From: Kaike
Subject: Re: [sloan-25mlog 7421] 2.5m obslog 20240925 (SJD 60579)
Date: Thu, 26 Sep 2024 07:13:06 -0700
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>=20
> 2. Secondary mirror hiccup, got hung on a focus correction. Eventually =
figured out how to restore normal communication to the mirror.
>=20
>=20
>=20
> -- Cherno is throwing an error that it cannot apply focus corrections. =
Restarted cherno, see if that helps any.
>=20
>=20
> -- Mirror status shows 'Sec state' stuck in a 'Moving' state. However, =
while the errors are being thrown, it appears that the focus adjustments =
are still being applied.
>=20
Mirror number changes but M2 is stuck, doesn=E2=80=99t move. Here is a =
note on the page: Tips on TCC and mirror:=20
If M2 gets stuck but still connected (as indicated by a long M2 moving =
time on mirror status window), a =E2=80=9Ctcc talk sec stop=E2=80=9D =
command should be able to stop the stuck M2 adjustment process.
Hope this helps.
-Kaike
APO
 =
/
/
SDSS Observing Documents and Procedures
 =
/
Tips on TCC and Mirrors
 =
 =
=
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2. =
Secondary mirror hiccup, got hung on a focus correction. Eventually =
figured out how to restore normal communication to the =
mirror.-- Cherno is throwing an error that it cannot =
apply focus corrections. Restarted cherno, see if that helps =
any.-- Mirror status shows 'Sec state' stuck in a 'Moving' =
state. However, while the errors are being thrown, it appears that the =
focus adjustments are still being =
applied.Mir=
ror number changes but M2 is stuck, doesn=E2=80=99t move. Here is a note =
on the page: Tips on TCC and mirror: If M2 gets stuck but still connected =
(as indicated by a long M2 moving time on mirror status window), a =
=E2=80=9Ctcc talk sec stop=E2=80=9D command should be able to stop the =
stuck M2 adjustment process.Hope =
this helps.-Kaike=
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