IMACS progress report no. 35

B. Bigelow						1 March 2001

	Project Status

Currently scheduled tasks:				Status:

a)	Disperser server (DSS) design (Bond)		in progress (late)
b)	DSS drafting (Meyers)				IP
c)	DSS fabrication (Kowal)				IP
d)	SCAM filter server (Asa)			started
e)	Field lens mechanics (Hare)			done
f)	Field lens drafting (Myers)			on sched.
g)	Calibration system mech. des. (Hare)		on sched.
h)	Mask server integration (Asa)			late (90% compl.)
i)	Coll. fabrication (Danco)			5 mo. late 
j)	Coll. opto-mech assembly (Bigelow)		late start (March?)
k)	Long camera drafting (Cleary)			on sched.
l)	Center field guider mechanics fab (Storts)	on sched.
m)	Science Array controller fab (Burley)		late (95% compl.)
n)	Short Camera mech. design (Bigelow)		on sched.
o)	Filter procurement (Sutin)			on sched.
p)	Grism procurement (Sutin)			on sched.
q)	Motion control (MC) electr. design (Carr)	late (70% compl.)
r)	MC fab. (Asa)	    				late (50% compl.)
s)	Control software design (Birk)			on sched.

Project events:

Latest construction images can be seen on the IMACS web site:

http://www.ociw.edu/instrumentation/imacs

	Optics (Sutin) 

1) We visited REOSC (for fabrication of the aspheres) and liked what we
   saw.  Once we have a final construction design for the short camera,
   they will give us a final quote.

2) We have two replies from filter manufacturers, Barr and Custom Sci.
   Some decision has to be made about who to order from.

3) The clear glass spectrograph dummy filters have been bid out to
   Harold Johnson.  I never heard back from TORC on these.

4) We purchased CaF2 material for S02 from Schott for an outrageous
   price.  Let's hope that we can get it generated without breaking it.

5) Epps is working on finalizing the design for the short camera.
 
6) TORC is finishing up L04 and L06.  L06 is just being touched up.
   L04 just began polish on the second side.

7) Both Spectrum and Newport are working on tooling for coating.
   They seem to both be slipping on their time estimates by 1 week per
   week.

8) We have a RFQ in to Spectrum to coat the smaller IMACS optics.
   We can use this quote if Spectrum produces a much better coating
   than Newport.

9) We are currently planning in have a 200 l/mm, a 300 l/mm, and a
   600 l/mm grism initially.  I don't yet know what will physically
   fit into the current design.

	Electronics (Asa)

Completed in February:

1)   Electronic components ordered for guide camera stages
2)   Assy. dwgs. have been redrawn/reassembled and checked.
3)   Shutter parts have been modified and reassembled.  Modifications
     improved smoothness of motion and ease of assembly.
4)   FSS electronics were debugged, and the test frame was stiffened.

Planned for March:

1)   Assemble guide camera control electronics
2)   Fix top level grating tilt mechanism assembly drawings
3)   FSS1 - add magnets to shutter and test.  Check control electronics
     for power down during exposures
4)   FSS2 - parts need light-weighting and assembly.  Electronics need to
     be assembled.
5)   Instrument control electronics - a rack-mount chassis needs to
     be specified.  Cooling of the chassis to be investigated.

	Software (Birk/Clardy)

Clardy:

Done in February:

Met with astronomers to gather input on how mask generation is done,
and what features are desired for the mask generation program.

Began outline of mask generation program and its components, and the
input and output definitions.

Planned for March:

1) Construct schedule items, including definitions and time for:
    A) Minimum set of mask generation software
    B) Principle features requested by astronomers for mask generation
    C) Information needed for observing interface program
    D) Definition of mask generation output and input files
    E) Minimum set and features for observing interface program,
        and the current completion status of each.

2) Provide project manager with results of 1, and a description of
    how each item depends on others, and how they should be
    scheduled.

3) Do the work for items 1D, 1A, and possibly others.

	Detector Systems (Thomson/Burley)

No report this month.

	Mechanics (Bond/Hare/Bigelow)

Hare:

March:

* Reviewing Guide Camera part drawings.
* Revising guide camera assembly models.
* Compiling 'structureless' IMACS solid model in preparation for Mainframe 
  design work to begin.
* Have begun preliminary design of Calibration Unit.

Future:

* Review Shutter operation issues including:
  motor power down, holding torque, effects of magnets, controller limitations
  heat generation and dissipation, performance with change of orientation wrt gravity
* Design and build a jig to further test the Shutter.
* Review and Red-line Field Lens part drawings.

Bigelow:

February:

    1)	Completed (almost!) long camera drafting (Cleary)
    2)	Sent out RFQ for fabrication of the long camera mechanics
    3)	Completed (preliminary) cell designs for the short camera
    4)	Started front and rear barrel designs for the short camera
    5)	Received additional laser cutting tests on prototype slit masks
	from YAG and CO2 laser systems.
    6)	Received quotation for custom designed CNC machine to micro-mill
	slits in slit masks

March:

    1)	Complete long camera drafting (alignment parts and assembly dwgs, Cleary)
    2)	Start optical/mechanical assembly of the collimator
    3)	Request quotations for mask cutter based on commercially
	available mills equipped with precision height sensors
    4)  Continue short camera detail design	
    5)	Baffle mech. design for collimator

Bond:
   
    No report this month.  Work continues on DSS wheel, cable wrap, latch mechanisms.
    Drive, mirror cell, and grism cells remaining.

	Fabrication (Kowal/Storts)

Kowal:

February:

1) Work on IMACS was slowed to 25% of normal with my promotion to shop foreman. 
   This is temporary until I get things organized and a new machinist on the Haas.
2) Programming for the GTM trunion is complete.
3) Programming for flexure is half way through and a fixture for operations 2-5 has 
   been designed.
4) Modified shutter plates and coupling.
5) Titanium has been received minus the additional 2 pieces needed for the flexures.    
6) Titanium for the trunion and flexure has been sent out for saw cutting.
 
Planned for March:
 
1) Finish programming of grating tilt mechanism.
2) Visit trade schools to review their manufacturing programs and find candidates for 
   machinist position.
3) Conduct interviews.
4) Hire a machinist.
5) Hopefully getting a new machinist situated before the end of the month!

8)     Other Business

Next meeting:  10:15, 4/4/2001