PROGRESS REPORT
October 24 – November 22, 2000
Accomplishments / Status
Summary: Overall, 40% of the work from the Restart Review to delivery has been completed. The primary focus of this reporting period has been 1) solid modeling and 2D detailing of the Post-Slit Optical Bench; 2) fabrication of the OIWFS and Pre-Slit optical benches; 3) 2D detailing and fabrication of the Slit/Decker mechanisms; 4) 2D detailing of the Prism, Grating and Camera Turrets and 5) 2D detailing and fabrication of the Filter Wheel mechanism.
Next
Milestone:
The next major project milestone is the ordering of all remaining optics by
December 16th.
Earned
Value:
BCWS $ 1,431,064
SPI
0.75
BCWP $ 1,074,179
CPI 1.16
ACWP $
928,176
Project
Management:
(39% completed) The project plan may be viewed on the GNIRS web site at: http://www.noao.edu/ets/gnirs/
under Management, Planning. The
scheduled delivery date of the completed GNIRS instrument has not changed.
Systems
Engineering:
(100% of planned work) The activity in work included 1) structural analysis, and
2) systems engineering input to the design process.
The structural analysis is complete and the results show no need for
active compensation. Passive
compensation via the collimator mount will be included in the design.
No additional structural analysis is planned except to support collimator
mirror mount design. The analysis results were presented at the Quarterly Review
held on November 15th.
Cold
Motors: Four of 12 Phytron motors
were cold tested and 3 of these failed. All
12 motors were returned to Phytron, which is replacing all 12 motors.
We have received 4 of these new motors and are currently testing them.
If these pass, the rest of the motors will be sent from Phytron and
tested. We still have 2 spare
motors on loan from Gemini that we are using to support mechanism cold testing
until our own motors are available.
Mechanical
Design: (31%
overall including: Mechanisms 39%, Benches 35%, and Fixed Assemblies 7%).
Activities included optical bench solid modeling and detailing, focus
mechanism design, grating turret design, prism turret design and detailing, and
filter wheel detailing.
The
prism turret 3D design is 100% complete and 2D detailing is 6% complete.
The
grating turret 3D design is 10% complete and 2D detailing is 7% complete.
The
focus mechanism 3D design is 90% complete.
The
filter wheel mechanism 2D drafting is complete and released to fabrication.
The
acquisition mirror mechanism 2D drafting is complete and released to
fabrication.
The
Post-Slit bench 3D design and 2D detailing are 95% complete.
Mechanical
Fabrication:
The
camera drive spindle hub fabrication is 45% complete.
The
filter wheel mechanism fabrication is 81% complete.
The
acquisition mirror mechanism fabrication is 35% complete.
OIWFS
Bench fabrication is 60% complete. This bench is in fabrication in the NOAO
Instrument Shop and should complete on December 4th.
The
Pre-slit bench is in fabrication at a selected vendor and is 10% complete.
The
Detector mount assembly fabrication is 74% complete.
The
Motor Drive Assembly assembly/test is 9% complete.
Electronics:
(42%) Activities in this work package include 1) dewar and mechanism wiring
design definition; 2) array interface wiring definition; 3) cold stationing
definition; 4) thermal enclosure wiring definition and 5) OIWFS electronics
wiring and packaging definition.
The component controller thermal enclosure design is complete and a complete parts list has been prepared. The hard-stop circuit for the mechanisms and the Phytron drivers have been designed and the schematics released. Cable routing issues in the dewar are being addressed using a scale model of the optical bench.
Work
on defining dewar wiring and ALADDIN array interfacing details and detailed
mechanism wiring is in process.
The
thermal enclosure wiring and assembly are in process. Dewar and shield interface PCB’s are being fabricated at a
vendor, and all connectors and boards are on order.
Software
Development:
(27%) The Components Controller Software is 42% complete, lab support software
is 6% complete, and the high level Epics software is 1% complete.
The next phase is actual testing of the component controller code, which
will test motor drive and mechanism status and position sensing.
Component controller software completion is waiting for completion of the
electronics thermal enclosure.
Optics: 11 of 18 camera lenses and windows have been completed and
accepted. Only the BaF2 lenses
for the short red and blue cameras remain to be fabricated.
Two lots of BaF2 material have failed thus far, and a third
lot is in process. We are also
looking to other sources for these remaining lenses.
Grating
master rulings have been completed and tested.
Grating replicas are scheduled to be ordered by December 15th.
7
filters were ordered through the UH consortium. Two of these failed to meet
specifications and the vendor is expected to replace them.
Prism
drawings are complete and are scheduled to be ordered by December 15th.
Procurement:
(44%) Major activities in this Work Package included optics work at RMI, and
monitoring vendor fabrication.
Problems / Solutions
The OIWFS component late delivery will impact the
project next calendar year. A cost
and schedule impact change order has been submitted to Gemini.
Completion of the RMI camera optics procurement. Obtaining BaF2 material seems to be an industry-wide problem. We are trying to help RMI find sources of this material, and have also sent out requests for bid to other optics manufacturers to complete the lens build in case RMI defaults.
Key Personnel
Dale Circle, a Drafting Technician, joined the GNIRS team on October 30th.
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