Atmospheric Pre-aligner Manual
4000-0015 Rev 1
42
5. To test the r and z axes, remove the Pre-aligner End Cover, which is
opposite the CCDs.
6. Notice the large gear pulley. This is part of the z-axis drive assembly.
With cleanroom gloves on, carefully grasp the gear and rotate it about
1/8 of a revolution. You should feel the same smooth and continuous
counterforce as generated by the t-axis motor. Again, the axis should
spring back to the original position when you release it.
7. Notice the lead screw at the upper left corner. This is part of the r-axis
drive assembly. With a large slotted screwdriver, rotate the leadscrew
approximately 1/8 of a revolution. You should feel the same smooth
and continuous counterforce as generated by the t and z motors. The
axis should spring back to the original position when you release the
screw.
8. Increase the Torque Limit for r or z and repeat until you feel a much
stronger resistance.
End cover
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