TUE 11 MAR 2014 - Dave Thomson, Geoff Regan, Dave Owen & Brendan Martin.

Dave Thomson thinks that 16 inch F3 mirror is already about 600 grade and will only need 1 grinding grade, with a glass tile tool, before it can be polished.
20:16 - 11 inch glass tile tool on mirror.
20:17:45 - Dave Thomson started W strokes, 1 inch overhang, with 11 inch glass tile tool and 15 micron aluminium oxide/water mixture.
20:19:17 - Tool lifted. Mirror wiped with kitchen roll, sprayed with bottled water and wiped with kitchen roll.
20:20:30 - More Alox/water mixture pasted onto mirror with 2 inch paintbrush.
20:22:00 - Dave Thomson started 10 minute grinding session - mixture of W strokes and chordal stokes, both with 1 inch overhang, 0 inches off-centre. Also did 1 rotation of chordal strokes on 50% zone, with 1 inch overhang. Very little downforce used.
20:27:15 - DT stopped - More Alox/water put on moirror.
20:27:50 - Geoff Regan started 10 minute grinding session - chordal strokes, 4 inches off-centre with 1 inch overhang.
20:28:20 - Geoff Regan switched to chordal strokes, 0 inches off-centre with 1 inch overhang, for 1 rotation.
20:30:10 - Geoff Regan switched back to chordal strokes, 4 inches off-centre, with 1 inch overhang.
20:30:40 - More alox/water put on mirror.
20:31:35 - Geoff Regan switched to W strokes, with 1 inch overhang.
20:34:30 - Geoff Regan switched to chordal strokes, 0 inches off-centre with 1 inch overhang.
20:35:40 - Geoff Regan switched to chordal strokes, 1 inch off-centre, with 1 inch overhang. "Edge dragging, due to dryness"? - GR. More alox/water put on mirror.
20:37:28 - Stop. End of Geoff Regan 10 minute grinding session. Mirror turned about 20 degrees ACW. More alox/water put on mirror.
20:37:58 - Mirror turned about 20 degrees ACW. More alox/water added.
20:38:20 - Brendan Martin started 10 minute grinding session using chordal strokes - 0 inches off-centre with 1 inch overhang.
20:40:25 - Brendan Martin switched to W strokes with 1 inch overhang.
20:41:08 - More alox/water put on mirror.
20:42:25 - Brendan Martin switched to chordal strokes - 4 inches off-centre with 1 inch overhang.
20:43:40 - More alox/water put on mirror.
20:44:30 - Brendan Martin switched to chordal strokes - 0 inches off-centre with 1 inch overhang.
20:46:05 - More alox/water put on mirror.
20:46:35 - Brendan Martin switched to W strokes with 1 inch overhang.
20:47:07 - More alox/water put on mirror.
20:49:07 - Stop. End of Brendan Martin 10 minute grinding session. Mirror spun about 20 degrees ACW.
20:50:00 - Dave Owen started 10 minute grinding session.
21:02:00 - Stop. End of Dave Owen 12 minute grinding session. Total time this session = 12 + 10 + 10 + 10 = 42 minutes. Mirror wiped with kitchen roll, sprayed with bottled water and dried with kitchen roll. Hand held magnifier - 9x loupe - used to examine surface. Looks fractured and "scaley", rather than pitted - DT/DO. Glass tile tool not yet fully bedded in - glaze not fully worn on all tiles yet.
21:15:40 - Brendan Martin started chordal strokes - 4 inches off-centre with 1 inch overhang. Need to avoid 0 inches off-centre to avoid shortening the ROC.
21:30:43 - Stop. End of Brendan Martin 15 minute grinding session. Total grinding time today = 15 + 42 = 57 minutes. Mirror turned about 20 degrees ACW - turntable spins clockwise at 1 revolution in about 90 seconds.:00
21:31:05 - Dave Thomson started 15 minute grinding session - "feels better than first session" - "Firm, but not hard, downforce used.
21:46:00 - Stop. End of Dave Thomson 15 minute grinding session. Total grinding time today = 15 + 57 = 1 hour 12 minutes.
21:49 - Start of Dave Owen 15 minute grinding session.
22:04 - Stop. End of Dave Owen 15 minute grinding session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% W strokes, triple V, with 1 inch overhang. Total grinding time today = 15 + 1 hour 12 minutes = 1 hour 27 minutes.
22:04:40 - Geoff Regan started 15 minute grinding session. Mirror is 1.6 inches = 40mm thick at edge. Therefore, thickness ratio is about 10:1.
22:21:30 - Stop. End of Geoff Regan 15 minute grinding session. Total grinding time today = 15 + 1 hour 27 minutes = 1 hour 42 minutes. Tile tool rinsed with tap water. Mirror wiped with kitchen roll, then wiped with damp rag, then dried with kitchen roll. Mirror then wiped with isopropyl alcohol. "Feels smoother" - Dave Thomson.
22:30 - New ink lines put on mirror.
22:34 - Brendan Martin started 10 minute grinding session.
22:44 - Stop. End of Brendan Martin 10 minute grinding session. Total grinding time today = 10 + 1 hour 42 minutes = 1 hour 52 minutes.
22:47 - Start of Dave Owen 10 minute grinding session - 50% chordal strokes, 4 inches off-centre, with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
22:57:20 - Stop. End of Dave Owen 10 minute grinding session. Total grinding time today = 10 + 1 hour 52 minutes = 2 hours 2 minutes.
22:59:00 - Start of Geoff Regan 10 minute grinding session.
23:10 - Stop. End of Geoff Regan 10 minute grinding session. Total grinding time today = 10 + 2 hour 2 minutes = 2 hours 12 minutes. Mirror turned about 20 degrees ACW.
23:11:55 - Start of Dave Thomson 10 minute grinding session.
23:25:20 - Stop. End of Dave Thomson 13 minute grinding session. Total grinding time today = 13 + 2 hour 12 minutes = 2 hours 25 minutes. Mirror wiped with kitchen roll, then wiped with damp rag, then dried with kitchen roll. Mirror then wiped with isopropyl alcohol. "Might need another 60 to 120 minutes grinding, before polishing" - Dave Thomson.
Pictures from this session can be seen via main Wiki page here:
Dave Owen Wiki Page
Direct link to these images is here:
Photos - Tue 11 Mar 2014

SAT 15 MAR 2014 - Dave Thomson, Geoff Regan & Dave Owen.

11:30 - Arrived at Dave Thomson's, with Geoff Regan. Dave Thomson has done 10 minutes of a 15 minute grinding session.
11:35 - End of Dave Thomson's 15 minute grinding session. Total grinding time today = 15 minutes. Total grinding time since Tue 11 Mar 2014 = 15 minutes + 2 hours 25 minutes = 2 hours 40 minutes. Mirror rotated about 20 degrees ACW.
11:39:30 - Start of Geoff Regan 15 minute grinding session.
11:55 - Stop. End of Geoff Regan 15 minute grinding session. Total grinding time today = 15 + 15 minutes = 30 minutes. Total grinding time since Tue 11 Mar 2014 = 30 minutes + 2 hours 25 minutes = 2 hours 55 minutes. Mirror turned about 20 degrees ACW.
11:58 - Start of Dave Owen 15 minute grinding session.
12:13:20 - Stop. End of Dave Owen 15 minute grinding session - 50% chordal strokes, 4 inches off-centre, with 1 inch overhang and 50% triple V W strokes with 1 inch overhang. Total grinding time today = 15 + 30 minutes = 45 minutes. Total grinding time since Tue 11 Mar 2014 = 45 minutes + 2 hours 25 minutes = 3 hours 10 minutes.
12:14 - Tile tool hosed down with tap water. Mirror wiped with kitchen roll. Eyepiece used to examine surface. "Fractured appearance now mostly gone" - "Still might need another 2 to 3 hours grinding" - Dave Thomson.
12:24:50 - Dave Thomson started 20 minute grinding session. Using W strokes.
12:26 - Ink Lines wearing out evenly, after about 1/2 rotation.
12:27:00 - Ink lines invisible.
12:44:50 - Stop. End of Dave Thomson 20 minute grinding session. Total grinding time today = 20 + 45 minutes = 65 minutes. Total grinding time since Tue 11 Mar 2014 = 65 minutes + 2 hours 25 minutes = 3 hours 30 minutes.

12:47 - Start of Dave Owen 20 minute grinding session.
13:07:00 - Stop. End of Dave Owen 20 minute grinding session - 50% chordal strokes, 4 inches off-centre, with 1 inch overhang and 50% triple V W strokes with 1 inch overhang. Total grinding time today = 20 + 65 minutes = 1 hour 25 minutes. Total grinding time since Tue 11 Mar 2014 = 1 hour 25 minutes + 2 hours 25 minutes = 3 hours 50 minutes.
13:12 - Geoff Regan started 20 minute grinding session.
13:31:20 - Stop. End of Geoff Regan 20 minute grinding session. Total grinding time today = 20 + 1 hour 25 minutes = 1 hour 45 minutes. Total grinding time since Tue 11 Mar 2014 = 1 hour 45 minutes + 2 hours 25 minutes = 4 hours 10 minutes. Mirror wiped with kitchen roll.
13:56:35 - Dave Thomson started 20 minute grinding session - mixture of rounded Ws and chordal strokes, 4 inches off-centre. Both with 1 inch overhang.
14:16:10 - Stop. End of Dave Thomson 20 minute grinding session. Total grinding time today = 20 + 1 hour 45 minutes = 2 hour 5 minutes. Total grinding time since Tue 11 Mar 2014 = 2 hour 5 minutes + 2 hours 25 minutes = 4 hours 30 minutes.
14:17:00 - Start of Geoff Regan 20 minute grinding session - mixture of Ws and chordal strokes, 4 inches off-centre. Both with 1 inch overhang.
14:37 - Stop. End of Geoff Regan 20 minute grinding session. Total grinding time today = 20 + 2 hour 5 minutes = 2 hour 25 minutes. Total grinding time since Tue 11 Mar 2014 = 2 hour 25 minutes + 2 hours 25 minutes = 4 hours 50 minutes.
14:41 - Start of Dave Owen 20 minute grinding session.
15:01:20 - Stop. End of Dave Owen 20 minute grinding session - 50% chordal strokes, 4 inches off-centre, with 1 inch overhang and 50% triple V W strokes with 1 inch overhang. Total grinding time today = 20 + 2 hour 25 minutes = 2 hour 45 minutes. Total grinding time since Tue 11 Mar 2014 = 2 hour 45 minutes + 2 hours 25 minutes = 5 hours 10 minutes. Tool hosed with tap water. Mirror wiped with damp cloth then dried with kitchen roll. Surface examined with eyepiece - "Isolated pits but almost ready for polishing"? - Dave Thomson. New "pencil test" to be tried.
15:08 - Alox/water mixture put on mirror with paintbrush.
15:09 - Tool put on mirror and slowly moved around by Dave Thomson - listening for scratches.
15:10:15 - Geoff Regan started 20 minute grinding session with W strokes.
15:12:50 - lines almost gone from mirror.
15:30:17 - Stop. End of Geoff Regan 20 minute grinding session. Total grinding time today = 20 + 2 hour 45 minutes = 3 hour 5 minutes. Total grinding time since Tue 11 Mar 2014 = 3 hour 5 minutes + 2 hours 25 minutes = 5 hours 30 minutes.
15:30:30 - Start of Dave Owen 20 minute grinding session.
15:50:25 - Stop. End of Dave Owen 20 minute grinding session - 50% chordal strokes, 4 inches off-centre, with 1 inch overhang and 50% triple V W strokes with 1 inch overhang. Total grinding time today = 20 + 3 hour 5 minutes = 3 hour 25 minutes. Total grinding time since Tue 11 Mar 2014 = 3 hour 25 minutes + 2 hours 25 minutes = 5 hours 50 minutes. "Surface looks a lot better, still isolated pits but they are small and only about 1 in each eyepiece field" - Dave Thomson. Mirror hosed down, dried with kitchen roll and put back in box, ready for polishing. Machine hosed down. Carpet binned. Door end of garage also hosed down - ready for polishing.
Pictures from this session, Sat 15 Mar 2014, can be accessed via my Wiki page:
Dave Owen Wiki Page
Direct link to these pictures is here:
https://plus.google.com/photos/113388810726069166553/albums/5991826841102847009

TUE 18 MAR 2014 - Dave Thomson, Geoff Regan, Brendan Martin & Dave Owen.

16:30 - Arrived at Dave Thomson's with Geoff Regan and Brendan Martin.
19:52 - 4 litre water bottle put on 11 inch lap.
20:23 - Lap lifted from mirror and rinsed with tap water hose.
20:25:24 - Dave Thomson started 10 minute polishing session with 11 inch lap - using triple V W strokes with 1 inch overhang.
20:28:40 - Dave Thomson using chordal strokes, 5 inches off-centre with 1 inch overhang.
20:30:00 - Dave Thomson switched back to triple V W strokes with 1 inch overhang. Using Regipol 5 micron cerium oxide.
20:35:55 - Stop. End of Dave Thomson 10 minute polishing session. Mirror spun about 20 degrees ACW.
20:36:57 - Brendan Martin started 10 minute polishing session with 11 inch lap - using W strokes with 1 inch overhang.
20:41:35 - Brendan Martin switched to chordal strokes - 4 inches off-centre with 1 inch overhang.
20:47 - Stop. End of Brendan Martin 10 minute polishing session. Total polishing time today = 10 + 10 = 20 minutes.
20:47 - Dave Owen started 10 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
20:57 - Stop. End of Dave Owen 10 minute polishing session. Total polishing time today = 10 + 20 = 30 minutes.
20:58:18 - Geoff Regan started 10 minute polishing session.
21:07:58 - Stop. End of Geoff Regan 10 minute polishing session. Total polishing time today = 10 + 30 = 40 minutes. Mirror cleaned. Fresh cerium oxide/water mixture put on mirror.
21:12:30 - 11 inch lap put back on mirror.
21:12:50 - Geoff Regan started another 10 minute polishing session.
21:22 - Stop. End of Geoff Regan 10 minute polishing session. Total polishing time today = 10 + 40 = 50 minutes.
21:22 - Dave Owen started 10 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
21:32:40 - Stop. End of Dave Owen 10 minute polishing session. Total polishing time today = 10 + 50 = 60 minutes.
21:33:00 - Brendan Martin started 10 minute polishing session - chordal strokes, 4 inches off-centre with 1 inch overhang.
21:38:00 - Brendan Martin switched to W strokes with 1 inch overhang.
21:43:55 - Stop. End of Brendan Martin 10 minute polishing session. Total polishing time today = 10 + 60 = 1 hour 10 minutes.
21:44:30 - Dave Thomson started 10 minute polishing session - chordal strokes, 6 inches off-centre with 2 inch overhang.
21:50:55 - Dave Thomson switched to triple V W strokes, with wide central V.
21:54:17 - Stop. End of Dave Thomson 10 minute polishing session. Total polishing time today = 10 + 1 hour 10 minutes = 1 hour 20 minutes. Mirror sprayed with bottled water, wiped with kitchen roll, sprayed with bottled water then dried with kitchen roll.
21:59:35 - Geoff Regan started 10 minute polishing session.
22:09 - Stop. End of Geoff Regan 10 minute polishing session. Total polishing time today = 10 + 1 hour 20 minutes = 1 hour 30 minutes.
22:09 - Start of Dave Owen 10 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
22:18:45 - Stop. End of Dave Owen 10 minute polishing session. Total polishing time today = 10 + 1 hour 30 minutes = 1 hour 40 minutes. Mirror spun about 20 degrees clockwise.
22:19:55 - Brendan Martin started 10 minute polishing session.
22:29:35 - Stop. End of Brendan Martin 10 minute polishing session. Total polishing time today = 10 + 1 hour 40 minutes = 1 hour 50 minutes. Mirror spun about 20 degrees clockwise.
22:30:15 - Dave Thomson started 10 minute polishing session - chordal strokes, 5 inches off-centre with 1 inch overhang.
22:41 - Stop. End of Dave Thomson 10 minute polishing session. Total polishing time today = 10 + 1 hour 50 minutes = 2 hours.
Pictures from this session, Tue 18 Mar 2014, can be accessed via my Wiki page:
Dave Owen Wiki Page
Direct link to these pictures is here:
https://plus.google.com/photos/113388810726069166553/albums/5993248225442172849

TUE 25 MAR 2014 - Dave Thomson, Geoff Regan, Andre Piascik & Dave Owen.

18:33 - Arrived at Dave Thomson's with Geoff Regan. Dave Thomson just finishing 20 minute polishing session.
18:35 - Stop. End of Dave Thomson 20 minute polishing session. Total polishing time today = 20 minutes. Total polishing time since 18 Mar 2014 = 20 minutes + 2 hours = 2 hours 20 minutes.
18:39 - Mirror spun about 20 degrees clockwise.
18:40:30 - Geoff Regan started 20 minute polishing session - chordal strokes, 3 inches off-centre with 1 inch overhang.
18:46:35 - Geoff Regan switched to triple V W strokes with 1 inch overhang.
18:59 - Stop. End of Geoff Regan 20 minute polishing session. Total polishing time today = 20 + 20 = 40 minutes. Total polishing time since 18 Mar 2014 = 40 minutes + 2 hours = 2 hours 40 minutes.
18:59 - Start of Dave Owen 20 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
19:19 - Stop. End of Dave Owen 20 minute polishing session. Total polishing time today = 20 + 40 = 60 minutes. Total polishing time since 18 Mar 2014 = 60 minutes + 2 hours = 3 hours.
19:20:18 - Start of Andre Piascik 20 minute polishing session.
19:40:28 - Stop. End of Andre Piascik 20 minute polishing session. Total polishing time today = 20 minutes + 1 hour = 1 hour 20 minutes. Total polishing time since 18 Mar 2014 = 1 hour 20 minutes + 2 hours = 3 hours 20 minutes.
19:56:30 - Geoff Regan started 20 minute polishing session - chordal strokes, 4 inches off-centre with 1 inch overhang.
20:06:20 - Geoff Regan switched to triple V W strokes.
20:16:50 - Stop. End of Geoff Regan 20 minute polishing session. Total polishing time today = 20 minutes + 1 hour 20 minutes = 1 hour 40 minutes. Total polishing time since 18 Mar 2014 = 1 hour 40 minutes + 2 hours = 3 hours 40 minutes.
20:17 - Start of Dave Owen 20 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
20:37:50 - Stop. End of Dave Owen 20 minute polishing session. Total polishing time today = 20 minutes + 1 hour 40 minutes = 2 hours. Total polishing time since 18 Mar 2014 = 2 hours + 2 hours = 4 hours.
20:38:50 - Dave Thomson started 20 minute polishing session.
20:58:30 - Stop. End of Dave Thomson 20 minute polishing session. Total polishing time today = 20 minutes + 2 hours = 2 hours 20 minutes. Total polishing time since 18 Mar 2014 = 2 hours 20 minutes + 2 hours = 4 hours 20 minutes. Mirror rinsed with tap water, wiped with damp cloth and dried with kitchen roll. Eyepiece test showed that pits were now smaller and further apart, with a hazy background.
21:07 - Dave Owen started 20 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
21:27:30 - Stop. End of Dave Owen 20 minute polishing session. Total polishing time today = 20 minutes + 2 hours 20 minutes = 2 hours 40 minutes. Total polishing time since 18 Mar 2014 = 2 hours 40 minutes + 2 hours = 4 hours 40 minutes.
21:28:40 - Geoff Regan started 20 minute polishing session.
21:51:15 - Stop. End of Geoff Regan 20 minute polishing session - stopped for a few minutes to watch football. Total polishing time today = 20 minutes + 2 hours 40 minutes = 3 hours. Total polishing time since 18 Mar 2014 = 3 hours + 2 hours = 5 hours.
22:00:38 - Dave Thomson started 20 minute polishing session.
22:20:44 - Stop. End of Dave Thomson 20 minute polishing session. Total polishing time today = 20 minutes + 3 hours = 3 hours 20 minutes. Total polishing time since 18 Mar 2014 = 3 hours 20 minutes + 2 hours = 5 hours 20 minutes.
22:22 - Start of Dave Owen 20 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
22:42:00 - Stop. End of Dave Owen 20 minute polishing session. Total polishing time today = 20 minutes + 3 hours 20 minutes = 3 hours 40 minutes. Total polishing time since 18 Mar 2014 = 3 hours 40 minutes + 2 hours = 5 hours 40 minutes.
22:42:40 - Start of Geoff Regan 20 minute polishing session.
23:02:29 - Stop. End of Geoff Regan 20 minute polishing session. Total polishing time today = 20 minutes + 3 hours 40 minutes = 4 hours. Total polishing time since 18 Mar 2014 = 4 hours + 2 hours = 6 hours. Mirror sprayed with water, wiped with damp cloth and dried with kitchen roll.
23:13 - ROC = 96 inches, +/- 1 inch - measured with torch, white card and tape measure.
Pictures from this session, Tue 25 Mar 2014, can be accessed via my Wiki page:
Dave Owen Wiki Page
Direct link to these pictures is here:
https://plus.google.com/photos/113388810726069166553/albums/5995512828300197921
MON 31 MAR 2014 - Dave Thomson.
Dave Thomson did 3 hours polishing. Total polishing time since 18 Mar 2014 = 3 hours + 6 hours = 9 hours.
TUE 1 APR 2014 - Dave Thomson, Geoff Regan & Dave Owen.
18:30 - Arrived at Dave Thomson's with Geoff Regan.
19:14:45 - Geoff Regan started 20 minute polishing session.
19:19:30 - Stop - for hot dogs.
19:27:30 - Restart. Did 1 rotation - chordal strokes, 0 inches off-centre with 1 inch overhang.
19:32 - Stop. End of Geoff Regan 20 minute polishing session. Total polishing time today = 20 minutes . Total polishing time since 18 Mar 2014 = 20 minutes + 9 hours = 9 hours 20 minutes.
19:45 - Dave Owen started 20 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
20:05:23 - Stop. End of Dave Owen 20 minute polishing session. Total polishing time today = 20 + 20 = 40 minutes . Total polishing time since 18 Mar 2014 = 40 minutes + 9 hours = 9 hours 40 minutes.
20:07:30 - Geoff Regan started 20 minute polishing session.
20:26 - Stop. End of Geoff Regan 20 minute polishing session. Total polishing time today = 20 + 40 = 60 minutes . Total polishing time since 18 Mar 2014 = 60 minutes + 9 hours = 10 hours.
20:46 - Dave Owen started 20 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
20:46:30 - Stop. End of Dave Owen 20 minute polishing session. Total polishing time today = 20 + 60 minutes = 1 hour 20 minutes . Total polishing time since 18 Mar 2014 = 1 hour 20 minutes + 9 hours = 10 hours 20 minutes.
20:49:10 - Geoff Regan started 20 minute polishing session.
21:08 - Stop. End of Geoff Regan 20 minute polishing session. Total polishing time today = 20 minutes + 1 hour 20 minutes = 1 hour 40 minutes . Total polishing time since 18 Mar 2014 = 1 hour 40 minutes + 9 hours = 10 hours 40 minutes.
21:08 - Dave Owen started 20 minute polishing session - 50% chordal strokes, 4 inches off-centre with 1 inch overhang and 50% triple V W strokes with 1 inch overhang.
21:27:00 - Stop. End of Dave Owen 20 minute polishing session. Total polishing time today = 20 minutes + 1 hour 40 minutes = 2 hours . Total polishing time since 18 Mar 2014 = 2 hours + 9 hours = 11 hours. Mirror wiped with kitchen roll, sprayed with bottled water and dried with kitchen roll. May now be ready for figuring.
22:30 - Knife edge test shows smooth surface. Laser distance measure gives ROC = 2466mm.
23:00 - Image Profile generated with OpenFringe software:
140401-2300.jpg
140401-2300.jpg

Pictures from this session, Tue 1 Apr 2014, can be accessed via my Wiki page:
Dave Owen Wiki Page
Direct link to these pictures is here:
https://plus.google.com/photos/113388810726069166553/albums/6004408297528204209
TUE 8 APR 2014 - Dave Thomson, Geoff Regan & Dave Owen.
16:25 - Arrived at Dave Thomson's with Geoff Regan. 6 inch, 3 inch and 2 inch laps poured and then faceted. Wok with hot water used to soften laps.
17:30 - All 3 laps on 16 inch F3 mirror.
18:52 - Three inch lap micro-faceted. Two inch lap put away in plastic tub with 3 inch lap.
18:53 - 6 inch lap micro-faceted. Geoff Regan to do first figuring session with this 6 inch star lap.
18:59:10 - Geoff Regan started 10 minute figuring session with 6 inch star lap - chordal strokes, 0 inches off-centre with -3 inch overhang - attacking central hill.
19:02:40 - Geoff Regan switched to chordal strokes, 2 inches off-centre with -3 inch overhang.
19:09 - Stop. End of Geoff Regan 10 minute figuring session. Total figuring time today = 10 minutes.
19:10 - Dave Owen started 10 minute figuring session with 6 inch star lap - chordal strokes, 1 to 2 inches off-centre with -3 inch overhang.
19:20:00 - Stop. End of Dave Owen 10 minute figuring session. Total figuring time today = 10 + 10 minutes = 20 minutes.
19:20:12 - Dave Thomson started 10 minute figuring session with 6 inch star lap - chordal strokes, 1 to 2 inches off-centre with -3 inch overhang.
19:30:05 - Stop. End of Dave Thomson 10 minute figuring session. Total figuring time today = 10 + 20 minutes = 30 minutes. Will now use 3 inch lap on edge zone for 30 minutes.
19:31:30 - Geoff Regan started 10 minute figuring session on edge zone with 3 inch lap - Circular strokes with 1 inch overhang.
19:41 - Stop. End of Geoff Regan 10 minute figuring session. Total figuring time today = 10 + 30 minutes = 40 minutes.
19:41 - Dave Owen started 10 minute figuring session on edge zone with 3 inch lap - 50% curved strokes, following rim of mirror, with 1 inch overhang and 50% circular strokes with 1 inch overhang.
19:51 - Stop. End of Dave Owen 10 minute figuring session. Total figuring time today = 10 + 40 minutes = 50 minutes.
19:51:30 - Dave Thomson started 10 minute figuring session on edge zone with 3 inch lap.
20:04:16 - Stop. End of Dave Thomson 10 minute figuring session. Total figuring time today = 10 + 50 minutes = 60 minutes. Mirror wiped with damp cloth, sprayed with bottled water and dried with kitchen roll.
20:24 - Bath Interferometer and OpenFringe software used to produce 2D image profile:
140408-2024.jpg
140408-2024.jpg

20:32 - Mirror back on turntable. Will do 45 minutes with 6 inch lap on central zone.
20:33:10 - Geoff Regan started 15 minute figuring session on central zone with 6 inch star lap.
20:43 - Stop. End of Geoff Regan 15 minute figuring session. Total figuring time today = 15 + 60 minutes = 1 hour 15 minutes.
20:47 - Dave Owen started 15 minute figuring session on central zone with 6 inch star lap.
21:02:48 - Stop. End of Dave Owen 15 minute figuring session. Total figuring time today = 15 minutes + 1 hour 15 minutes = 1 hour 30 minutes.
21:03:00 - Dave Thomson started 15 minute figuring session on central zone with 6 inch star lap.
21:18:27 - Stop. End of Dave Thomson 15 minute figuring session. Total figuring time today = 15 minutes + 1 hour 30 minutes = 1 hour 45 minutes.
21:19:13 - Geoff Regan started 20 minute figuring session on edge zone with 3 inch lap.
21:39 - Stop. End of Geoff Regan 20 minute figuring session. Total figuring time today = 20 minutes + 1 hour 45 minutes = 2 hours 5 minutes.
21:42 - Start of Dave Owen 20 minute figuring session on edge zone with 3 inch lap - 50% curved strokes, following rim of mirror, with 1 inch overhang and 50% long oval strokes with 1 inch overhang.
22:02 - Stop. End of Dave Owen 20 minute figuring session. Total figuring time today = 20 minutes + 2 hours 5 minutes = 2 hours 25 minutes.
22:03:00 - Dave Thomson started 20 minute figuring session on edge zone with 3 inch lap.
22:23 - Stop. End of Dave Thomson 20 minute figuring session. Total figuring time today = 20 minutes + 2 hours 25 minutes = 2 hours 45 minutes. Mirror wiped with damp cloth, sprayed with bottled water and dried with kitchen roll.
22:26 - Mirror put on test stand for testing with Bath Interferometer.
22:34 - 2D image profile:
140408-2234.jpg
140408-2234.jpg

Pictures from this session, Tue 8 Apr 2014, can be accessed via my Wiki page:
Dave Owen Wiki Page
Direct link to these pictures is here:
https://plus.google.com/photos/113388810726069166553/albums/6004410444902047393
SAT 12 APR 2014 - Dave Thomson, Geoff Regan, Brendan Martin & Dave Owen
12:10 - Arrived at Dave Thomson's with Geoff Regan & Brendan Martin.
12:33 - Main facets recut in 6 inch lap.
13:06:45 - Geoff Regan started 15 minute figuring session with 6 inch lap on central zone.
13:21 - End of Geoff Regan 15 minute figuring session. Total figuring time today = 15 minutes. Total figuring time since 8 Apr 2014 = 15 minutes + 2 hours 45 minutes = 3 hours.
13:22 - Dave Owen started 15 minute figuring session with 6 inch lap on central zone.
13:37 - End of Dave Owen 15 minute figuring session. Total figuring time today = 15 + 15 = 30 minutes. Total figuring time since 8 Apr 2014 = 30 minutes + 2 hours 45 minutes = 3 hours 15 minutes.
13:38 - Brendan Martin started 15 minute figuring session with 6 inch lap on central zone.
13:53 - End of Brendan Martin 15 minute figuring session. Total figuring time today = 15 + 30 = 45 minutes. Total figuring time since 8 Apr 2014 = 45 minutes + 2 hours 45 minutes = 3 hours 30 minutes.
13:57:07 - Dave Thomson started 15 minute figuring session with 6 inch lap on central zone.
14:01:00 - Stop - for phone call.
14:03:10 - Resumed.
14:15 - Stop. End of Dave Thomson 15 minute figuring session. Total figuring time today = 15 + 45 = 60 minutes. Total figuring time since 8 Apr 2014 = 60 minutes + 2 hours 45 minutes = 3 hours 45 minutes.
14:17:30 - Geoff Regan started 15 minute figuring session with 3 inch lap on edge zone.
14:31 - Stop. End of Geoff Regan 15 minute figuring session. Total figuring time today = 15 minutes + 1 hour = 1 hour 15 minutes. Total figuring time since 8 Apr 2014 = 1 hour 15 minutes + 2 hours 45 minutes = 4 hours.
14:31 - Dave Owen started 15 minute figuring session with 3 inch lap on edge zone.
14:46:40 - Stop. End of Dave Owen 15 minute figuring session. Total figuring time today = 15 minutes + 1 hour 15 minutes = 1 hour 30 minutes. Total figuring time since 8 Apr 2014 = 1 hour 30 minutes + 2 hours 45 minutes = 4 hours 15 minutes.
14:47 - Brendan Martin started 15 minute figuring session with 3 inch lap on edge zone.
15:01:50 - Stop. End of Brendan Martin 15 minute figuring session. Total figuring time today = 15 minutes + 1 hour 30 minutes = 1 hour 45 minutes. Total figuring time since 8 Apr 2014 = 1 hour 45 minutes + 2 hours 45 minutes = 4 hours 30 minutes.
15:03:30 - Dave Thomson started 15 minute figuring session with 3 inch lap on edge zone.
15:18 - Stop. End of Dave Thomson 15 minute figuring session. Total figuring time today = 15 minutes + 1 hour 45 minutes = 2 hours. Total figuring time since 8 Apr 2014 = 2 hours + 2 hours 45 minutes = 4 hours 45 minutes.
15:26 - Mirror alignment adjusted - for testing with Bath Interferometer.
15:37 - Pictures taken - for analysis with OpenFringe software.
15:42 - More pictures taken.
15:45 - Mirror put back on turntable.
15:49:04 - Geoff Regan started 15 minute figuring session with 3 inch lap on edge zone.
16:04 - Stop. End of Geoff Regan 15 minute figuring session. Total figuring time today = 15 minutes + 2 hours = 2 hours 15 minutes. Total figuring time since 8 Apr 2014 = 2 hours 15 minutes + 2 hours 45 minutes = 5 hours.
16:06 - Start of Dave Owen 15 minute figuring session with 3 inch lap on edge zone.
16:21:30 - Stop. End of Dave Owen 15 minute figuring session. Total figuring time today = 15 minutes + 2 hours 15 minutes = 2 hours 30 minutes. Total figuring time since 8 Apr 2014 = 2 hours 30 minutes + 2 hours 45 minutes = 5 hours 15 minutes.
16:22:15 - Brendan Martin started 15 minute figuring session with 3 inch lap on edge zone.
16:37 - Stop. End of Brendan Martin 15 minute figuring session. Total figuring time today = 15 minutes + 2 hours 30 minutes = 2 hours 45 minutes. Total figuring time since 8 Apr 2014 = 2 hours 45 minutes + 2 hours 45 minutes = 5 hours 30 minutes.
16:37:50 - Dave Thomson started 15 minute figuring session with 3 inch lap on edge zone.
16:52:35 - Stop. End of Dave Thomson 15 minute figuring session. Total figuring time today = 15 minutes + 2 hours 45 minutes = 3 hours. Total figuring time since 8 Apr 2014 = 3 hours + 2 hours 45 minutes = 5 hours 45 minutes.
16:54:18 - Geoff Regan started 10 minute figuring session with 6 inch lap on central zone.
17:06:02 - Stop. End of Geoff Regan 10 minute figuring session. Total figuring time today = 10 minutes + 3 hours = 3 hours 10 minutes. Total figuring time since 8 Apr 2014 = 3 hours 10 minutes + 2 hours 45 minutes = 5 hours 55 minutes.
17:09 - Dave Owen started 10 minute figuring session with 6 inch lap on central zone.
17:19:00 - Stop. End of Dave Owen 10 minute figuring session. Total figuring time today = 10 minutes + 3 hours 10 minutes = 3 hours 20 minutes. Total figuring time since 8 Apr 2014 = 3 hours 20 minutes + 2 hours 45 minutes = 6 hours 5 minutes.
17:19:15 - Brendan Martin started 10 minute figuring session with 6 inch lap on central zone.
17:30:00 - Stop. End of Brendan Martin 10 minute figuring session. Total figuring time today = 10 minutes + 3 hours 20 minutes = 3 hours 30 minutes. Total figuring time since 8 Apr 2014 = 3 hours 30 minutes + 2 hours 45 minutes = 6 hours 15 minutes. Mirror wiped with damp cloth, sprayed with bottled water and dried with kitchen roll.
17:33 - Mirror put back on test stand. P-V is now about 1000 nm.
17:43 - Mirror put back on turntable. Will try 2 inch lap on narrow edge zone. 6 inch lap cut to more aggressive star pattern.
17:56:05 - Brendan Martin started 10 minute figuring session with 6 inch lap on central zone.
18:05:30 - Stop. End of Brendan Martin 10 minute figuring session. Total figuring time today = 10 minutes + 3 hours 30 minutes = 3 hours 40 minutes. Total figuring time since 8 Apr 2014 = 3 hours 40 minutes + 2 hours 45 minutes = 6 hours 25 minutes.
18:06:30 - Geoff Regan started 10 minute figuring session with 6 inch lap on central zone.
18:16 - Stop. End of Geoff Regan 10 minute figuring session. Total figuring time today = 10 minutes + 3 hours 40 minutes = 3 hours 50 minutes. Total figuring time since 8 Apr 2014 = 3 hours 50 minutes + 2 hours 45 minutes = 6 hours 35 minutes.
18:16 - Dave Owen started 10 minute figuring session with 2 inch lap on edge zone.
18:26 - Stop. End of Dave Owen 10 minute figuring session. Total figuring time today = 10 minutes + 3 hours 50 minutes = 4 hours. Total figuring time since 8 Apr 2014 = 4 hours + 2 hours 45 minutes = 6 hours 45 minutes.
18:26 - Dave Thomson started 10 minute figuring session with 2 inch lap on edge zone.
18:36 - Stop. End of Dave Thomson 10 minute figuring session. Total figuring time today = 10 minutes + 4 hours = 4 hours 10 minutes. Total figuring time since 8 Apr 2014 = 4 hours 10 minutes + 2 hours 45 minutes = 6 hours 55 minutes. Mirror P-V now down to about 750nm.
Pictures from this session, Sat 12 Apr 2014, can be accessed via my Wiki page:
Dave Owen Wiki Page
Direct link to these pictures is here:
https://plus.google.com/photos/113388810726069166553/albums/6004413659880038001
SUN 13 APR 2014 - Dave Thomson.
Dave Thomson did two figuring sessions:
I - 10 minutes with 6 inch lap on central zone and 20 minutes with 2 inch lap on edge zone;
II - 10 minutes with 6 inch lap on central zone and 20 minutes with 2 inch lap on edge zone.
Total figuring time today = 1 hour + 4 hours 10 minutes = 5 hours 10 minutes. Total figuring time since 8 Apr 2014 = 5 hours 10 minutes + 2 hours 45 minutes = 7 hours 55 minutes. Mirror P-V now down to about 750nm.
Two image profiles taken on Sun 13 Apr 2014 are shown below:
Sun 13 Apr 2014 11:38
140413-1138.jpg
140413-1138.jpg

Sun 13 Apr 2014 12:49
140413-1249.jpg
140413-1249.jpg

Tue 15 Apr 2014 - Dave Thomson, Geoff Regan, Brendan Martin & Dave Owen.
18:10 - Arrived at Dave Thomson's with Geoff Regan & Brendan Martin.
18:30 - Brendan Martin started 10 rotations on 50% zone with 3 inch lap - 1 rotation = about 90 seconds.
18:32:44 - 2 rotations. 18:34:12 - 3 rotations. 18:35 - Temperature 20.6 degrees inside and 27.1 degrees outside. 18:35:38 - 4 rotations. 18:37:05 - 5 rotations. 18:38:30 - 6 rotations. 18:40:00 - 7 rotations. 18:41:30 - 8 rotations. 18:43:00 - 9 rotations. 18:44:30 - 10 rotations. Stop. Total figuring time today = 15 minutes. Total figuring time since 8 Apr 2014 = 15 minutes + 7 hours 55 minutes = 8 hours 10 minutes.
18:45 - Dave Owen started 10 rotations on 50% zone with 3 inch lap.
19:00:30 - Stop. End of Dave Owen 15 minute figuring session. Total figuring time today = 15 + 15 = 30 minutes. Total figuring time since 8 Apr 2014 = 30 minutes + 7 hours 55 minutes = 8 hours 25 minutes.
19:02:05 - Geoff Regan started 9 rotations on edge zone with 2 inch lap.
19:03:32 - 1 rotation. 19:04:55 - 2 rotations. 19:06:20 - 3 rotations. 19:07:55 - 4 rotations. 19:09:20 - 5 rotations. 19:10:50 - 6 rotations. 19:12:12 - 7 rotations. 19:13:45 - 8 rotations. 19:15:24 - 9 rotations. Stop. End of Geoff Regan 14 minute figuring session. Total figuring time today = 14 + 30 = 44 minutes. Total figuring time since 8 Apr 2014 = 44 minutes + 7 hours 55 minutes = 8 hours 39 minutes.
19:16:30 - Dave Thomson started 10 rotations on edge zone with 2 inch lap.
19:17:57 - 1 rotation. 19:19:26 - 2 rotations. 19:20:57 - 3 rotation. 19:22:26 - 4 rotations. 19:23:46 - 5 rotations. 19:25:18 - 6 rotations. 19:26:48 - 7 rotations. 19:28:18 - 8 rotations. 19:29:48 - 9 rotations. 19:31:25 - 10 rotations = 15 minutes. Total figuring time today = 15 + 44 = 59 minutes. Total figuring time since 8 Apr 2014 = 59 minutes + 7 hours 55 minutes = 8 hours 54 minutes.
19:31:40 - Brendan Martin started 10 rotations on edge zone with 2 inch lap.
19:33:04 - 1 rotation. 19:34:15 - 2 rotations. 19:36:00 - 3 rotations. 19:37:25 - 4 rotations. 19:38:54 - 5 rotations. 19:40:30 - 6 rotations. 19:41:55 - 7 rotations. 19:43:20 - 8 rotations. 19:44:50 - 9 rotations. 19:46:30 - 10 rotations = 15 minutes. Total figuring time today = 15 + 59 = 1 hour 14 minutes. Total figuring time since 8 Apr 2014 = 1 hour 14 minutes + 7 hours 55 minutes = 9 hours 9 minutes.
19:52 - 2D image produced by OpenFringe software:
140415-1952.jpg
140415-1952.jpg
Will try 30 rotations on 50% zone with 3 inch lap and 20 rotations on edge zone with 2 inch lap.
20:08 - Mirror back on turntable.
20:11:15 - Dave Owen started 10 rotations on 50% zone with 3 inch lap.
20:26:15 - Stop. End of Dave Owen 15 minute figuring session. Total figuring time today = 15 + 1 hour 14 minutes = 1 hour 29 minutes. Total figuring time since 8 Apr 2014 = 1 hour 29 minutes + 7 hours 55 minutes = 9 hours 24 minutes.
20:27:02 - Geoff Regan started 10 rotations on 50% zone with 3 inch lap. 20:28:48 - 1 rotation. 20:30:17 - 2 rotations. 20:31:55 - 3 rotations. 20:33:20 - 4 rotations. 20:34:43 - 5 rotations. 20:36:15 - 6 rotations. 20:37:40 - 7 rotations. 20:39:12 - 8 rotations. 20:40:35 - 9 rotations. 20:42:12 - 10 rotations. Total figuring time today = 15 + 1 hour 29 minutes = 1 hour 44 minutes. Total figuring time since 8 Apr 2014 = 1 hour 44 minutes + 7 hours 55 minutes = 9 hours 39 minutes.
20:42:25 - Brendan Martin started 10 rotations on 50% zone with 3 inch lap. 20:43:40 - 1 rotation. 20:45:08 - 2 rotations. 20:46:35 - 3 rotations. 20:48:04 - 4 rotations. 20:49:35 - 5 rotations. 20:51:05 - 6 rotations. 20:52:30 - 7 rotations. 20:54:02 - 8 rotations. 20:55:28 - 9 rotations. 20:56:50 - 10 rotations. Total figuring time today = 15 + 1 hour 44 minutes = 1 hour 59 minutes. Total figuring time since 8 Apr 2014 = 1 hour 59 minutes + 7 hours 55 minutes = 9 hours 54 minutes.
20:57:17 - Dave Thomson started 10 rotations on edge zone with 2 inch lap. 20:58:47 - 1 rotation. 21:00:18 - 2 rotations. 21:01:44 - 3 rotations. 21:03:17 - 4 rotations. 21:04:45 - 5 rotations. 21:06:10 - 6 rotations. 21:07:40 - 7 rotations. 21:09:10 - 8 rotations. 21:10:40 - 9 rotations. 21:12:10 - 10 rotations. Total figuring time today = 15 + 1 hour 59 minutes = 2 hours 14 minutes. Total figuring time since 8 Apr 2014 = 2 hours 14 minutes + 7 hours 55 minutes = 10 hours 9 minutes.
21:13:15 - Dave Owen started 10 rotations on edge zone with 2 inch lap.
21:28:15 - Stop. End of Dave Owen 15 minute figuring session. Total figuring time today = 15 + 2 hours 14 minutes = 2 hours 29 minutes. Total figuring time since 8 Apr 2014 = 2 hours 29 minutes + 7 hours 55 minutes = 10 hours 24 minutes.
21:29:45 - Geoff Regan started 10 rotations on edge zone with 2 inch lap. 21:31:08 - 1 rotation. 21:32:42 - 2 rotations. 21:34:08 - 3 rotations. 21:35:37 - 4 rotations. 21:37:06 - 5 rotations. 21:38:32 - 6 rotations. 21:40:05 - 7 rotations. 21:41:37 - 8 rotations. 21:43:00 - 9 rotations. 21:44:40 - 10 rotations. Total figuring time today = 15 + 2 hours 29 minutes = 2 hours 44 minutes. Total figuring time since 8 Apr 2014 = 2 hours 44 minutes + 7 hours 55 minutes = 10 hours 39 minutes. Mirror cleaned for testing with Bath Interferometer.
21:59 - 2D image produced by OpenFringe software:
140415-2159.jpg
140415-2159.jpg

22:04 - Mirror back on turntable.
22:06:08 - Brendan Martin started 10 rotations on 50% zone with 3 inch lap. 22:19:30 - Stop. End of Brendan Martin 14 minute figuring session. Total figuring time today = 14 + 2 hours 44 minutes = 2 hours 58 minutes. Total figuring time since 8 Apr 2014 = 2 hours 58 minutes + 7 hours 55 minutes = 10 hours 53 minutes.
22:20:12 - Geoff Regan started 10 rotations on 50% zone with 3 inch lap. 22:21:45 - 1 rotation. 22:23:08 - 2 rotations. 22:24:42 - 3 rotations. 22:26:12 - 4 rotations. 22:27:45 - 5 rotations. 22:29:08 - 6 rotations. 22:30:30 - 7 rotations. 22:32:02 - 8 rotations. 22:33:27 - 9 rotations. 22:35:00 - 10 rotations. Total figuring time today = 15 + 2 hours 58 minutes = 3 hours 13 minutes. Total figuring time since 8 Apr 2014 = 3 hours 13 minutes + 7 hours 55 minutes = 11 hours 8 minutes.
22:36:27 - Dave Thomson started 10 rotations on edge zone with 2 inch lap. 22:38:00 - 1 rotation. 22:39:30 - 2 rotations. 22:41:00 - 3 rotations. 22:42:25 - 4 rotations. 22:43:54 - 5 rotations. 22:45:25 - 6 rotations. 22:46:52 - 7 rotations. 22:48:24 - 8 rotations. 22:50:16 - 9 rotations. 22:51:48 - 10 rotations. Total figuring time today = 15 + 3 hours 13 minutes = 3 hours 28 minutes. Total figuring time since 8 Apr 2014 = 3 hours 28 minutes + 7 hours 55 minutes = 11 hours 23 minutes.
22:51 - Dave Owen started 10 rotations on edge zone with 2 inch lap. 23:06 - Stop. End of Dave Owen 15 minute figuring session. Total figuring time today = 15 + 3 hours 28 minutes = 3 hours 43 minutes. Total figuring time since 8 Apr 2014 = 3 hours 43 minutes + 7 hours 55 minutes = 11 hours 38 minutes.
23:24 - 2D image produced by OpenFringe software:
140415-2324.jpg
140415-2324.jpg
Pictures from this session, Tue 15 Apr 2014, can be accessed via my Wiki page:
Dave Owen Wiki Page
Direct link to these pictures is here:
Photos Tue 15 Apr 2014
FRI 18 APR 2014 - Dave Thomson
Dave Thomson did 4 figuring sessions:
6 inch lap used for 20 minutes on central zone. Total figuring time today = 20 minutes. Total figuring time since 8 Apr 2014 = 20 minutes + 11 hours 38 minutes = 11 hours 58 minutes. 3 inch lap used for 20 minutes on edge zone. Total figuring time today = 20 + 20 = 40 minutes. Total figuring time since 8 Apr 2014 = 40 minutes + 11 hours 38 minutes = 12 hours 18 minutes.
3 inch lap used for 7 rotations on central zone. Total figuring time today = 10 + 40 = 50 minutes. Total figuring time since 8 Apr 2014 = 50 minutes + 11 hours 38 minutes = 12 hours 28 minutes. 3 inch lap used for 6 rotations on edge zone. Total figuring time today = 9 + 50 = 59 minutes. Total figuring time since 8 Apr 2014 = 59 minutes + 11 hours 38 minutes = 12 hours 37 minutes.
3 inch lap used for 6 rotations on central zone. Total figuring time today = 9 + 59 = 1 hour 8 minutes. Total figuring time since 8 Apr 2014 = 1 hour 8 minutes + 11 hours 38 minutes = 12 hours 46 minutes. 3 inch lap used for 6 rotations on edge zone. Total figuring time today = 9 + 1 hour 8 minutes = 1 hour 17minutes. Total figuring time since 8 Apr 2014 = 1 hour 17 minutes + 11 hours 38 minutes = 12 hours 55 minutes.
3 inch lap used for 6 rotations on 50% zone. Total figuring time today = 9 + 1 hour 17 minutes = 1 hour 26 minutes. Total figuring time since 8 Apr 2014 = 1 hour 26 minutes + 11 hours 38 minutes = 13 hours 4 minutes. 3 inch lap used for 2 rotations on 30% zone. Total figuring time today = 3 + 1 hour 26 minutes = 1 hour 29 minutes. Total figuring time since 8 Apr 2014 = 1 hour 29 minutes + 11 hours 38 minutes = 13 hours 7 minutes. Strehl is now about 0.23. Conic = -0.989. P-V = 0.6 waves.
TUE 22 APR 2014 - Dave Thomson, Geoff Regan, Brendan Martin & Dave Owen.
18:50 - Arrived at Dave Thomson's with Geoff Regan & Brendan Martin.
19:22 - 3 inch and 2 inch laps on mirror. Will try 2 rotations with 3 inch lap on inner zone; 6 rotations with 3 inch lap on intermediate zone and 6 rotations with 2 inch lap on edge zone.
19:30:25 - Brendan Martin started 2 rotations with 2 inch lap on edge zone. 19:31:58 - 1 rotation. 19:33:25 - 2 rotations. Total figuring time today = 3 minutes. Total figuring time since 8 Apr 2014 = 3 minutes + 13 hours 7 minutes = 13 hours 10 minutes.
19:33:30 - Brendan Martin started 3 rotations with 3 inch lap on intermediate zone - chordal strokes +/- 2 to 3 inches. 19:34:52 - 1 rotation. 19:36:22 - 2 rotations. 19:37:50 - 3 rotations. Total figuring time today = 5 + 3 minutes = 8 minutes. Total figuring time since 8 Apr 2014 = 8 minutes + 13 hours 7 minutes = 13 hours 15 minutes.
19:37:52 - Brendan Martin started 3 rotations with 3 inch lap on inner zone - chordal strokes +/- 1 to 2 inches. 19:39:20 - 1 rotation. 19:40:48 - 2 rotations. 19:42:20 - 3 rotations. Total figuring time today = 5 + 8 minutes = 13 minutes. Total figuring time since 8 Apr 2014 = 13 minutes + 13 hours 7 minutes = 13 hours 20 minutes.
19:43:20 - Geoff Regan started 3 rotations with 3 inch lap on intermediate zone - chordal strokes +/- 2 to 3 inches. 19:44:48 - 1 rotation. 19:46:12 - 2 rotations. 19:47:44 - 3 rotations. Total figuring time today = 4 + 13 minutes = 17 minutes. Total figuring time since 8 Apr 2014 = 17 minutes + 13 hours 7 minutes = 13 hours 24 minutes.
19:47:57 - Geoff Regan started 2 rotations with 2 inch lap on edge zone - chordal strokes +/- 2 inches. 19:49:23 - 1 rotation. 19:50:55 - 2 rotations. Total figuring time today = 3 + 17 minutes = 20 minutes. Total figuring time since 8 Apr 2014 = 20 minutes + 13 hours 7 minutes = 13 hours 27 minutes.
19:59 - Dave Owen finished 3 rotations with 3 inch lap on intermediate zone & 2 rotations with 2 inch lap on edge zone. Total figuring time today = 8 + 20 minutes = 28 minutes. Total figuring time since 8 Apr 2014 = 28 minutes + 13 hours 7 minutes = 13 hours 35 minutes.
19:59:50 - Dave Thomson started 2 rotations on edge zone with 2 inch lap - chordal strokes +/- 3 to 4 inches. 20:01:24 - 1 rotation. 20:02:54 - 2 rotations. Total figuring time today = 3 + 28 minutes = 31 minutes. Total figuring time since 8 Apr 2014 = 31 minutes + 13 hours 7 minutes = 13 hours 38 minutes. Mirror cleaned, ready for testing. Now, not sure if mirror has slight astigmatism. Will try 6 rotations with 3 inch lap on 60% zone and 8 rotations with 2 inch lap on edge zone.
22:33:02 - Brendan Martin started 3 rotations on 60% zone with 3 inch lap - chordal strokes +/- 2 inches. 22:34:32 - 1 rotation. 22:36:00 - 2 rotations. 22:37:30 - 3 rotations. Total figuring time today = 5 + 31 minutes = 36 minutes. Total figuring time since 8 Apr 2014 = 36 minutes + 13 hours 7 minutes = 13 hours 43 minutes.
22:37:45 - Brendan Martin started 2 rotations with 2 inch lap on edge zone - chordal strokes +/- 2 inches. 22:39:17 - 1 rotation. 22:40:44 - 2 rotations. Total figuring time today = 3 + 36 minutes = 39 minutes. Total figuring time since 8 Apr 2014 = 39 minutes + 13 hours 7 minutes = 13 hours 46 minutes.
22:41:28 - Geoff Regan started 3 rotations with 3 inch lap on 60% zone - chordal strokes +/- 2 inches. 22:42:58 - 1 rotation. 22:44:25 - 2 rotations. 22:45:55 - 3 rotations. Total figuring time today = 4 + 39 minutes = 43 minutes. Total figuring time since 8 Apr 2014 = 43 minutes + 13 hours 7 minutes = 13 hours 50 minutes.
22:46:16 - Geoff Regan started 2 rotations with 2 inch lap on edge zone - chordal strokes +/- 2 inches. 22:47:50 - 1 rotation. 22:49:18 - 2 rotations. Total figuring time today = 3 + 43 minutes = 46 minutes. Total figuring time since 8 Apr 2014 = 46 minutes + 13 hours 7 minutes = 13 hours 53 minutes.
22:53:20 - Dave Owen finished 2 rotations with 2 inch lap on edge zone - chordal strokes +/- 1 to 1.5 inches. Total figuring time today = 3 + 46 minutes = 49 minutes. Total figuring time since 8 Apr 2014 = 49 minutes + 13 hours 7 minutes = 13 hours 56 minutes.
22:53:30 - Dave Thomson started 2 rotations with 2 inch lap on edge zone - chordal strokes +/- 3 to 4 inches. 22:55:00 - 1 rotation. 22:56:28 - 2 rotations. Total figuring time today = 3 + 49 minutes = 52 minutes. Total figuring time since 8 Apr 2014 = 52 minutes + 13 hours 7 minutes = 13 hours 59 minutes.
22:59 - Mirror back on test stand, ready for testing.
Pictures from this session, Tue 22 Apr 2014, can be accessed via my Wiki page:
Dave Owen Wiki Page
Direct link to these pictures is here:
https://plus.google.com/photos/113388810726069166553/albums/6007019769581537041
SAT 21 JUN 2014 11:22:36 - 3D Image Profile after Dave Thomson did 3 rotations on outer zone with 3 inch lap and 3 rotations on outer zone with 2 inch lap; followed by 2 rotations on middle zone and 1 rotation on inner zone.
2014-06-21 11.22.36.jpg
2014-06-21 11.22.36.jpg