Mobile Robot, With Printable Gearbox
by NickAmes, published
Although the printed geartrain is incredibly noisy and not terribly efficient, it is much cheaper than any gearbox that one could buy. Also, it's printed on the makerbot, which is pretty neat.
-Makerbot Printable Geartrain (8:1 reduction)
-Printable without heated build platform
-3mm holes in chassis and cover for easy modification/expansion
-Can accommodate motors up to 25mm in diameter (comes set for 22mm in diameter) and up to 30mm long.
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This looks like a really cool project . I have been able to print all the parts except the chassis. Using the Skeinforge that is part of Replicator 19 i get some sort of fatal error . Taking it in and out of blender deosnt seem to help . It will give me a valid g-code file if i use Skeinforge 7 but my bot is not tuned for that version ( also its 240000 steps!) . What did you use to generate your printable file?
ahh, I thought you had just left the other hole small and tapped it for the bolts, but the casing still turned out pretty cool for your bot. That is the nice thing about rapid prototyping, you can always fix the cad file and print another one if the first one didn't work. Ugh, it use to be so frustating hogging parts out of wood and metal only to find out my last five hours of work were trash.
I'll definitely have to print this out before digging too much deeper into this Arduino stuff.
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The robot is made of two identical halves, that each contain a wheel and the geartrain for that wheel. The wheel is clamped on the bearing with a M3 bolt that goes through the wheel and the output gear; the wheel and output gear shafts mesh inside the bearing bore to transmit torque. There are two middle gears between the output gear and the motor pinion.
After the chassis has been assembled, a cover is attached. There are several options available. Cover_Grid.stl is a cover with 1cm spaced 3mm holes. The two arduino covers allow an arduino to be mounted on the top of the robot. Cover_Solid.stl is a cover with just screw holes and a hole for the motor wires. Cover_Blank.stl is a cover without the top and bottom faces filled in, to make making your own covers easier.
The assembly instructions can be found at: flickr.com/photos/nickames/sets/72157624952160443/
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