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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.
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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