To be clear, I have 5 balancing issues with Robi that I hope are all related, and 1 microphone issue:

1. not properly SITTING DOWN (when requested to sit, when requesting sit-ups, etc.)
2. not properly STANDING UP (when requested to stand, when done with sit-ups, when done with push-ups, etc.)
3. falling at the end of BALANCING GAME
4. falling face forward to start PUSH-UPS (although completes push-ups successfully before failing to stand back up)
5. not bending up much for SIT-UPS (may relate to properly holding legs)
6. not facing person speaking (e.g., COME AND FACE ME)

And in all cases (e.g., sitting issue, standing issue), Robi's body seems to end up in the correct position, but on his back instead of butt when trying to sit, and on his back or stomach instead of on his feet when trying to stand. Meaning that it seems to be a loss of balance in the trajectory from the current position to the final one.

Thanks, I will look into that :)

Although, I can not understand how he can perfectly walk (forward and backward) AND dance, but not manage to sit and stand :( Again for sitting and standing, I am pretty sure his body ends up in the correct position, since when I shift him into his final orientation (roll him from his back to butt when sitting, and from his back to his feet when standing), he looks fine! It just seems like in his transition from his current position to the sitting position or standing position, he loses his balance a little :(

Well, it is disheartening to know that this is not common, since I felt like I followed all instructions and tests carefully and had hoped that this was a common situation of something people did not do perfectly that I could quickly resolve :(

In my case, all the tests passed at each stage before I moved to the next stage. Including in an early test finding that one arm was not moving correctly, disassembling it per the instructions, finding/fixing a screw that was not tightened enough and was obstructing a servo from fully moving, re-assembling it, and finally confirming that it then worked :)

And yes, I confirmed all the neutral positions at each stage in the build and before my current tests. Again, note that I believe his final positions end up correct - it is just the path in between that seems to have an issue. Although again, he can do his full dance sequence (perhaps one of the coolest things about him with the fast and dexterous human-like movement :) and return to neutral with NO problem. Not to mention walking forward or backward, then stopping in a neutral position.

I hoped that I would not have to go to the worst case scenario of disassembling almost all of him to check every servo, and them reassembling him almost from scratch :(

Sounds like a plan :)

I will mess with it on the weekend, and hopefully include all videos of what it can do and what it can't to see if that solicits any more specific ideas :)

Thanks :)

you may have a different version than I did.Unfortunately all my Robi magazines were ruined when by basement flooded recently so I dont have a way to post a copy of them.I will ask admin if there is a way to get a copy

Carl

thanks to our amazing Admin Mark here are the sections on balancing Robi.Please let me know you have any questions.

I put the small black pads under the servos in the feet as described in the section, but he still falls when he dances etc.

It's very strange.