Let's Make Robots!

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razvan_iycdi's picture

Nice robot. I like the transmission method :) and it looks nice too.

ignoblegnome's picture

I haven't done much with this one for a while, but I may use this base for a robot brain soon.

The suspension's not bad, but it does have some problems. The Mr Basic kit used a nice plastic bracket for holding the train together on one end. However on the other end they used a pretty simple metal bracket that doesn't hold the drive axles as firmly. This was fine in the original configuration, but once I added the suspension, I really needed the extra control the plastic bracket provides. I might try to add something made from Polymorph to correct for this. This would be a great thing to use a 3D printer for.

I also had a bit of an issue with clearance. You can see in the video that it gets caught up sometimes. I can trim the mounting plate a little to improve this.

Prettybird's picture
   Good body design. Mabe bigger wheels would give more ground clearence. I like the indoor and outdoor designs and learned some stuff the hard way on my first bot. The real world is not all smooth floors. Looks easy to modify.
ignoblegnome's picture

I was thinking about putting on some 65mm wheels that DAGU makes, but Oddbot suggested that it would be too much for the plastic gears on Mr Basic, and that it would make turning difficult.

I'm going to experiment with the current wheels for now, and maybe try something bigger in the future.

Gareth's picture

I Like the High Rider design ;-)

If you allow the suspension to twist more (ie cut the clear tube in half) - provided its stable then i reckon the wheels will climb better ....... on my mr.flex i had only one spring as pivot which gave it good asymmetrical climbing with grip capability.

Looking forward to see it "Brainy"

ignoblegnome's picture

I'll experiment with that. The suspension actually has a lot of twistability in it already. I'll have to post a video showing the range of motion in each axis.

I think it will be interesting to see how the suspension operates at lower speeds. I'm probably going to have to wait until the new year to add real brains, but I'm thinking about creating some simple hardware based behaviors using resistor-capacitor networks and one or more 555 timers in conjuction with the Mr Basic Motor Control PCB, which I already have.

I plan to build a hardware based PWM that lets me select the speed for each motor with a potentiometer. I also want to do colision detection and cliff detection. It'll be interesting to see how complex I can get the behavior without real brains.

fritsl's picture
And I never even got my Mr Basic up and running. Glad to see that one actually could get some fun out of them! :)
ignoblegnome's picture
Well, I was bummed that I missed the Mr Basic Challenge 2, but I'm going to keep working on this little guy and get him really developed.
TeleFox's picture

Hehe, looks like Buzz Lightyear has an admirer =)

Great to see this bot in action, looking forward to seeing where you take him next.

maneuver's picture

really clever.

It seems like the plexi hit your obstacles before the wheels can get real traction and climb over'em. I would recommend shaving of as much as possible in the front