Let's Make Robots!

My first omniwheeler


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Update: Hmm.. I found that it pulls a trailer really well.. Hmm.. And the Omni's are really easy to navigate. Hmmm :)

I was waiting for my omni wheels to arrive, because I wanted to see if they where not the right thing for my main project.

While waiting and working on other small stuff, I got interested in making my own Mecanum Wheels.

After making that proof of concept, I decided to make 4 stable ones, and put them on a test-platform.

I got some triangled wood, drilled holes in it, and cut it in 64 pieces..


Double sided tape on;



Marked up 4 CD's:



Metal sticks in the holes, wheels on..


Till I had 4 wheels - of the homemade "Mecanum Wheels" - type:


Made 4 continous servos, and glued the wheels up on them:







And THEN I got mail:



WHAM! To hell with homemade wheels, I am back on testing for my main project :)



Really fast made, as you can tell, I stuck new wheels and some sensors and an old picaxe 28A board on the simple frame.

Made some code very fast one evening (atached, read it, it's short compared to how complex it performs), to test how to navigate with the setup of these interesting wheels..

Result & what I learned:

Really fun & effective, wicked fun to code omni! - check code. Info: servo passive is at 135, not 150, because I set them up with another controller.First commands, "servo" is just to initiate servos, they are set for real by the "servopos" commands

I think I may have to make more tests (read: Have more fun with new wheels) before moving on with the project :) 


Sorry it's no fantastic robo-post, but it is & was my first omniwheeler, a simple robot, but I had to post it because the moves are new :D

(Have to clean up my workshop now, I know, a mess, must clean up!)

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in Sideways

(the lack of it)

BTW; It's the same (lack of) force that keeps BOA off the wall most of the time!

Hows that song go, a fraction too much friction?

thumbs up

Whoo Hoo, another Frits Bot :D

Umm, don't those wheels have to be at a 45 degree angle to the chassis? Otherwise the Bot will be on the fritz :P

Yeah. I was thinking along the same line as you OddBot. Wont "normal" omniwheels mounted at a 45 degree angle imitate meccanum wheels? The effect would be the same as with the three imniwheels on the red Wowwee robot (you know the red whatsitsname with the grinning head).

Hm. must check ebay for cheap omniwheels now...

Yeah, he could try it with 2 motors on one stick, 2 on the other as he has, then cross the 2 sticks. Running one sticks' motors would carry the robot one direction, while running the other stick would take it a different diagonal. Running boht sticks at different proportions would get other directions of travel.
looks good!  looking forward to see what will it do!

and.... am I seeing another bot behing this one??   :-)
Bet that's the trailer to his Smile Bot :)
Nice! Is it able to slide to the sides since it has the omni wheels? What was the benefit of using them above regular wheels?