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snip
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1- The conversion factor of 1 LDU = .4mm isn’t exactly applicable to RP LEGO.
Some of my parts are loose, some are tight. We built in a little fudge factor
in the STL files, but obviously it wasn’t enough for some machines/part
features and too much for others. I knew LDraw was extremely simplified
compared to real LEGO, but nothing like experiencing it!
snip
Darrell
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Way cool!
Thanks for sharing.
On the topic of scale. What I’ve determined is the following:
the LDU to mm conversion is an exact conversion
However:
A 1x1 brick is only 7.8mm x 7.8mm
and the studs are located 8.0mm for one another (measured on center)
A 1x2 brick is 7.8mm x 15.8mm
again the are located on 8.0mm centers
A 1x4 brick is 7.8mm x 31.8mm
or in general
a 1 x n brick is 7.8mm x n*8-0.2mm
a 2 x n brick is 15.8mm x n*8-0.2mm
etc
Does this align with anyone elses measurement?
In the ldraw world, everything is modeled with no gap between parts. In the
real world, there is a slight gap between parts to ease assembly.
I’m sure the LEGO engineers have a rapid prototyping machine - wouldn’t it be
fun to see what parts they try out?
Cheers
Ben Fleskes
Big Ben Bricks LLC
http://www.bigbenbricks.com
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Message has 1 Reply:
 | | Re: My Big Phat RP Parts
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| (...) Thanks, Ben! Coming from you that means a lot! (...) I would also be interested in other people's results/trials. I suppose in a perfect world we could laser scan the parts, but... I don't know how far we in parts.custom want to venture into (...) (20 years ago, 27-Aug-04, to lugnet.cad, lugnet.parts.custom, FTX)
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Message is in Reply To:
| | My Big Phat RP Parts
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| Hey all, Just got my pix back from the Rapid Prototyping conference and thought I'd share.. (2 URLs) Folder Pending Mod> Full credit has to go to: Tom Burger (for designing the parts in the first place and making the DAT files freely available) Greg (...) (20 years ago, 13-Aug-04, to lugnet.cad, lugnet.parts.custom, FTX) !
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