1. AF2 and Wyffos for TO’s and duty engineers Michiel van der Hoeven October 2006 AF2 and Wyffos for TO's and Duty engineers

2. Purpose of this presentation Give an update of current status Give an update of current status Make people more familiar with instrument Make people more familiar with instrument Reduce unnecessary downtime Reduce unnecessary downtime Make people aware of existing problems Make people aware of existing problems Learn how to fix and avoid problems Learn how to fix and avoid problems Gain information during observation on performance Gain information during observation on performance AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

3. History of instrument History of instrument Overview components Overview components Sequence of operations ‘How does it work’ Sequence of operations ‘How does it work’ Known problems Known problems Diagnostics Diagnostics Duty checks Duty checks AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

4. History of instrument Instrument build by Durham in 1992 Instrument build by Durham in 1992 Commisioned at WHT in 1994 Commisioned at WHT in 1994 Gripper unit redesign by ING in 1997 Gripper unit redesign by ING in 1997 Upgrade to smallfibres in 2001 Upgrade to smallfibres in 2001 UpgradeWyffos long camera 2004 UpgradeWyffos long camera 2004 Software upgrade operating system OS9 to Linux in 2005 Software upgrade operating system OS9 to Linux in 2005 AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

5. Overview AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006 AG1 fiducial camera 10 fiducial fibres (10 metres) Wyffos cal unit

6. Overview of hardware components Robotic positioner AF2 Robotic positioner AF2 Fibre module Fibre module AG2 camera for fiducial fibres AG2 camera for fiducial fibres AG1 camera for acquisition AG1 camera for acquisition AF2pc’s AF2pc’s Power amplifier rack Power amplifier rack ICM 1900 rack ICM 1900 rack Wyffos spectrograph Wyffos calibration unit AF2 and Wyffos for TO's and Duty engineers Michiel van der Hoeven October 2006

7. Robotic positioner Linear slides for X-Y Linear slides for X-Y Servo motors with linear and rotary encoders Servo motors with linear and rotary encoders Brakes on X and Y slide Brakes on X and Y slide Mobile probe fitted to gripper unit Mobile probe fitted to gripper unit Off axis probe Used to measure geometric distortions in corrector Off axis probe Used to measure geometric distortions in correctorunit Y axis X axis Fixed probe AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

8. Gripper unit Z movement Z movement Theta movement Theta movement Pneumatic gripper operation Pneumatic gripper operation Tv viewing system (viewfibre) Tv viewing system (viewfibre) Mobile autoguider probe Mobile autoguider probe AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006 Z motor Theta motor Tv viewing system Gripper jaws

9. Fibre module 150 science fibres 150 science fibres 93 micron in diameter 1.6 arc seconds on sky 10 ‘fiducial’ fibres 10 ‘fiducial’ fibres each bundle consists of 10.000 fibres 5 micron each whole bundle 450 micron 8 arcseconds on sky 26 meter of science fibre fed to Wyffos 26 meter of science fibre fed to Wyffos 10 meter of fiducial fibre fed to AG tv camera at topring telescope 10 meter of fiducial fibre fed to AG tv camera at topring telescope AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006 prism Sharksfin where robot picks up

10. AG2 tv camera for acquisition AG camera head fitted onto instrument AG camera head fitted onto instrument Camera fed by fibre connected to mobile probe Camera fed by fibre connected to mobile probe Fixed probe as well fed onto it for mapping Fixed probe as well fed onto it for mapping AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

11. AG1 tv camera for fiducial fibres Camera fitted on topring telescope Camera fitted on topring telescope Camera fed by 10m fiducial fibres Camera fed by 10m fiducial fibres Backillumination mechanism for fiducial fibres Backillumination mechanism for fiducial fibres Ultradas camera system Ultradas camera system AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006 Ag camera Backillumination Fiducial fibres

12. AF2pc AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006 Industrial PC Galil motion controller card Linux operating system Flashbus frame grabber card Two identical pc’s Two IP addresses Both machines on network

13. Michiel van der Hoeven October 2006 AF2 Electronics in Ghril AF2PC1 AF2PC2 Power amplifier rack Inter Connect Module ICM 1900 AF2 and Wyffos for TO's and Duty engineers

14. Michiel van der Hoeven October 2006 AF2 engineering display One Monitor/keyboard for 2 af2pc’s One Monitor/keyboard for 2 af2pc’s Omniview switch box Omniview switch box Omniview switch box 1: AF2PC1 2: AF2PC2 3: Epics Bootserver AF2 and Wyffos for TO's and Duty engineers

15. Wyffos spectrograph AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

16. Wyffos calbration unit AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006 3 different lamps: -Tungsten -Neon -Helium Two filter slides

17. Computing Observers use AF2 Config program to produce their science fields with sky coordinates Observers use AF2 Config program to produce their science fields with sky coordinates This.CFG file is FTP to Taurus This.CFG file is FTP to Taurus Then with af2 setup (fieldname) the.FIB file is created which is send to the AF2PC Then with af2 setup (fieldname) the.FIB file is created which is send to the AF2PC The.FIB file contains the X-Y coordinates for fibre positions The.FIB file contains the X-Y coordinates for fibre positions AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

18. How does it work? Each fibre is placed on a star Each fibre is placed on a star The AF2pc knows all fibre positions from the previous setup field The AF2pc knows all fibre positions from the previous setup field On setting up a new field the gripper unit will move to each fibre to move it onto the next position. On setting up a new field the gripper unit will move to each fibre to move it onto the next position. The tv camera picks up at the fibre that is back illuminated The tv camera picks up at the fibre that is back illuminated After placing it will centroid again to confirm accuracy After placing it will centroid again to confirm accuracy Positioning accuracy less then 9 microns Positioning accuracy less then 9 microns AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

19. Wyffos AG1 Backillumination science fibres (Infrared LED array) Backillumination fiducials 3 red LED’s 26 metres science fibre 10 metre fiducial Science field. All fibre positions known in X, Y and Theta. With backillumination, position is confirmed and more accurate Fibre position X and Y confirmed with centroid by frame grabber card Gripper Fibre view system Fieldplate with 150 science and 10 fiducial fibres X Y Theta X Y Fibre view system

20. Known Problems Michiel van der Hoeven October 2006 AF2 and Wyffos for TO's and Duty engineers ProblemCauseSolution AF2 mimic blank AF2 server not running At whtics kill server and restart Lost fibre 1. Back illumination not on 2. No video signal 3. Frame grabber failure 1. Check both back illumination 2. Check Ghril monitor 3. Change to spare AF2PC AF2 not responding 1. AF2server not running 2. AF2PC needs reboot 3. AF2PC has a real fault 1. Restart AF2 server 2. Use shut account 3. Change to spare AF2PC

21. Diagnostics Diagnostic tools Diagnostic tools Whtics error messages Whtics error messages Epics engineering mimics Epics engineering mimics Video recorder Fibre Tv viewing system Video recorder Fibre Tv viewing system AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

22. Duty checks AF2 Robot AF2 Robot Check all fibres present af2 loadmodule Check all fibres present af2 loadmodule Make sure ADC is moving Make sure ADC is moving Wyffos Wyffos Check bias level Check bias level Take arc with calibration lamp Take arc with calibration lamp Move Hartman screen/ filters Move Hartman screen/ filters Make sure dry nitrogen is switched on Make sure dry nitrogen is switched on AF2 and Wyffos for TO's and Duty engineers

23. AG camera’s AG1 autoguider AG1 autoguider Switch Neon lamp on 1sec exposure Switch Neon lamp on 1sec exposure AG2 television Put robot in field to get some light falling on the fibre in the mobile probe Take one second exposure, fibre should be visible AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006 Mobile probeFixed probe

24. Future upgrades Calibration source in blue part spectrum Calibration source in blue part spectrum Improve reliability Neon lamp Improve reliability Neon lamp CCD mount rotation micro metres CCD mount rotation micro metres Stand-down to do gripper maintenance and alignment. Implement dynamic temperature control system Stand-down to do gripper maintenance and alignment. Implement dynamic temperature control system Recoat Wyffos relay mirror Recoat Wyffos relay mirror AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006

25. End For further information see: For further information see: www.ing.iac.es/~af2 www.ing.iac.es/~af2 AF2 and Wyffos for TO's and Duty engineersMichiel van der Hoeven October 2006