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Other Stuff => Workbench => Topic started by: ulverston on 05 November 2022, 06:42:39 PM

Title: How to scale 15mm models down to 10mm for 3d printing?
Post by: ulverston on 05 November 2022, 06:42:39 PM

Hi Chaps,

My math is awful and I wondered how would one scale a 15mm STL down to 10mm? I am guessing to print it at around 60%? A more accurate figure would be much appreciated.

I have some free STLs of British Landrovers, Landrover Ambulances that I would like to print for a mate as our careers ended when the Gulf 11 started.... he may just remember sleeping in those ambulance Landies!

I have googled the life out of this with no definitive answer so if anyone has already done this your experience would be very useful.

Thanks

Title: Re: How to scale 15mm models down to 10mm for 3d printing?
Post by: fred on 05 November 2022, 07:01:49 PM

You want to scale at 10/15 = 67%

If you can check the size in the 3d software then you can compare this to the real world size too. As both 10mm and 15mm aren’t really scales - but 10mm is usually regarded as 1/150 scale. Do you have other vehicles are figures you are trying to match to, if so knowing the manufacturer might help.

Title: Re: How to scale 15mm models down to 10mm for 3d printing?
Post by: ulverston on 05 November 2022, 07:18:12 PM

Thanks, the vehicle STLs that I have are free by Bergman(?) and are meant to be 15mm. My friend already has a 10mm collection and as neither of us are scale modellers anywhere "near enough" will work. Printing these STLs out at 50% would give a 7.5mm scale no? So I was working on 60% being pretty close.... though in truth I am just guessing. There are some calculations on line to do this but .... it would be easier to find someone who has already done this

Title: Re: How to scale 15mm models down to 10mm for 3d printing?
Post by: zrunelord on 05 November 2022, 07:40:57 PM

I personally do not use percentages as I find them misleading.
I use MS 3D builder to import the vehicle or any other model then create a 15 or 18mm x 10 x 10 block or in your case 10mm & eyeball them.

If it looks right then it should print out right.
Hope this helps

Z

Title: Re: How to scale 15mm models down to 10mm for 3d printing?
Post by: ulverston on 05 November 2022, 08:13:35 PM

I have never heard of that system Runelord but I will look into it

Title: Re: How to scale 15mm models down to 10mm for 3d printing?
Post by: Fitz on 05 November 2022, 11:51:19 PM

Bergman's models are pretty reliably 1:100 scale, so scaling them to 66.6% will reliably give you 1:150, or 69.5% for 1:144.

Title: Re: How to scale 15mm models down to 10mm for 3d printing?
Post by: ulverston on 06 November 2022, 06:28:32 AM

Thanks Fitz I will use your recomendation, very good of you to help.

Title: Re: How to scale 15mm models down to 10mm for 3d printing?
Post by: fred on 06 November 2022, 09:29:30 AM

Quote from: fred on 05 November 2022, 07:01:49 PM

You want to scale at 10/15 = 67%

Quote from: Fitz on 05 November 2022, 11:51:19 PM

Bergman's models are pretty reliably 1:100 scale, so scaling them to 66.6% will reliably give you 1:150, or 69.5% for 1:144.