[X] My Assistant

[charborob]

Sol 453 navcam pan:

We're moving again!
(Mods: I suppose it's time to start a new thread?)

[James Sorenson]

Kind of sound's like the grounding issue that happened on Spirit.

The drive conducted on Sol 2117 had been planned for one sol earlier, but was delayed after analysis of the Sol 2113 test led to discovery of a new electrical issue on Spirit. Engineers learned that a persistent voltage now exists between the rover electric ground and the rover chassis where no voltage should exist. This condition might be related to problems with the right-rear wheel.

http://marsrover.nasa.gov/spotlight/20091217a.html

Is it simular? And is the Rover wheel stall issue caused by the problem?

[mcaplinger]

Is it similar? And is the Rover wheel stall issue caused by the problem?

The Spirit description was less than crystalline to me, but I think the wheel problem was more a cause than a symptom of that bus imbalance (if that's what it really was.)

In all honesty, though I'm probably supposed to understand this, I'm not certain what the advantages of a balanced bus are. I think it just gives increased visibility into current paths. I do know that the low side of the bus could be completely shorted to chassis and our instruments would work just fine -- in fact, that's how we usually operate them on the bench.