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Make sure your
beamstop is in place! It provides important backlight that
allows you to see your crystal. Make sure all your lights are
turned on and at full brightness. |
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Push button to
rotate 180 degrees. If you see the pin pass by, double click on
the screen edge where the pin was last seen, until it reappears.
Be careful not to click too many times as the pin may shoot past
the crosshairs and you will need to click on the other side to
recover. You may use the up and down arrow keys on the interface
for this task if you like, but be sure the step size is set to a
reasonable number of microns (500 if you have far to move, 30
microns or smaller for fine adjustment). |
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If you did not see
the pin during the rotation, then it is too short. Crank the
manual crank (moves sample in direction of pin) in the hutch
until the pin becomes visible. |
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Try another 180
degree rotate periodically to see if the pin is above or below
the screen. |
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Check the centering
computer (a1-vid, f1-vid & f2-vid) in the hutch and make sure
the screen is not blank. If the screen is blank, you will need
to reboot the machine. Pull the power cable out for a few
seconds then replace it. The machine should reboot. Log in as
specuser. Restart the centering programs. |
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If the centering
computer screen is not blank, then Restart the centering
programs. |
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On the station computer (A1 & F1, or
Guideline for F2), open a terminal window and type
"stop_centering". Now type
start_centering. After a while
the centering program on both server and client should be
visible. |
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Make sure the number in the focus
control box (left) is non-zero! If it is zero, the crosshair may
also be off and the camera will not respond to the zoom slider.
You will need to type "stop_centering"
and "start_centering" again
until the interface comes up with a non-zero number in the focus
control box. Try this several times if necessary.
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As a last resort, power cycle the
Navatar zoom control box in hutch and restart centering. (call
MacCHESS). |
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Always check the angles on the
spindle, centering program and ADX. If they do not all agree,
then push the "home" button
and wait till they synchronize. |
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On a terminal window of the data
collection computer, type "start_ccd_plus".
Please wait, it takes a while. Read the section on "How do I
restart the centering system?". |
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To stop everything type
"stop_ccd_plus". |
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Push the X-window resize button
twice. This will minimize and re-expand the window. The slider
should return. |
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Check to make sure
the data collection program is running. If not, start up the
data collection program and restart the centering. |
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Check to make sure
the data collection program is communicating with the phi motor.
From "Manual Control" try rotating 90 degrees. |
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If this fails, try
restarting the data collection GUI. |
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If still a problem,
then contact MacCHESS person on duty for help. |
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Check to see if the angle display
agrees with the actual value on the spindle (visible on video
screen) and with angle value in ADX data collection software. If
the angles do not agree, then push the
home button and wait until the process is complete.
Should be OK. |
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Check to make sure the data
collection program is running. If the program was recently
restarted, you will need to restart the centering software. See
"How do I restart the centering programs?". |
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Check to make sure the data
collection program is communicating with the phi motor. From
"Manual Control" try rotating 90 degrees. If this fails, you
will need to restart the data collection software. Refer to
"How do I restart Everything?". |
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If still a problem, then contact
MacCHESS person on duty for help. |
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Make sure the
crystal is centered, rotate 90 degrees and center again. |
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The camera may be
out of alignment. |
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A trained operator
can use the midpoint tool to adjust the crosshairs without
removing sample. |
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Best to have a
MacCHESS operator check crosshairs with fiber after current data
collection is finished. Will require sample be removed. |
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