The following items were accomplished during the recent 3 week summer shutdown. While we are still waiting for some clear nights to test all of the work that was done this will give everyone a feel for what was accomplished by the site staff and folks at UW. 1. M1 was removed, washed, and inspected. The inspection revealed no changes from last year. 2. Linear Encoders were install on M3 for the axial supports 3. Pucks were installed on M1 where the axial load cells rest 4. M1 LVDT's were found to be sticking and replaced and calibrated 5. M1 load cells were calibrated 6. A sector load cell on M1 was found loose and repaired 7. B sector load cell on M1 was found bad and replaced 8. The error of the M3 stepper motors not ending on full steps was repaired 9. Repaired the M3 rotational problem with the slot sensor 10. Further test were accomplished towards automating the mirror covers 11. Numerous hard points between the building and the telescope pier were replaced with flex connections 12. The temperature wiring on the telescope truss was replaced with a shielded cable 13. The PMSS pumps were serviced 14. The main Az bearing was serviced 15. Changes were made to the M1 ventilation system to eliminate forces on the mirror 16. A new TCC version was installed 17. Electrical insulators were installed in the cooling lines for Spicam 18. All Instruments dewars were serviced 19. Modified dust covers for increased airflow around M3 20. Collimation and PMSS tuning were improved. We appreciate the user's patience during this time when the telescope was not available but believe that we are returning a telescope to you that will provide improved performance in the future. As always there may be a few bugs during the initial days following the shutdown as once again weather has kept us from fully ringing out the telescope prior to returning to science. Mark Klaene Po Box 59 Deputy Site Manager Sunspot NM 88349 Apache Point Observatory (505) 437-6822 mark@apo.nmsu.edu www.apo.nmsu.edu APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 447 in the apo35-general archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-general/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-general@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO