Hello, i'm following this tutorial
i did exactely like the tutorial says but one servo does what it should, the other one seems like it has not enought power.
for power source i'm using a 4 AAA 1.5 battery pack
this is the servo type im using http://www.servodatabase.com/servo/power-hd/hd-1160a
what's wrong? should i use different power source?