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Scratch Building In 2019 With 3D-Printed Parts
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 Posted: Mon May 13th, 2019 10:06 pm
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tebee
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It won't be a straight shrink - it's genuine 2ft gauge.

Where as On30 is 2ft 6", so you'd need to lengthen the crosspiece.

It should work in 1:35 though ! 

Tom




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 Posted: Mon May 13th, 2019 10:24 pm
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tebee
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OK use this part instead of the original.
 
You'll probably need bearings if you use pinpoint axles.


Scale everything at  13.7/48 = 0.2854  when you print 


Tom


Attachment: bf12 b 78 on30.zip (Downloaded 2 times)



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 Posted: Mon May 13th, 2019 10:28 pm
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tebee
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@John Ray

People on the 7/8ths Lounge have suggested the truck will not be strong enough. 

How strong do you think the 7/8ths version you printed is ?

Please can I borrow your photo to show them ?

Ta

Tom




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 Posted: Tue May 14th, 2019 12:44 am
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Sean W
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I started designing archbar trucks a few months ago...

Kinda abandoned the project, wasn't coming together the way I hoped.





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 Posted: Tue May 14th, 2019 01:38 am
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John Ray
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Tom, 

Your truck is very strong, it has a very robust web.
If you needed it to be stronger or more resilient,
you could change the material to PETG, ABS, or even nylon.

You are more than welcome to use the photo.
The truck as you see it is exactly how it came off the printer.
I only trimmed away the brim that holds it down to the build plate.
As shown, there is no glue holding it together, everything is a press fit.

If you need more photos, let me know.
If you want them, I could mail you the pieces I printed,
and you can test it for yourself.

John R.


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