Hi!

Unfortunately, I have a strange problem with my EZ Robot JD.... my right arm Servos are having a strange behaviour!

I try to explain:

When i do the servo calibration, and start with the right Hand, when i go from 0 to -100, it opens the hand normally as it should. When i go from 0 to +100, it moves the second servo for the ellbow for 90 degrees! When i go on to the ellbow servo, thats connected to the hand, and go from 0 to -100, it again opens the hand! When i go from 0 to +100, it again moves the ellbow to 90 degrees! On both situations, it goes -90 Degress (pointing to the back of JD).

Initially, i thought that there might be something wrong with the servo connection cables, but everything seems to be fine there. I also rebuild JD, and re-did the servo calibration, tried different devices (my PC, 2 of my laptops, my iPad Air, its always the same..)

So there must be something wrong, but i cannot figure out what

Please, do you have any idea, what could possible be wrong? This is my second controller board, because the first one just stopped working suddenly, so i needed a new one (the reseller supplied this for free, thx!)

Thank you very much for your time and help!

Maybe i can send you a video, if you need to see what i do, and what JD does? 

Cheers!
Thomas