@yuji simada, i had done it well with the similar batteries. some tips look like that, before type "c", you could insall batteries in the holder, but do not turns power on, and donot connect 4 limbs, head & tail. After typing "c", then to assemble and connect the 4 limbs(including knee parts), head & tail, then to calibrate 4 limbs,4 knees, head & tail one by one with typing command look like c8 -5(means calibrate the front left limb -5 degree) to match the calibrator. Then typing "s" to save.

Climbing up stairs is cool. would make the paws sharpen?

yeah I'm in Taiwan, good day to me, good night to you. Next shipping, I'II get new perk. Thx. I have to work~

Hi Rongzhong, Nybble is very awesome! At the first calibration, after I sending ‘d’, it could sit well, I thought it’s OK, and had not yet tested others actions, I took off batteries and took one night rest, then occurred as I had described. In fact, when I received the Nybble package, I was exciting very much. Then I assembled it quickly and locked all screws, wow, that really is awesome. At that moment, I remembered, I tried to put on the power, it had been occurred very whisper “pu-pu” and very a little smoking, I put off power immediately and found power reversed (BAD&TERRIBLE to myself). Then I read and checked the document ”Assembling Instructions for Nybble”, I found I made mistakes almost as reminded on the document,(:{} then I tried to do the first calibration immediately, it done as I had described above. Wow, I had been so exciting and rough mind to make mistakes. Thanking for your replies and prompts in details, I will take acre of Nybble more carefully. TKS a lot again.(all devices are OK, I think I ruined or mess up the power supplied system,but it could work although abnormal. Oh, watch out 9V Alkaline battery measured about 4000mA it seems too strong ,even connected with HC-05)

Sorry, I measured “9V” battery worked electronic current should be about 0.25-0.26A(250-260mA).

To see the google.doc on upside written. a cheap way is with a little burned knife, you could cut it easily instead of scissor somekind to trim.