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Mecanum robotics platform for the Raspberry pi

by destos, published

Mecanum robotics platform for the Raspberry pi by destos May 6, 2013

Thing Info

10674Views 2750Downloads Found in Robotics
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Summary

I've been working on this mecanum drive platform for the past couple months. Currently I'm using it with my raspberry pi as a remote controllable mecanum platform but that will change once I add some sensors to it.

Video of the platform driving around:

http://www.youtube.com/watch?v=DRAkcRtQzG0

Code related to the project can be found on my github account:

https://github.com/destos/mecanum-drive/
https://github.com/destos/Adafruit-PWM-Servo-Driver-helpers

Please let me know if you are building one and need any help.

Instructions

BOM

general

power system

mecanum roller and hub hardware

Instructions

  • print 28 of mecanum_wheel_nut.STL and 28 of mecanum_wheel_bolt.STL, I'll be calling these rollers from here on out.
    • can be printed in ABS or PLA
    • I had to print about 14 at a time, as I had a higher failure rate due to plastic shrinkage when printing many.
    • Print with at least one shell, as the external and internal surfaces should be rigid, especially on the nut version ( to prevent the nut from slipping )
  • print 2 of mecanum_base_v3_flipped.STL and 2 of mecanum_base_v3.STL, these will be our "hubs".
  • more instructions soon!

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Think you could make the wheel wedges 1mm smaller or so? I was thinking of dipping them in Plasti Dip from Harbor Freight for better traction

I used plastic dip on them as is. Seemed to improve the friction a little but cant say I played with them much after doing that. I actually painted the dip on with a brush though using the spray form of the dip may of given better results.

do you need to put the bearens on

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