Nasa's Curiosity Mars Rover Expected to Resume Arm Movements Soon

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Nasa's Curiosity Mars Rover Expected to Resume Arm Movements Soon
Nasa's Curiosity Mars rover is expected to resume arm movements this week while analysis of what appears to be an intermittent electrical short circuit in the drill continues, the US space agency said.

A fluctuation in current triggered a fault-protection response that immediately halted action by the rover during the mission's 911th Martian day.

Since February 27, the rover team on Earth has avoided driving Curiosity or moving the rover's arm while engineers have focused on diagnostic tests.

Science observations with instruments on the rover's mast have continued, along with environmental monitoring by its weather station.

"Diagnostic testing this week has been productive in narrowing the possible sources of the transient short circuit," said Curiosity project manager Jim Erickson of Nasa's Jet Propulsion Laboratory, Pasadena, California.

"The most likely cause is an intermittent short in the percussion mechanism of the drill. After further analysis to confirm that diagnosis, we will be analysing how to adjust for that in future drilling," he informed.

The sample-collection drill on Curiosity's robotic arm uses both rotation and hammering, or percussion, to penetrate into Martian rocks and collect pulverised rock material for delivery to analytical instruments inside the rover.

The electrical short circuit occurred while the rover was transferring rock-powder sample from the grooves of the drill into a mechanism that sieves and portions the powder.

Once fixed, Curiosity will resume climbing Mount Sharp. Nasa is using Curiosity to assess ancient habitable environments and major changes in Martian environmental conditions.

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Further reading: Curiosity Rover, Mars, Mars Rover, Nasa
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