LBT Q Engineering Review MCSC Mount Control System

21-Dec-2007LBT Q Engineering Review Highlights (Q3/2007) Installed azimuth encoder read heads Installed azimuth encoder read heads Updated DSP interpolation code to handle azimuth encoder gaps Updated DSP interpolation code to handle azimuth encoder gaps Azimuth encoder is now operational Azimuth encoder is now operational Az and EL tracking now < 15 mas RMS Az and EL tracking now < 15 mas RMS Ordered spare azimuth encoder tape Ordered spare azimuth encoder tape Checked elevation brake capacity Checked elevation brake capacity

21-Dec-2007LBT Q Engineering Review Open Issues Technical Technical Occasional unexplained elevation tracking errors Occasional unexplained elevation tracking errors Low azimuth and elevation acceleration Low azimuth and elevation acceleration ELRL main encoder read head performance ELRL main encoder read head performance Cleanup necessary for commissioning Cleanup necessary for commissioning Schedule Schedule None None Financial Financial None (pending budget ‘08 decisions) None (pending budget ‘08 decisions) Resource Resource MCS competing for resources mainly against rotator development effort MCS competing for resources mainly against rotator development effort

21-Dec-2007LBT Q Engineering Review Progress (Q4/2007) Planning From Q3 Review Planning From Q3 Review Install azimuth main encoder read heads √ Install azimuth main encoder read heads √ Commission azimuth encoder (operational) Commission azimuth encoder (operational) Inspect/repair elevation brakes √ Inspect/repair elevation brakes √ Order azimuth encoder tape Q1/08 √ Order azimuth encoder tape Q1/08 √

21-Dec-2007LBT Q Engineering Review Planning (Q1/2008) Repair ELRL read head Repair ELRL read head Work on punch list for commissioning Work on punch list for commissioning