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 Mon May 6 19:04:30 2013, Jamie, Update, IOO, mode cleaner not locking
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 Mon May 6 21:05:06 2013, rana, Jamie, KOji, Update, IOO, mode cleaner not locking
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Fri Sep 20 20:27:18 2013, rana, Update, IOO, mode cleaner not locking
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Sun Sep 22 22:54:28 2013, rana, Update, IOO, mode cleaner not locking
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Sat Nov 30 23:50:28 2013, rana, Update, IOO, mode cleaner not locking 
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Message ID: 9431
Entry time: Sat Nov 30 23:50:28 2013
In reply to: 9148
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| Author: |
rana |
| Type: |
Update |
| Category: |
IOO |
| Subject: |
mode cleaner not locking |
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| Quote: |
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I used our procedure from this entry to set the IMC board offset as well as the FSS board offset.
I found this afternoon that the MC was having trouble locking: the PC path was railing as soon as the boost was engaged. Could be that there's some misalignment on the PSL which has led to some RAM having to be canceled by this new offset. Let's see if its stable for awhile.
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I felt in my bones that the MC was in trouble so I came by and noticed that it hadn't locked for a couple hours. The FSS SLOW was at -1.6V, but putting it back to zero didn't fix things. I adjusted the FSS error point offset to +1 and that took the FSS_FAST off of the +10 V rail. Relocked and seems OK.
We need to plan to make the M Evans mod to the FSS box to make the PC drive less angry.
Last 40 days of MC Alignment trends show that the recent MC WFS tuning / offseting worked out OK. MC REFL seems low and flat. |
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