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AdV-SAT (Long SAs Upgrade Installation (End Towers))
berni, dattilo - 12:39 Friday 19 February 2016 (33267) Print this report
NE vertical hoist (‘chiocciolone‘) motor problem

Paolo reported the impossibility of moving the NE vertical hoist motor.

Yesterday morning, and this morning (meanwhile Francesco prepared an adapter for the connector), we performed a few checks.  The summary is:

- we re-checked the integrity of the whole cabling  (although it was already done in theh Lab before the installation).  In detail, the external cable, the in-vacuum long cable from feedtrough to top stage, the in-vacuum short cable from top-stage to the connector on the motor case.   Everything was OK.

- we checked the resistance of the motor phases measuring  it on the Fischer connector of the motor case.  We found one of the 2 phases in short-circuit, exactly the one connected though the  pins 6 and 7 of the Fischer connector.  (connector pinout in the  attached file)

   To solve this problem, would be necessary to act inside the motor  case. 

 

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