Reports until 11:24, Friday 11 March 2011
H2 INS
hugh.radkins@LIGO.ORG - posted 11:24, Friday 11 March 2011 (617)
HEPI Horizontal Actuator Installation Interference
Doing a test install of the HEPI Horizontal Actuator yesterday on the NE corner of BSC7 I find an interference where the Actuator runs into the Housing.

See the photos attached.  The first photo(003) is the Actuator held by the lifting jig.  The second photo(001) shows the Actuator Tripod seated to the Crossbeam Foot and the third photo (002) shows the interference between the bottom support weldment of the Actuator as it runs into the HEPI Housing Side Frame.

It may be a unique condition of BSC7 but I think it will be a recurring problem.  The solution should be a simple permanent shim and I'll have to use longer bolts.  However, I'd like to investigate before deciding on a blanket solution.
Images attached to this report