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The purpose was to make an internet connected robot which is easy to assemble and disassemble. So the four wheeled robot uses an Intel Galileo board. This board interfaces with all other peripherals.
The basic building and working is shown in the video below,
snapbot_v1.skpThis is a 3d printable sketchup file of the first working robot.SSEYO Koan Play File - 13.15 MB - 07/24/2017 at 12:25 |
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snapbot_v1_exploded view.skpThis is a sketchup file for the exploded view of the first working robot.SSEYO Koan Play File - 13.38 MB - 07/24/2017 at 12:25 |
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snapbot_v2_working.skpThis is a sketchup file for the working second prototypeSSEYO Koan Play File - 9.40 MB - 07/24/2017 at 12:25 |
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The above prototype taught us a few lessons.
The above reasons and some more drove us in making the second revision which is under progress with VR possibility.
The github link for the code is - https://github.com/saipraveend/Snapbot_V2
VR app for the V2 Robot.
The below image indicates the two different parts of the version 2 robot - The one on the left is the main chassis, the one on the right is the exchangeable part. Both parts attach together with magnets shown.
The two parts snapped to each other. The visible magnets are for the mobile stand. The PCB is the new compact motor driver (L293d).
Basic motor run code test - with a castor wheel in the back for simplicity (Also stuck with magnet)
Adding the motors.
Adding the battery
Adding the driver
Adding Intel Galileo
Adding some wiring
Adding the wifi dongle and the LCD shield
Adding the wheels
Assembled.
The first step was to calibrate the 3d print, magnet and motor.
Based on this test a few changes were done and the final model is attached.
So next is sticking the magnets to this using some cyanoacrylate glue and giving it a quick spin.
Next step is to model the entire robot to leave out any obvious mistakes.
Sketchup is my preferred software for 3d modelling as it is simple to use and the availability of many pre-modelled components.
The SketchUp file for the model is part of the files.
The phone provision is kept in a simple fashion, needs to be tested after printing.
The slots have considered the spacing after measuring using vernier. ( Note : Measuring the magnets using the vernier was a torture as they kept getting stuck in the wrong places - If you have a good idea - do leave in the comments )
As the googling progresses the doubts have started to build up. The questions and solutions thought as logged below.
The components should be supported properly, encased so that it does not come out of the holding of the magnet.
Maybe, but instead of reading piles of papers or articles lets build it and see.
There is an option to go with ferrous or neodymium. So we got both types of magnets and compared their working, neodymium was the winner.
There are plenty of options in each shape, we decided to buy some cylindrical ones, some rectangular and figure it out as we are building it.
Each time we made a wheeled robot, the most time-consuming part is assembling the components and making it look neat (beautiful).
So this time when we wanted to make an IoT robot this idea struck upon us to make an easy to assemble 3d printed chassis for the robot where the components would be connected to the chassis using magnets only.
So the googling starts for similar implementations and how to encase the magnets within the plastic.
The sketchup files are in the attachments, you will need to modify based on your requirements
The final sketchup file with your chassis should be 3d printed
https://github.com/saipraveend/Snapbot - This is the github repo for the testing code that was used to run the robot.
saipraveen
Spencer
Ted Huntington
Leo Vu
Laurent