GE H
EALTHCARE
D
IRECTION
5158821-100, R
EVISION
3
E
X
PLORE
L
OCUS
SP S
ERVICE
G
UIDE
Page 120
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Continue to adjust the stage and view the results until the y axis is within 2 pixels of the
previous value (determined in step 6) after 180° of rotation. Use the Worksheet to
record values.
The end result is that at the Source end the y values at 0 and 180 degree rotation are within 2
pixels of each other and within 2 pixels of the Central Slice, AND the y axis at the detector end
is within 2 pixels of the Central Slice.
8.
Once the values are within 2 pixels of each other, capture and save an image after each
rotation and call the files
Tip1
and
Tip2
.
7.2.8
Centre the Stage
This procedure is used to centre the stage between the X-Ray Source and the detector. With the
X,Y Centring Ball tool still mounted :
1.
Click on the
Turn X-Ray Off
button, then
physically rotate the X,Y Centring Ball tool so
that 2 of the 4 adjustment screws are exactly
perpendicular to the detector (i.e. not at an
angle).
2.
Elevate the tool using the Elevation feature in
X-Ray and Motor Controller
until the ball
appears in the centre of the
Fluoro
display.
3.
Move the stage 70mm toward the detector so
that it is positioned in the middle between the
Source and detector.
4.
Mount the Dial Indicator Mount and Precision Dial Indicator.
5.
Adjust the tip on the Precision Dial Indicator to strike the equator of the ball. Make sure the
Indicator is not pegged (i.e. the small needle on the gauge, near the centre of the Dial Indicator,
is around the halfway mark).
Note:
The Precision Dial Indicator is very sensitive and care should be taken not to lean or touch any
part of the system while adjusting the Indicator or the X,Y Centring Ball tool.
6.
Zero the Precision Dial Indicator.
Note:
For fine measurements, the Precision Dial Indicator may not be accurate until after the first
movement.
top view
Summary of Contents for Healthcare eXplore Locus SP
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