9600 Service Manual - gmecorp-usa.com

8 Image System
COLLIMATOR
OVERVIEW
The iris collimator is located under a cover as shown in Figures 1 and 10. It has three
motors (see Figure 5 below):
• Collimator iris
• Leaf rotation
• Leaf in/out
The operator drives a motor by pressing the desired key on the control panel. The
controls shown in the left column of Table 1 are provided on both the left and right C-
Arm control panels (see Figure 6).
When an image field size is selected with “NORMAL,” “MAG1,” and “MAG2,” the
collimator iris is opened or closed to match the selected field size. The image intensifier
receives commands at the same time and adjusts for the selected field. Information on
the image intensifier is covered after the collimator section.
The iris motor has a potentiometer mechanically linked to it that provides feedback for
indication of iris size. The iris size may be adjusted independently of the “MAG’” size,
but it cannot be adjusted to exceed the selected field size.
Controls are also provided to open, close, and rotate a pair of semi-transparent copper
leaves that provide further collimation of the X-ray beam.
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Figure 5 - Iris Collimator
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