The assembling instruction suggests keeping V_S switch connected to V+ (the out of the box option) if one uses NyBoard_V0_2 with plastic servos. But surprisingly it doesn't work to me. A calibration process goes well and the cat can go to the rest position, but any complex move like walking or even greeting leads to the sudden servos rotating on arbitrary angles in arbitrary directions. This in turn leads to the blocked servos, servos overheating and the cat crashing.
I checked #define NyBoard_V0_2 in Instinct.h, calibrated the cat and the accelerator few times, checked different potentiometer positions but it doesn't help. Only thing I did not try is replacing the bootloader. Without any hope I tried to switch SW3 and it seems to work. So I have two questions on this:
- Did I overlooked something? Is there any way to power the servos via the step down chip?
- V_S connected to BATT works but when cat is walking its limbs shake noticeably. I cannot notice such a shake during other moves (greeting for instance). Is it normal?