Input Focusing Adjustment, X-Y Axes - Unitek Miyachi LW250 Operation, Maintenance And Service Manual

It is important to make this adjustment to assure maximum beam input into the fiber, and to
avoid any damage to the fiber end face. See Chapter 8 in the section titled, Alignment Of The
Beam Into The Fiber Optic Cable.
Input Focusing Adjustment, X-Y Axes. Always adjust the X-Y axes of the input
focusing unit when the optical fiber is replaced. Without the X-Y axes adjustment to correct the
input focusing, the laser beam may burn the optical fiber's input end. Refer to Chapter 8 in the
section entitled, X-Y Axis Adjustment.
When the same optical fiber is removed and recon-nected, readjustment of the X-Y axes is not
required if the same end is used. If the opposite end of the fiber is used as the input end,
readjustment is required.
Connection To Final Focusing Unit. To connect the fiber to the final focusing unit:
1. Refer to Figure 5-7. Carefully extend the fiber optic cable to the final focusing unit
without exceeding the minimum bend radius or causing any mechanical shock to the
cable.
2. Remove the rubber end cap from
the output end of the fiber. Blow it
clean as previously described.
3. Insert the fiber connector into the
final focusing head and secure it
as previously described.
990-605 REV B: May, 1997
Figure 5-7. Final Focusing Unit Connection
LW250 PULSED Nd: YAG LASER
CHAPTER 5: GETTING STARTED
SIGCBL.PCX
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