Table+of+work+completed+for+polishing

19:50:17 - Stop. Loose wing nut. 19:50:40 - Srart. 39.5 hz. Judder in return stroke. This died away during the course of the next 20 to 30 minutes, as the lap picked up a bit of heat and bedded in better. 19:54:05 - Machine speed increased to 50 hz, to put more heat into lap and speed up bedding in process. Judder reduced after speed increased. 19:54:40 - Lew Brown here. 20:07:48 - Stop, to spin mirror about 30 degrees.
 * **__Polishing work done__** || __**Work**__ **__time__** || **__Total time__** || __**Total knife edge movement, center to edge**__ || __**Date**__ ||
 * Polishing 16 inch lap. Table speed fixed at approx 0.9 rpm. Overarm at 26Hz on the variable spped drive toensure overlap at the end of the stroke. || 45 mins || 45 mins ||  || 08/04/08 ||
 * Polishing 16 inch lap (see image TRO_30inch_polishing_1_135mins below) || 90 mins || 135 mins || -46mm || 08/04/08 ||
 * Polishing 10 inch star lap (8 inch usefularea) to reduce high centre -46mm to -12mm (see image TRO_30inch_polishing_2_225mins below) || 90 mins || 225 mins || -12mm || 13/04/08 ||
 * Polishing 16 inch lap just off centre with 1.5 inch overhang || 90 mins || 315 mins ||  || 14/04/08 ||
 * Polishing 16 inch lap just off centre with 1.5 inch overhang (see image TRO_30inch_polishing_3_440mins below) || 125 mins || 440 mins ||  || 15/04/08 ||
 * Polishing 16 inch lap 5 inches off centre with 2 inch overhang to try and polish edge and prevent rolling it down (see image TRO_30inch_polishing_4_502mins_b below) || 62 mins || 502 mins ||  || 15/04/08 ||
 * Polishing 16 inch lap 5 inches off center as above with 3 inch over hang || 60 mins || 562 mins ||  || 17/04/08 ||
 * Polishing 16 inch lap center over center with 3 inch over hang (see image TRO_30inch_polishing_5_622mins_b below) || 60 mins || 622 mins ||  || 17/04/08 ||
 * Polishing 16 inch lap 3 inch off center with 3 inch over hang || 165 mins || 787 mins ||  || 19/04/08 ||
 * Polishing 16 inch lap center over center with 2 inch over hang || 105 mins || 892 mins ||  || 19/04/08 ||
 * Polishing 16 inch lap 5 inch off center with 3 inch over hang || 90 mins || 982 mins ||  || 19/04/08 ||
 * Polishing 16 inch lap center over center with 2 inch over hang || 35 mins || 1017mins ||  || 19/04/08 ||
 * Polishing 16 inch lap center over center || 30 mins || 1047 mins ||  || 20/04/08 ||
 * Polishing 16 inch lap 4 inch off center, 4 inch over hang || 120 mins || 1167 mins ||  || 20/04/08 ||
 * Polishing 16 inch lap center over center 3 inch over hang || 30 mins || 1197 mins ||  || 20/04/08 ||
 * Polishing 16 inch lap 5 inch off center 4 inch over hang || 45 mins || 1242 mins ||  || 20/04/08 ||
 * Polishing 16 inch lap center over center 2 inch over hang. See image TRO_30inch_polishing_6_1262mins_b.jpg || 20 mins || 1262 mins ||  || 20/04/08 ||
 * Polishing 16 inch lap 3 inch off center, 3 inch over hang || 60 mins || 1322 mins ||  || 21/04/08 ||
 * Polishing 16 inch lap center over center 3 inch over hang || 45 mins || 1367 mins ||  || 21/04/08 ||
 * Polishing 16 inch lap 3 inch off center, 3 inch over hang || 45 mins || 1412 mins ||  || 21/04/08 ||
 * Polishing 16 inch lap center over center 3 inch over hang. See image TRO_30inch_polishing_7_1442mins_a.jpg || 30 mins || 1442 mins ||  || 21/04/08 ||
 * Polishing lap 16 inch 9 inch off center to right large overhang || 15 mins || 1457 mins ||  || 24/04/08 ||
 * Polishing lap 16 inch 7 inch off center to right small 1 inch overhang || 30 mins || 1487 mins ||  || 24/04/08 ||
 * Polishing lap 16 inch 4 inch off center to left as normal || 45 mins || 1532 mins ||  || 24/04/08 ||
 * Polishing lap 16 inch 3 inch off center to left || 30 mins || 1562 mins ||  || 24/04/08 ||
 * Polishing lap 16 inch 9 inch off center to right large overhang || 15 mins || 1577 mins ||  || 24/04/08 ||
 * Polishing lap 16 inch 4 inch off center to left as normal || 30 mins || 1607 mins ||  || 24/04/08 ||
 * Polishing lap 16 inch center over center. See image TRO_30inch_polishing_8_1637mins_a.jpg || 30 mins || 1637 mins ||  || 24/04/08 ||
 * Polishing 16 inch lap 3 inch off center, 2 inch over hang || 45 mins || 1682 mins ||  || 28/04/08 ||
 * Polishing 16 inch lap off to right hand side with 3 inch overhang || 30 mins || 1712 mins ||  || 28/04/08 ||
 * Polishing 16 inch lap center over center 3 inch over hang || 45 mins || 1757 mins ||  || 28/04/08 ||
 * Polishing 16 inch lap 3 inch off center, 3 inch over hang || 45 mins || 1802 mins ||  || 28/04/08 ||
 * Polishing 16 inch lap cnter over center, 3 inch over hang. See images TRO_30inch_polishing_9_1817mins_a.jpg, TRO_30inch_polishing_9_1817mins_b, TRO_30inch_polishing_9_1817mins_d.jpg.jpg || 15 mins || 1817 mins ||  || 28/04/08 ||
 * Polishing 16 inch lap 8 inch off center to the left || 60 mins || 1877 mins ||  || 29/04/08 ||
 * Polishing 16 inch lap center over center || 35 mins || 1912 mins ||  || 29/04/08 ||
 * Polishing 16 inch lap 8 inch off center to the left || 60 mins || 1972 mins ||  || 29/04/08 ||
 * Polishing 16 inch lap center over center || 30 mins || 2002 mins ||  || 29/04/08 ||
 * Polishing 16 inch lap 8 inches off center to the left || 15 mins || 2017 mins ||  || 29/04/08 ||
 * Polishing 16 inch lap 5 inches off center to the left || 15 mins || 2032 mins ||  || 29/04/08 ||
 * Polishing 16 inch lap center over center. See images TRO_30inch_polishing_10_2047mins_a.jpg, TRO_30inch_polishing_10_2047mins_b || 15 mins || 2047 mins ||  || 29/04/08 ||
 * Polishing 16 inch lap 8 inch off center to the left || 120 mins || 2167 mins ||  || 30/04/08 ||
 * Polishing 16 inch lap center over center || 60 mins || 2227 mins ||  || 30/04/08 ||
 * Polishing 16 inch lap 8 inch and 7 inch off center to the left || 80 mins || 2307 mins ||  || 30/04/08 ||
 * Polishing 16 inch lap center over center. See image TRO_30inch_polishing_11_2347mins_b.jpg || 40 mins || 2347 mins ||  || 30/04/08 ||
 * Polishing 16 inch lap 8 inch off center to the left || 60 mins || 2407 mins ||  || 17/05/08 ||
 * Polishing 16 inch lap center over center || 120 mins || 2527 mins ||  || 17/05/08 ||
 * Polishing 16 inch lap 7 inches off center to the left. See TRO_30inch_polishing_12_2567mins_a.jpg || 40 mins || 2567 mins ||  || 17/05/08 ||
 * 19:48:28 - 29.8 hz. Off centre stroke, 8 inches left of mirror centre. Mirror reluctant to spin unaided, so spun clockwise, by hand, about 10 degrees, on every return stroke. This is same direction that motor turns the mirror table.

20:10 - Start of second 20 minute polishing session. No change in arm position, still 8 inches left of mirror centre. Stroke length also remained the same. 20:30 - Stop. Mirror spun about 30 degrees.

20:42 - Start of third polishing session. Still 8 inches left of mirror centre. 50 hz. 21:02 - Stop. Mirror spun about 30 degrees. || 59 mins || 2626 mins ||  || 20/05/08 || 21:31 - Stop. Mirror spun about 30 degrees.
 * 21:10 - Start of 4th polishing session. Arm moved to 4 inches left of mirror centre. Speed reduced to 30 hz. Still turning mirror clockwise about 10 degrees at the end of each return stroke, although this is now getting a lot easier to do than at the start of tonight's session.

21:38:07 - Start. Stroke lengthened. 21:58 - Stop. Mirror spun about 30 degrees || 41 mins || 2667 mins ||  || 20/05/08 || 22:21:24 - Stop. Arm is crushing wooden top of lap, producing wood dust that is falling onto top of wooden lap surface. 22:26:02 Start. Temperature in garage is about 19 degrees centigrade, fairly warm. 22:34 Stop. Mirror spun about 30 degrees.
 * 22:06:10 - Start. Arm now polishing through centre of mirror. No left/right offset.

22:41 - Start. Continued centre work. 23:01 - Stop. 20 + 121 = 141 minutes polishing tonight. Mirror examined with laser pen. Very little sign of extra polishing on outer 1 to 2 inches of mirror rim. Therefore, decision taken to start figuring work.

Mirror examined with Rhonchi and Foucault. Very smooth surface. Centre has not swelled up, may have actually gone a bit lower. The mirror is now suitably polished to allow figuring to begin. Over 45 hours of polishing was required. || 41 mins || 2708 mins ||  || 20/05/08 ||