The ELEGOO Tumbller is quite a fun educational tool. At least from the prospective of entertaining a 6 year old and her father...
The robot on it's own was fun to assemble. Then after getting it to slowly chase her around the room for a bit, she lost interest.
It's made to be extensible with a little code and has an excess of mounting holes which encourage printing. First things first were a silly hat and mild improvements to ability to get back up after face planting.
Now what..? Who knows, but the project is live and must progress.
A sort of upturned sombrero type thing which round things can yammer about in.
Adds mass high up which increases stability and reduces period of oscillation.
Standard Tesselated Geometry -
889.24 kB -
06/04/2020 at 19:22
Why did it have only 1 arm? A pair of arms is clearly better. This makes it possible to get back up from either a backward or forward fall. In fact getting up is easier as 2 arms are more balanced - and I cheated a bit by extending them slightly to lessen the angle of tilt when leaning on one.
Standard Tesselated Geometry -
249.59 kB -
06/04/2020 at 19:22
The little robot is quite interesting. Probably more so for a budding teen who can get to grips with it all than a 6 year old and her father who's some sort of engineer already. But this meets in the middle.
The first thing to sort out was to give it a silly hat. Something that between a hat and a bowl seemed a good place to start (as a bowl just sitting on it's head with a Nerf ball in it worked well).
Then the arms - it only had 1. A pair seemed sensible, but modified to allow marbles to skitter about in them.
Now it's more fun to look at and stack stuff on, but the PID could do with a tweak. Well, it could have done with a tweak before increasing it's moment of inertia. That's for next time.