I recently assembled an AR3, and am able to jog the joints just fine. However, when I went to do a calibration the joints were doing some weird things (going forward and backward) with absolutely no response to the limit switches. After some trouble shooting, I found that the limit switches are indeed getting good connection. But I am only receiving 0.6v back in the control box, which doesn't seem to meet the voltage threshold of the teensy. Has anyone else had this problem? I am unsure if getting a 3.3v power supply will fix the problem (assuming the teensy could draw more amps from that vs my computer), or if I need some kind of voltage step up? I see the encoders can run up to 5.5v so it doesn't look like I'd be putting them in danger. Another possibility is running the (encoder and limit switch) power wire to the robot with the 5v power supply currently already in the control box. However I am unsure of grounding issues between the teensy and computer. What do you guys/gals think?