPad, or is it PC or laptop based only?

In the house image above how many parts are there (presume 6) and are the doors and windows within the wall section printed separately and fitted into openings or printed monolithically as the wall piece is produced?

I have today purchased a 3d printed kit station building, platforms and fencing from a well known company which is my first foray into this 3d printed world, so am curious to learn a bit more. I have no issues with time building kits but I do understand the needs of those who are time restricted and waiting patiently for the Hornby offerings to appear.

[Baz657]

Latest experiment, a row of four terraces. Pics below (rear elevation last).

I've looked at reducing various OO and HO rolling stock items but realised that the couplings would be different, so that will need a rethink. Like most things, it's a learning curve.

[Baz657]

If you don’t mind me asking which printers are you using, what CAD software is being used, and can they operate from an iPad, or is it PC or laptop based only?

In the house image above how many parts are there (presume 6) and are the doors and windows within the wall section printed separately and fitted into openings or printed monolithically as the wall piece is produced?

I have today purchased a 3d printed kit station building, platforms and fencing from a well known company which is my first foray into this 3d printed world, so am curious to learn a bit more. I have no issues with time building kits but I do understand the needs of those who are time restricted and waiting patiently for the Hornby offerings to appear.

 

 

I'm using a PC. Using Blender to edit the files downloaded from mainly Thingiverse and then Cura to set up the printing and slicing. The printer is a Creality ender 3 s1 pro.

All the houses are printed in one unit with no extra support. I'm currently printing a single, twin, triple and quad at the same time - it'll take a tad over 24 hours to complete (pic below).

[John-L]

I’ve been working on a 16t Mineral Wagon in TT:120 scale. This is a body which will fit onto the Hornby 7-Plank (or vent van) chassis.

It prints really nicely on a resin printer.

 

If you want to try it the 3D printing STL file for the first version is available free here: https://skfb.ly/oJtXP

[Baz657]

Thanks. I’ll give a try on Monday. I’d looked at the OO wagons but the couplings would be different. The chassis is a good way to go. Is the rolling chassis available anywhere?

edit

looks like I’ve found one to print. Just need some axles and couplings.

[John-357061]

Arch laser have axis and couplings for TT

https://www.osbornsmodels.com/arch-laser-1380-c.asp

https://www.osbornsmodels.com/ocww-altt100-1120-metal-wheels-3-hole-disc-4-axles-55797-p.asp

https://www.osbornsmodels.com/ocww-altt101--tt-1120-couplings-x28pairx29-55724-p.asp

[Too Tall]

I’ve been working on a 16t Mineral Wagon in TT:120 scale. This is a body which will fit onto the Hornby 7-Plank (or vent van) chassis.

It prints really nicely on a resin printer.

 

If you want to try it the 3D printing STL file for the first version is available free here: https://skfb.ly/oJtXP

 

 

Nice work John-L.

I was looking to see if I could find any tanker bodies to fit on the current chassis as I would prefer larger ones over the small ones Hornby provides, but nothing out there I could find for UK rolling stock.

[Too Tall]

If you don’t mind me asking which printers are you using, what CAD software is being used, and can they operate from an iPad, or is it PC or laptop based only?

In the house image above how many parts are there (presume 6) and are the doors and windows within the wall section printed separately and fitted into openings or printed monolithically as the wall piece is produced?

I have today purchased a 3d printed kit station building, platforms and fencing from a well known company which is my first foray into this 3d printed world, so am curious to learn a bit more. I have no issues with time building kits but I do understand the needs of those who are time restricted and waiting patiently for the Hornby offerings to appear.

 

 

I am using Creality Ender 3 V2 Neo, using Tinkercad because its easy to learn, although I really need to learn to use something more powerful.

This double cottage was a downloaded file I adapted a bit and hollowed out. It prints all in one and takes a couple of hours or so IIRC.

I printed the window frames (not seen here) separately.

 

 

 

 

This ex workhouse now (to be) brewery below, I designed from scratch. It took a lot longer as it was printed as 4 walls, a roof, corners, joining structure and gutter/drainpipes.

It measures in at approx. 160 x 72x 95mm to roof apex.

As you can see it needs a bit of tidying before priming but probably took a total of around 21 hours, with the longest single part taking around 4 .5 hours.

 

 

 

 

Resin printers tend to be better for detail, No idea how they compare for print times, but you can get good results from plastic once you learn the nuances (I am still learning only having had it around 9 weeks).