Amada ML-2050A-CE User manual

AA06OM1170500-19
OPERATION MANUAL
Original instructions
YAG LASER WELDER
ML- -CE
2050A
2051A
2150A

2ML-2050A/2051A/2150A
How to Use This Document
ATTENTION
In this manual, ML-2050A denotes ML-2050A-CE; ML-2051A, ML-2051A-CE; and
ML-2150A, ML-2150A-CE.
Thank you for purchasing our YAG Laser Welder ML-2050A/2051A/2150A.
This operation manual explains its method of operation and precautions for use.
Before using, read this operation manual carefully; after reading, save it in a proper
place for your future reference.
This document is composed of the 4 parts of "Introduction Part", "Installation and
Preparation Part", "Operating Part", and "Maintenance Part", and "Appendixes."
We recommend inexperienced users to read through the whole contents starting from
"Introduction Part."
This document allows the user to understand the whole equipment image, basic
conguration, and how to use the laser.
Experienced users can refer to the desired page from the table of contents.
Organization of This Document and Its Contents
Introduction Part: Explains the outline and functions of the laser. Regarding the YAG
Laser, this part explains the basic configuration and functional
outline of this product including options so that the user can know
the conguration of the laser and equipment composition, and also
the name and function of each component section.
Installation and
Preparation Part:
Explains the installation of the laser and preparatory operations
such as connections of its respective sections.
Operating Part: Explains how to operate the laser. First, this part explains how to
perform each setting and how to operate the laser. Three types
of control (control by control panel, control by external input/
output signals, and control by external communication control) are
explained in the operating method for laser welding.
Maintenance Part: Explains how to perform maintenance and how to handle trouble.
Appendixes: For reference materials, specications, dimensional outline drawing,
available output, timing chart, and list of terminology are available.
In the output schedule data entry table, the user can enter
registered laser output schedule data for use.

3
ML-2050A/2051A/2150A
Contents
How to Use This Document ..............................................2
For Use in Safety ......................................................6
Safety Precautions ..............................................6
Precautions for Handling ................................................9
Laser Safety Supervisor ..........................................9
Routine Handling ...............................................9
For Transportation .............................................10
For Disposal ..................................................11
Sticking Warning/Danger Labels .........................................12
Introduction Part 15
Chapter 1 Overview of the YAG Laser Welder ......................17
1. YAG Laser ........................................................17
2. Mechanism of the YAG Laser..........................................18
3. Functions of the ML-2050A/2051A/2150A ................................19
4. Product Composition ................................................20
Packaging ....................................................20
Checking the Packaged Products..................................20
Options ......................................................22
Chapter 2 Name and Functions of Each Section ....................25
1. Name and Function of Each Section on the Front Side ......................25
Front Cover Section ............................................25
Inside of the Front Side..........................................26
2. Name and Function of Each Section on the Top Side .......................28
Top Cover Section .............................................28
Control Panel .................................................29
Laser Oscillator Section .........................................30
3. Name and Function of Each Section on the Lateral Side and Rear Side.........32
Installation and Preparation Part 33
Chapter 1 Installation ..........................................35
1. Installation Place ...................................................35
Space Required for Installation....................................35
Environment Suitable for Installation and Precautions ..................37
2. Cooling Water......................................................38
Precautions on Cooling Capacity and Room Temperature...............39
Chapter 2 Connections and Preparations of Each Section............41
1. Connecting the Power Supply .........................................41
2. Preparing Cooling Water .............................................42
3. Connecting the Optical Fiber ..........................................43
4. Connecting the Laser Controller (Option).................................46
5. Connecting the External Communication Conversion Adapter (Option) .........47

4ML-2050A/2051A/2150A
Operating Part 49
Chapter 1 Control Method, and Start and Stop .....................51
1. Control Method.....................................................51
Switching the Control Method.....................................51
2. Start and Stop .....................................................52
How to Start the Laser ..........................................52
How to Stop the Laser ..........................................52
Chapter 2 Various Settings......................................53
1. Setting Welding Schedules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Welding Schedule Setting Screen .................................53
Setting Laser Light Output Schedules (SCHEDULE Screen).............61
Setting the Output Status (STATUS Screen) .........................65
Setting the Output Status Check Screen (POWER MONITOR Screen).....68
Protecting Set Values (PASSWORD Screen) .........................71
Switching the Accuracy of the Measured Laser Energy Value (J) (INITIAL Screen) .74
Switching the Pulse Width Setting Range (INITIAL Screen)..............76
2. Setting the Laser Light Delivery ........................................78
Laser Light Sharing.............................................78
Operating Branch Shutters on the STATUS Screen ....................80
Controlling Branch Shutters Independently ..........................81
3. Changing the Acceptance Time for Laser Start Signal/Schedule Signal .........83
4. Setting the Function of the Output Unit with Fiber Sensor (Option) .............85
Chapter 3 Laser Welding by Control Panel (PANEL CONTROL)........87
1. Operation Flow .....................................................87
2. Control Panel Functions ..............................................88
3. Operating Procedure ................................................89
Chapter 4 Laser Welding by External Input/ Output Signals (EXTERNAL CONTROL) . 95
1. Operation Flow .....................................................95
2. Preparations for Operations ...........................................96
3. Connector Functions ................................................97
Pin Arrangement and Functions ...................................97
Example Connections of External Input Signals......................109
Example Connection of External Output Signals .....................111
4. Programming .....................................................112
Chapter 5 Laser Welding by External Communication Control (RS-485 CONTROL) . 117
1. Operation Flow ....................................................117
2. Preparations for Operations ..........................................118
3. Initial Settings .....................................................119
Setting Communication Schedules................................119
Setting Equipment No. .........................................121
4. Commands .......................................................123
Setting Data .................................................125
Reading Data ................................................126
Setting the Control Method, SCHEDULE No., Branch Shutter, etc. .......131
Setting the Mirror of the Timesharing Unit ..........................132

5
ML-2050A/2051A/2150A
Reading the Control Method, SCHEDULE No., Branch Shutter, etc. ......133
Reading the Timesharing Unit Status ..............................134
Starting a Laser Light Output ....................................134
Stopping a Laser Light Output ...................................135
Stopping an Error Signal Output..................................135
Resetting the Total Number of Outputs.............................136
Resetting the Appropriate Number of Outputs .......................136
Reading Error No. at Occurrence of Trouble ........................136
Chapter 6 Printing Set Values and Measured Values................139
1. Printing Set Values .................................................139
2. Printing Measured Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
Maintenance Part 143
Chapter 1 How to Perform Maintenance ..........................145
NOTE .............................................................145
1. Maintenance Parts and Standard Intervals of Inspection/Replacement.........145
2. Maintenance of the Cooler Unit Section.................................148
Cleaning the Air Filter ..........................................148
Draining Water from the Cooling Water Tank ........................149
Changing the Ion-Exchange Resin and Replacing the Ion-Exchanger.....150
Cleaning the Water Filter .......................................153
Bleeding the Laser Chamber and Others of Water....................154
3. Maintenance of the Laser Oscillator Section .............................155
Replacing the Flashlamp .......................................155
Making an Incident Beam Adjustment of the Optical Fiber ..............159
Cleaning the Optical Part of the Output Unit.........................159
Cleaning the Optical Fiber ......................................160
4. Maintenance of the Power Supply Section...............................161
Replacing the Lithium Battery for Backup...........................161
Replacing the Battery of the Control Board of the Control Panel .........162
Cleaning the Air Filter ..........................................163
Chapter 2 Inspection and Measure To Be Taken at Occurrence of an Error. 165
1. Error Display and How to Take a Measure...............................165
Operation for Closing Interlock ...................................169
2. Troubles not Displaying Fault Code ....................................169
Appendixes 171
Specications .......................................................173
Dimensional Outline Drawings ..........................................175
Available Output .....................................................176
Timing Chart ........................................................178
Explanation of Terminology ............................................184
Output Schedule Data Entry Table .......................................189
Index .......................................................193

6ML-2050A/2051A/2150A
For Use in Safety
For Use in Safety
Safety Precautions
Before using, read "Safety Precautions" carefully to understand the correct
method of use.
These precautions are shown for safe use of our products and for prevention of
damage or injury to operators or others. Be sure to read each of them, since all of
them are important for safety.
A meaning of a gure sign
Denotes operations and practices that may imminently result in
serious injury or loss of life if not correctly followed.
Denotes operations and practices that may result in serious injury or
loss of life if not correctly followed.
Denotes operations and practices that may result in personal injury
or damage to the equipment if not correctly followed.
Denote "prohibition."
They are warnings about actions out of the scope of the warranty of
the product.
Denote actions which operators must take.
Denotes that the content gives notice of DANGER, WARNING or
CAUTION to the operator.
Do not touch the inside of the Laser unnecessarily.
Since source voltage of single-phase 200/220/240 V AC is applied to the
Laser, high voltages are applied to its inside. Do not touch the inside of
the Laser unnecessarily with the power turned ON.
Never disassemble, repair or modify the Laser.
These actions can cause electric shock and re. Do not do anything other
than the maintenance described in the operation manual.
Do not look at or touch the beam.
Both direct laser beams and scattered laser beams are highly dangerous.
If the beam enters the eye directly, it can cause blindness.
Never burn, destroy, cut, crush or chemically decompose the Laser.
This product incorporates parts containing gallium arsenide (GaAs).
DANGER
WARNING
CAUTION
DANGER

For Use in Safety
7
ML-2050A/2051A/2150A
Wear protective glasses.
Be sure to wear protective glasses having an optical density of at least
7 while using the Laser. Even if you wear them, you may lose your sight
if the laser beam enters your eyes directly through protective glasses.
Protective glasses attenuates the laser beam, but does not block it.
Do not expose your skin to the laser beam.
Your skin may be severely burnt.
Do not touch any processed workpiece during and just after
processing nished.
The processed workpieces are very hot.
Use only specied cables.
Use of a cable of insu󰀩cient capacity or loose connection can cause
electric shock re.
Do not damage the power cable or connecting cables.
Do not tread on, twist or tense any cable. The power cable and connecting
cables may be broken, and that can cause electric shock and re. If any
part needs to be repaired, consult us or your distributor.
Stop the operation if any trouble occurs.
Continuous operation after occurrence of a trouble such as burning smell,
abnormal sound, abnormal heat, smoke, etc. can cause electric shock and
re. If such a trouble occurs, immediately consult us or your distributor.
Ground the Laser.
If the Laser is not grounded, you may get an electric shock when there is
trouble or electricity leaks.
Use a stopper.
The laser beam is dangerous to human bodies. Prevent emission through
the air by using a stopper (a heat-resistant, laser beam-absorbing,
-scattering material).
Persons with pacemakers must stay clear of the Laser.
Those who use a pacemaker must not approach the Laser or walk around
the welding shop while the Laser is in operation, without being permitted
by his/her medical doctor. The Laser generates a magnetic eld and has
e󰀨ects on the operation of the pacemaker while it is turned ON.
WARNING

8ML-2050A/2051A/2150A
For Use in Safety
Do not splash water on the Laser.
Water splashed over the electric parts, can cause electric shock and short circuits.
Use proper tools (wire strippers, pressure wire connectors, etc.) for
termination of the connecting cables.
Do not cut the wire conductor. A re or electric shock will occur.
Install the Laser on a rm and level surface.
If the Laser falls or drops, injury may result.
Do not place a water container on the Laser.
If water spills, insulation of the Laser will deteriorate, and that can cause
electric leaks and re.
Keep combustible matter away from the Laser.
Surface ash and expulsion can ignite combustible matter. If it is impossible
to remove all combustible matter, cover it with non-combustible material.
Do not apply the laser beam to combustible materials.
To avoid risk of re never apply the laser beam to ammable or
combustible materials.
Do not cover the Laser with a blanket, cloth, etc.
Do not cover the Laser with a blanket, cloth, etc. while you are using it.
The cover may be overheated and burn.
Do not use this Laser for purposes other than metal processing.
Use of the Laser in a manner other than specied can cause electric
shock and re.
Protective gear must be worn.
Put on protective gear such as protective gloves, long-sleeve jacket, leather
apron, etc. Surface ash and expulsion can burn the skin if they touch the skin.
Keep a re extinguisher nearby.
Keep a re extinguisher in the processing shop in case of re.
Maintain and inspect the Laser periodically.
Maintain and inspect the Laser periodically, and repair any damage before
starting operation.
CAUTION

Precautions for Handling
9
ML-2050A/2051A/2150A
Precautions for Handling
Laser Safety Supervisor
⇒Appoint a safety supervisor for all laser work.
The appointed safety supervisor must have su󰀩cient knowledge and experience
regarding both lasers and laser work.
⇒The supervisor must control the keyswitch of the Laser, and must be responsible
for instructing operators in safety aspects of the Laser as well as directing the
laser work.
⇒Establish and control a laser operation area.
The responsible person must isolate the laser operation area from other areas
and control it by fences and display signs indicating that the area is o󰀨-limits to
unauthorized personnel.
Routine Handling
⇒Perform inspection periodically referring to the Maintenance Part, Chapter 1 "1.
Maintenance Parts and Standard Intervals of Inspection/Replacement" on page 145.
⇒If the outside of the Laser is stained, wipe it with a dry cloth or a moistened cloth.
If it is badly stained, use neutral detergent or alcohol to clean it. Do not use
paint thinner, benzine, etc. which can discolor or deform the parts.
⇒Do not put screws, coins, etc. in the Laser, since they can cause a malfunction.
⇒Operate the switches and buttons carefully by hand. If they are operated
roughly or with the tip of a screwdriver, a pen, etc. they may be broken.
⇒Operate the switches and buttons one at a time. If two or more of them are
operated at a time, the Laser may have trouble or may be broken.
⇒The outer panels and the covers are electrically connected to the main unit
by connecting cables. When the panels, covers and connecting cables are
removed and installed again, make sure that all these components are put back
into place correctly. Also, make sure that the cables do not block the optical path
of the oscillator or get caught between the outer panel and the frame.
⇒To prevent damage, do not bend the optical ber beyond its minimum bending
radius or apply any forms of shock to it. For the ber’s minimum bending radius,
see the table below.
Minimum bending radius of the optical ber
Core Diameter Minimum Bending Radius
φ 0.2, 0.3, 0.4 mm 100 mm
φ 0.6 mm 150 mm
φ 0.8 mm 200 mm
φ 1.0 mm 250 mm
⇒When a supervisor or operator enters the area where the laser is used,
protective measures not to exceed the MPE* level must be taken.
* MPE: The maximum level of permissible exposure of the eyes or skin to laser beams. Abbreviation of
Maximum Permissible Exposure.
* For other information on managing laser equipment or the MPE level, refer to the
following standards.
IEC Standards IEC60825-1 “Safety of laser products Part1: Equipment
Classications, requirements and use’s guide”

10 ML-2050A/2051A/2150A
Precautions for Handling
For Transportation
When transporting the laser, observe the following precautions to avoid
hazards.
⇒Package the Laser when transporting it.
⇒The worker must wear a helmet, safety shoes and gloves for safety. (Leather
gloves are recommended.)
⇒When transporting the Laser, use a lift truck, crane, belt, etc., of at least 100 kg
allowable load.
⇒When lifting the Laser with a lift truck, crane belt, be sure to hold the Laser at the
bottom of corrugated cardboard between the blocks A and B.
⇒Carry the Laser with casters on at place.
Front
Block A Fasten the belt or insert the prongs Block B
of the lift truck between these blocks.

Precautions for Handling
11
ML-2050A/2051A/2150A
For Disposal
This product incorporates parts containing gallium arsenide (GaAs). At the time of
disposal, separate it from general industrial waste or domestic waste and carry out
the disposal in accordance with applicable laws and regulations.

12 ML-2050A/2051A/2150A
Sticking Warning/Danger Labels
Sticking Warning/Danger Labels
Warning/danger labels are struck on the laser. Read the precautions provided on
each label for correct use. The numbers correspond to the label gure numbers on
the next page.
CHIBA 278-0016 JAPAN
95-3 FUTATSUKA NODA-CITY
MODEL No.
P-00161-002
CLASS Ⅳ LASER PRODUCT
SERIAL No. LABEL
Hz
1
ms
Hz
INPUT POWER VOLTS
MAX. RMS AMPS
MAX. AVERAGE POWER
MAX. PULSE ENERGY
PULSE DURATION
WAVELENGTH
PULSE REPETITION RATE
MFG:MONTH , YEAR
,
VAC
Phase 50/60Hz
A
W
J
-
-
1.064
μm
AMADA WELD TECH CO.,LTD.
MANUFACTURED BY:
ON
OFF
CURSOR
RESET MENU
OFF
(-) (+)
ENTER
TROUBLE ON
Y
E
G
R
M
E
E
T
P
O
C
N
S
SHUTTER 1 SHUTTER 2
READY
SHUTTER 3
CONTROL
HIGH VOLTAGE
POWER
START/STOP
LASER
EMISSION
YAG LASER CONTOROLLER
AVOID EXPOSURE-LASER 被ばくを回避のこと - この
P-00377-001
FROM THIS APERTURE RADIATION IS EMITTED 開口からレーザ放射が出る。
危 険
DANGER
ここを開き、そしてｲﾝﾀ
ﾛｯｸを解除するとｸﾗｽ4の
ﾚｰｻﾞ放射が出る。ﾋﾞｰﾑ
や散乱光の目又は皮膚
への被ばくを避けること
P-00474-001
P-00374-001
HIGH VOLTAGE
EXPOSED TO ELECTRICAL SHOCK HAZARD
IF INTERLOCK IS DEFEATED PERSONNEL MAY BE
DISCONNECT POWER AND WAIT 5MIN.
BEFORE SERVICING
感電するおそれがあります。
高圧危険
また、電源切替後５分以内は
セーフティインタロックを解除すると
内部に絶対に触れないでください。
危険 - 可視及び/又は不可視レーザ光
DANGER - VISIBLE AND/OR INVISIBLE LASER RADIATION
危険
DANGER
VISIBLE AND/OR INVISIBLE LASER RADIATION WHEN
OPEN AND INTERLOCKS DEFEATED AVOID EYE OR SKIN
EXPOSURE TO DIRECT OR SCATTERED RADIATION
LB1164753
最大出力 / MAX
媒 質 / MEDIUM
パルス幅 / PULSE WIDTH
波 長 / WAVE LENGTH
クラス４レーザ製品 CLASS 4 LASER PRODUCT
JIS C6802:2014
パルス波 / PULSE
Nd：YAG
1.064μm
連続波 / CW
0.650μm
半導体レーザ / LD
IEC60825-1:2014
VISIBLE AND/OR INVISIBLE LASER RADIATION
MAX OUTPUT
PULSE DURATION
WAVELENGTH(S)
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION
CLASS Ⅳ LASER PRODUCT
P-1221
CLASS 4 LASER RADIATION
WHEN OPEN AND INTERLOCKS
DEFEATED AVOID EYE OR
SKIN EXPOSURE TO DIRECT
OR SCATTERED RADIATION.
ビームや散乱光の目又は皮膚の被ばくをさけること
AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION
ここを開き、そしてインタロックを解除すると
クラス４のレーザ放射が出る。
P-00374-001
HIGH VOLTAGE
EXPOSED TO ELECTRICAL SHOCK HAZARD
IF INTERLOCK IS DEFEATED PERSONNEL MAY BE
DISCONNECT POWER AND WAIT 5MIN.
BEFORE SERVICING
感電するおそれがあります。
高圧危険
また、電源切替後５分以内は
セーフティインタロックを解除すると
内部に絶対に触れないでください。
(1) (2) (3) (4)
(5)
(6)
(2)
Top view
Rear viewRight side viewFront view

Sticking Warning/Danger Labels
13
ML-2050A/2051A/2150A
(1)
(2)
(3)
(4)
(5)
(6)
VISIBLE AND/OR INVISIBLE LASER RADIATION
MAX OUTPUT
PULSE DURATION
WAVELENGTH(S)
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION
CLASS Ⅳ LASER PRODUCT
P-1221
P-00374-001
HIGH VOLTAGE
EXPOSED TO ELECTRICAL SHOCK HAZARD
IF INTERLOCK IS DEFEATED PERSONNEL MAY BE
DISCONNECT POWER AND WAIT 5MIN.
BEFORE SERVICING
感電するおそれがあります。
高圧危険
また、電源切替後５分以内は
セーフティインタロックを解除すると
内部に絶対に触れないでください。
危 険
DANGER
ここを開き、そしてｲﾝﾀ
ﾛｯｸを解除するとｸﾗｽ4の
ﾚｰｻﾞ放射が出る。ﾋﾞｰﾑ
や散乱光の目又は皮膚
への被ばくを避けること
P-00474-001
CLASS 4 LASER RADIATION
WHEN OPEN AND INTERLOCKS
DEFEATED AVOID EYE OR
SKIN EXPOSURE TO DIRECT
OR SCATTERED RADIATION.
危険 - 可視及び/又は不可視レーザ光
DANGER - VISIBLE AND/OR INVISIBLE LASER RADIATION
危険
DANGER
VISIBLE AND/OR INVISIBLE LASER RADIATION WHEN
OPEN AND INTERLOCKS DEFEATED AVOID EYE OR SKIN
EXPOSURE TO DIRECT OR SCATTERED RADIATION
LB1164753
最大出力 / MAX
媒 質 / MEDIUM
パルス幅 / PULSE WIDTH
波 長 / WAVE LENGTH
クラス４レーザ製品 CLASS 4 LASER PRODUCT
JIS C6802:2014
パルス波 / PULSE
Nd：YAG
1.064μm
連続波 / CW
0.650μm
半導体レーザ / LD
IEC60825-1:2014
ビームや散乱光の目又は皮膚の被ばくをさけること
AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION
ここを開き、そしてインタロックを解除すると
クラス４のレーザ放射が出る。
AVOID EXPOSURE-LASER
被ばくを回避のこと - この
P-00377-001
FROM THIS APERTURE
RADIATION IS EMITTED
開口からレーザ放射が出る。
CHIBA 278-0016 JAPAN
95-3 FUTATSUKA NODA-CITY
MODEL No.
P-00161-002
CLASS Ⅳ LASER PRODUCT
SERIAL No. LABEL
Hz
1
ms
Hz
INPUT POWER VOLTS
MAX. RMS AMPS
MAX. AVERAGE POWER
MAX. PULSE ENERGY
PULSE DURATION
WAVELENGTH
PULSE REPETITION RATE
MFG:MONTH , YEAR
,
VAC
Phase 50/60Hz
A
W
J
-
-
1.064
μm
AMADA WELD TECH CO.,LTD.
MANUFACTURED BY:
(Also stuck on the reverse side, and at the top surface of the high
voltage protection cover inside of the right side surface of the main
unit)

14 ML-2050A/2051A/2150A
Sticking Warning/Danger Labels
DANGER
P-1264
LASER RADIATION
HAZARD WHEN THE
COVER IS REMOVED.
LASER BEAM MAY
CAUSE BURNS AND
EYE DAMAGE.
TURN CLOCKWISE TO SECURE THE FIBER OPTIC.
MATCH THE KEY TO THE GROOVE, INSERT AND
P-1212
KEYGROOVE
注 意
PLEASE REFER TO THE USER'S MANNUAL FOR DETAILS.
CAUTION
P-1517
精製水をタンクに入れた後に付属の落とし蓋を
水面に浮かべてから使用してください。
詳細は取扱説明書をお読みください。
FLOATING PANEL ON THE WATER.
AFTER FILLING WITH DI WATER, FLOAT THE ATTACHED
EXPOSURE TO VISIBLE AND/OR INVISIBLE LASER RADIATION
MAY OCCUR WHEN THE INTERLOCK SWITCH IS DEFEATED.
A LIGHTED LED INDICATES INTERLOCK SWITCH IS DEFEATED.
DIRECT OR SCATTERED RADIATION.
AVOID EYE OR SKIN EXPOSURE TO
P-1213
IF INTERLOCK IS DEFEATED
PERSONNEL MAY BE EXPOSED
TO ELECTRICAL SHOCK HAZARD.
P-1534
EXPOSURE TO VISIBLE AND/OR INVISIBLE
LASER RADIATION MAY OCCUR WHEN THE
INTERLOCK SWITCH IS DEFEATED.
A LIGHTED LED INDICATES INTERLOCK
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION.
SWITCH IS DEFEATED.
P-1535
DISCONNECT POWER AND WAIT 5MIN.
BEFORE SERVICING
HIGH VOLTAGE
P-1380
P-1388
HIGH
VOLTAGE
Inside of the top surface of the main unit
(top surface of the branch unit cover)
Inside of the top surface of the main unit
(top surface of the branch unit cover)
Rear surface of the control panel
Inside of the right side surface of the main unit
(top surface of the power supply unit cover)
Inside of the front surface of the main unit
(under the power input terminal and under the breaker)
Inside of the right side surface of the main unit
(top surface of the frame)
Inside of the left side surface of the main unit
(top surface of the frame)
Inside of the rear surface of the main unit
(top surface of the frame)
Rear surface of the control panel
Inside of the top surface of the main unit
(top surface of the branch unit cover)
Inside of the top surface of the main unit
(top surface of the branch unit cover)
Inside of the front surface of the main unit
(top surface of the cooling water tank)
Inside of the front surface of the main unit
(front surface of the cooling water tank)
Inside of the top surface of the main unit
(top surface of the laser chamber)
Inside of the front surface of the main unit
(under the breaker)
Inside of the right side surface of the main unit
(top surface of the frame)
Inside of the left side surface of the main unit
(top surface of the frame)
Inside of the rear surface of the main unit
(top surface of the frame)
Rear surface of the control panel

Introduction Part

1. YAG Laser
17
ML-2050A/2051A/2150A
Introduction Part Installation and
Preparation Part Operating Part Maintenance Part Appendixes
Chapter 1
●Overview of the YAG Laser Welder
1. YAG Laser
Laser means the equipment to generate powerful light by amplifying light
(electromagnetic wave) or means this light itself. Laser can be classied into various
types by light generating material. Among these types, the typical type as welding
laser in the industrial eld is Nd: YAG laser, which is generally called YAG laser. The
name of Nd: YAG laser originates from the fact that this laser is generated by doping
Neodymium with the Yttrium Aluminum Garnet crystal.
The YAG laser wavelength is 1064 nm of near infrared rays that are invisible to man.
Most of laser equipment for laser welding belongs to class 4 laser that is the most
hazardous in the classication of laser products specied in JIS. When YAG laser
light greets the eye, it is focused by crystalline lens and reaches the retina, thereby
inviting a loss of eyesight. Do not look at the YAG laser light in any case. Because
both beams and scattered light are hazardous, do not touch or look at them.
To check where invisible laser is irradiated on the workpiece, red guide light is
generally mounted in the laser equipment. When the output unit is provided with a
CCD camera, cross lines are generally displayed on the monitor and the cross point
of these cross lines is an irradiation point. In this laser, a red point appears on the
workpiece when guide light is output.
Introduction Part
Chapter 1 Overview of the YAG Laser Welder

18 ML-2050A/2051A/2150A
2. Mechanism of the YAG Laser
2. Mechanism of the YAG Laser
The YAG Laser for welding consists of a power supply, cooler, oscillator, optical ber,
output unit, etc. Laser light can be transferred to a place remote from the main unit
by optical ber, so that only the optical ber and output unit can be mounted in the
manufacturing line for welding. Multiple beams of laser light can be split from single
laser equipment to multiple optical bers.
Powersharing
When single laser light is split into multiple beams by using a beamsplitter, multiple
workpieces (or multiple positions of a single workpiece) can be simultaneously
welded. This method is called "powersharing."
Supposing that the energy of a single laser light beam is 100%, 50% laser light is
simultaneously irradiated when the number of deliveries is 2, or 33% laser light is
simultaneously irradiated when the number of deliveries is 3. Up to 3 deliveries are
available for this laser equipment at powersharing.
Timesharing
100% energy is applied to multiple workpieces by changing the reection angle with
the mirror of the timesharing unit without splitting single laser light. This welding
method for multiple workpieces is called "timesharing."
For example, if when the number of deliveries is 3, laser light is irradiated once each
from 3 optical fibers. Up to 3 deliveries are available for this laser equipment at
timesharing.
Common Laser Equipment Conguration
Example of 3 deliveries
Optical ber
Output unit
Workpiece
Oscillator
YAG rod
Mirror
Cooler
Beamsplitter
Power supply
Excitation lamp
Power monitor
Input unit

3. Functions of the ML-2050A/2051A/2150A
19
ML-2050A/2051A/2150A
Introduction Part Installation and
Preparation Part Operating Part Maintenance Part Appendixes
3. Functions of the ML-2050A/2051A/2150A
⇒Laser power feedback control and optional waveform control functions
■ The Laser can handle a wide variety of workpieces. Up to 32 di󰀨erent settings
for weld schedules using waveform control are available.
■ The welding schedule can be momentarily switched. This permits high-speed
and high-quality welding.
■ The ML-2051A uses very thin optical ber that makes it suitable for welding
with a small spot diameter.
■ Up to 3 deliveries of laser output, including powersharing and timesharing, are
available. (The beamsplitter and branch shutter are options.)
■ Powersharing permits obtaining uniform outputs for each delivery without
energy loss.
⇒Simple operations and maintenance
■ For greater convenience, the Laser is designed to allow the operator to work
on the Laser from the front for cumbersome tasks such as wiring and filter
replacement.
■ As welding schedules are entered on the liquid crystal display, the user can
perform operations easily and accurately.
■ A variety of input and output signals allow the Laser to be connected to
automatic machines.
■ Both the laser energy (J) and its mean power (W) are monitored. If the desired
energy range has been preset and the laser energy is out of the range, the
trouble signal is output. This function is provided for quality control purposes.
■ Use of high-precision optical fiber eliminates the optical axis adjustment
usually needed every time the ber is removed and reinstalled.
■ Optical ber detection is available to check ber connection and breakage. (An
optional output unit with ber sensor is required.)
■ Using the external communication function permits managing data such as
welding schedules and monitor values in centralized form.
⇒The factory environment can be improved by space saving.
■ The laser power supply, oscillator, and cooler are integrated into a single piece
for easy transport and installation of the Laser.
■ The Laser does not require external cooling water or piping.
⇒The Laser conforms to the following standards.
In compliance with IEC Standards IEC60825-1 “Safety of laser products Part1:
Equipment Classications, requirements and use’s guide”
Chapter 1 Overview of the YAG Laser Welder

20 ML-2050A/2051A/2150A
4. Product Composition
4. Product Composition
Packaging
The product is divided into the main unit and accessories and these are packed in 2
packages. The respective dimensions and mass are as follows.
Dimensions Mass (including
packaged products)
Package for main unit Approx. 840 (H) x 440 (W) x 800 (D) mm Approx. 76 kg
Package for accessories Approx. 580 (H) x 310 (W) x 460 (D) mm Approx. 23 kg
Checking the Packaged Products
Make sure that all the packaged products are included.
Package for main unit
Product name Model No. Q’ty
YAG Laser Welder ML-2050A/2051A/2150A 1
Package for accessories
Part name Model No. Q’ty
Flashlamp MLD-0902 1
Glass plate A4-00719 1
Ion-exchange resin rell MLF-0020 1
Ion-exchange resin replacing tool MLF-0005 1
Cooling water (Puried water, 20L) MLU-0604-00 1
YAG laser-protective glasses YL-717 YAG OD7 1
Ball point screwdriver
BS 2.5mm 1
BSL 3mm 1
BS 4mm 1
Water feed hand pump TP-0002 1
Gloves Emboss L 2
Danger, warning, caution labels
P-00374-001 2
P-00474-001 2
P-0211 2
P-0212 2
P-0213 2
P-00377-001 2