THORLABS Vytran FFS2001 Series User Manual page 78

FFS2001 Series
10.2.3 Adjust Cleave Tension
1. Insert the FHB to be adjusted at the appropriate cleave position on the splicer. Note: Make sure to leave
the cleave lever in its released position.
2. Manually push the center sliding block up against the inside wall against the FHB (towards the cleave
block).
3. Engage the dial tension gage with its tangent point on the sliding block of the FHB as shown in Figure 59.
"Pre-load" the tension gauge until it reads slightly below the desired cleave tension.
4. Release the center sliding block. The block should move backwards very slightly and be "supported" by
the tension gauge. If the block does not move at all or moves back to far, try again with different "pre-
load" tension. Repeat until the "pre-load" tension is such that it just "catches" the sliding block when it is
released. This tension is the cleave tension. With practice, this process can be quickly accomplished by
"tapping" the sliding block up against the inside wall of the FHB while applying tension with the tension
gauge. Note: It is important to read the cleave tension just as the sliding block moves off the inside wall
of the FHB, as this corresponds to the cleave location.
5. If the cleave tension needs adjustment, access the tension screw with a 0.050" hex key through the access
hole in the FHB (Figure 59). Increase the tension by turning the screw clockwise; decrease the tension by
turning the screw counterclockwise. One full turn of the screw adjusts the tension approximately by 20
grams.
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Figure 58 Change Rotary FHB Insert
Chapter 10: Maintenance
TTN286373-D02