9600 Service Manual - gmecorp-usa.com

Image System Calibration 31
9. Select MAG1 field size and while making an exposure, press and release the
collimator iris increment/decrement key until the exposed image is within the “B”
ring indicated on the Beam Alignment Tool pattern as shown in Figure 30.
Figure 30 - "B" Ring of Beam Alignment Tool
A. The flat surfaces should be within the ring. After setting the iris position, remove
any iris “gear play” by manually turning the iris gear in the open direction (without
disturbing the iris servo loop).
B. If the servo loop is disturbed, select another field size, return to MAG 1 and
repeat this step. With the gear play removed, verify the iris remains within the
“B” ring. If not, repeat this step until the iris (with gear play removed) is within the
“B” ring.
NOTE: If any inward bow is observed along the “flat edges” of the collimator, the
measurement must be made across the flats as though the flats are
straight.