DEIMOS TEAM MEETING
Date 2/22/01

Attendees: Dave Cowley, Heather Mietz, Carol Harper, Barry Alcott, Jack Osborne, Jeff Lewis, Dave Hilyard, Chris Wright, Vern Wallace, Kirk Gilmore, Bob Kibrick, Sandy Faber, Greg Wirth (via phone), Matt Radovan

1.  Next Meeting:

Wednesday, March 7, 2001 at 9:30 a.m.

2.  CCDs, Mosaic, Controllers, etc.

CCDs:

Gerry Lupino and Sandy will be discussing Lot 14 (two more were sent to us by Gerry) in early March.

Mosaic (Kirk):

Dave Hilyard received the 10 blocks to be flattened. The shops will be modifying the clips to take the set screws.

Kirk looked at the engineering mosaic and at the backplane mounting holes. He will set up the test dewar and controller to retest the newly allocated engineering FC devices.

Dewar:

It is currently in the Electronics lab, and Terry is adjusting the limit switches. The focus stages will be released to Ken Dietsch for him to do tests; and should be completed by the end of the day today. It will then be released for Chris and Bob to finish up. Next Tuesday it will go under leak testing. We plan to bring it to the CCD lab late next week. The mosaic will be installed there, the dewar pumped, then brought back to the electronics lab.

Controllers:

Chris says the status of the controllers is basically in the same state since last DEIMOS meeting. Everything is working correctly except the "gain setting" for video board #8.

Bob is currently working on implementation of the Power PC board into the VME crate.

There is a possible timing issue in DMA, which is a problematic situation for the controller. Bob says that things work fine if tested over and over, but tests fail one out of every six times. Once this problem is resolved, the power PC boards can be signed off and purchased (this is CARA-loaned board). Bob and Chris hope to wrap up and solve these problems this week.

VME software is ported and running.

3.  Software

The software schedule was updated, and some items were shuffled around. Bob put more effort on the barcode and Piezo software (from Dean to Will and De). At the beginning of May all software will be complete except for misc. keywords.

The grating tilt test was done yesterday to see how stable it is, and it's performing up to their expectations. It is signed off. Dave wants to put it on the instrument for the next round of tests.

De is planning to test the dewar stages.

GUI Review: There are still some issues with the rotation control portion, and De will take another pass at this. She is writing up the results of this review and will then go back to writing code for the barcode and Piezo.

Will is working with Barry on rotation control systems. The associated electronics are on the instrument.

Bob is wrapping up the power PC and VME crates.

Steve is on the second generation of lickserv.

4.  Electronics (Barry)

The rotation stage is mostly tested and wired, as are the primary and secondary stages. The renishaw encoders were counting the opposite way, so this is being fixed. Barry is making a larger number in correspondence to a positive position angle. Barry has not tested the reflective fiducial but it is not a huge concern right now.

Ted is working on the panic buttons on the system, and they will be in line with the motor current.

Ted sent back the Galil control cards for rotation control to be updated to 64 I/O bits. Barry suggested that if they use current modules, there would be a lot less wiring involved. There are lots of functions on Galil controller 0 panel to wire which needs quality time. Barry ordered a spare 1910 amp board with an interface box to direct replacement if amp went bad. The re-wiring process takes about four days.

Carol and Dean re-tested grating #4 online. The grating motor is wired and tested - it interrupts motor power if clamps are unclamped.

The photometrics camera cable is done and needs testing when the camera is on.

The barcode reader is wired and tested, and we can read barcodes from it.

Carol is working with Chris on re-rewiring CCD cables. She came up with three different types: 90 degree connector, a braided cable, and an extension. One form of testing is putting these in the freezer to test rigidity. Carol wants to spread out fabrication of the new cables because they are tedious and time consuming.

The power cords for the calibration lamps are done, and the dewar focus is being worked on by Ken and Terry Pfister. The documentation on these is time consuming, but is being worked on.

Chris received the last two Leach boards so Bob Leach will start rebuilding the ones we sent him in several weeks ago. Bob and Chris will talk more later this week.

5.  Optics

The 10 moly blocks are flattened and polished within 40 micro inches. Dave is working on the filter-making process and has ordered cements for this. Sandy would like a slope figure from Dave H. when completed.

6.  Mechanical

Slit Mask:

Vern configured a new plunger to a 45 degree angle. It worked in all position angles, and is now in software's control.

Calibration System/FC Light System:

The box to store the FC fibers has been made, and the fibers need to go in the instrument.

Matt has no more plans for the calibration system at this moment. The goal for the lamp-changing is to keep access easy and the time it takes quick.

Cladding:

Jeff started on main barrel and the front end.

Baffling:

Nothing new.

Glycol Cooling:

Jeff is ordering new lines per the CARA folks. He will separate this from Electronics. The required twisted braid will be run by Dave.

Grating System:

The new grating box is done and bolted together except for the top plate (which is in Optics). Jack will weigh and test this early next week. Vern is testing sliders in Optics, then a decision will have to be made.

Space frame - Matt has done some FEA analysis using the 82 lb grating assembly as a baseline. He has data on the reactions at the contact points and is worried about the Z rotation. More info from Sandy is needed.

Jack modified slider #3 (for the cones) and Jeff has 2 drawings for this modification. Stiffness numbers from Sandy are needed. Ken is working on the clamping software, and we have all the Bimba switches. Slider #1 is probably going away, and slider #5, a combination of sliders #3 and #4, will probably be made instead.

Flexure:

Discussed previously.

Misc:

Per Barry, Dean was asking about air pressure sensors and how it might be easy to add a second one to the controller. We will buy and add them.

Concerning spares lists, Sandy wanted to make sure that keeping lists of spare parts was something going on now. Matt mentioned that part numbers and associated drawings are something Keck will want when DEIMOS is commissioned. These could go on the web as well.

7.  Alignment

Nothing new.

8.  Testing

Testing has been covered this throughout the meeting. Integrated testing begins early May. There won't be hatches or a red mosaic at that time. Bob's area of concern is the Power PC Boards.

9.  Site Report (Greg Wirth via phone)

Greg is on phone, will cover more during the next telecon. Per the site visit, the weight is the big issue right now. They are waiting to hear back on the limits of the Nasmyth platform from the designer.

Deformation tests will be happening next week.

Dave and Sandy would like the final report from the Site visit (Sandy would like it in ASCII). The next telecon is Tuesday the 27th at 10:30 a.m.

10.  Web Report (Heather)

Minor changes have been done to the site, such as removing budget information, updating the latest minutes on the web, etc. To complete the PXL page for Jason chin, the images need verification from Ken. Once this is done, the page will take about a half hour.

11.  Shipping/Travel

Sandy, Dave, Jeff and Heather are meeting with Matson at the Port of Oakland today. Jerry is analyzing camera shipping boxes, getting requirements, and determining how to test this all. We are also meeting with Sal, our risk management guy, at 9 a.m., March 6. Jim Bell is still looking at cranes in Hawaii.

12.  Schedule

The dewar and grating box will be on the instrument on March 15. Integrated testing will start 6 weeks after this (beginning of May).

The Preship Review will be around the end of June or early July. The Readiness Review will occur in the middle of May.

 

Minutes written by Heather Mietz, email: heather@ucolick.org