LBT Q4 2008 LBT Q4 2008 Engineering/SoftwareEngineering/Software

Review Review

TERCTERC

Tertiary Mirror Units Tertiary Mirror Units CommissioningCommissioning

6-Apr-20096-Apr-2009 LBT Q1 2009 Engineering RevieLBT Q1 2009 Engineering Revieww

Project SummaryProject Summary Polish mirrors Polish mirrors Coat mirrors Coat mirrors Attach loadspreaders Attach loadspreaders Integrate M3 units Integrate M3 units Coordinate s/w dev Coordinate s/w dev Acceptance test unitsAcceptance test units Install on telescopeInstall on telescope

6-Apr-20096-Apr-2009 LBT Q1 2009 Engineering RevieLBT Q1 2009 Engineering Revieww

Highlights (Q1/2009)Highlights (Q1/2009) SX unit amplifier faultsSX unit amplifier faults

Identified the situation leading to faultsIdentified the situation leading to faults Developed basic workaround Developed basic workaround Installed remote power switchInstalled remote power switch Ability to monitor amplifier remotelyAbility to monitor amplifier remotely

DX unit repair and installationDX unit repair and installation DX unit repairedDX unit repaired Installation scheduled (Q2)Installation scheduled (Q2)

6-Apr-20096-Apr-2009 LBT Q1 2009 Engineering RevieLBT Q1 2009 Engineering Revieww

Open IssuesOpen Issues TechnicalTechnical

Mirror safety devices pendingMirror safety devices pending Apparent amplifier firmware problemsApparent amplifier firmware problems

UMAC must be turned on many seconds UMAC must be turned on many seconds (~30) before servo units(~30) before servo units

Failure to do this puts the amplifier in a Failure to do this puts the amplifier in a state that will lead to a fault when enabledstate that will lead to a fault when enabled

This does NOT seem to be remotely This does NOT seem to be remotely resettableresettable

Revisions to amplifier firmware may correctRevisions to amplifier firmware may correct

6-Apr-20096-Apr-2009 LBT Q1 2009 Engineering RevieLBT Q1 2009 Engineering Revieww

Open IssuesOpen Issues

ScheduleSchedule Commissioning constrained by observingCommissioning constrained by observing

Financial Financial None/minorNone/minor

ResourceResource None, except that there is only 1 None, except that there is only 1

telescopetelescope

6-Apr-20096-Apr-2009 LBT Q1 2009 Engineering RevieLBT Q1 2009 Engineering Revieww

Progress (Q1/2009)Progress (Q1/2009)

Debug and fix DX unit Debug and fix DX unit Perform reliability tests on SX unit Perform reliability tests on SX unit Install DX cables on telescope (Q2)Install DX cables on telescope (Q2) Mount DX unit on telescope (Q2)Mount DX unit on telescope (Q2) Complete Commissioning/acceptance Complete Commissioning/acceptance

tests on both units (Q2+)tests on both units (Q2+) Design and build mirror safety Design and build mirror safety

devices? (Q2+)devices? (Q2+)

6-Apr-20096-Apr-2009 LBT Q1 2009 Engineering RevieLBT Q1 2009 Engineering Revieww

Planning (Q2/2009)Planning (Q2/2009)

Install DX cables on telescopeInstall DX cables on telescope Mount DX unit on telescopeMount DX unit on telescope Study amplifier problem (plan long term Study amplifier problem (plan long term

fix)fix) Complete Commissioning/acceptance Complete Commissioning/acceptance

tests on both units (Q2+)tests on both units (Q2+) Design and build mirror safety devices? Design and build mirror safety devices?

(Q2+)(Q2+)