LDC401 & LDC401A
Automated Cleavers for
Fibers with Ø80 µm to
Ø1.25 mm Claddings
User Guide
LDC401 & LDC401A Automated Cleavers
Table of Contents
Chapter 1 Warning Symbol Definitions..............................................................................................1
Chapter 2 Safety....................................................................................................................................2
Chapter 3 Description...........................................................................................................................3
3.1. Introduction ..................................................................................................................... 3
3.2. Parts Checklist ................................................................................................................ 3
Chapter 4 Set-up....................................................................................................................................6
4.1. Initial Set-up ..................................................................................................................... 6
4.2. Power-Up .......................................................................................................................... 7
4.3. Shut-Down ....................................................................................................................... 7
Chapter 5 The Tablet Controller..........................................................................................................8
Chapter 6 Theory of Cleaving..............................................................................................................9
6.1. Specialty Fiber Cleaving Processes .............................................................................. 9
Chapter 7 Cleaving...............................................................................................................................10
7.1. Overview ........................................................................................................................ 10
7.2. The Cleave Process ...................................................................................................... 10
7.3. The Fiber Holding Blocks, Inserts, Lifting Levers, and Thumbscrews .................... 11
Stripping the Fiber ........................................................................................................ 13
7.4.
7.5. Loading the Fiber .......................................................................................................... 14
7.6. Cleaving the Fiber ......................................................................................................... 15
7.7. Unloading the Fiber ....................................................................................................... 16
7.8. Changing the Fiber Holding Block Inserts .................................................................. 17
7.9. Specialty Cleave Process ............................................................................................. 19
7.9.1. Subcritical Process .............................................................................................................. 19
7.9.2. Micrometer Backstop .......................................................................................................... 19
Chapter 8 Maintenance........................................................................................................................21
8.1. Inspecting the Fiber Holding Blocks ........................................................................... 21
8.2. Inspecting the Cleave Blade ......................................................................................... 22
8.3. Re-Positioning the Cleave Blade ................................................................................. 23
8.4. Replacing the Cleave Blade ......................................................................................... 24
8.5. Load Cell Calibration .................................................................................................... 26
Chapter 9 Controlling the LDC401 and LDC401A............................................................................27
9.1. A Quick Start Guide to Cleaving with LDC401 and the Tablet Controller ................ 27
9.1.1. Cleave Screen ..................................................................................................................... 28
9.2. Tablet Controller Online ............................................................................................... 31
9.2.1. LDC Main Screen ................................................................................................................ 32
LDC401 & LDC401A Automated Cleavers
9.3. Settings .......................................................................................................................... 33
9.3.1. Password ............................................................................................................................. 34
9.3.2. Access Permissions ............................................................................................................ 35
9.3.3. Voice Notifications ............................................................................................................... 36
9.3.4. Language ............................................................................................................................ 37
9.3.5. Comm Ports ........................................................................................................................ 38
9.4. Files ................................................................................................................................ 38
9.4.1. Open File ............................................................................................................................. 39
9.4.2. Save File As ........................................................................................................................ 39
9.5. Tools ............................................................................................................................... 40
9.5.1. Terminal .............................................................................................................................. 40
9.5.2. Motor Control ...................................................................................................................... 41
9.5.3. Auto Parameter ................................................................................................................... 41
9.5.4. Blade Service ...................................................................................................................... 42
9.5.5. Insert Selector ..................................................................................................................... 42
9.6. Log Out ........................................................................................................................... 43
9.7. Exit/Close ....................................................................................................................... 43
9.8. Parameter Description .................................................................................................. 43
9.9. Parameter Limit ............................................................................................................. 45
9.10.Setup Tips – Cleaving a New Fiber .............................................................................. 46
Chapter 10 Accessories.........................................................................................................................47
10.1.Fiber Holder Inserts ...................................................................................................... 47
Chapter 11 Specifications.....................................................................................................................51
Chapter 12 Servicing and Troubleshooting........................................................................................52
12.1.Packaging ...................................................................................................................... 52
12.2.Frequently Asked Questions ........................................................................................ 53
12.3.Toubleshooting ............................................................................................................. 54
Chapter 13 Regulatory...........................................................................................................................55
Chapter 14 Thorlabs Worldwide Contacts..........................................................................................56
LDC401 & LDC401A Automated Cleavers Chapter 1: Warning Symbol Definitions
Chapter 1 Warning Symbol Definitions
Below is a list of warning symbols you may encounter in this manual or on your device.
Symbol Description
Direct Current
Alternating Current
Both Direct and Alternating Current
Earth Ground Terminal
Protective Conductor Terminal
Frame or Chassis Terminal
Equipotentiality
On (Supply)
Off (Supply)
In Position of a Bi-Stable Push Control
Out Position of a Bi-Stable Push Control
Caution: Risk of Electric Shock
Caution: Hot Surface
Caution: Risk of Danger
Warning: Laser Radiation
Rev B, July 19, 2017 Page 1
Caution: Spinning Blades May Cause Harm
LDC401 & LDC401A Automated Cleavers Chapter 2: Safety
Chapter 2 Safety
CAUTION
Damage to the diamond blade may occur if an attempt is made to cleave a coated section of fiber;
make sure that the fiber is stripped down to bare glass and is cleaned thoroughly at the point where
the blade will contact the fiber.
CAUTION
The Cleave Blade should never touch the fiber on the initial, fast move towards the fiber,
or damage to the blade could result.
WARNING
Do not place your fingers between the left Fiber Holding Block and the ruler block during the cleaving
process or they will be pinched!
CAUTION
Do not change the top insert without a bottom insert in place, the top insert can get stuck in the lower
channel.
WARNING
Use great care when working near or handling the Cleave Blade, as the diamond tip is “knife edge”
sharp and can very easily cut through skin.
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LDC401 & LDC401A Automated Cleavers Chapter 3: Description
Chapter 3 Description
3.1. Introduction
Thank you for purchasing an LDC401 or LDC401A Large Diameter Fiber Cleaver. These cleavers are designed for
cleaving optical fibers from Ø80 µm up to Ø1.25 mm. During standard operation, the cleavers use a Tension-andScribe cleave method, whereby an axial tension is first applied to the fiber followed by an automated Scribe Process
utilizing a diamond Cleave Blade. The LDC401A can also produce angle cleaves by first applying a pre-programmed
torsion, followed by axial tension and the automated Scribe Process. When configured and operated properly, the
cleavers can produce both flat and angled (LDC401A only) cleaves with high-quality end face finishes. For detailed
information on the Tension-and-Scribe technique please refer to Chapter 6.
Chapters 3 through 7 of this manual deal with the operation of the cleaver, including information on the Cleave
Process and maintenance. Chapters 8 and 9 provide advanced Users additional information about the types of
Cleave Processes and parameters that can be adjusted via the Tablet Controller. This manual also contains:
Setup Tips (Section 9.10)
Frequently Asked Questions (Section 12.2)
Troubleshooting (Section 12.3)
Specifications (Chapter 11)
Accessories (Chapter 10)
3.2. Parts Checklist
When unpacking the LDC401 for the first time, verify that the box contents look like this:
Figure 1 Unit and Accessories in Box with Top Foam Sheet and Documents Removed
Rev B, July 19, 2017 Page 3
LDC401 & LDC401A Automated Cleavers Chapter 3: Description
Check to make sure that you have the following items:
Cleaver12V Power Supply
Line Cord
Tablet Controller
USB Cable (for tablet data)
USB Cable (for tablet power)
Stand for tablet
Nylon brush
0.035″ Hex Key
0.050″ Hex Key
3/32″ Hex Key
Top inserts (purchased separately)
Bottom inserts (purchased separately)
Canvas Bag
Figure 2 The LDC401A with Included Accessories
If you are missing any of the accessories or need replacements, please contact the distributor from whom you
bought the cleaver. Visit https://www.thorlabs.com/locations.com for contact information.
®
Note: Please save the packaging material and pink anti-static bag for returning the unit back to Vytran
for service.
This packaging will reduce the risk of damage during shipment.
Figure 3 These Packaging Materials Should be Saved
Page 4 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 3: Description
Both the LDC401 and LDC401A include a micrometer that can back up the fiber during cleaving, particularly useful
for large-diameter fibers. The LDC401A incorporates a Rotary Stage that can rotate the right Fiber Holding Block
in order to twist the fiber and produce an angle cleave. Please note that it is not possible to add Angle-Cleaving
capability to the LDC401.
The illustrations below show the differences between the LDC401 and LDC401A.
Micrometer
Backstop
Figure 4 LDC401 Cleaver with Micrometer Backstop
Rotary Stage
for Angle
Micrometer
Cleaves
Backstop
Figure 5 LDC401A Cleaver with Micrometer Backstop and Rotary Stage for Angled Cleaves
Rev B, July 19, 2017 Page 5
LDC401 & LDC401A Automated Cleavers Chapter 4: Set-up
Chapter 4 Set-up
4.1. Initial Set-up
1. Plug in the AC power cord. The power supply
accepts an AC input of 100 - 240 VAC; 47 63 Hz.
2. Connect the AC power cord to the external
power supply.
3. Connect the DC power cable to the unit.
4. Locate the USB cable that has a microUSB Type
B plug. Plug it into the power socket of the tablet.
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LDC401 & LDC401A Automated Cleavers Chapter 4: Set-up
5. The other USB cable has one end that is USB
Type A. Plug that end of that cable into the USB
socket of the tablet.
6. Plug the USB Type B plug into its socket on the
back of the unit.
7. Plug the USB Type A plug (on the first USB
cable) into its socket on the back of the unit.
4.2. Power-Up
1. Turn on the Cleaver using the ON/OFF Rocker Switch located on the back of the unit.
2. Turn on the Tablet Controller (press and hold the Power Button).
4.3. Shut-Down
Turn off the Cleaver using the on/off Rocker Switch located on the back of the Cleaver.
Rev B, July 19, 2017 Page 7
LDC401 & LDC401A Automated Cleavers Chapter 5: The Tablet Controller
Chapter 5 The Tablet Controller
The Tablet Controller provides a simple, easy to use interface for configuring, controlling and monitoring LDC401
series cleavers.
Figure 6 Tablet Controller – LDC401 Main Screen
A status bar at the top of the screen indicates the machine connected, the file currently open (if any) and status
icons for file, access security and USB connection.
At the bottom of the screen, a toolbar provides access to Tablet Controller settings, cleave files, LDC401 specific
tools and fast security log-out.
Features of the Tablet Controller include:
User Password setup,
User accessibility control to safeguard against accidental changes to parameters and user files,
Language selection,
Voice notification,
USB communications setup,
Almost unlimited file storage and access with optional over-write protection,
Fast security log-out,
Easy parameter viewing/editing
Tool features specific to LDC401 series cleavers include:
Motor control screens for manipulating Fiber Holding Block (FHB), Blade, and Rotation,
Auto-Parameter screen, generates theoretical optimal parameters according to fiber/cleave angle,
Blade Service screen for setting up blade position and usage counters,
Insert Selection tool for choosing the optimum Insert combination,
Terminal Client
For a more complete description of the Tablet Controller interface and parameters, please refer to Chapter 9.
Page 8 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 6: Theory of Cleaving
Chapter 6 Theory of Cleaving
The LDC401 and LDC401A automated fiber cleavers are designed for cleaving optical fibers with claddings from
Ø80 µm up to Ø1.25 mm. To produce a flat cleave, the cleavers use a “tension-and-scribe” method, whereby an
axial tension is first applied to the fiber followed by an automated Scribe Process utilizing a diamond Cleave Blade.
Figure 7 Pure Tension: Maximum Stress is in the Direction of the Fiber Axis and the Cleave is
Perpendicular to the Axis
The LDC401A is also capable of producing angled cleaves. To accomplish this, a pre-programmed torsion is applied
to the fiber first, followed by axial tension, and then the automated Scribe Process.
Figure 8 Combined Tension and Torsion: Maximum Resultant Stress is at an Angle between the Fiber
Axis and 45° and the Cleave is Perpendicular to this Direction
When configured and operated properly, both cleavers are capable of producing cleaves with high-quality end-face
finishes.
6.1. Specialty Fiber Cleaving Processes
Two additional process capabilities are available on the LDC401 and LDC401A. These processes are primarily
utilized for cleaving specialty fibers such as microstructured fiber, highly stressed fibers (MM and PM), or capillary
tubing. The specialty fiber processes are used to produce flat cleaves and improve end face quality but require the
execution of additional steps.
1. Subcritical Process
The “Subcritical Process” applies a tension that is lower than required for a “standard” cleave. The blade
then scribes the fiber, and the tension is slowly (and incrementally) increased to propagate the scribe and
produce the cleave.
2. Micrometer Backstop
The flat micrometer tip acts as a backstop for the fiber during the Cleave Process. When using the
Micrometer Backstop, it is possible to reduce the tension applied to the fiber.
Both of these processes will be described in greater detail in later in the manual.
Rev B, July 19, 2017 Page 9
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
Chapter 7 Cleaving
7.1. Overview
The LDC401 and LDC401A cleave fiber using the tension-and-scribe technique as follows:
1. A stripped fiber is secured in Fiber Holding Blocks (FHBs).
2. The left FHB moves to the left, tensioning the fiber.
3. A diamond-coated blade approaches the fiber and makes a small scribe.
4. The tension causes the scribe to propagate through the fiber, resulting in a cleave.
To obtain an angled cleave, the fiber is twisted by a rotary stage before the fiber is tensioned (LDC401A only).
Cleave
FHB Lid
Lifting
Lever
Ruler Block
This chapter provides an in-depth description of the manner in which fiber is cleaved using the LDC401 and
LDC401A Fiber Cleavers.
Blade
Figure 9 System Overview
Fiber Holding
Block (FHB)
Rotary Stage
(LDC401A only)
Micrometer
Backstop
7.2. The Cleave Process
The cleaver utilizes two Fiber Holding Blocks (FHBs) to securely clamp and position the fiber prior to cleaving. The
left FHB has a linear drive mechanism for applying tension to the fiber. The right FHB is either stationary (LDC401)
or outfitted with a rotary drive mechanism for twisting the fiber (LDC401A). A load cell is incorporated into the left
FHB for monitoring fiber tension. Once the fiber is positioned and securely clamped in the FHBs, an automated
Cleave Process can be initiated by pressing the “Start” button.
Parameters that can be adjusted using the Tablet Controller are in bold. Descriptions of these parameters are
provided in Section 9.8. The majority of Users will only need to set the Fiber Diameter (cladding), Cleave Tension,
and Pre-Cleave Advance while leaving the rest of the Parameters set to their default values.
The Cleave Process proceeds as follows:
1. For flat cleaves, the left FHB will slowly pull to the left until the specified Cleave Tension is reached. For
angled cleaves performed with the LDC401A, the right FHB will rotate to the specified Cleave Rotation
Angle, and then left FHB will slowly pull to the left until the specified Cleave Tension is reached.
2. While the fiber is held under tension (and rotated if performing an angled cleave), the diamond blade
advances towards the fiber. After the blade has traveled the Blade Offset + Pre-Cleave Advance distance,
it begins oscillating towards the fiber in small back-and-forth steps. As soon as the diamond blade contacts
the fiber it creates a small scribe, which rapidly propagates through the fiber due to the pre-applied tension.
Page 10 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
3. When the fiber is cleaved, the cleaver senses the drop in tension and immediately draws the Cleave Blade
back, the left FHB pulls further left to draw the cleaved fiber away from the waste piece, and the rotary
stage returns to a level position.
These cleavers are configured such that the cleave “discard” is on the right. Though it is possible to use the cleaver
the ‘other way around’, such that the waste is on the LHS of the machine, it is less convenient to do this, and on
the LDC401A this also necessitates that the cleaved fiber is drawn out through the rotational FHB, which carries an
increased risk of contamination of the fresh cleave through unintentional mechanical contact.
While it is typically preferable to clamp directly on the cladding (bare glass) on the discard side, it is also possible
to center-strip the fiber and to clamp on the buffer. This may be advantageous for certain types of non-circular fiber
that would otherwise rotate uncontrollably during clamping. The “non-discard” side (passing through the left-hand
FHB) should be clamped on the coating whenever possible to avoid potential damage to the glass. The fiber should
be clamped working from one side of the machine to the other, that is to say, if the “non-discard” (left) side is
clamped first, prior to the “discard” (right) side, then all operations should be carried out on the left side before
securing the right side, to minimize the possibility of twisting the fiber during clamping, which would introduce torsion
in to the fiber, and therefore uncontrolled angle.
Figure 10 Two Pieces of Fiber after a Cleave
It is critical that the Cleave Tension be set appropriately for the fiber being cleaved. If the tension is set too low,
the fiber may not cleave and the diamond blade could be damaged due to excessive lateral stresses as the fiber
flexes around the blade. If the Cleave Tension is set too high, the fiber may break at the clamping points prior to
reaching the desired tension, or, if the cleave is successful, the end face may have excessive “misting”, fracturing
and/or roughness.
7.3. The Fiber Holding Blocks, Inserts, Lifting Levers, and Thumbscrews
The Fiber Holding Blocks (FHBs) are designed to accommodate a wide range of fiber buffer and cladding sizes
through the use of changeable top and bottom fiber holder Inserts, which must be purchased separately. The bottom
inserts feature V-grooves and are available in three varieties. Insert options are outlined in the table below. The
VHD and VHF series of bottom inserts incorporate holes for a vacuum feed to assist in loading the fiber. The VHF
series of Transfer Bottom Inserts are designed to work with the VHT1 Transfer Clamps to aid in moving the fiber
between compatible Vytran stations while maintaining coarse alignment, allowing safe easy handling, and also
providing accurate registration/repeatable lengths of the cleaved parts. For large fibers that are too stiff to be sucked
into place by the vacuum, the VHE series of inserts have long extensions that allow the fiber to be held in place by
a user’s finger while the FHB Lid is closed. Both the bottom inserts and the top inserts (which feature flat clamping
areas) must be sized according to the buffer/cladding diameter. Selecting the correct inserts ensures that full cleave
tension can be applied without the fiber slipping. All inserts are labeled with a nominal accepted diameter in microns.
Rev B, July 19, 2017 Page 11
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
In the event that you wish to use a fiber that is between insert sizes, refer to the chart in Section 10.1 to determine
which inserts would be most suitable or use the Insert Selection tool in Tablet Controller.
Item #
VHA00
VHA05
VHA10
VHA15
VHA20
VHA25
VHA30
VHD080
VHD125
VHD160
VHF160
VHD250
VHF250
VHD400
VHF400
VHD500
VHF500
VHD750
VHF750
VHE10
VHE15
VHE20
VHE25
VHE30
Lifting levers are used to overcome the very high clamping forces of the FHB magnets. To lift the FHB lid, press
down on the lifting lever first, and then lift the Lid. When closing an FHB Lid, make sure that the lever is in the
downward position: this will prevent the FHB lid from slamming down on the fiber, possibly damaging it. After the
lid comes to rest on its lifting lever cam, it can be closed gently by lifting the lever.
Fiber Holder Insert
Type
Top 57 µm / 759 µm 275 µm / 970 µm N/A
Top 410 µm / 1008 µm 560 µm / 1269 µm N/A
Top 812 µm / 1515 µm 1036 µm / 1770 µm N/A
Top 1288 µm / 2022 µm 1534 µm / 2268 µm N/A
Top 1772 µm / 2505 µm 2032 µm / 2944 µm N/A
Top 2278 µm / 3029 µm N/A N/A
Top 2609 µm / 3198 µm N/A N/A
Bottom 57 µm / 100 µm N/A Yes
Bottom 88 µm / 161 µm N/A Yes
Bottom
Transfer Bottom
Bottom
Transfer Bottom
Bottom
Transfer Bottom
Bottom
Transfer Bottom
Bottom
Transfer Bottom
Bottom 773 µm / 1271 µm 1034 µm / 1523 µm No
Bottom 1280 µm / 1769 µm 1534 µm / 2007 µm No
Bottom 1787 µm / 2267 µm 2033 µm / 2513 µm No
Bottom 2270 µm / 2844 µm N/A No
Bottom 2692 µm / 3198 µm N/A No
Side 1 Min/Max
Accepted Diameter
112 µm / 208 µm N/A Yes
177 µm / 320 µm N/A Yes
279 µm / 519 µm N/A Yes
346 µm / 795 µm N/A Yes
516 µm / 1047 µm N/A Yes
Side 2 Min/Max
Accepted Diameter
Vacuum
Holes
Figure 11 A Lifting Lever Propping up the FHB Lid
Page 12 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
Thumbscrews
Lift levers to permit
lids to close fully
Figure 12 Lifting Levers and Thumb Screws
Thumbscrews on the FHB lids provide added clamping force for large diameter fibers (>400 µm) or for fibers with
very slippery coatings requiring additional clamping force. If the thumbscrews are not required, they may be kept
out of the way by threading them backwards into the lids or by removing them completely.
Note that when the thumbscrews are used, the user should be sure that they are undone when operating the lifting
levers to open the FHB Lid.
Also note that thumbscrews are not a substitute for correctly chosen and fitted FHB inserts!
The normal clamping force created by the magnets may be excessive for some applications involving very delicate
fiber (e.g. thin-walled capillary tubes and PCF). If the lids crush the fibers, it will be necessary to reduce the clamping
force. This can be achieved by pushing out the magnets in the lids with a stick, or pulling them out with a rare-earth
magnet. It is prudent to mark one side of the magnets before removal so the orientation and position are easily
identified. After completing work on the delicate fiber, remember to return the magnets to the lid holes facing the
correct direction. They should all be attracted to, not repelled by, their counterparts in the FHB body. The polarity
of these magnets alternates, and can most easily be determined by a rod-shaped magnet that is easy to hold
between two fingers.
7.4. Stripping the Fiber
The fiber end should be stripped down to the cladding over a sufficient length to allow for the desired post cleave
length plus the discard length. The discard length should ideally allow for full clamping in the FHB, and should
therefore be 1.8″ (45 mm). A Ruler Block is provided for accurate positioning of the strip interface relative to the
cleave point. The fiber must be stripped down to bare glass and thoroughly cleaned at the location where the
diamond blade strikes the fiber (the cleave point).
Figure 13 Stripping Fiber using a Miller Stripper
Rev B, July 19, 2017 Page 13
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
7.5. Loading the Fiber
To load the fiber for cleaving:
1. Make sure that the correct Cleave File (Fiber File) and/or process parameters are selected for the fiber to
be cleaved (see Chapter 9). In the first instance the critical parameters can be estimated using the Auto
Parameter Tool in the Tablet Controller.
2. If the FHB lids are closed, loosen the thumbscrews, press the lifting levers down to release the clamping
force and open the lids. The internal vacuum pump will turn on for up to 30 seconds to aid in loading fibers.
If the FHB lids are already open, the internal vacuum pump can be initiated by either pressing the blue
START button or by fully closing and then re-opening the left-hand FHB lid.
3. Check that the correct FHB inserts (top and bottom) are installed and that they are free from fiber and/or
coating debris. Position the fiber in the left-hand FHB V-groove with the stripped (discard) end positioned
in the right-hand V-groove.
Figure 14 Positioning a Fiber in the Left-Hand FHB V-Groove
4. Check that the lifting levers are in the downward position and carefully lower the left-hand FHB lid.
5. With the lifting lever in the downward position the lid will not contact the fiber and the fiber is still free to
move. Set the Cleave Length by positioning the fiber such that the coating-to-glass interface is aligned
with the desired graduation on the Ruler Block. Once the fiber is positioned properly, raise the left-hand
lever to clamp the fiber.
CAUTION
Damage to the diamond blade may occur if an attempt is made to cleave a coated section of fiber;
make sure that the fiber is stripped down to bare glass and is cleaned thoroughly at the point where
the blade will contact the fiber.
6. With the fiber securely clamped in the left-hand FHB, check that the free end of the fiber is positioned in
the right-hand V-groove, and then carefully lower the right-hand FHB lid. Raise the right-hand lever to clamp
the fiber.
7. If cleaving fibers with cladding diameters larger than 400 µm or fibers with very slippery coatings, the
thumbscrews on the FHB lids may need to be tightened for increased clamping force and reduced chance
of fiber slippage during tensioning. If the thumbscrews are not required, they may be kept out of the way by
threading them backwards into the lids or by removing them completely.
8. The fiber is now ready to be cleaved.
Page 14 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
7.6. Cleaving the Fiber
To cleave the fiber:
1. Confirm that the fiber is loaded properly and that both levers are raised.
2. Initiate the Cleave Process by pressing the blue START button on the unit or the START button on the
Tablet Controller. The Cleave Process is fully automated as follows:
a. If on, the internal Vacuum Pump will be turned off.
b. If performing an Angled Cleave with the LDC401A, the right-hand FHB will rotate to the Cleave
Rotation Angle.
WARNING
Do not place your fingers under the right Fiber Holding Block during the cleaving process
or they will be pinched!
c. The left-hand FHB will begin moving to the left, applying tension to the fiber.
d. Once the Cleave Tension is reached, the left-hand FHB will stop moving.
e. The Cleave Blade will move forward towards the fiber over the Blade Offset + Pre-Cleave
Advance distance.
CAUTION
The Cleave Blade should never touch the fiber on the initial, fast move towards the fiber,
or damage to the blade could result.
f. The Cleave Blade will begin oscillating in a forward-and-back motion and will progressively advance
towards the fiber.
g. Once the Cleave Blade contacts the fiber, a small scribe is generated and the fiber should cleave
immediately.
h. When the fiber is cleaved, the cleaver senses the drop in tension and immediately draws the Cleave
Blade back, the left FHB pulls further left to draw the cleaved fiber away from the waste piece, and
the rotary stage returns to a level position.
WARNING
Do not place your fingers between the left Fiber Holding Block and the ruler block during the cleaving
process or they will be pinched!
Figure 15 Initiating a Cleave by Pressing the Blue Start Button
Rev B, July 19, 2017 Page 15
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
7.7. Unloading the Fiber
To unload the fiber after cleaving:
1. If the thumbscrews were secured, turn them counter-clockwise until they disengage from the FHB base.
2. Hold the fiber securely and press down on the left-hand lifting lever to release the clamping force. The fiber
will be free to move after the lifting lever is lowered, so it is important to keep the fiber secured (the Vgroove extension is ideal for this).
3. Raise the left-hand FHB lid and carefully remove the cleaved fiber. Immediately the left FHB lid is opened,
the internal vacuum pump will turn on for approximately 15 seconds to assist in holding the fiber during the
unloading process.
4. Press down on the right-hand lifting lever to release the clamping force.
5. Raise the right-hand FHB lid and remove the cleave discard. Make sure to dispose of the cleave discard
properly as these shards can be very sharp.
6. Check that no debris is left behind in the FHB V-grooves or on the lid clamping surfaces.
After the vacuum turns off, the Tablet Controller displays a message with instructions to “Close FHB or Press Start
Button to Initiate Home Process.” Either action will trigger the homing routine, which re-sets the position of the lefthand FHB, the right-hand FHB if an angle cleave was performed, and the Cleave Blade.
The Reset may be initiated as soon as the cleaved fiber is removed using the Start Button – it is not necessary to
wait for the vacuum pump to time out.
If the Reset process is interrupted or fails, all system functionality is disabled to prevent possible damage to the
equipment. Remove any fibers and/or discards from the FHBs and cycle the power OFF then ON. The cleaver will
initialize and attempt to run the homing process again. If any further difficulty is experienced, contact
techsupport@thorlabs.com for assistance.
Figure 16 Removing a Cleaved Fiber from the Left Fiber Holding Block
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LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
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:
CAUTION
Do not change the top insert without a bottom insert in place, the top insert can get stuck in the lower
channel.
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 Page 17
Figure 17 Changing the Top Inserts
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
To change the bottom V-groove insert:
1. Loosen the set screws accessible from the front of the FHB base using the 0.035” hex key included in the
tool kit. Do NOT remove the set screws completely; one full turn counterclockwise 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. For vacuum V-groove inserts (VHD and VHF series), make sure
that the vacuum feed ports are clear of debris by holding the insert up to a light and checking from behind
to make sure light passes each of the ports. Clean if necessary.
3. 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 bottom 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. Re-tighten the set screws
until they are snug. Do NOT over tighten.
Figure 18 Changing the Bottom Inserts
It is important that both inserts in the FHBs fit together properly. It is better to have both inserts fitted loosely in the
FHBs, and secure them both at the same time:
1. With the lid of the FHB closed only on to the lid lever, but all grub screws that secure both top and bottom
inserts loose, the inserts should be free to move side to side.
2. Use a straight edge to set the ends of the inserts flush to one another on the side of the FHB that faces the
Cleave Blade. It may be useful to use an hex key to push from the other end to get the inserts up against
the straight edge.
3. When the inserts are set side to side, gently raise the lid lever to fully close the FHB Lid.
4. Secure the inserts with the grub screws.
Note: When using the VHF series lower inserts in the left FHB, the Top insert should be fitted differently, not such
that the top and bottom inserts are flush at the inside end. The top insert should be pushed back towards the left,
and 1-2mm clearance between this and the fitted Transfer Clamp allowed, so that the Transfer Clamp Lid may be
easily raised and lowered.
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LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
7.9. Specialty Cleave Process
Two additional process capabilities are available on these cleavers. These processes are primarily utilized for
specialty fiber cleaving such as microstructured fiber, highly stressed fibers (usually PM), or capillary tubing. The
specialty fiber processes are used to improve end face quality but require the execution of additional steps.
7.9.1. Subcritical Process
The Subcritical Process should be used in the following circumstances:
When cleaving microstructured fiber such as PCF (photonic crystal fiber) or PBF (photonic band gap fiber).
When cleaving capillary tubing whose wall thickness is less than 10% of its diameter.
When cleaving PM fiber that has a cladding more than 400 µm in diameter.
When angle cleaving multimode fiber or PM fiber.
When cleaving fiber with a cladding diameter of 800 µm or larger and a high-quality end face is required.
The Subcritical Process applies a tension that is lower than that required for a regular cleave. The blade then scribes
the fiber and the tension is incrementally increased to propagate the scribe and produce the cleave. Since the crack
is allowed to propagate relatively slowly with little driving force, a smoother cleave surface is produced. To activate
the Subcritical Process, open the Parameter Select screen, select the Sub-Critical Cleave Process parameter and
select Enable. When enabled, three additional parameter values must be specified. These parameters are ReTension Level, Post-Scribe Pause, and Re-Tension Pause. Please refer to Section 9.8 for a definition of these
Parameters. In addition to specifying these new parameter values, two existing parameter values may require
adjustment. These are Cleave Tension and Cleave Oscillation Counter (or Cleave Peck Cycles). Experimentation
will be required in order to set these parameters. A general rule is that the Cleave Tension should be lowered to
60% of the Auto Parameter value and the Cleave Oscillation Counter should be set at 30. Optimal settings for these
values are achieved when then the Cleave Blade will scribe the fiber in the last few oscillations without causing the
cleave to propagate immediately or the fiber to bow significantly. Please note: all Subcritical Process parameter
settings are VERY fiber dependent.
7.9.2. Micrometer Backstop
The Micrometer Backstop may be helpful in the following circumstances:
When cleaving large fiber (cladding greater than 800 µm in diameter) if the Cleave Blade appears to be
pushing the fiber forwards without cleaving it.
When Angle-cleaving multimode fiber that is more than 250 µm in diameter.
When cleaving capillary tubing.
When cleaving PM fiber.
When cleaving PCF or PBF.
Figure 19 The Micrometer Backstop Acting as a Backstop to a Fiber
Rev B, July 19, 2017 Page 19
LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
The Micrometer Backstop acts as a backing for the fiber during the Cleave Process. When using the Micrometer
Backstop, it is possible to reduce the tension applied to the fiber because the Micrometer Backstop will prevent the
fiber from flexing when struck by the blade to produce a longer initial scribe. The longer initial scribe causes the
fiber to cleave, despite the relatively low tension. Since the tension is lower, the crack propagates slowly with little
driving force, and a smoother cleave surface results. The Micrometer Backstop may be used in conjunction with the
“Subcritical Process” to produce cleaves with very good end face quality.
A general rule to follow when using the Micrometer Backstop is that the Cleave Tension should initially be lowered
to 85% of the Auto Parameter value that Tablet Controller recommends for the diameter of the part. Adjust the
tension based upon visual inspection of the end face. Increase the tension if there is no end face damage but the
cleave has an angle. Decrease the tension if there is end face damage but no angle. Do not go below 60% of the
Auto Parameter value or severe blade damage may result.
Figure 20 Using an Eye Loupe to Check that the Micrometer Backstop just Touches the Fiber
To use the Micrometer Backstop, load the fiber in to the unit in the normal way, but do not initiate a cleave
immediately. Rotate the micrometer until it just contacts the fiber. It is a good idea to use a 10X eye loupe to make
sure that the Micrometer Backstop just barely touches the fiber (see Figure 20). After the Micrometer Backstop is
set, initiate the cleave as per standard procedure. Be careful not to flex the fiber forwards, or the results will be
poorer than not using the micrometer at all!
After cleaving, back the micrometer away from the cleaved fiber prior to unloading. This will ensure that the fiber
does not contact the micrometer during unloading.
The following chart offers guidelines for when to use the Subcritical Process and the Micrometer Backstop.
Process Selection Chart
Fiber Type
Cladding <Ø800 µm
Cladding ≥Ø800 µm
Multimode
Thick-Walled
Capillary Tubing
Thin-Walled
Capillary Tubing
PM
PCF
2
3
Cleave
Type
Flat or
1
Angled
Flat or
1
Angled
Flat
Angled1 -
Flat or
1
Angled
Flat or
1
Angled
Flat
Angled -
Flat or Angled1 -
Standard
Process
- -
-
Use if Fiber Cladding is
≤Ø400 µm
SubCritical
Process
- -
May be Necessary
- -
Use if Fiber Cladding is
>Ø400 µm
Micrometer
Backstop
Use if the Blade is Pushing
the Fiber Forwards without
Cleaving
Use if Fiber Cladding is
>Ø400 µm
1
Only the LDC401A can be used to produce angled cleaves.
2
Wall thickness is at least 10% of the diameter.
3
Wall thickness is less than 10% of the diameter.
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LDC401 & LDC401A Automated Cleavers Chapter 8: Maintenance
Chapter 8 Maintenance
These cleavers are designed to provide trouble-free operation in a production environment provided that planned
maintenance is performed as described below.
Planned Maintenance Schedule
4
Inspect and clean the Fiber Holding Blocks every shift.
5
Inspect and clean the Cleave Blade every day.
Reposition the Cleave Blade as needed (roughly every month).
Replace Cleave Blade as needed (roughly every six months).
Return the unit to Vytran for recalibration as needed (roughly once a year).
8.1. Inspecting the Fiber Holding Blocks
The Fiber Holding Blocks (FHB’s) should be inspected daily for debris and/or damage that may prevent the lids
from closing properly and the fiber from being fully clamped. It is particularly important to make sure that the bottom
insert V-groove surfaces and the top insert clamping surfaces are free of debris and oils. This will help to ensure
that the fiber will not break or slip during tensioning. Remove debris using a nylon brush as shown below. Brush
from the inside to the outside of the unit as shown (away from the Cleave Blade) so as to avoid getting debris inside
the cleave assembly.
5
5
6
To remove oils from the inserts, use a cotton-tipped swab wetted with acetone or alcohol. Never do this while the
vacuum is turned on as the solvent will be sucked into the unit!
Figure 21 Removing Debris from the Fiber Holding Blocks and Oils from the Inserts
4
Maintenance operation can be performed by the operator.
5
Maintenance operation can only be performed by trained maintenance personnel.
6
Recalibration can only be performed by a Vytran-certified technician.
Rev B, July 19, 2017 Page 21
LDC401 & LDC401A Automated Cleavers Chapter 8: Maintenance
8.2. Inspecting the Cleave Blade
The diamond edge of the Cleave Blade should be inspected daily for debris and/or damage which may result in
sub-optimal cleave performance. For easier inspection and cleaning, the Blade Service tool may be selected from
the Tablet Controller tools (Section 9.5.4). This function will move the Cleave Blade to the forward (cleave) position.
Note: Before selecting Blade Service, make sure to remove any fiber or discard pieces from the FHBs to prevent
possible damage to the Cleave Blade and retract the Micrometer Backstop.
Figure 22 Cleaning the Cleave Blade
The Cleave Blade should be cleaned using a cotton-tipped swab wetted with acetone or isopropyl alcohol. Wipe
both sides of the blade in a back-to-front direction, towards and over the diamond edge, using very light pressure
only. Never touch the edge of the Cleave Blade with any hard or metal object. For very loose debris, the Cleave
Blade may also be cleaned by blowing clean (canned) air across the edge.
WARNING
Use great care when working near or handling the Cleave Blade, as the diamond tip is “knife edge”
sharp and can very easily cut through skin.
Note: Closing the Blade Service tool will return the Cleave Blade to its home position.
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LDC401 & LDC401A Automated Cleavers Chapter 8: Maintenance
8.3. Re-Positioning the Cleave Blade
Only a small portion of the Cleave Blade edge is used to scribe the fiber. If this local portion of the edge gets
damaged, the blade can be re-positioned to a new “un-used” section. While the lifetime of a given section of the
blade can be very long (greater than 5,000 cleaves), it is also very easy to damage the blade due to excessive
lateral stresses (stresses perpendicular to the edge of the blade). This can occur if the blade is in contact with the
fiber and the fiber then moves sideways across the edge of the blade. The most common occurrence of this is a
result of the Cleave Tension being set so low that the fiber is unable to be cleaved. In this scenario, the fiber will
slide along the edge of the blade and take a small semi-circular “bite” out of the current section. For small localized
damage such as this, the blade can be re-positioned approximately 9 times.
To re-position the Cleave Blade:
1. Locate the 3/32″ hex key provided with the tool kit.
2. Loosen the two (2) clamping screws located at the front of the Cleave Blade Housing; turning them counterclockwise by ¼ to ½ turn is sufficient.
3. Turn the height-adjustment screw exactly ¼ turn clockwise. This will raise the Cleave Blade Housing and
re-position the blade to a new section of the diamond edge.
4. Re-tighten the clamping screws. These should not be over-tightened.
Cleave Blade
Housing
Height
Adjustment
Screw
Clamping
Screws
Figure 23 Screws Used in Height Adjustment
After adjusting the height of the Cleave Blade, perform a cleave to ensure proper operation. Check to make sure
that the Cleave Blade has not been raised so many times that the contact point is right at the bottom edge of the
diamond blade, or that the diamond blade “misses” the fiber completely. If so, it is time to replace the Blade.
When cleaving, the blade performs an initial moves from its starting position to one that is close to, but not touching,
the fiber. The distance of this initial move consists of the Blade Offset + Pre-Cleave Advance. Ensure that the
Cleave Blade does not strike the fiber during the Blade Offset + Pre-Cleave Advance move, as this can easily
damage the new section of diamond blade. After the Blade Offset + Pre-Cleave Advance move, the blade should
oscillate for approximately 3 seconds prior to striking and cleaving the fiber. If incorrect, the Blade Offset must be
adjusted in the Tablet Controller. Every 10 step change in the Blade Offset will change the oscillation time by
approximately 1 second. Reduce the Blade Offset for longer oscillation times. In general, the Blade Offset is
modified to account for variation in the blade dimensions and or position of the blade, the Pre-Cleave Advance is
modified to account for fiber size (larger fibers being closer to the blade).
Rev B, July 19, 2017 Page 23
LDC401 & LDC401A Automated Cleavers Chapter 8: Maintenance
Figure 24 Adjusting the Height of the Cleave Blade
8.4. Replacing the Cleave Blade
If the Cleave Blade is sufficiently damaged along its edge such that it cannot be re-positioned to an “un-used”
section, then replacement is required. The entire Cleave Blade is replaced as a unit, and consists of the diamond
Blade tip which is permanently mounted to a stainless steel base with a round, reduced diameter shank.
WARNING
Use great care when working near or handling the Cleave Blade, as the diamond tip is “knife edge”
sharp and can very easily cut through skin.
To replace the Cleave Blade:
1. Remove any fiber or discard pieces from the FHB’s.
2. Remove the Micrometer Backstop by loosening the four socket head cap screws holding it in place (use
the 0.05″ hex key supplied with the unit).
Figure 25 Removing the Micrometer Backstop
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LDC401 & LDC401A Automated Cleavers Chapter 8: Maintenance
3. Select the Blade Service tool function in the Tablet Controller. This function will move the Cleave Blade
forward to the cleave position.
4. Loosen the set screw in the top of the Cleave Arm one full turn counter-clockwise, using the 0.035″ hex key
provided.
Set Screw
Cleave Arm
Figure 26 Set Screw and Cleave Arm
5. Insert the 0.035″ hex key through the access hole in the back of the Cleave Blade Housing and push the
Cleave Blade out of the Cleave Arm. Remove the Cleave Blade with tweezers.
Figure 27 Replacing the Cleave Blade
Rev B, July 19, 2017 Page 25
LDC401 & LDC401A Automated Cleavers Chapter 8: Maintenance
Note: If the Cleave Blade does not push out easily from the Cleave Arm, attempt to provide some support
to the front of the Cleave Arm to prevent it from rotating.
6. Select a new Cleave Blade and, with the protective plastic tube still in place over the front of the blade as
a handle, insert the shank of the blade as far as possible into the Cleave Arm.
7. Re-tighten the set screw until it is just snug and remove the protective tube from the front of the blade,
exposing the diamond tip.
8. Check to see if the stainless steel Cleave Blade base is fully seated against the Cleave Arm and that the
diamond blade is orientated perfectly vertically. If necessary, loosen the set screw and re-position the blade
using a pair of flat-tipped tweezers to rotate and seat the stainless steel base. Take great care not to
touch the blade edge with the tweezers or any other hard objects or it will get damaged.
WARNING
Use great care when working near or handling the Cleave Blade, as the diamond tip is “knife edge”
sharp and can very easily cut through skin.
9. Tighten the set screw and confirm the blade position.
10. Return the Cleave Blade assembly to the home position by selecting Home on the Blade Service screen
or by closing the Blade Service screen.
11. Re-attach the Micrometer Backstop assembly.
After replacing the Cleave Blade, the Cleave Blade Housing should be moved to its lowest position. This will drop
the Cleave Blade down so that the very top portion of the diamond blade will be the first section of the edge to be
used.
To lower the cleave assembly:
1. Locate the 3/32″ hex key provided with the tool kit.
2. Loosen the two clamping screws located at the front of the cleave block assembly; turning counterclockwise one full turn.
3. Turn the height-adjustment screw counter-clockwise until it disengages.
4. Push down on the Cleave Blade housing until it is full seated at its lowest position.
5. Re-tighten the clamping screws.
6. Turn the height-adjustment screw clockwise to re-engage, and, using very light force only, continue
tightening until resistance is felt. Do not use excessive force tightening the height-adjustment screw, or the
Cleave Blade housing will be pulled upwards.
After lowering the Cleave Blade Housing, perform a cleave to ensure proper operation of the equipment. Check to
make sure that the Cleave Blade is not so low that the contact point is right at the top corner of the diamond blade,
or that the diamond blade “misses” the fiber completely. If so, follow the instructions for Re-Positioning the Cleave
Blade in Section 8.3 above, and repeat until the top portion of the blade hits the fiber during a cleave. It is also
important to check the blade oscillation time after replacing the Cleave Blade. After the Blade Offset + Pre-Cleave
Advance move, the blade should oscillate for approximately 3 seconds prior to striking and cleaving the fiber. If
incorrect, the Blade Offset must be adjusted (in the Tablet Controller). Every 10 step change in the Blade Offset
will change the oscillation time by approximately 1 second. Increase the Blade Offset for shorter oscillation times.
8.5. Load Cell Calibration
The load cell calibration should be checked every year to ensure that accurate Cleave Tension is applied to the
fiber and that optimal cleave angle and end-face quality is achieved. This task must be performed by a Vytran
Thorlabs-certified technician.
Page 26 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Chapter 9 Controlling the LDC401 and LDC401A
The Tablet Controller provides a simple, easy to use interface for configuring, controlling and monitoring LDC401
series cleavers. The following sections contain a quick start guide followed by a more detailed view of the features
and capabilities of the Tablet Controller.
9.1. A Quick Start Guide to Cleaving with LDC401 and the Tablet Controller
Once the Tablet Controller has recognized an LDC401, the LDC Main Screen is displayed. From here the User can
start a cleave, view / edit Parameters, select items on the toolbar.
A: Status Bar
B: Tool Bar
C: Start Button
D: Parameter View / Edit
E: LDC Widget
Figure 28 LDC Main Screen
To start a cleave, press ‘Start’ (C). This performs the same action as pressing the blue ‘Start’ button on the LDC.
To view and or edit cleave Parameters, touch either the view/edit button (D) or the Cleave Widget (E). (If the
User has insufficient access permission to edit Parameters, a view only icon is displayed.)
The cleave parameters (along with the current value) will be shown on the Parameter Select screen. Swipe the list
to scroll up / down, touch a parameter to select it for editing.
Note: Yes, OK, Apply No, Cancel, Close
Rev B, July 19, 2017 Page 27
Figure 29 Parameter Select Screen
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
In the edit / viewing screen, touch the value to enable the On-Screen-Keyboard and edit the value. Touch or X to
return to the Parameter Select Screen.
Figure 30 Parameter Edit Screen
The parameter list indicates that an item has been changed by displaying a different icon .
The User must select
when leaving the Parameter Select Screen in order for all changes to be committed to the
LDC. Changing the FHB offset will require the motor to be re-homed after uploading. The controller will ask if it’s
“ok to home?”. Be sure that there is no fiber clamped in the machine or any other obstruction that may cause the
system to fail this move.
9.1.1. Cleave Screen
Once the cleave sequence has started (either by pressing ‘Start’ on the Tablet, on the LDC401 or by opening the
left FHB lid), the Cleave Screen is displayed. This screen updates dynamically as the cleave sequence progresses.
A typical sequence consists of loading the fiber, pulling tension, cleaving the fiber then unloading (although the user
can go straight to the tension stage by pressing start when the left FHB lid is closed).
Page 28 TTN100064-D02
Figure 31 Cleave Screen – Load Fiber
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Once the left FHB lid is closed, the user is given extra time to close the right FHB lid. Pressing ‘Start’ will advance
the LDC401 to the tension stage.
Figure 32 Cleave Screen – Extended Vacuum
The LDC401 will wait until the user is ready to start the cleave or repeat load fiber. Note that the user can return to
the LDC Main Screen at this point in order to modify parameters or access the toolbar.
Figure 33 Cleave Screen – Reload or Cleave
Cleave begins by tensioning fiber, displaying the measured tension.
Figure 34 Cleave Screen – Tension
Rev B, July 19, 2017 Page 29
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Once tension is reached, the Cleave Peck Indicator is also displayed.
Figure 35 Cleave Screen – Tension and Peck
When the fiber is cleaved, the tension will drop to zero and the Cleave Peck Indicator remains on screen. The LDC
will wait for the user to start unloading the fiber (raising the left FHB lid).
Figure 36 Cleave Screen – Cleave Complete
Page 30 TTN100064-D02
Figure 37 Cleave Screen – Unload
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Figure 38 Cleave Screen – Homing
Once homing is complete, the Tablet Controller indicates it is ready to start the next cleave.
Figure 39 Cleave Screen – Ready
The Tablet Controller remains in the Cleave Screen for the convenience of the user. In most instances, the LDC is
used in a repetitive manner with little or no need to access the toolbar or edit parameters between cleaves. To
access parameters or the toolbar, the user must close the Cleave Screen and return to the LDC Main Screen.
9.2. Tablet Controller Online
The Tablet Controller is a fully featured Windows 8 (and in due course, Windows 10) Tablet. The controller
application (VytranCX.exe) is launched automatically on Windows startup. After a few seconds of displaying a
master Home Screen, a discovery process is launched which detects any Vytran LDC / PTR modules connected.
If a module is found and recognized, the controller configures itself for that module, in this case the LDC401 /
LDC401A.
It is recommended that the Tablet Controller remains connected to a single machine in order to benefit from machine
status monitoring built into the controller. The LDC can, however, operate without the Tablet Controller attached,
and through use of the Start Button will carry out cleaves using the last set of parameters that were uploaded to it.
At startup, Tablet Controller will always read parameters from the LDC401 meaning that the parameters that appear
on the screen will always be the parameters that have been uploaded to the cleaver.
Rev B, July 19, 2017 Page 31
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
The Tablet Controller provides an ‘offline’ mode in which files can be modified and uploaded later.
9.2.1. LDC Main Screen
The LDC Main Screen, much like the Main Screen for any other Vytran PTR module, shares a common theme. It
has a status bar, one or more control (action) buttons, a view / edit button to access parameters related to that
control or action, a Widget (for displaying the most relevant current parameters) and a toolbar. During operation,
runtime messages are displayed.
From left to right, the status bar indicates the type of module detected (in this case LDC400), the file currently open
(blank if none) and three icons to indicate file status (unprotected or read-only), current user access status and USB
connection.
Figure 40 LDC Main Screen – Status Bar
The control button on the LDC Main Screen will perform the same function as the Start button on the LDC401,
invoking either a load or cleave operation depending on whether the left FHB lid is open or closed. The view / edit
button will bring up the Parameter Select list. Since LDC401 has only one functional button, all parameters will
appear in one single list. Note that touching the Widget on the main screen will also bring up the Parameter Select
list.
Figure 41 LDC Main Screen – Start Button and Parameter View/Edit
The Widget provides an instant overview of the most relevant current parameters. From top left to top right it shows:
Left FHB inserts
FHB Offset in mm
Cleave Blade index
Cleave counter
Right FHB inserts
Right FHB inserts
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LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Figure 42 LDC Main Screen – Cleave Widget
From bottom left to bottom right:
Target tension
Fiber cladding and jacket diameter
Micrometer Backstop position
Regular cleave/Sub-critical cleave
Ready/Busy indicator
Runtime messages are displayed on the LDC Home screen when something important is happening such as
reading parameters from the LDC and uploading new parameters to the machine.
Figure 43 LDC Main Screen – Toast Messagers
The toolbar provides access to Tablet Controller settings, the file system, LDC specific tools, a fast Log-Out feature
and a close button to allow the user to exit the LDC Main Screen.
Figure 44 LDC Main Screen – Toolbar
9.3. Settings
Touch the toolbar Settings button to bring up the Settings Screen. These options are for configuring the Tablet
Controller and are generally not PTR/LDC dependent.
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LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Figure 45 Toolbar – Settings Screen
From this screen the user can setup or enter a password, control user access permissions, enable or disable voice
notifications, select the user interface language, view and manage communication ports.
9.3.1. Password
With a password, users can protect the controller and its files from unauthorized access / modification.
Passwords are recoverable from a configuration xml file so can be retrieved if lost or forgotten. The controller
defaults to No Password, Full Permission enabled.
If a password has been setup and entered, the user can quickly log out using Log-Out from the toolbar.
A password is required (only if one has been set) to change Access Permissions. These permissions are the actual
mechanism for protecting files and parameters.
Figure 46 Toolbar – Password Screen
If no password has been setup yet, the password is effectively an empty string. Touch the password box and press
the enter key to continue. If a password has been setup, enter the password. Passwords can be any characters,
any length and are case sensitive. Whenever an incorrect password is entered, a message appears to inform the
user. The Password is in effect until the user touches Toolbar-Log-Out.
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LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Once the correct password has been entered (in this case 1234), it can be changed by touching the Change
Password text to continue.
Figure 47 Toolbar – Change Password Option
Touch the Enter New Password box and enter the new password, repeat in the confirmation box.
The password is in effect until the user touches Toolbar-Log-Out.
Figure 48 Toolbar – New Password Screen
9.3.2. Access Permissions
Tablet Controller can be setup to prevent unauthorized access of files and parameters which can be read-only or
read-write in any combination. In addition, files can be saved as read-only and can only be overwritten by a user
with Full Access Permission. Tablet Controller will warn the user when attempting to overwrite a read-only file.
Tablet Controller defaults to No Password, Full Permission enabled. A password is required (if one has been set)
to change Access Permissions.
Rev B, July 19, 2017 Page 35
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Figure 49 Toolbar – User Access Permissions Screen
The Access Permissions are self-explanatory except for Full Access Permission.
Full Access Permission allows full read-write access of parameters and files, the ability to change User Access
Permissions and the ability to overwrite a file that has been saved as read-only. If a read-only file contains an error,
it’s possible to correct it. If a password has been setup, the user must enter it before being allowed to change User
Access Permissions.
9.3.3. Voice Notifications
Enable audible notifications in spoken language when a process has begun and whether it completed successfully
or failed. Voice notifications will attempt to load an appropriate Text-To-Speech (TTS) voice for the current language
selection. This requires a suitable (TTS) Voice has been installed. Contact Thorlabs / Vytran for more details.
Figure 50 Toolbar – Voice Notifications (Current Language – English)
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LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Figure 51 Toolbar – Voice Notifications (Current Language – Chinese)
9.3.4. Language
The user can select the preferred user-interface language. Language selection is independent of computer locale
or computer language packs installed.
Complete translations are available in English, French and Russian and Chinese, more will be available in the
future. In the event that a piece of translated text is missing, the controller will default to English for that text. Future
translations are installed by simply copying a resource-only dll file into a sub-folder of VytranCX controller.
Figure 52 Toolbar – Language Selection
Rev B, July 19, 2017 Page 37
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Figure 53 LDC Parameters Select in Russian
9.3.5. Comm Ports
The Comm Ports screen lists all communications ports detected by Tablet Controller which can be useful when
fault-finding a missing connection. Tablet Controller will normally auto-detect the correct USB serial Comm Port to
communicate with the LDC.
9.4. Files
Files are opened, saved or saved-as from Toolbar-File. The user is presented with those options. Note that if no file
is open, selecting Save File will open the Save File As screen and the current machine parameters will be saved to
the file specified. Open File and Save File As will open a file selection screen.
Figure 54 Toolbar – File Options Screen0.
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LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
9.4.1. Open File
Figure 55 Toolbar – File Open Screen
In both File Open and Save File As screens, the existing files are listed in order of Most Recently Used (MRU). Any
file that has been saved as a read-only file will display the small lock symbol next to the file name.
Only files specific to a particular type of Vytran equipment are displayed in the list. E.g., if the User is working with
an LDC-400, only LDC-400 files are accessible. Each machine type has its own dedicated folder and files can only
be saved in that folder.
Touch the file in the list to select to it for opening. Swipe the list to scroll up or down.
9.4.2. Save File As
Figure 56 "Save File As" Screen
To select an existing file to overwrite, select it by touching it in the list. Alternatively, type in a filename to create a
new file. Files can be saved as read-only. A read-only file can be overwritten but only if the user has Full Access
Permission. It might at first seem strange to be able to overwrite a read-only file, consider how frustrating it would
be if files contained errors that were impossible to correct. The current machine parameters can always be saved
to file using Save File As.
Note: There is no File Save screen. File Save instantly saves the current open file to disk.
Rev B, July 19, 2017 Page 39
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
9.5. Tools
Each Vytran machine type has its own suite of tools, designed to simplify certain tasks. Some of the tools are
common to multiple machine types, others are unique to just one. Touching Toolbar – Tools brings up the Tool
Selection Screen.
Figure 57 Toolbar – Tool Selection Screen
The set of tools currently available include:
Terminal Client (direct command language communication with LDC401)
Motor Manipulation Tools (FHB, Cleave Blade, Rotation)
Auto Parameter (recommendation of best theoretical parameter values for a given fiber / cleave angle)
Blade Service T Insert Selector (automatic selection tool based on the insert selection guide tables given
in Section 10.1)
9.5.1. Terminal
The Terminal Screen provides a box (top left) where a command can be entered for transmission. Below that is a
list of the most recent commands sent. Touch a command in the list to select it for re-transmission. On the right is
the received communications traffic.
Terminal is available for all module types (LDC, PTR-200 etc.)
Page 40 TTN100064-D02
Figure 58 Tools – Terminal Screen
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
9.5.2. Motor Control
The Motor Control window initially allows the user to select which motor to manipulate. On LDC401, these are left
FHB, Cleave Blade and right rotation. On selecting one of these options, a generic motor control window opens.
Figure 59 Tools – Motor Control (Select)
The Motor Control window provides a numeric window where the user can type in the desired motor position. After
pressing Enter, the move is initiated. Below is a slider control that displays both target position and current position.
The user can also touch and slide the slider button to move the motor. Below the slider are individual buttons for
small step manipulation in either direction and a stop button.
In the case of the left FHB, the user is given a checkbox option to apply the current position to the FHB offset. When
used to control the Cleave Blade motor, the user can optionally apply the position to the Pre-Cleave Advance
parameter.
Figure 60 Tools – Motor Control (FHB)
9.5.3. Auto Parameter
Auto Parameter will generate a basic set of suggested theoretical values based on Fiber Diameter (and if required,
Desired Cleave Angle). The user can touch the tick to use the suggested parameters. Touching any parameter in
the list on the right will bring up the Parameter View/Edit Screen, allowing fast access to modify that parameter
(provided the user has sufficient Access Permissions).
Rev B, July 19, 2017 Page 41
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Note that distance between FHBs refers to the ‘Clamping Distance’ and the Fiber Modulus is its Young’s Modulus
of Elasticity - typically 28 for SMF28. However for softer glass, 28 will be too high, and you should look up the
modulus of rigidity. A smaller number should also be used for photonic crystal fiber (PCF). The modulus of rigidity
of silica glass varies from 19 to 31 GPa.
Figure 61 Tools – Auto Parameter
9.5.4. Blade Service
Blade Service provides a window that allows the user to move the blade between its Service Position and its Home
Position. The list on the right gives quick access to the parameters needed to manage blade setup. Touch an item
in the list to edit (provided the user has sufficient Access Permissions).
When the blade is in its Service Position, the ‘Home’ button is displayed, when the blade is in the Home Position,
the ‘Service Position’ button is displayed.
Whenever the user physically advances the registration of the Cleave Blade (to use a new part of the diamond
blade), the index should also be incremented and the Cleave Counter reset to zero.
Figure 62 Tools – Blade Service
9.5.5. Insert Selector
The Insert Selection Tool provides the same functionality as the lookup tables provided in Chapter 13.1. Specifying
the Coating (jacket) and Fiber (cladding) diameter provides a list of possible FHB insert combinations in order of
preference (best choice at the top). The offset values are also given so the user can best match left and right inserts
when a complete set is not available.
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LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Figure 63 Tools – Insert Selector
9.6. Log Out
When the user enters a password, the user is considered ‘logged in’ with full access permission. The Log Out button
provides a quick method of returning to the normal access permission level. If no password has been setup, the
Toolbar-Log Out button is permanently greyed. If a password has been setup, the Toolbar-Log Out button is enabled
whenever the user has ‘logged in’ by entering the password.
9.7. Exit/Close
In the default Home Screen, the final toolbar button displays Exit. This will close the Application. When the Tablet
is connected to a Vytran module, the button displays Close, this allows the user to return to the default Main Screen
so the Tablet can be connected to a different Vytran module.
9.8. Parameter Description
LDC401 / LDC401A are designed to provide easy operation when performing simple cleaves but still support
customized processing for more complicated cleaves involving specialty fibers. A complete list of modifiable
parameters is listed below. The majority of users will only need to enter the Fiber Diameter (cladding), Cleave
Tension, and Pre-Cleave Advance while leaving the rest of the parameters set to their default values.
Parameter Description
Fiber Diameter
Cleave Tension
(grams)
Cleave Rotation
Angle
(degrees,
LDC401A Only)
The diameter of the fiber cladding to be cleaved. Other recommended values are
derived from this.
This parameter is the load, in grams, applied axially to the fiber prior to initiating the
scribe. The Tablet Controller provides manual and Auto Parameter options for
setting the Cleave Tension. The optimal Cleave Tension depends on the cross
sectional area of the fiber and its material properties. The Auto Parameter option will
provide the appropriate Cleave Tension for silica fibers based on the Fiber Diameter
currently specified in the file. These cleavers are calibrated using standard weights;
the Cleave Tension settings are programmed into the Tablet Controller in grams.
Possible settings correspond to a range of tensions from 9.8 mN (0.0022 lbs) to
63.7 N (14.3 lbs).
This parameter is the Rotation Angle, in degrees, applied by the right side FHB prior
to initiating the Tension Process. The optimal Rotation Angle for a specific resultant
angled cleave is dependent upon the cross sectional area of the fiber, material
properties of the glass, and the tension applied. The Tablet Controller has an Auto
Parameter function to estimate this value for a user specified target Angle. See
Section 9.5.3 for more information. Set the Rotation Angle to 0° for a perpendicular
cleave.
Rev B, July 19, 2017 Page 43
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Pre-Cleave Advance + Blade Offset = the distance that the blade moves towards the
fiber before entering the oscillation phase of its movement. The Tablet Controller
Pre-Cleave Advance
(Steps)
provides both manual and Auto Parameter options for setting the Pre-Cleave
Advance. The ideal Pre-Cleave Advance is dependent upon the fiber diameter, and
must be reduced as the fiber diameter increases. One step corresponds to
0.00006" (1.5 µm). See sections 8.3 and 8.4 for more information regarding
Pre-Cleave Advance and Blade Offset.
This parameter is the distance to the left that the left Fiber Holding Block will move
FHB Offset
after homing (measured in millimeters). Increase this parameter if you want to hold
the fiber farther from the cleave point. This will effectively give a longer cleave where
Transfer Clamps are used.
This parameter is the velocity (in steps per second) of the motor tensioning the fiber
Tension Velocity
(Steps/sec)
prior to the Scribe Process. Typically, this value is set to 60 steps per second. Lower
tension velocities may be beneficial when the Sub-critical specialty process is
enabled. One step corresponds to 0.00003125" (0.8 µm).
Cleave Oscillation
Counter (Cleave
Peck Cycles)
This parameter is the maximum number of oscillations that the Cleave Blade will
attempt during the Scribe Process. Because the Cleave Blade advances towards the
fiber on each oscillation, this value will determine the maximum total distance that the
blade can advance during the scribe. The default is 60.
This parameter is the distance, in steps, that the Cleave Blade moves toward the fiber
Cleave Forward
Steps
during each blade oscillation. Typically, this parameter is set to 81 steps. Increasing
this parameter (and correspondingly the “Cleave Reverse Steps” parameter) may be
beneficial for the “Micrometer Backstop” specialty process. The “Cleave Forward
Steps” parameter must always be greater than the “Cleave Reverse Steps” parameter
for the blade to oscillate toward the fiber. One step corresponds to 0.00006" (1.5 µm).
This parameter is the distance, in steps, that the Cleave Blade moves away from the
fiber during each blade oscillation. Typically, this parameter is set to 80 steps.
Cleave Reverse
Steps
Increasing this parameter (and correspondingly the “Cleave Forward Steps”
parameter) may be beneficial for the “Micrometer Backstop” specialty process. The
“Cleave Reverse Steps” parameter must always be less than the “Cleave Forward
Steps” parameter for the blade to oscillate toward the fiber. One step corresponds to
0.00006" (1.5 µm).
This parameter is the delay, in milliseconds, between each of the Cleave Blade
oscillations. Typically, the scribe delay is set to 250 ms. Larger fibers benefit from
Scribe Delay (ms)
larger Scribe Delays. A safe ‘rule of thumb’, is to set Scribe Delay in ms, to the same
value as the Fiber Diameter in µm. Increasing the scribe delay may also be beneficial
for the subcritical and the Micrometer Backstop specialty processes.
Blade Offset is used in Cleave Blade setup and is modified to account for variation in
the blade dimensions and or position of the blade. Pre-Cleave Advance + Blade
Blade Offset
Offset = the distance that the blade moves towards the fiber before entering the
oscillation phase of its movement. See sections 8.3 and 8.4 for more information
regarding Pre-Cleave Advance and Blade Offset.
Sub-critical Cleave
Desired Cleave
Angle
This parameter is used to enable or disable the Sub-critical cleaving process. When
disabled, the LDC will perform a regular ‘tension-and-scribe’ cleave.
This parameter is used by the Auto Parameter tool to calculate the angular rotation
required to achieve the desired angle.
This parameter can be set by the user to indicate the number of times the Cleave
Cleave Blade Index
Blade height has been adjusted (see section 8.3). Typically, each blade can be
positioned to use a new section of the diamond blade ~ 10 times.
Cleave Counter
This parameter is incremented by Tablet Controller after each cleave. The user
should reset the counter value to zero after replacing/repositioning the blade height.
Four Insert Size parameters are stored, left hand side upper, left hand side lower,
right hand side upper, right hand side lower. The insert sizes can be selected using
Insert Size
the Insert Selection Tool or modified from the Parameter Select Screen where
touching one of the four parameters brings up a list of possible insert sizes. The insert
sizes are displayed in the Cleave Widget.
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LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
Coating Diameter
This parameter is used by the Insert Selection Tool to determine the optimum insert
choice for the left FHB. The coating diameter is also displayed in the Cleave Widget.
Backstop Position is displayed in the Cleave Widget and provides a visual clue that
Backstop Position
the backstop should be set and its approximate value. A value of 7mm is typically
considered to mean ‘unused’.
The following Parameters are required by the sub-critical process.
Parameter Description
This parameter is the additional load, in grams, applied axially to the fiber after the
Post-Scribe Pause and after successive Re-Tension Pauses. The optimal Re-
Re-Tension Level
(grams)
Re-Tension Limit
Post-Scribe Pause
(seconds)
Re-Tension Pause
(seconds)
Tension Level setting is dependent upon the effective cross sectional area, material
properties and type of fiber as well as scribe size. Experimentation will be required to
optimize the Re-tension Level, but it will typically be less than 50 grams. The settings
are programmed into the Tablet Controller in grams. Possible settings correspond to
a range of tensions from 9.8 mN (0.0022 lbs) to 0.98 N (0.22 lbs).
This parameter is the percentage of original (starting) tension that will be added to
the original (starting) tension after the Post-scribe Pause through all the successive
re-tensioning steps.
This parameter is the pause, in seconds, between the last blade oscillation and the
first re-tension. Typically, the Post-Scribe Pause is set to 1-3 seconds. This is enough
time for the scribe to propagate and cleave the fiber if the scribe was too large.
This parameter is the pause in seconds between each re-tension. The optimal Re-
Tension Pause is dependent upon the effective cross sectional area, material
properties and type of fiber as well as scribe size. Experimentation will be required to
optimize the Re-Tension Pause.
9.9. Parameter Limit
Minimum and maximum Parameter values permitted by the Tablet Controller are given below.
Parameter Default Min Max
Fiber Diameter
Cleave Tension7
Pre-Cleave Advance
FHB Offset
Tension Velocity
Cleave Rotation Angle
(LDC401A Only)
Cleave Oscillation Counter
Cleave Forward Steps
Cleave Reverse Steps
Scribe Delay
Set Blade Offset
Sub-Critical Process Parameters
Re-Tension Level (grams)
Post-Scribe Pause (seconds)
Re-Tension Pause
Re-Tension Limit8
Fiber Size Dependent 10 μm 1500 μm
Fiber Size Dependent 1 g 6500 g
Fiber Size Dependent 200 Steps 400 Steps
0 mm 0 mm 47 mm
60 Steps/s 4 Steps/s 200 Steps/s
0° 0° 180°
60 10 250
81 40 400
80 39 399
250 ms 1 ms 5000 ms
Unit Specific Value 100 Steps 2500 Steps
10 g 1 g 100 g
1.0 s 0.1 s 30.0 s
1.0 s 0.1 s 30.0 s
20% of Cleave Tension 1% of Cleave Tension 50% of Cleave Tension
7
These Cleavers are calibrated using standard weights, so the tension settings are programmed into the Tablet Controller in grams. This
corresponds to a range of tensions from 9.8 mN (0.0022 lbs) to 63.7 N (14.3 lbs).
8
These Cleavers are calibrated using standards weights so the tension settings are programmed into the Tablet Controller in grams. This
corresponds to a range of tensions from 9.8 mN (0.0022 lbs) to 0.98 N (0.22 lbs).
Rev B, July 19, 2017 Page 45
LDC401 & LDC401A Automated Cleavers Chapter 9: Controlling the LDC401 and LDC401A
9.10. Setup Tips – Cleaving a New Fiber
The Tablet Controller comes configured with a number of default files and these may be adapted or reconfigured
as necessary to meet your requirements. If a fiber of different dimensions is to be cleaved for the first time, the
following procedure will get the system setup in the right way to give a good starting point.
1. Use the Insert Selection tool in Tablet Controller to choose appropriately sized inserts for the dimensions
of the fiber and fit these in accordance with the Instructions in section 7.8.
2. Use the Auto Parameter tool in Tablet Controller to get the recommended Cleave Tension, Pre-Cleave
Advance and Scribe Delay. Touching the tick will upload the Parameters to the LDC401.
3. Prepare the fiber and load it to the machine.
4. Start the cleave and observe the blade. Make sure that the blade completes its fast move forward (Blade
Offset + Pre-Cleave Advance) before it goes in to the oscillation phase. If it strikes the fiber before it starts
to oscillate, raise the RHS FHB Lid immediately to prevent damage to the blade, then check that Blade
Offset is correctly setup (are different sized fibers cleaved properly when using the recommended Pre-
Cleave Advance? If yes, adjust Pre-Cleave Advance, if not, adjust Blade Offset). In some cases it may
be necessary to adjust Pre-Cleave Advance from that recommended by the machine to prevent the fiber
being struck by the blade in this way, but typically this is not necessary.
5. If the blade strikes the fiber a number of times but otherwise the process proceeds normally, it may be
necessary either to use the Micrometer Backstop ( if the fiber is large - 800µm and up ), or simply increase
Cleave Tension, but speciality fibers require careful treatment as dealt with in other sections of this manual.
6. From the toolbar, touch File, Save As to save the parameters to file.
With ‘regular’ silica based fibers this procedure can get good results immediately, but more speciality fibers may
require further work and the application of more advanced techniques. Technical assistance is available from Vytran
Thorlabs.
If one is available, it is useful to observe the end face of the fiber with an Interferometer if developing a new process.
Page 46 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 10: Accessories
Chapter 10 Accessories
These Cleavers comes in two basic unit configurations:
LDC401: Produce flat cleaves in fiber with a cladding between Ø80 µm and Ø1.25 mm.
LDC401A: Produce flat or angled cleaves in fiber with a cladding between Ø80 µm and Ø1.25 mm.
The following accessories are available separately for use with the Cleavers:
Fiber Holder Top Inserts (Two Required)
Fiber Holder Bottom Inserts (Two Required)
VHT1 Transfer Clamp (Optional, Compatible with VHF Series of Bottom Inserts)
Graphite V-Grooves (Required when Using Fibers ≥Ø550 µm VHF Series of Bottom Inserts)
10.1. Fiber Holder Inserts
Fiber Holder Inserts, which are designed to hold various sized fibers within the Cleaver, must be purchased
separately. The Bottom Inserts have V-grooves to hold the fiber, while the Top Inserts each feature a recessed, flat
surface that clamps the fiber against the V-groove in the Bottom Insert. Each top and Bottom Insert is sold
individually, as the fiber diameter clamped by the left and right holding blocks may not be the same. Two Top Inserts
and two Bottom Inserts are required to operate the Cleaver. Available Inserts are described below, and the Insert
Selection Guide in Section 10.1 should be used to select the appropriate Inserts for each holding block.
Top Inserts
The table below summarizes the top Fiber Holder Inserts that are available from Thorlabs.
Item #
VHA00
VHA05
VHA10
VHA15
VHA20
VHA25
VHA30
Bottom Inserts
Bottom Inserts are available in three varieties:
The VHD Series of Fiber Holder Inserts are single-sided, have holes for vacuum suction that aid in
positioning small fibers, and can accommodate fiber sizes up to Ø1.047 mm.
The VHF Series of Fiber Holder Transfer Inserts are designed to work with the VHT1 Transfer Clamps that
aid in moving the fiber between compatible Vytran stations while maintaining coarse alignment. They are
also single-sided and have holes for vacuum suction that aid in positioning small fibers.
The VHE Series of Fiber Holder Inserts are for fibers with claddings >Ø773 µm. They maybe single- or
dual-sided.
Typically, the Transfer Inserts are only be used in the left Fiber Holding Block, as the right Fiber Holding Block
usually clamps the side of the fiber that will be discarded. The right Fiber Holding Block of the LDC401 can accept
Side 1 Min/Max
Accepted Diameter
57 µm / 759 µm
410 µm / 1008 µm 560 µm / 1269 µm
812 µm / 1515 µm 1036 µm / 1770 µm
1288 µm / 2022 µm 1534 µm / 2268 µm
1772 µm / 2505 µm 2032 µm / 2944 µm
2278 µm / 3029 µm N/A
2609 µm / 3198 µm N/A
9
275 µm / 970 µm
Side 2 Min/Max
Accepted Diameter
9
This side of the VHA00 is flat to provide additional clamping force for fibers with very small diameters.
Rev B, July 19, 2017 Page 47
LDC401 & LDC401A Automated Cleavers Chapter 10: Accessories
Transfer Inserts, if desired, while the right Fiber Holding Block of the LDC401A is incompatible with the Transfer
Inserts, due to the presence of the Rotation Stage.
Item #
VHD080
VHD125
VHD160
VHF160
VHD250
VHF250
VHD400
VHF400
VHD500
VHF500
VHD750
VHF750
VHE10
VHE15
VHE20
VHE25
VHE30
Insert Selection Guide
The table on the following page indicates the maximum and minimum diameters that can be accommodated by
different combinations of Top and Bottom Inserts. It also indicates how far offset the fiber will be for recommended
combinations of Top and Bottom Inserts. Note that the fiber outer diameter may be the fiber cladding, jacket, or
buffer. If one side of the fiber is being discarded, it is preferable to clamp onto the cladding of this section except in
special cases (such as non-circular fiber) where the coating or buffer may be preferable. Sections of fiber that are
not being discarded should always be clamped on the coating or buffer in order to avoid damaging the glass. This
may require different sets of fiber holder Inserts to be used in the left and right holding blocks. In this case, it is
important to minimize the difference in the offsets introduced by the left and right sets of Inserts when attempting to
produce perpendicular, flat cleaves.
Transfer
Insert
No 57 µm / 100 µm N/A Yes
No 88 µm / 161 µm N/A Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No 773 µm / 1271 µm 1034 µm / 1523 µm No
No 1280 µm / 1769 µm 1534 µm / 2007 µm No
No 1787 µm / 2267 µm 2033 µm / 2513 µm No
No 2270 µm / 2844 µm N/A No
No 2692 µm / 3198 µm N/A No
Side 1 Min/Max
Accepted Diameter
112 µm / 208 µm N/A Yes
177 µm / 320 µm N/A Yes
279 µm / 519 µm N/A Yes
346 µm / 795 µm N/A Yes
516 µm / 1047 µm N/A Yes
Side 2 Min/Max
Accepted Diameter
Vacuum
Holes
Page 48 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 10: Accessories
V
V
V
V
V
V
V
V
V
V
V
V
Top Insert Item #
Accepted Diameter
(Nominal)
Bottom
Insert Item
#
VHD08011 80 µm
VHD12511 125 µm
HD16011
or
VHF160
HD250
or
VHF250
HD40011
or
VHF400
HD50011
or
VHF500
HD75011
or
VHF750
VHE1010
VHE1510
VHE2010
VHE25 2500 µm
VHE30 3000 µm
Accepted
Diameter
(Nominal)
160 µm
11,12
11
250 µm
11,12
400 µm
11,12
500 µm
11,12
750 µm
11,12
1000 µm
1250 µm
1500 µm
1750 µm
2000 µm
2250 µm
57/100
-23/21
88/161
-37/36
112/208
-49/48
177/320
-73/69
279/519
122/119
346/592
-153/93
516/759
-234/9
Best Fit
HA0010
≤320
400 µm 500 µm 750 µm 1000 µm 1250 µm 1500 µm 1750 µm 2000 µm 2250 µm 2500 µm 3000 µm
µm
- - - - - - - - - - -
275/323
25/74
377/517
-
-23/117
447/647
-53/147
617/970
-
132/221
- -
- - -
- - - -
- - - - -
- - - - - -
- - - - - - -
- - - - - - - -
- - - - - - - - -
HA0510
- - - - - - - - - -
410/519
-9/119
476/711
-24/211
643/878
-107/128
773/1008
-172/63
- - - - - - - - -
560/795
61/296
728/963
-23/213
858/1093
-88/147
1034/1269
-176/59
812/1047
62/297
943/1178
-3/232
1119/1354
-91/144
1280/1515
-172/63
Fiber Holder Insert Selection Chart
10
HA10
Min/Max Accepted Diameter (µm)
Min/Max Offset (µm)
- - - - - - - -
- - - - - - -
1036/1271
90/325
1212/1447
2/237
1373/1608
-79/156
1534/1770
-159/76
1288/1523
78/313
1449/1684
-2/233
1611/1846
-83/152
1787/2022
-171/64
10
HA15
- - - - - -
- - - - -
1534/1769
82/314
1695/1930
2/237
1871/2106
-86/149
2033/2268
-167/68
HA2010
- - - -
1772/2007
78/313
1947/2183
-10/225
2109/2344
-91/144
2270/2505
-172/64
- - -
2032/2267
74/309
2193/2429
-6/229
2355/2590
-87/148
2692/2944
-256/-4
Legend
Second Best Fit
Try these options if the best fit does not
incorporate your fiber sizes.
Try these options if the other two categories do not
Third Best Fit
incorporate your fiber sizes.
10
HA25
- -
2278/2513
78/313
2439/2675
-2/233
2777/3029
-171/81
HA30
-
2609/2844
167/402
2946/3198
-2/250
10
Figure 64 Each Insert Can Hold a Range of Fiber Sizes
Here are instructions for using the charts on the previous page.
1. First, select the Bottom Insert that matches your fiber size most closely.
Example: For an Ø800 µm fiber, the VHD750 insert is the closest match, since it is only 50 µm smaller.
2. On the chart below, look to the right of your chosen Bottom Insert. Select a compatible Top Insert
based on the fiber diameter size range shown in each cell.
10
These Inserts have two grooves, one on each side, that each accommodate a different range of fiber sizes, except for the VHA00, which
has a flat surface on one side that can be used to clamp the smallest fiber sizes.
11
These Bottom Inserts have vacuum holes to aid in aligning small fibers when used with the large-diameter fiber Cleavers.
12
These are transfer Inserts. When used with the VHT1 Transfer Clamp, they allow the fiber to be transferred between compatible stripping,
cleaning, Cleaving, splicing, and tapering stations without losing registration of the fiber tip location relative to the edges of the fiber holding
block.
Rev B, July 19, 2017 Page 49
LDC401 & LDC401A Automated Cleavers Chapter 10: Accessories
Example: For the Ø800 µm example fiber from step 1, the green cell is in the 750 µm groove column for
the VHA05 Top Insert which has two grooves. The numbers listed in the green cell indicate that this
combination of Inserts is good for fibers from 728 to 963 µm in diameter. Our Ø800 µm fiber is within this
range, so this is a good choice. There are several other options as well that will accommodate an Ø800 µm
fiber as well, but the green shading in the chart indicates that the 750 µm groove in the VHA05 provides
the best fit.
3. The second line of numbers in each cell shows the range of offsets that can be expected for any
given combination of top and Bottom Inserts. When selecting Inserts for the right and left Fiber
Holding Blocks, try to minimize the offsets between the pairs of Inserts on each side.
Example: If we choose a VHD750 Bottom Insert and the Ø750 µm groove in the VHA05 Top Insert, we
can use fiber as small as 728 µm, in which case the center of the fiber would sit 23 µm below the surface
of the Bottom Insert. We could also clamp a fiber as large as 963 µm, in which case the center of the fiber
would sit 213 µm above the surface of the Bottom Insert. We could interpolate to find the offset experienced
by our hypothetical 800 µm fiber, but it turns out that in a 60° V-groove, the offset is equal to the diameter
difference. So in our example, that means that the center of our fiber is going to sit 50 µm above the Bottom
Insert surface, since it is 50 µm larger than the fiber that the Bottom Insert was designed for (800 - 750 =
50).
4. Holding blocks designed for fibers less than Ø1000 µm have vacuum holes, designed to aid in
aligning small fiber within the groove, while Bottom Inserts for fibers of Ø1000 µm or larger do not
have these holes.
The LDC401 and LDC401A each have a Vacuum Pump that provides a small holding force via these holes,
keeping small fibers in place as the clamps are lowered. Inserts with vacuum holes are indicated by a
superscript "b" in the Fiber Holder Insert Selection Chart.
VHT1 Transfer Clamp and Graphite V-Grooves
The Fiber Holder Transfer Bottom Inserts are designed to be used with the VHT1 Transfer Clamp to allow small
fibers to be easily transferred between compatible Vytran systems while maintaining rough alignment of the fiber
tip location relative to the edges of the Fiber Holding Blocks. Compatible systems are:
LDC401 Cleaving Stations
FPS300 Cleaning and Stripping Station
LFS4100 Splicer
GPX3400 and GPX3600 Glass Fiber Processing Stations
The LFS4100 splicer and GPX series of glass processing stations require extra support for the fiber tips close to
the heating filament for fibers with cladding diameters ≤550 µm. For this purpose, Thorlabs offers graphite tips with
V-grooves that can be installed in the transfer Inserts. Available graphite tips are outlined in the table below.
Item # Accepted Diameter (Min / Max)
VHG125L
VHG200
VHG250
VHG300
VHG350
VHG400
VHG450
VHG500
VHG550
80 µm / 125 µm
150 µm / 200 µm
200 µm / 250 µm
250 µm / 300 µm
300 µm / 350 µm
350 µm / 400 µm
400 µm / 450 µm
450 µm / 500 µm
500 µm / 550 µm
Page 50 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 11: Specifications
Chapter 11 Specifications
Item # LDC401 LDC401A
Cleave Type
Accepted Fiber Sizes
Accepted Fiber Types
Cleave Method
Cleave Tolerance
Rotation Stage
Loading
Tension
Scribe
Fiber Holding Blocks
V-Groove Inserts
Power
External Power Supply
Dimension (L x W x H)
without Holding Blocks or
Rotation Stage
Dimensions (L x W x H)
Photonic Crystal Fiber (PCF) and Non-Circular Fiber, Capillary Tubes
(257.4 mm x 134.6 mm x 173.3 mm)
Flat Cleave
Cladding: Ø80 µm to Ø1.25 mm
Buffer: Ø80 µm to Ø3.198 mm
SM, PM, MM, Specialty Fibers Including
Tension and Scribe
±0.5°
N/A
Linear Tension, Stepper Motor Controlled
63.7 N (14.3 lbs) Max, Programmable
Diamond Blade, Stepper Motor Controlled
Internal Vacuum Pump for Easier Loading,
Up to 9 inHg (4.4 psi) of Pressure
Available Separately Below
12.5 VDC, 5 A (Provided by External Power Supply)
100 - 120 / 200 - 240 VAC, 4.5 / 2.2 A, 47 - 63 Hz
10.14" x 5.30" x 5.15"
(257.4 mm x 134.6 mm x 130.7 mm)
10.14" x 5.30" x 6.82"
Weight
Angled
Stepper Motor Controlled
(257.4 mm x 134.6 mm x 176.8 mm)
10.0 lbs (4.5 kg)
Flat Cleave
13
Cleave up to 15°
±0.5° (Flat)
±1.0° (Angled)
0.1° Resolution,
14
10.14" x 5.30" x 6.96"
13
It may not be possible to create clean angled cleaves in specialty fibers with large "air-fill" fractions due to the structural properties of the
fiber.
14
These Cleavers are calibrated using standard weights, so the tension settings are programmed into the Tablet Controller in grams. This
maximum tension corresponds to 6.5 kg.
Rev B, July 19, 2017 Page 51
LDC401 & LDC401A Automated Cleavers Chapter 12: Servicing and Troubleshooting
Chapter 12 Servicing and Troubleshooting
12.1. Packaging
Note: Please keep the original packaging and pink anti-static bag that the unit came in. Reuse it if your system
needs to be returned to Thorlabs for service or evaluation.The illustrations below show the correct way to re-pack
the LDC401 or LDC401A. Please ensure that the bottom of the box is taped securely before re-packing the unit. If
returning a malfunctioning unit for repair, we ask that you return the accessories with the unit in case one of the
accessories happens to be the source of the problems.
Figure 65 Foam Support
Figure 66 Last Sheet of Foam Goes on Top
Page 52 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 12: Servicing and Troubleshooting
12.2. Frequently Asked Questions
Q: What is the micrometer used for?
The Micrometer Backstop process is primarily used for cleaving highly stressed (MM and PM) fibers and capillary
tubing. The Micrometer Backstop process utilizes a support or “backing” applied to the fiber during the fiber loading.
Similar to the Subcritical Process, a tension lower than that required to cleave is applied and the blade scribes the
fiber. The Micrometer Backstop enables the use of a lowered Cleave Tension while improving the end face quality.
A general rule is that the Cleave Tension should initially be lowered to 85% of the Auto Parameter value. Adjust
the tension based upon visual inspection of the end face. If there is no end face damage but the cleave has an
angle, increase tension. Decrease tension if there is end face damage but no angle. Do not go below 60% of the
Auto Parameter value. Severe blade damage may result. To use the Micrometer Backstop load the fiber in the left
FHB. Rotate the micrometer until it just contacts the fiber. Close the right FHB. Initiate the cleave as per standard
procedure. After cleaving, back the micrometer away from the cleaved fiber prior to unloading. This will ensure that
the fiber does not contact the micrometer during unloading. For more information, refer to the Process Selection
Chart in Section 7.9.2.
Q: How many cleaves per Blade?
With proper parameters, typical blade life is about 5,000 cleaves per position, with ~10 positions per Blade.
Q: How do I cleave Photonic Crystal Fiber?
The Subcritical Process is primarily used for cleaving microstructure fiber. The Subcritical Process applies a tension
that is lower than required to cleave, the blade scribes the fiber, and the tension is incrementally increased to
propagate the scribe and produce the cleave. To activate the Subcritical Process, select it in the Parameter Select
Screen, and set it to ‘Enable’. When enabled, three additional parameters values must be specified. These
parameters are Re-Tension Level, Post-Scribe Pause, and Re-Tension Pause. Please refer to section 8.8 for a
definition of these parameters. In addition to specifying these new parameter values, two existing parameter values
may require adjustment. These are Cleave Tension and Cleave Oscillation Counter (peck cycles).
Experimentation will be required in order to set these Parameters. A general rule is that the Cleave Tension should
be lowered to 60% of the Auto Parameter value and the Cleave Oscillation Counter should be set at 30. Optimal
settings for these values are achieved when then the Cleave Blade will scribe the fiber in the last few oscillations
without causing the cleave to propagate or the fiber to bow significantly. Please note: all Subcritical Process
parameters settings are VERY fiber dependent.
Q: When do I use the thumbscrews?
The FHBs are designed to accommodate a wide range of fiber buffer and cladding sizes through the use of
changeable, top and bottom, FHB inserts. Thumbscrews on the FHB tops provide added clamping force for large
diameter fibers (>400 µm) or for fibers with very slippery coatings requiring additional clamping force. If the
thumbscrews are not required, they may be kept out of the way by threading backwards into the tops or by removing
completely.
Q: How can I check the quality of my cleaves?
One way to check cleave quality is to use an interferometric cleave checker. If you are working with a GPX3000,
you can instead use the software included to measure the cleave angles and view the end face.
Q: How do I know how many degrees to twist the fiber to achieve an angle cleave?
Experimentation is required to determine the ideal parameters for an angle cleave of any particular fiber. The Auto
Parameter tool built into the Tablet Controller can provide a first estimate for the cleave parameters. If you have
further questions, contact Thorlabs’ tech support at techsupport@thorlabs.com.
Q: How do I know which Inserts I need to use with my fiber?
Refer to the “Insert Selection Guide” (Section 10.1) or use the Insert Selection tool (Section 9.5.5).
Q: How do I figure out the meaning of all the Parameters referenced by the Tablet Controller?
Refer to Chapter 9: Controlling the LDC401.
Q: Is there a way to neatly cleave highly stressed fibers and very delicate fibers?
Yes, refer to Section 7.9: Specialty Cleave Processes.
Q: What should I do if the unit does not seem to be working properly?
Refer to Section 12.3: Troubleshooting.
For other questions, contact the distributor you bought the Cleaver from.
Rev B, July 19, 2017 Page 53
LDC401 & LDC401A Automated Cleavers Chapter 12: Servicing and Troubleshooting
12.3. Toubleshooting
Symptom Possible Cause Solution
Unit fails to reach
Cleave Tension
The lids won’t open
Unit fails to cleave fiber
Cleave angles are
too large
Capillary tube/PCF
breaks
when lids are lowered
Fiber end-face appears
shattered or rough when
examined closely
Rotary Stage fails to
return
to horizontal position
Fiber is not actually being held
because levers were not lifted
Fiber is not actually being held
because inserts are not
appropriate for that fiber size
Fiber is slipping in FHB’s because
of oil on Inserts
Magnetic clamping force is too
weak for the fiber you are using
Fiber is slipping because top
inserts are not fully seated in slots
(magnet force reduced)
Levers still up, magnetic attraction
still large
The last user tightened the
thumbscrews
Blade never reaches fiber (or
barely reaches fiber)
Blade reaches fiber but does not
cleave it since it is chipped
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
Fiber is slipping in FHB’s because
of oil on inserts
Fiber is slipping in FHB’s because
fiber is large and a large force is
required to tension it.
Fiber is twisting during loading
due to debris in FHB’s
Cleave Tension too low Raise Cleave Tension
Fiber offset on left and right is
mismatched due to insert
selection
Fiber is twisting when last FHB lid
is closed.
Clamping force created by
magnets is too high
Cleave Tension too high Lower Cleave Tension
Unit lost power while stage was
rotated forwards
Replace inserts with appropriately-sized
Clean lower v-groove inserts and top
inserts with cotton swab dipped in acetone
Loosen top set screws, lower FHB lids fully
by Lifting Levers, re-tighten set-screws
Press down on the levers to lift lids slightly,
Rotate thumbscrews counterclockwise until
Set recommended Pre-cleave Advance for
Fiber Diameter or adjust Blade Offset if
blade has just been replaced or height
Raise Cleave Blade Housing so that Cleave
Blade strikes fiber at different location
Use Micrometer Backstop
Clean Lower v-groove insert and top insert
with cotton swab dipped in acetone when
Use Thumb-screws to clamp
Clean Lower v-groove insert and top insert
with soft brush, brushing from the inside out
Use Insert Selection Guide to select inserts
such that fiber offsets will be as close as
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.
magnets in lid with a stick or
magnet to lower clamping force
Keep cycling power until Rotary Stage
returns to the horizontal position (may be
necessary to repeat several times)
Lift levers
Inserts
when vacuum is off
Use Thumb Screws
then try opening lids
they release
changed.
vacuum is off
FHB lids.
possible
Remove half of the top
Page 54 TTN100064-D02
LDC401 & LDC401A Automated Cleavers Chapter 13: Regulatory
Chapter 13 Regulatory
As required by the WEEE (Waste Electrical and Electronic Equipment Directive) of the European Community and
the corresponding national laws, Thorlabs offers all end users in the EC the possibility to return “end of life” units
without incurring disposal charges.
This offer is valid for Thorlabs electrical and electronic equipment:
Sold after August 13, 2005
Marked correspondingly with the crossed out “wheelie bin” logo (see right)
Sold to a company or institute within the EC
Currently owned by a company or institute within the EC
Still complete, not disassembled and not contaminated
As the WEEE directive applies to self-contained operational electrical and electronic products, this end of life take
back service does not refer to other Thorlabs products, such as:
Pure OEM products, that means assemblies to be built into a unit by the user (e. g. OEM laser driver cards)
Components
Mechanics and optics
Left over parts of units disassembled by the user (PCB’s, housings etc.).
If you wish to return a Thorlabs unit for waste recovery, please contact Thorlabs or your nearest dealer for further
information.
Wheelie Bin Logo
Waste Treatment is Your Own Responsibility
If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery.
Do not dispose of the unit in a litter bin or at a public waste disposal site.
Ecological Background
It is well known that WEEE pollutes the environment by releasing toxic products during decomposition. The aim of
the European RoHS directive is to reduce the content of toxic substances in electronic products in the future.
The intent of the WEEE directive is to enforce the recycling of WEEE. A controlled recycling of end of life products
will thereby avoid negative impacts on the environment.
Rev B, July 19, 2017 Page 55
LDC401 & LDC401A Automated Cleavers Chapter 14: Thorlabs Worldwide Contacts
Chapter 14 Thorlabs Worldwide Contacts
USA, Canada, and South America
Thorlabs, Inc.
56 Sparta Avenue
Newton, NJ 07860
USA
Tel: 973-300-3000
Fax: 973-300-3600
www.thorlabs.com
www.thorlabs.us (West Coast)
Email: sales@thorlabs.com
Support: techsupport@thorlabs.com
Europe
Thorlabs GmbH
Hans-Böckler-Str. 6
85221 Dachau
Germany
Tel: +49-(0)8131-5956-0
Fax: +49-(0)8131-5956-99
www.thorlabs.de
Email: europe@thorlabs.com
France
Thorlabs SAS
109, rue des Côtes
78600 Maisons-Laffitte
France
Tel: +33 (0) 970 444 844
Fax: +33 (0) 825 744 800
www.thorlabs.com
Email: sales.fr@thorlabs.com
Japan
Thorlabs Japan, Inc.
Higashi-Ikebukuro Q Building, 2F
2-23-2, Higashi-Ikebukuro,
Toshima-ku, Tokyo 170-0013
Japan
Tel: +81-3-5979-8889
Fax: +81-3-5979-7285
www.thorlabs.jp
Email: sales@thorlabs.jp
UK and Ireland
Thorlabs Ltd.
1 Saint Thomas Place, Ely
Cambridgeshire CB7 4EX
Great Britain
Tel: +44 (0)1353-654440
Fax: +44 (0)1353-654444
www.thorlabs.com
Email: sales.uk@thorlabs.com
Support: techsupport.uk@thorlabs.com
Scandinavia
Thorlabs Sweden AB
Bergfotsgatan 7
431 35 Mölndal
Sweden
Tel: +46-31-733-30-00
Fax: +46-31-703-40-45
www.thorlabs.com
Email: scandinavia@thorlabs.com
Brazil
Thorlabs Vendas de Fotônicos Ltda.
Rua Riachuelo, 171
São Carlos, SP 13560-110
Brazil
Tel: +55-16-3413 7062
Fax: +55-16-3413 7064
www.thorlabs.com
Email: brasil@thorlabs.com
China
Thorlabs China
Room A101, No. 100
Lane 2891, South Qilianshan Road
Putuo District
Shanghai
China
Tel: +86 (0) 21-60561122
Fax: +86 (0)21-32513480
www.thorlabschina.cn
Email: chinasales@thorlabs.com
Page 56 TTN100064-D02
www.thorlabs.com
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