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LBT Q1 2009 Engineering and Software Review Highlights

This review covers the progress, additional progress, open issues, and planning for the Mount Control System at LBT in Q1 2009. Includes updates on encoder fixes, telemetry subsystem support, new DSP algorithm, and upcoming tasks.

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LBT Q1 2009 Engineering and Software Review Highlights

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  1. LBT Q1 2009 Engineering and Software Review MCS Mount Control System

  2. Highlights (Q1/2009) Fixed azimuth and elevation absolute encoders GPS failed Refined Azimuth encoder scale Damaged left elevation encoder tape LBT Q1 2009 Engineering and Software Review

  3. Progress (Q1/2009) • Consolidate Az and El DSP code and check it into svn (√ partial) • Update FPGA code and check it into svn (√ partial) • Fix absolute encoders (end-run for Issues 220, 362, 511, 1230) √ • Add telemetry subsystem support (test version) • Some testing time scheduled in February √ LBT Q1 2009 Engineering and Software Review

  4. Additional Progress (Q1/2009) • MCSPU altered to work with new DSP slewing algorithm • Auto-unwrap feature added at the beginning of a slew in azimuth • Sequence numbers added to the polynomials to aid in debugging PCS/MCSPU problems • MCSPU log file management has been changed to retain all log files • MCSPU software is ready for DGR • Ordered new elevation encoder tape LBT Q1 2009 Engineering and Software Review

  5. Open Issues • Technical • Encoder reset is not sufficiently reliable (Hardware) • Drive startup is not reliable (TPLC) • ELFR motor encoder is unreliable • Azimuth tracking performance is poor at certain speeds • A lot of cleanup / development is required before commissioning • Schedule • Telescope time is very competitive • Financial • Significant upgrades are unfunded for this year • Resource • Very limited Engineering / Software resources for further development LBT Q1 2009 Engineering and Software Review

  6. Planning (Q2/2009) Continue testing new version of the DSP code as telescope time becomes available Update Azimuth tuning Change encoder initialization routines to utilized the absolute encoders Install elevation encoder tape (Q3+) LBT Q1 2009 Engineering and Software Review

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