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Acquisition Camera: Troubleshooting Help

Acquisition Camera: Troubleshooting Help. Vern STAHLBERGER Institute for Astronomy August 21-2008. Comments and Purpose: Images not centered in Acquisition TV Camera (problems, especially with CSHELL Create this Document to help with the troubleshooting. Assembly Picture-1.

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Acquisition Camera: Troubleshooting Help

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  1. Acquisition Camera: Troubleshooting Help Vern STAHLBERGER Institute for Astronomy August 21-2008 • Comments and Purpose: • Images not centered in Acquisition TV Camera (problems, especially with CSHELL • Create this Document to help with the troubleshooting

  2. Assembly Picture-1 AO Spool AOK-301 Support Structure AOK-300 Top Plate Cover: AOK-317 George Mount AOK-400 (orange colored)

  3. Assembly Picture-2 X-Y Stage (yellow colored)

  4. Assembly Picture-3 AO Spool (partially transparent)

  5. Assembly Picture-4 (Top View) POM (Pick Off Mirror; Movable via X-Y Stage Covers for Acquisition Box removed! Animatics for X-Y Stage

  6. System1 Optics Ray Trace

  7. System2 Optics Ray Trace

  8. Collins CCD Camera & Focus Mechanism Lens Cell AOK-271 Filter Wheel AOE-100 Fold Mount AOK-205 (Movable) Fold Mount AOK-205 (Fixed) Apogee CCD Camera & Focus Mechanism

  9. Gimbal Mount Pickoff Mirror: AOK-100 AO Spool Some parts partially transparent

  10. AO Spool omitted

  11. POM Mechanism without Support Structure • Mechanism Description: • The Pickoff Mirror Support is a 2-Axis Gimbal Mount Mechanism whose axis are at right angles to each other and are co-planar to the front surface of the Mirror. The nominal angle of the POM is 45 degrees to the incoming beam • CCW and CW Rotation is limited to about 2 degrees (stops) in both axis • Compression Springs are used to preload Gimbal Frames onto Actuator ends (eliminating backlash) • Rotation is accomplished remotely using Newport Actuators (blue cylinders) • Note: This mechanism is difficult to service while installed inside the AO Spool. Remove everything up to, but not including X-Y Stage. (see next slides) • Checklist: • Do Actuator ends remain in contact with the Gimbal Frames at all times? Will require energizing the Actuators to verify • Are the Actuators themselves held firmly in place (check screws that hold Actuator Bodies) • Check Flex Pivots for breakage; check screws that secures Flex Pivots 8x) • Check Mirror Clips 3x (do they hold the POM firmly in place?) • For a parts list of Gimbal Mount Pickoff: AOK-100 go to… • http://irtfweb.ifa.hawaii.edu/~ao/Mechanical/AO-IRTF/AO-Acquisition-Camera-AOK/Assy-AOK/ a b Actuator a-axis Actuator b-axis

  12. Note: To access these screws disassembly is NOT required to what is shown in this picture!! Optics Base Plate: AOK-312 Relevant Screws Qty=4 X-Y Stage George Mount: AOK-400 There are 4x 10-32 Socket Head Cap Screws (SHCS) used to bolt the Optics Base Plate to the X-Y Stage All of them are accessible by removing the Top Plate Cover AOK-317 (see next slides). Side walls do NOT have to be removed!

  13. Access to 2x 10-32 SHCS

  14. Access to 1x 10-32 SHCS May need to move motor if not visible

  15. Access to 1x 10-32 SHCS

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