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40m Log |
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Fri Sep 16 19:48:52 2016, Lydia, Update, General, Alignment status
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Sat Sep 17 02:00:23 2016, rana, Update, SUS, Alignment status
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Sat Sep 17 16:51:01 2016, Lydia, Update, SUS, Alignment status
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Sun Sep 18 16:18:05 2016, rana, Update, SUS, Alignment status
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Mon Sep 19 11:11:43 2016, ericq, Update, SUS, Alignment status
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Mon Sep 19 22:03:10 2016, ericq, Update, General, Further recovery progress
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Tue Sep 20 10:45:06 2016, rana, Update, General, Further recovery progress
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Wed Sep 21 01:08:02 2016, ericq, Update, General, Further recovery progress
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Wed Sep 21 09:04:57 2016, Steve, Update, General, 8 hours recovery progress
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Thu Sep 22 15:44:21 2016, Steve, Update, General, ITMX magnets are stucked again
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Thu Sep 22 20:01:47 2016, Lydia, Update, General, ITMX freed, all optics kicked
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Thu Sep 22 22:52:08 2016, ericq, Update, General, Damping found to be on
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Message ID: 12504
Entry time: Mon Sep 19 11:11:43 2016
In reply to: 12503
Reply to this: 12507
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Author: |
ericq |
Type: |
Update |
Category: |
SUS |
Subject: |
Alignment status |
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[ericq, Steve]
ITMX is free, OSEM signals all rougly centered.
This was accomplished by rocking the static alignment (i.e. slow controls) pitch and yaw offsets until the optic broke free. This took a few volts back and forth. At this point, I tried to find a point where the optic seemed to freely swing, and hopefully have signals in all 5 OSEMS. It seemed to be free sometimes but mostly settling into two different stationary states. I realized that it was becoming torqued enough in pitch to be leaning on the top-front or top-back EQ stops. So, I slowly adjusted the pitch from one of these states until it seemed to be swinging a bit on the camera, and three OSEM signals were showing real motion. Then, I slowly adjusted the pitch and yaw alignments to get all OSEMS signals roughly centered at half of their max voltage. |