Miyachi LF Series User manual

USER’S MANUAL 990-929
Rev. 5 March 2014
OPERATOR MANUAL
FOR THE
LF SERIES LASER

LF SERIES FIBER LASER
ii 990-929
Copyright © 2014, Miyachi America Corporation
The engineering designs, drawings and data contained herein are the proprietary work of MIYACHI
AMERICA CORPORATION and may not be reproduced, copied, exhibited or otherwise used without
the written authorization of MIYACHI AMERICA CORPORATION.
Printed in the United States of America
Revision Record
Revision EO Date Basis of Revision
1 N/A 12/2013 Production release.
2 N/A 12/13 Rewrite Conditions
3 N/A 12/17/13 Revised per QA
4 N/A 12/18/13 Update Callouts
5 N/A 3/18/14 Add Refrigerated Chiller

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CONTENTS Page
Revision Record ......................................................................................................................................... ii
Contents .............................................................................................................................................. iii
Contact Us ................................................................................................................................................v
CDRH Compliance Statement ....................................................................................................................v
Safety Precautions ..................................................................................................................................... vi
Chapter 1. System Description
Section I: Features .................................................................................................................................. 1-1
Section II: System Components ............................................................................................................. 1-3
Overview .......................................................................................................................................... 1-3
Fiber Laser Controller ...................................................................................................................... 1-4
Fiber Laser Supply System ............................................................................................................. 1-5
Chiller (Thermoelectric Type) ......................................................................................................... 1-6
Chiller (Refrigerant Type) ............................................................................................................... 1-7
Chapter 2. Installation And Setup
Section I: Planning ................................................................................................................................. 2-1
Physical Requirements ..................................................................................................................... 2-1
Section II: Installation ............................................................................................................................ 2-2
Installation Procedures ..................................................................................................................... 2-2
Power Requirements ....................................................................................................................... 2-3
Power Connection ............................................................................................................................ 2-3
Section III: Connections Reference ....................................................................................................... 2-4
Overview .......................................................................................................................................... 2-4
Fiber Laser Controller ...................................................................................................................... 2-5
Fiber Laser Supply System .............................................................................................................. 2-6
Chiller (Thermoelectric Type) ......................................................................................................... 2-8
Chiller (Refrigerant Type) ............................................................................................................... 2-9
Chapter 3. Operating Instructions
Section I. Welding Preparation .............................................................................................................. 3-1
Preparation ....................................................................................................................................... 3-1
General Operator Safety .................................................................................................................. 3-1
Starting the Laser ............................................................................................................................. 3-1
Section II. Operation Control Panel ....................................................................................................... 3-2
Prepare Processing Point and Set the Weld Schedule ..................................................................... 3-2
Schedule Screen ............................................................................................................................... 3-2
Status Screen .................................................................................................................................... 3-5
Trouble Screen ................................................................................................................................. 3-6

LF SERIES FIBER LASER
iv 990-929
Section III. External I/O ......................................................................................................................... 3-7
Welding Using The External I/O ..................................................................................................... 3-7
Shutdown through External I/O ....................................................................................................... 3-7
Page
Chapter 4. Maintenance
Section I: Precautions ............................................................................................................................ 4-1
Section II. Trouble Read Messages ....................................................................................................... 4-2
Section III: Routine Maintenance Schedule .......................................................................................... 4-4
Rear Panel Access ............................................................................................................................ 4-4
Section IV: Maintenance Procedures ..................................................................................................... 4-5
Thermoelectric Type ........................................................................................................................ 4-5
Approval Coolants .................................................................................................................... 4-5
Filling the Coolant, Priming, and Draining Instructions .......................................................... 4-6
Cleaning the Air Filter .............................................................................................................. 4-7
Draining the Chiller .................................................................................................................. 4-7
Clearing a Configuration Error ................................................................................................. 4-7
Refrigerant Type .............................................................................................................................. 4-8
Approval Coolants .................................................................................................................... 4-8
Checking Water Level & Start Chiller ..................................................................................... 4-9
Draining the System Fluid ........................................................................................................ 4-9
Additional Procedure for Cold Climate Conditions ................................................................. 4-9
Replacing the Water Filter ...................................................................................................... 4-10
Section V: Parts List ............................................................................................................................ 4-11
Consumable Parts .......................................................................................................................... 4-11
Section VI: Repair Service ................................................................................................................... 4-12
Appendix A. Technical Specifications ............................................................................................... A-1
Appendix B. Electrical And Data Connections .................................................................................B-1
Appendix C. External RS-232 Communication ................................................................................C-1

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CONTACT US
Thank you for purchasing a Miyachi Unitek LF Series Fiber Laser. Upon receipt
of the laser, please thoroughly inspect it for shipping damage before you install it.
If there is any damage, contact the shipping company immediately to file a claim,
and notify Miyachi America at:
Miyachi America Corporation
1820 South Myrtle Ave.
Monrovia, California 91017-7135
Phone: [phone]
FAX: [phone]
E-mail: [email protected]
The contents of this manual are subject to change without notice. If you have any
questions, or find any errors or omissions in it, please contact us.
Miyachi America is not responsible for any losses due to improper use of this
product.
CDRH COMPLIANCE STATEMENT
The Miyachi America Corporation LF SERIES FIBER LASER is certified to be
fully compliant with all applicable standards and regulations as set forth by the
United States of America’s Health and Human Services (HHS), Food and Drug
Administration (FDA), Center for Devices and Radiological Health (CDRH), title
21 Code of Federal Regulations (CFR) sections 1002, 1010, and 1040 for Class
IV laser devices.
Reference CDRH Accession number is available upon request.

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SAFETY PRECAUTIONS
General
This Operator's Manual describes the Operation and Maintenance for all models of
the LF Series Fiber Laser, and provides instructions relating to its SAFE use.
Procedures described in this manual must be performed as detailed by qualified
and trained personnel.
NOTE: For the rest of this manual, all models of LF Series Fiber Laser will
simply be referred to as “the Laser,” except in specific instances where unique
descriptions are required such as specifications, connections, etc.
For SAFETY, and to effectively take advantage of the full capabilities of the Laser,
please read this instruction manual and the Laser Safety Manual
(Part Number 990-502) thoroughly before attempting to use the Laser.
After reading this manual, retain it for future reference when any questions arise
regarding the proper and SAFE operation of the Laser.
Operation
When operating or servicing the Laser, always wear Protective Goggles having an
optical density of at least 7+at a wavelength of 1060-1150 nanometers for the
operation of the Laser.
Appoint a Laser Safety Officer. The Laser Safety Officer (LSO) must provide
personnel with sufficient training so that personnel can operate, maintain and
service the Laser safely. The LSO must take charge of the key to the Key Switch
to ensure that only qualified and authorized personnel operate the Laser.
Establish and control a dedicated Laser Operation Area. The Laser Safety Officer
must isolate the Laser Operation Area from other work areas and display signs
warning that the Laser Operation Area is off-limits to unauthorized personnel.
Maintenance/Service
Before performing any maintenance on the Laser, read Chapter 4, Maintenance
thoroughly. Use the appropriate tools for terminating the connecting cables, being
careful not to nick the wire conductors.
Procedures other than those described in this manual or not performed as
prescribed in this manual, may expose personnel to electrical and/or laser radiation
hazards.
Do not modify the Laser without prior written approval from the Miyachi America
Corporation.

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B
efore using this equipment, read the Safety Precautions carefully to understand the correct usage of the
equipment.
These precautions are given for the safe use
of the Laser and for prevention of injury to
operators or others.
Be sure to read each of the instructions, as
they are all important for safe operation.
The meaning of the words and symbols are
as follows:
DANGER
Do not touch the interior of the Laser when it is turned ON.
Doing so may result in electric shock.
Never attempt to disassemble, repair, or modify the Laser.
Doing so may result in electric shock or fire.
Refrain from any mechanical adjustment other than the maintenance procedures specifically
described in the operation manual.
Never expose eyes or skin to laser irradiation.
Exposure to direct or scattered laser light is extremely hazardous.
Direct exposure of the eye to laser beams may result in blindness.

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WARNING
Wear protective glasses.
Be sure to wear protective glasses while using the Laser. Even with eye protection, you may
lose your sight if you look directly at the laser beam.
Do not expose your skin to the laser beam.
Your skin may be severely burned.
Do not touch any processed part during, or immediately after processing.
Welded parts are very hot.
Use only specified cables.
A cable with insufficient capacity or loose connections can cause electric shock or fire.
Do not use a damaged power cable, connecting cables, or plugs.
Do not step on, twist, or tense any power cable. The power cable and connecting cables
may be damaged which can cause electric shock, short circuit, or fire. If any part needs to be
repaired or replaced, consult Miyachi America or your distributor.
Stop operation if any trouble occurs.
If you detect a burning smell, abnormal sounds, abnormal heat, smoke, etc. from the Laser,
turn the power OFF immediately to prevent fire or electric shock. Contact Miyachi America
or your distributor for help.
Ground the Laser.
If the Laser is not grounded, you may get an electric shock when there is trouble or if
electricity leaks through the protective insulation.
Use a stopper plug.
Laser beams are dangerous to the human body. Prevent accidental leakage of the laser
beam by using a stopper (a heat-resistant, laser beam absorbing material).
People with pacemakers MUST stay away from the Laser.
When the Laser is operating, it generates a magnetic field, which adversely affects
pacemakers. People who use a pacemaker must not approach the Laser, or walk around
the laser shop while the Laser is operating, unless their medical doctor has deemed it safe to
do so.

LF SERIES FIBER LASER
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CAUTION
Keep water and water containers away from the Laser.
Water spilled on the Laser can cause a short circuit, electrical shock, or fire.
Use proper tools (wire strippers, pressure wire connectors, etc.) for terminations of the
connecting cables.
Do not nick the wire conductor. Doing so can cause a short circuit, electric shock, or fire.
Install the Laser on a firm, level surface.
Injury may result if the Laser falls over or drops from an uneven surface.
Keep combustible matter away from the Laser.
Laser spatter can ignite combustible materials. If you cannot remove all combustible materials,
cover them with a non-combustible material.
NEVER apply the laser beam to combustible materials.
To avoid the risk of fire, never apply the laser to flammable or combustible materials.
When operating the Laser, do not cover it with a blanket, cloth, etc.
Heat generated by the operating Laser may ignite a blanket or cover.
Do NOT use the Laser for purposes other than processing metal.
Use of the Laser on other materials, or in a manner other than specified may cause fire or
electrical shock.
Wear protective gear when operating the Laser.
Wear protective gear such as protective gloves, long-sleeved jacket, leather apron, etc. so that
Laser spatter will not burn the skin.
Keep a fire extinguisher nearby.
Make sure there is a fire extinguisher in or near the Laser shop in case of fire.
Regularly inspect and maintain the Laser.
Regular inspection and maintenance is essential for safe operation and long life of the Laser.
If you see any damage, make necessary repairs before operating the Laser.

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Guidelines for Normal Use
1. Appoint a Laser Safety supervisor. Ensure that the supervisor has as much expertise and experience
with lasers and laser equipment as possible.
The supervisor, who will be in charge of the laser key switch, is responsible for familiarizing users
with safety issues and for coordinating laser welding.
2. Partition off all areas that may be exposed to laser light.
The supervisor is responsible for posting signs to keep unauthorized personnel out of the laser area.
3. Install the Laser on a solid, level surface.
To prevent errant laser processing, place workpieces on the same stand as the Laser Head so
that the workpieces do not vibrate during laser processing.
4. To ensure optimal welding quality, use the Laser in a location where ambient temperatures are 41ºF
to 105ºF (5°C to 40°C), free of sudden temperature fluctuations and a relative humidity less than
85% (non-condensing). Do not use the laser in any of the following locations:
Locations with excessive dirt or oil mist
Locations in which the unit may be subject to vibration or impact
Locations in which the unit may be exposed to chemicals
Locations near sources of high-frequency noise, or
Locations in which condensation may form on the unit's surface.
5. If the room temperature changes quickly (as when a heater is turned ON in cold weather), moisture
may condense on the optical components, resulting in fogging or collection of dust.
Avoid sudden changes in temperature. Under the conditions in which condensation may occur, wait
for a period of time after turning the unit ON before beginning operations.
6. If the exterior of the unit becomes soiled, wipe it with a soft dry or lightly moistened cloth.
Clean heavily soiled areas with a cloth moistened with diluted neutral detergent or alcohol. Do not
use paint thinner, acetone, benzene, or similar chemicals, which may discolor or damage the unit.
7. Never place screws or other foreign objects inside the Laser. Such objects can damage the unit.
8. Operate the switches and buttons gently by hand.
Applying excessive force or using the tip of a screwdriver, pen, or other instrument may damage the
Laser.
9. Operate only one switch or button at a time.
Attempting to operate several at a time may damage the Laser.

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WARNING
Always wear protective goggles when maintaining the Laser.
Goggles must have an optical density of at least 7+, at a wavelength
of 1060-1150 nanometers for the operation of the Laser.
10. For more consistent performance, allow the unit to thermally stabilize for approximately 10 to 30
minutes before use. (The appropriate warm-up time will depend on the ambient temperature and
work piece material.)
Refer to the following standards for more information on managing laser equipment:
●IEC60825-1 Edition1.2 “Safety of laser products Part1: Equipment
Classifications, requirements and user's guide.”
●Miyachi America Laser Safety Manual (Part Number 990-502)
Warning Labels
The Laser Welder carries the following labels. Read and follow the label instructions to ensure correct
use.

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LF SERIES FIBER LASER
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CHAPTER 1
SYSTEM DESCRIPTION
Section I: Features
For the rest of this manual the LF Series Fiber Laser will simply be referred to as “the Laser,” except
in specific instances where unique descriptions are required such as specifications, connections, etc.
Drawing on Miyachi America's extensive experience in laser micro welding, this laser provides a
platform for small welding applications. Small component welding demands small spot sizes and precise
control of energy and pulse duration to ensure a highly reliable process.

CHAPTER 1: SYSTEM DESCRIPTION
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Designed for Fine Micro Welding. Focused spot sizes down to 50 microns, and precise
control of pulse width and peak power to enable fine micro welding.
Excellent power stability. Fine micro welding applications require high stability of the laser
source for reliable welding. The LF series fiber lasers offer excellent power and pulse-to-pulse
stability with an internal air-to-water cooling mechanism which maintains stability irrespective
of the ambient air temperature.
Easy Program Interface. The laser may be operated in either pulsed or cw mode, with all the
features necessary for control of the weld, including pulse shaping. The control interface can be
integrated into the laser or provided separately for workstation integration.
Flexible Integration. Can be integrated to any motion platform including both stage and
gantry systems, as well as scan heads.
Remote Operation. Laser schedule select and schedule changes can be made via an RS232
connection.
HMI panel. The laser can be programmed quickly, easily, and intuitively using a high definition
8” touchscreen.

CHAPTER 1: SYSTEM DESCRIPTION
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990-929 1-3
Section II: System Components
Overview
While there are different configurations of the Laser, each model has 3 primary components:
Figure 1-2. Primary Components
1 FIBER LASER CONTROLLER The control unit has a HMI panel display that allows the input of
laser parameters, an Emergency Stop switch, a Emission (Laser Start) switch, a key switch for
laser operation, Alarm indicator, Laser Enable indicator and laser Emitting (status) indicator.
2 FIBER LASER SUPPLY SYSTEM The engine for the laser. The front of this unit contains an
operation keyswitch and status indicators. The rear of this unit has communication ports, main
p
ower input, and the fiber output from the system.
3 CHILLER UNIT A closed loop cooling system to maintain consistent laser output. The front of
this chiller unit has a temperature controller and chiller status indicator lights. The process
supply connections and power input are located on the back of this unit.

CHAPTER 1: SYSTEM DESCRIPTION
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Fiber Laser Controller
Figure 1-3. Front Control Panel
1 POWER INDICATOR Illuminates when touchscreen HMI is on.
2 CONTROL KEYSWITCH When the main power is ON, turning this switch ON will make the laser
operable. When shutting down the laser, turn this switch OFF and remove the key. A
designated safety supervisor should keep the key.
3 EMISSION BUTTON with START/STOP INDICATOR. Pressing this button when the laser is ready
will produce laser emission. If the Laser is programmed for continuous mode operation,
pressing this button once will start a continuous output of programmed laser pulses. Pressing it
again will stop laser emission (will not occur if the Laser is set for EXT. I/O control).
4 ALARM INDICATOR Illuminates only when the Laser Supply System is in an fault condition.
Reference the HMI panel for alarm condition.
5 EMITTING INDICATOR Illuminates when the laser is emitting through the fiber.
6 LASER ENABLED INDICATOR Illuminates when the main power is ON, the keyswitch is in the
ON position, and there are no alarm conditions. The laser is prepared for emission when the
Emission buttons are pressed.
7 HMI PANEL DISPLAY Allows for input of laser parameters via a touchscreen.
8
EMERGENCY STOP SWITCH This switch stops the laser immediately. Use this function only in
an emergency.
9 POWER SYSTEM SWITCH This switch turns system power on/off. NOTE: Main breaker must be
ON position.

CHAPTER 1: SYSTEM DESCRIPTION
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Fiber Laser Supply System
Figure 1-4. Fiber Laser Supply System Front Panel
1 ON/OFF KEYSWITCH: This keyswitch enables and disables the firing of the laser.
NOTE: Leave in the “ON” position if the system power is ON.
2 ENABLED Indicates that the laser driver circuit is enabled and the laser emission is under
external control. Two laser enabled status LEDs are provided for component redundancy.
3 LASER EMISSION INDICATOR Indicates a voltage signal for emission is present. Two laser
emission status LEDs are provided for component redundancy.
4 ALARM INDICATOR This indicator illuminates when the laser is in a fault condition. Reference
the pendant or software for information.
5 TARGETING LASER INDICATOR This indicator illuminates when the targeting laser is turned on.
This indicator is amber when the targeting laser is ON, and not indicating when the targeting
laser is OFF.
6 MODEL NUMBER LABEL “LFxxxA” The “xxx” value is the maximum output of the Fiber Laser,
in watts.

CHAPTER 1: SYSTEM DESCRIPTION
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Chiller (Thermoelectric Type)
Figure 1-5. Chiller Front Panel
1 AIR FILTERS Air inlet and outlet filters provide a clean supply of air to the coolant chiller.
These filters must be kept clean and clear of debris.
2 RUN / STANDBY This button stops the flow of coolant to the laser and restarts it if the button is
p
ressed again. When the unit is initially powered up all buttons will be disabled until the pump
is brought to full speed. The unit will control to 20 deg. C or the last user set temperature.
3 LCD DISPLAY Displays the chiller state, the set temperature, and any alarms.
4 UP When the Menu button has been pressed and the display reads ‘Set Temperature’, press the
up button to increase the desired temperature. The set value will scroll in tenths of degrees and
then change to full degree increments.
5 DOWN When the Menu button has been pressed and the display reads ‘Set Temperature’, press
the down button to reduce the desired temperature. The set value will scroll in tenths of degrees
and then change to full degree increments.
6 MENU The Menu button allows the chiller to be set to the proper temperature. Press this button
until the display reads ‘Set Temperature’.