LBT Q4 2007 Engineering LBT Q4 2007 Engineering ReviewReview

MCSC Mount Control SystemMCSC Mount Control System

21-Dec-200721-Dec-2007 LBT Q4 2007 Engineering RevieLBT Q4 2007 Engineering Revieww

Highlights (Q3/2007)Highlights (Q3/2007)

Installed azimuth encoder read headsInstalled azimuth encoder read heads Updated DSP interpolation code to Updated DSP interpolation code to

handle azimuth encoder gapshandle azimuth encoder gaps Azimuth encoder is now operationalAzimuth encoder is now operational Az and EL tracking now < 15 mas RMSAz and EL tracking now < 15 mas RMS Ordered spare azimuth encoder tapeOrdered spare azimuth encoder tape Checked elevation brake capacity Checked elevation brake capacity

21-Dec-200721-Dec-2007 LBT Q4 2007 Engineering RevieLBT Q4 2007 Engineering Revieww

Open IssuesOpen Issues

TechnicalTechnical Occasional unexplained elevation tracking errorsOccasional unexplained elevation tracking errors Low azimuth and elevation accelerationLow azimuth and elevation acceleration ELRL main encoder read head performanceELRL main encoder read head performance Cleanup necessary for commissioningCleanup necessary for commissioning

ScheduleSchedule NoneNone

FinancialFinancial None (pending budget ‘08 decisions)None (pending budget ‘08 decisions)

ResourceResource MCS competing for resources mainly against rotator MCS competing for resources mainly against rotator

development effortdevelopment effort

21-Dec-200721-Dec-2007 LBT Q4 2007 Engineering RevieLBT Q4 2007 Engineering Revieww

Progress (Q4/2007)Progress (Q4/2007)

Planning From Q3 ReviewPlanning From Q3 Review Install azimuth main encoder read heads Install azimuth main encoder read heads √√

Commission azimuth encoder Commission azimuth encoder (operational)(operational)

Inspect/repair elevation brakes Inspect/repair elevation brakes √√ Order azimuth encoder tape Q1/08 Order azimuth encoder tape Q1/08 √√

21-Dec-200721-Dec-2007 LBT Q4 2007 Engineering RevieLBT Q4 2007 Engineering Revieww

Planning (Q1/2008)Planning (Q1/2008)

Repair ELRL read headRepair ELRL read head Work on punch list for commissioning Work on punch list for commissioning