Hydra CLI thisis
thisis - identify a lost fiber
SYNOPSIS
thisis
DESCRIPTION
This command has multiple behaviours depending on the sit-
uation we are dealing with. It is useful to handle fail-
ures to grab and drop buttons as well as to identify
unknown buttons in the gripper.
When the gripper fails to drop or grab a button a record
is saved stating which one was the fiber involved in the
failure and the type of failure.
If at the moment of calling this command the gripper is
empty and a record of a failure exists, then the position
of the fiber will be updated to the current location of
the gripper. You can repeat the command as many times as
you want before clearing the trouble condition by moving
or parking the fiber. If there's no record of a failure
the the command will just return.
If at the moment of calling this command the gripper is
holding a button and a record of a failure exists, the
command will print a message identifying the fiber and
stating its current condition. No update of the fiber
position will be done. If there's no record of a failure
then you will have to manually identify the fiber. Use the
"dropit" command to drop the fiber, clear its trouble con-
dition and update its position.
Normal procedure after a failure to grab a button is to
nudge the gripper and re-center the gripper on the but-
ton's head using the gripper camera-monitor. Then call
"thisis" to update the button's position. Finally park or
move the button to clear its trouble condition. Repeat the
operation if the gripper fails to grab the button again or
check that there'are no dirt particles beneath the button.
Normal procedure after a failure to drop a button is to
call "thisis" to identify the fiber in troubles and then
call "dropit" to drop the fiber and update its current
location.
SEE ALSO
park(n), move(n), dropit(n), thisis(n)
AUTHOR
R.Cantarutti, National Optical Astronomy Observatories
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