m&m sorter #3

Sorts m&m's by color
DeltaRobot-0.02.zip3.44 KB

Videos: http://www.youtube.com/watch?v=Pbb9GOWaL4g and http://www.youtube.com/watch?v=mPakG8p3MHE

Update: Added schematic for the vacuum system

Code word were: CHEAP!

Cheapest RC servos I could get, Cheapest Arduino, almost. Straws from mc donalds, icecream sticks, rubber bands, Lots of scrapped stuff just waiting to be used in the workshop. Solenoids in the valves were from old tapedrives, and the valves them selfs were from old bicycle tubes. Vacuum and pressure comes from an old aquarium pump, reshaped to make vacuum too.

The dark disk is a sun shade, had to add that before filming outside, othervise color detection made too many mistakes.

"Exploded view" of lower arm:

"Exploded view" of lower arm

Lower arm:

Lower arm

Lower arm about to be connected to bolt on upper arm

Lower arm about to be connected to bolt on upper arm

Lower arm and the moving platform:

Lower arm and the moving platform


Two valves, the lower one disassembled

The pin visible at the end of the yellow tube pin of the bicycle valve. The brass tobe above goes over the pin. Since the pressure uses in the robot is low, +/- 0.15 bar, I could go with these simple home made solenoid valves.

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Really fantastic!! And your LMR Write Challenge solving made the cover page for non logged in visitors :D

I love it! Thanks :D

Wow, the new video is very cool. You just raised the bar on the Write LMR Challenge. Please go to that post and link back to your robot here. That is the coolest way to write LMR I have ever seen!

Thanks for your acknowledgement, here it is: http://letsmakerobots.com/node/2023#comment-71754

It works very well!

Can you post more pictures? :)

I have uploaded version 0.02 of my delta robot code used in this project. It's still a bit rough, it's my first attempt on making Arduino libraries public.

Feedback  will be appreciated

More code will follow soon.

amazing machine! And works great! :D Thank you for sharing!

Hi Mogul

This is a very VERY good job !

It's a very interesting job, which give urge to make the same ! (no copyright i hope :) 

Good luck with your projects!


Thanks for your acknowledgement!

Please do make something similar with or without your own ideas. Please have at least the same level of fun and joy as I had while building mine. Please ask if you have any further questions or thoughts bugging you!

Thank you mogul :)

It's a good thing to know that there is a prototype  that works.

This is for me a really interesting robot, because of the similarity with industrials robots.

I like very much your ingenuity (your  home made solenoid valve is amazing)

Good luck with your projects !

What a great robot!   can you please spec out the RC servo that you used? how did you know how much torque and rotation travel needed for your robot? is it limited to 180 degrees?  also i liked how you used mcdonald straws, they are the best free things you can get !