| Date |
Hours |
Description |
| ALL |
47.0 |
Total Working Time |
| |
|
|
| 5/19/07 |
0.5 |
Mirror Class #8 - Let the mirror temperature equalize to the
room, and then Dave K. tested it. Viola! A PARABOLA!!! |
| 4/14/07 |
2.0 |
Mirror Class #7 - Fletcher House, Chester - After the
Foucault Testing lecture, I had Phil test the mirror, and worked with him
to do a little figuring today. Unfortunately, the tester wasn't
quite set up as well as Dave K normally can set it up when it's at the
McGregor, so Phil didn't want to say for sure, but was leaning toward call
it finished, when we got done.
Post Class Assignment: Don't Touch It!!!! |
| 3/17/07 |
-- |
Mirror Class #6 - Cancelled - Snow |
| 2/17/07 |
-- |
Mirror Class #5 - Cancelled - Snow |
| 1/21/07 |
2.0 |
Mirror Class #4 - Figuring - Stared out with the Figuring
basics lecture. Then after having my polish and sphere checked, I
started doing some figuring today. Lots and lots of hurry up and
wait time, as it only takes 2-3 minutes for a couple passes around the
mirror, and then wait for a while for a turn at the tester. It did
allow for some fun time talking with others, and seeing what and how they
are doing. By the end of class, Dave was saying, "It's getting
very, very close. Probably next class."
Post Class Assignment: Don't Touch It!!!! |
| 1/15/07 |
1.0 |
Homework - Figuring - Set up the Stellafane tester, and
checked the figure. Overall, it looks very good. A nice flat
surface that 'blinks' all at once. A nice sphere! |
| 1/13/07 |
1.5 |
Homework - Polishing - A little extra polishing to ensure
that it's well polished and spherical. |
| 1/7/07 |
1.0 |
Homework - Polishing - All polished out! Clean all the
way to the edge. |
| 1/7/07 |
4.0 |
Special Project - Today we built our own Grinding/Polishing
bench. It came out really well, and is very sturdy. :-)
Will work well for polishing out my mirror. |
| 12/28/06 |
1.5 |
Homework - Polishing - Getting closer. About
0.25" from the edge. |
| 12/16/06 |
6.0 |
Mirror Class #3 - Polishing - Set up at the McGregor, and
then went down to the bunkhouse for the polishing lecture. Then,
back up at the McGregor for the day to do some polishing. Everyone
was impressed with my pitch lap, as we used the 'official' Dave Kelly
diamond shaped channels, instead of the standard square channeling.
It's getting very close to being polished out, as the laser shows no
reflection up to about 0.5" from the edge. |
| 12/11/06 |
2.0 |
Homework - Polishing Tool - De-pitched the tool, and
discarded the burgundy pitch. Jay had given us some extra Gugolz 64,
just in case at the last class, so we re-poured using that. Turned
out to be a great success. New possession, a nice looking pitch lap. |
| 11/26/06 |
2.0 |
Homework - Polishing Tool - Poured the burgundy pitch that
came with the kit today. Not sure if it was bad pitch, or if we got
it too hot, but it really went poorly. Way too mushy and ran down
over the sides of the tool. Too thin to use on top, now, so we'll
have to re-pour. Another good 'learning experience. :-) |
| 11/23/06 |
0.5 |
Homework - Polishing Tool - Applied Epoxy to the outside of
the plaster for waterproofing and strength. Even though it's 5
minute epoxy, we'll let it sit overnight to dry. |
| 11/15/06 |
2.0 |
Homework - Polishing Tool - Have more plaster. Time
for trial #2. Much better this time, using lessons learned from
trial #1. |
| 11/12/06 |
1.0 |
Attempted creation of a polishing tool. Found that we
weren't fast enough in mixing the plaster, and it clumped up before we had
it mixed and poured, so we're chucking that one up to a 'learning
experience'. Will have to pick up more plaster before trying again. |
| 11/11/06 |
6.0 |
Mirror Class #2 - Fine Grinding - Set up in the newly
renovated 'enclosed' porch to grind. Worked through 12 micron grit
and 9 micron and 5 micron. Ready to polish! :-) |
| 11/8/06 |
1.5 |
Homework - Fine Grinding - Completed 25 micron grit |
| 11/4/06 |
1.5 |
Homework - Fine Grinding - Completed 40 micron grit |
| 10/27/06 |
1.5 |
Homework - Fine Grinding - Completed 220 grit. |
| 10/25/06 |
1.5 |
Homework - Fine Grinding - Completed 120 grit. |
| 10/22/06 |
2.0 |
Homework - Fine Grinding - Completed 80 grit.. |
| 10/21/06 |
6.0 |
Mirror Class #1 - Edge Beveling and Rough Grinding - First
worked on edge beveling. Then we had our grinding lecture today,
then right into the 80 grit. By the end of the day it was already at
depth! Looks like it's going to be a 4.25" f/4.25 mirror.
The f/4.25 might change a bit, as polishing goes on, but should be fairly
close. |
