Changing The Fiber Holding Block Inserts - THORLABS Vytran LDC401 User Manual

LDC401 & LDC401A Automated Cleavers
7.8.

Changing the Fiber Holding Block Inserts

Both the top and bottom FHB Inserts must be selected according to the diameter of the fiber being clamped. It is
common to have a set of inserts for larger diameters in the left-hand FHB for clamping on the coating, than those
in the right-hand FHB, which typically clamps on the cladding. All inserts are labeled according to the optimum
clamping diameter in microns. For guidance in selecting the proper inserts, see the Insert Selection Guide in Section
10.1 or the Tablet Controller Insert Selection tool (Section 9.5.5). Instructions for changing the inserts are given
below.
To change a top insert:
Do not change the top insert without a bottom insert in place, the top insert can get stuck in the lower
1. Loosen the four (4) set screws accessible from the back of the FHB lid using the 0.035" hex key included
in the tool kit. Do NOT remove the set screws completely; one full turn counter-clockwise should be
sufficient to release the insert.
2. Remove the FHB insert and replace with the desired size. For dual-sided inserts, the label for the desired
size should face outward and be visible.
3. Raise the lever and make sure that the new insert is fully seated and flush with the inside face of the FHB.
Note: The inside face of the FHB is the side closest to the Cleave Blade.
4. The top inserts are secured by re-tightening the set screws until they are snug. Do NOT over tighten.
However see the note below regarding fitment of both Inserts in the FHB together.
Rev B, July 19, 2017
CAUTION
channel.
Figure 17 Changing the Top Inserts
Chapter 7: Cleaving
Page 17