BW February 2018

2/1: Dr. Jones said we do need a light guide bundle highly polished on both ends for calibrating the fiber testing equipment. I chose bundle 406 with the black strap and got it on the polishing plate yesterday, but it was not yet aligned. This morning I aligned it as well as I think it will be. I think it needs just a little polishing with 1000 grit to get all the fibers to be exactly in one plane. Since the fibers on the left side are sticking out a tiny bit less than the rest, I want to twist right in front and left at the rear of the polishing plate.

2/2: I finished polishing bundle 406 upstream so we have a bundle highly polished on both ends.

I also reviewed the fiber testing equipment so I will be ready to discuss it next week. That way I can show what I know and learn what I need to.

2/5: I did some fusing practice, and the strongest fuse that I measured held 1200 g plus the hanger. It broke under 1300 g and the hanger. Dr. Jones said wings are unavoidable, and I should remove them with a razor blade, not sandpaper.

2/8: Jim said I should keep a separate logbook for fiber testing. I should include links to the histograms of run results and also to the text files (maybe on Gluey?) that can be opened with a spreadsheet. Once I test fibers, they should remain in the same bundle position for all subsequent tests. I should note anything unusual, such as fibers that need to be sanded to go in the chimney or fuses that break.

I told Jim about the leak in the splicing unit that Ann Marie mentioned to me. He found that it was coming from a hose connection. He tried to fix it, but the connector broke and we will need to order a new one.

I did six or seven test runs this morning with the dark box. After run 1359, they stopped completing. Jim looked at the cron.log and said things were hanging there. My test runs would not complete if I used the commands in the browser. He also said the relative pulse normalization should not be zero. I had not noticed that it was zero. The results looked fairly good otherwise. The only unusual feature I noticed was an isolated spike sometimes appearing near the highest part of the plot. It reminded me of a TV or radio antenna on the slope or at the top of a hill.

2/9: I asked Jim to get me started on fiber testing. He can do that tomorrow. I also requested 0.188" washers for aligning sci-fis. I would like to find the knife for removing extra material and burs from the printed parts.

Jim showed me that the scraper knives are in a desk drawer in room 403. I removed some excess material from the sci-fi collar that was on the desk in 403.

Then I put 400 grit paper on the polishing wheel to get ready for polishing sci-fis.