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Mini Rover

by Kepler, published

Mini Rover by Kepler Mar 2, 2012

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Summary

I built this small prototype to test several concepts: the tracks made from O-rings, a simple robotic claw, and wireless communications with Arduino.

This thing uses:
My robotic claw http://www.thingiverse.com/thing:18339
Some parts from my previous designs http://www.thingiverse.com/thing:13298
Obijuan's Skymega board http://www.thingiverse.com/thing:14197 and battery pack http://www.thingiverse.com/thing:5079

See it move at: http://youtu.be/SQqVQEaMtno

UPDATE 3/8/2012: The part "front.stl" did not print correctly due to some dangling polygons. I have now replaced it with the correct file!

UPDATE 3/13/2012: Uploaded a folder with the scad files. Not very tidy though...

Instructions

Print and assemble! It's pretty straight fordward. I used O-rings for the tracks (80 mm diameter). You'll need two M6 bolts and nuts, as well as 8 M3 bolts and nuts.

The servo holder is designed for two Futaba S3003 servos. You'll need to modify them for continuous rotation.

Assemble the battery pack with 8 3M nuts and bolts

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License

Mini Rover by Kepler is licensed under the Creative Commons - Attribution license.

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what kind of nuts did you use for the M6 wheel bolts? The M6 bolts and nuts I have do not fit at all in the hex cutout on the front frame.

Hi, the front frame uses M3 self-locking nuts, not M6. I can't remember if they are different size from regular M3 nuts, but they should fit well!

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Very nice project/ I am thinking about installing a sensor in front instead of the claw. Do you have the scad files for the front portion of the rover?

Unfortunately I uploaded the design a couple of years ago and I have switched computers a few times since then. Even though I try to keep all my files, they seem to have been lost along the way. Sorry about that! You can probably import the .stl into a mesh editing software and modify it. Best of luck!

Did you use WIFI comunicatons? With another ARDUINO or RASPBERRY pi or any other device? Do you have the code, or know where I can find it? Best and good work

I was controlling the robot from my computer via bluetooth. There is a small module that I connected to the Arduino's UART. I'm afraid I do not have the code, but it should be as simple as sending a message through the Arduino's serial port! Best of luck.

Nifty little rover and I like your use of o-rings instead of tracks. Your photo shows three each side but you're only using one in the video. What was your experience with them?

I really like your design. But I can't seem to print the 'front.stl' file properly.

When I export it as a gcode on Slic3r, it says there are overlapping and intersecting facets. So when I try to print it,the model doesn't come out right.

Do you know how to fix this?

Looks great, do you think I could just use an arduino (maybe with roboduino instead) and do you have a link to the arduino ide you are using??

Thanks! Yes, of course you can use an arduino! All you have to do is control three servos, so the programming and control is pretty simple. I am just using the regular arduino ide, form http://arduino.ccarduino.cc

very well done! this is one of my favorite things that i've seen on thingiverse recently!

Robots are not quick to grab my attention, but there is something very charming about this one. Once the charm grabbed me, I admire the innovation of using O-rings, and it's spider like mandibles.

Love this little bot. What's the total size (minus the gripper arms)? Looks like around 3.5"x3x5"x2.5"? I'm looking to build an affordible swarm with, and this looks like a great platform.

It's a bit bigger than that: 120x110x50 mm.

50mm is the height of the rear wheels, the total height will depend on the battery holder and the microcontroller board you use. But if you are not going to use the claw, there is some free space in the front to rearrange things. Let me know if you finally decide to build this!

Thanks. I'm going to print and assembly one to play with. Probably use an Arduino style board. I have to begin with all bots inside of a 12"x12"x18" tall area. Fully extended and in a single layer with no overlap they have to all fit within an 18" circle. I think I can fit 9 bots in that circle. They don't have to be identical, so I could have some with and some without claws, depending upon the individual bot strategy. I'll let you know if I go forward with it :)

I have re-uploaded the file smallWheel.stl. The previous one was not the correct size!

Jon! I really like it a lot! Good job!!! Wonderful printbot!!

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