Tiny Toy Dump Truck
by madscifi, published
Description
Captive wheels and dump box.
Inspired by toy tanker truck by jag thingiverse.com/thing:5273
The picture shows the series of intermediate designs.
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Printing on an SD3 turned out mostly okay. Front axle was fine, rear axle however was quite stuck and would not move. Hinge for the container was moving immediately, but broke after a few uses. Suggestions: leave more space around wheel axles, and increase diameter of hinge.
I know this is a bit of an old topic. But I found out that OpenSCAD has tendency to generate wrong STL files if your "difference" selections have matching faces with the origonal mesh.
For example:
difference() { cube([20,20,20]); cube([10,10,10]); }
Can generate a wrong mesh (might not do so in this case)
But:
difference() { cube([20,20,20]); translate([-1,-1,-1]) cube([11,11,11]); }
Will always generate a good mesh.
Awesome. I'll print it for my nephew!
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Print was sliced with Skeinforge:
Layer Thickness: 0.2mm
Perimeter Width over Thickness (ratio): 2.5
2011-07-05 The new -V2.scad file fixes a bug that occurs if you attempt to change the wheel_dia or body_lift variables. Otherwise, the design is unchanged.
2011-12-14 Added version 3 (V3) files. This version shortens the bed axle a bit and adds a cap to the bed axle sleeve. This constrains the bed so that it cannot slip so far out of alignment with the truck body when the bed is raised.
2012-01-03 Repaired all files so that they are manifold (according to the netfabb cloud service).
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madscifi -- I printed your truck on my solidoodle. The final side of the pickup's bay is a straight 90 degree overhang. On my solidoodle it's all drooped but in your picture it's nice and straight. How did you pull that off? What printer are you using? Your STL design doesn't include a support or anything that I could see.
Thanks
The prints I posted were printed on a Sells-style Mendel. I'm not aware of anything that would prevent a Solidoodle from printing this without support.
You'll notice that I oriented the trucks in my pictures so that the inside of the bridged surface is not really visible - it was far from perfect. You'll also notice that most of the images of the truck that others have printed are oriented such that the inside of the bridged surface is not visible.
However, it is certainly possible to print a good copy without support. The trick is to tune Skienforge (assuming that is what you are using to generate gcode) for printing bridges well. The following Reprap forum thread is a good place to start: http://forums.reprap.org/read....
Also, see: http://reprap.org/wiki/Calibra...
It is well worth tweaking Skienforge to print bridges well on your printer. Many other models depend on well printed bridges - the various whistles being the most popular ones that come to mind first.
I think I need a HBP, this just doesn't work too well with a raft. *DONT_KNOW*
PLA works without a HBP. Or, if you are using ABS, try an old CD that you want to destroy as a build surface. The ABS will stick to that pretty well without a HBP--sometimes too well.
Can anyone print it nicely at scaled down to 18mm? I tried and I obviously need a lot of bridge calibration. Also def. a smaller nozzle than .5mm
see more info here: http://omemon.wordpress.com/20...
Thanks for posting the photo with the intermediate steps in the design process.
I'd so click your flattr button -- if you had one!
I have a policy of always flattr'ing designs that I print out, and I'd really like to do it in this case too! Please get a flattr account. :-)
I love the idea of printing fully-assembled objects with moving parts.
Once someone figures out a reliable and easy water soluble support material I think that fully assembled objects with moving parts will really take off. There would be a lot fewer limitations in the types of designs that would be practical.
Printing on an SD3 turned out mostly okay. Front axle was fine, rear axle however was quite stuck and would not move. Hinge for the container was moving immediately, but broke after a few uses. Suggestions: leave more space around wheel axles, and increase diameter of hinge.