There are two variant of that, which look very similar:
Stud.IO lists them as:
Brick, Modified 2 x 4 - 1 x 4 with Recessed Studs and Thick Side Arches
Brick, Modified 2 x 4 - 1 x 4 with Recessed Studs and Thin Side Arches
These can be seen below, thick in red on the left, and thin in blue on the right in the top picture (not a valid colour):
This pieces is indeed hard to find, as it is used in building vehicles but does not have a name that has anything to do with that purpose. It is part number 52038 and is called Brick, Modified 2 x 4 - 1 x 4 with 2 Recessed Studs and Thick Side Arches on Bricklink.
I eventually made my design available for download over at Shapeways with a CC BY-NC-SA license (login is required in order to download the STL file).
I tested it at my local maker space in PLA on a µDelta 3D printer.
For the electrical contacts, I tried with pins scavenged from a DIP IC socket like Cyril suggested but the pins were a bit fickle and easily ...
Recently I met with TeamSim. Its possibilities are impressing:
you can make own robot via LDD and export it to the program
you cam make own mat (FLL, WRO, sumo mats are already available)
you can program a robot via NXT-G
I have no chance to investigate this program in detail, but I think it's what you want.
I make a print (with silicon) of the Lego PF socket, in 2 halves.
I just need the C1 and C2 electrical contacts, so I'm just dealing with them, but you can go for the 4 contacts.
So in the bottom half, I insert two small pins from a DIP socket (for integrated circuits) in 2 tiny cuts I do with a kind of bistoury and insert the 2 pins in those two slots.
According to WikiPedia:
The moulds are permitted a tolerance of up to two micrometres, to ensure the bricks remain connected.
But, as I noted in a comment, that is in an industrial environment, where great care is taken to ensure that not just a one-off piece is right, but that the entire batch of pieces is right. They probably take a six sigma approach ...
I could not find a tool with this ability, so I made one using the Rebrickable API. You can find it here:
It parses an LDraw file and selects all the bricks of a specified colour (by LDraw colour number, eg yellow = 14), then for each unique piece it requests all available colours. Finally it ...
I have actually tried 3d printing lego on a prusa i3 printer at I think 5 microns using PLA. I found that they worked fine initially but they quickly started to lose their grip. I think the issue was the layers grind against each other which wears them down rather than the brick walls flexing to grip. You certainly won't be getting anything close to the ...
The Studio tool from BrickLink uses the LDraw Parts library and has both the POV-Ray renderer as well as a "Photo Real" renderer baked in for some fairly realistic renderings of your models.
A selection of wheels and axles. You can see the logos on the studs of the modified 1x2:
Apple Macintosh Sample Model:
Apple Macintosh Sample ...
I can see some Duplo bricks in LDraw parts library, which is used by Stud.io as well, so you should be able to work out instructions the same way you do with usual bricks.
One thing to note is that availability of Duplo parts in LDraw is rather limited.
Alternatively, you can use LDCad (which uses LDraw library) to create your model. In this case you can ...
Double nods to Phil B. and Zhaph - Ben Duguid ♦ for offering correct answers, but Mark Thrill has provided further detail that might be a program issue, or he might have just said these words in jest.
"I've been looking for it for hours on LDD..."
We know that certain versions of LDD do exclude pieces. The version of LDD that I'm using does have both ...
First question; yes. as long as they are your CAD models you can do that , for example on Brickshelf
Second question: In LDraw , A CAD program for Lego they have monorail parts, here
this may also be usefull
Monorail Network Planner Tool
I have now figured out that you can include submodels the same way as normal parts. In LeoCAD, go to the parts panel where you can select a category ("All Parts", "Parts in Use", ...), scroll to the very bottom and select "Models". Then you can select your submodels and incorporate them.
(For some reason, my submodels still don't show properly in LPub3D, ...
Look here: http://www.thingiverse.com/tag:LEGO
But be aware- as a single person manufacturing a LEGO compatible item, you might be open to litigation. You would probably win, but winning very frequently bankrupts people either way. Do you really require a unique piece that LEGO does not make? There are many custom sets around that are a kit of LEGO ...
.3DS is a 3D image file format, a rendering of what you designed in LeoCAD.
All information necessary to recreate your build (i.e. what bricks to use) will be stripped from it. I suppose that theoretically this information can be recreated for small builds, but for medium-sized to large builds, this will simply be infeasible.
Hence I think it quite unlikely ...
It looks like I might not be doing anything wrong after all. If I switch the preferred renderer from native to LDView under Preferences everything looks fine.
Maybe I should mention that I am using LPub3D 2.3.6 under Linux. At least the Linux version seems to be rather buggy. It regularly crashes with a segmentation fault when you try to edit the ...
LEGO Software in general doesn't work that great with Apple computers (I a speaking from experience). Try a couple of different solutions by searching the web, and contact LEGO Support. Hope you find a solution!