THORLABS Vytran LDC401, User Manual

Page: 58 / 62

LDC401 & LDC401A Automated Cleavers Chapter 12: Servicing and Troubleshooting
Page 54 TTN100064-D02
12.3. Toubleshooting
Symptom Possible Cause Solution
Unit fails to reach
Cleave Tension
Fiber is not actually being held
because levers were not lifted
Lift levers
Fiber is not actually being held
because inserts are not
appropriate for that fiber size
Replace inserts with appropriately-sized
Inserts
Fiber is slipping in FHB’s because
of oil on Inserts
Clean lower v-groove inserts and top
inserts with cotton swab dipped in acetone
when vacuum is off
Magnetic clamping force is too
weak for the fiber you are using
Use Thumb Screws
Fiber is slipping because top
inserts are not fully seated in slots
(magnet force reduced)
Loosen top set screws, lower FHB lids fully
by Lifting Levers, re-tighten set-screws
The lids won’t open
Levers still up, magnetic attraction
still large
Press down on the levers to lift lids slightly,
then try opening lids
The last user tightened the
thumbscrews
Rotate thumbscrews counterclockwise until
they release
Unit fails to cleave fiber
Blade never reaches fiber (or
barely reaches fiber)
Set recommended Pre-cleave Advance for
Fiber Diameter or adjust Blade Offset if
blade has just been replaced or height
changed.
Blade reaches fiber but does not
cleave it since it is chipped
Raise Cleave Blade Housing so that Cleave
Blade strikes fiber at different location
Blade passes below fiber Raise Cleave Blade Housing
Blade passes above fiber Lower Cleave Blade Housing
Blade reaches fiber but does not
cleave it because fiber is large
and FHB separation is large
Use Micrometer Backstop
Cleave angles are
too large
Fiber is slipping in FHB’s because
of oil on inserts
Clean Lower v-groove insert and top insert
with cotton swab dipped in acetone when
vacuum is off
Fiber is slipping in FHB’s because
fiber is large and a large force is
required to tension it.
Use Thumb-screws to clamp
FHB lids.
Fiber is twisting during loading
due to debris in FHB’s
Clean Lower v-groove insert and top insert
with soft brush, brushing from the inside out
Cleave Tension too low Raise Cleave Tension
Fiber offset on left and right is
mismatched due to insert
selection
Use Insert Selection Guide to select inserts
such that fiber offsets will be as close as
possible
Fiber is twisting when last FHB lid
is closed.
After closing the first lid (the left lid), flip the
discard end of the fiber up with a stick or a
pair of tweezers to let it untwist before
closing the lid of the second (right) FHB.
Capillary tube/PCF
breaks
when lids are lowered
Clamping force created by
magnets is too high
Remove half of the top
magnets in lid with a stick or
magnet to lower clamping force
Fiber end-face appears
shattered or rough when
examined closely
Cleave Tension too high Lower Cleave Tension
Rotary Stage fails to
return
to horizontal position
Unit lost power while stage was
rotated forwards
Keep cycling power until Rotary Stage
returns to the horizontal position (may be
necessary to repeat several times)