I just built a 42006 excavator, and the Linear Actuator jams, can not be rotated. I think the too sharp angle of the u-joint at the top of the boom is the reason. Is there a workaroud?
My aim is to make the robot communicate using protocol 802.15.4 through a USB dongle 802.15.4 over 6LoWPAN. The robot has to be able to get information from TelosB. I wonder whether this possibility ...