Unitek Miyachi LW250 Manual

USER'S MANUAL NO. 990-605
REVISION B: May, 1997
OPERATION, MAINTENANCE
AND SERVICE MANUAL
FOR THE
LW250 PULSED Nd: YAG LASER
Copyright © 1997
Unitek Miyachi Corporation
All Rights Reserved
1820 South Myrtle Avenue, P.O. Box 5033, Monrovia, CA 91017-7133
Telephone: [phone] FAX: [phone]

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 i
Copyright © 1997, Unitek Miyachi Corporation
The engineering designs, drawings and data contained herein are the proprietary work of
UNITEK MIYACHI CORPORATION and may not be reproduced, copied, exhibited or
otherwise used without the written authorization of UNITEK MIYACHI CORPORATION.
Printed in the United States of America
Revision Record
Revision EO Date Basis of Revision
A 16887 1/97 Original publication
B 17016 3/97 Add steam-distilled water
applicability. Moderate changes
to water drainage procedures.

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 ii
CDRH COMPLIANCE STATEMENT
The Unitek Miyachi Corporation LW250 Pulsed
Nd:YAG 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), standard 21
CFR 1040.10 for Class IV laser devices. Please refer to
CDRH Accession #9311157-03.

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 iii
FOREWORD
Thank you for purchasing a Unitek Miyachi Corporation
LW250 Pulsed Nd: YAG Laser.
Upon receipt of the LW250 Laser, please thoroughly
inspect it for shipping damage prior to it's installation.
Should there be any damage, please immediately contact
the shipping company to file a claim, and notify Unitek
Miyachi Corporation at:
Unitek Miyachi Corporation
1820 South Myrtle Ave.
Monrovia, CA 91017-7135
Phone: [phone]
FAX: [phone]
The contents of this manual are subject to change without
notice.
If you have any questions about the contents of this
manual, or find any errors or omissions in it, please
notify Unitek Miyachi Corporation.
Unitek Miyachi is not responsible for any losses due to
improper use of this product.

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 iv
CAUTION
This instruction manual describes how to operate, main-
tain and service the LW250 Laser, and provides instruc-
tions relating to it's SAFE use. Procedures described in
this manual MUST be performed as detailed by QUALI-
FIED and TRAINED personnel.
For SAFETY, and to effectively take advantage of the
full capabilities of the LW250 Laser, please read this
instruc-tion manual and the Laser Safety Manual
thoroughly before attempting to use the LW250 Laser.
Procedures other than those described in this manual or
not performed as prescribed in this manual, may expose
personnel to electrical hazards and/or laser radiation
hazards.
After reading this manual, retain it for future reference
when any questions arise regarding the proper and SAFE
operation of the LW250 Laser.

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 v
CONTENTS
CHAPTER 1: Precautions
Prior to Using The LW250 Laser .......................................... 1-1
Installation Site and Electrical Supply ...................................... 1-1
Carrying The LW250 Laser .............................................. 1-1
HandlingTheFiberOpticCables ......................................... 1-1
Removal of Oscillator Head Hold Down Brackets ............................ 1-3
OperationinColdWeather .............................................. 1-3
LaserOperationArea................................................... 1-4
OperatingtheLaser .................................................... 1-4
LaserSafetyOfficer.................................................... 1-4
CautionsandWarningIndications......................................... 1-4
Cleanliness ........................................................... 1-4
DesignIntegrity ....................................................... 1-4
Maintenance.......................................................... 1-4
CHAPTER 2: System Description
SystemFeatures ....................................................... 2-1
ExternalControlsandIndicators .......................................... 2-2
StatusPanel .................................................... 2-2
EmergencyStopButton ........................................... 2-3
DoorLatch ..................................................... 2-3
` MainPowerSwitch .............................................. 2-3
ControlKeySwitch .............................................. 2-3
ControlPendant ................................................. 2-3
InternalControlsandIndicators .......................................... 2-5
Coolant System Components and Controls .................................. 2-6
ExternalPanels ....................................................... 2-8
Laser Oscillator Head .................................................. 2-9

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 vi
CONTENTS (continued)
DisplayScreenDescriptions ............................................ 2-11
Schedule/MonitorScreen......................................... 2-11
MaintenanceScreen ............................................. 2-12
StatusScreen .................................................. 2-13
MonitorScreen ................................................ 2-14
CHAPTER 3: I/O SIGNAL INTERFACE
Input Signals ................................................... 3-1
ContactSignals ........................................... 3-2
TransistorSignals ......................................... 3-3
Input Signal Specifications, EXT. I/O Connector (1) .............. 3-3
Input Signal Specifications, EXT. I/O Connector (2) .............. 3-7
RemoteInterlockConnector ................................. 3-7
OutputSignals .................................................. 3-7
OutputSignalCircuits ............................................ 3-8
OutputSignalSpecifications ....................................... 3-8
OutputSignalSpecifications,EXT.I/OConnector(1) ............. 3-8
OutputSignalSpecifications,EXT.I/OConnector(2) ............ 3-10
CHAPTER 4: SYSTEM TIMING
Operation from the Control Pendant: Simultaneous Splitting of the
LaserBeamIntoTwoBranches........................................... 4-1
Operation from External Signals: Simultaneous Splitting of the
LaserBeamIntoTwoBranches........................................... 4-1
Operation from External Signals: Simultaneous Time Periods and
Simultaneous Splitting of the Laser Beam Into Two Branches ................... 4-3
Repeat Operation: Simultaneous Splitting of the Laser Beam Into Two Branches .... 4-4
Repeat Operation at High Speed (25 PPS Minimum) .......................... 4-5
CHAPTER 5: GETTING STARTED
Removing the Laser Head Oscillator Fittings ................................ 5-1
PowerCableConnections ............................................... 5-1
PreparingtheCoolingSystem ............................................ 5-2

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 vii
CONTENTS (continued)
Water Supply Replenishment ............................................ 5-2
OpticalFiberConnection................................................ 5-3
ConnectionoftheInterlockSignalCable ............................. 5-3
BeforeConnectingtheFibers ...................................... 5-3
ConnectingFibertotheFocusingUnit ............................... 5-3
Input Focusing Adjustment, Z-Axis ................................. 5-5
Input Focusing Adjustment, X-Y Axes ............................... 5-5
ConnectiontoFinalFocusingUnit .................................. 5-5
CHAPTER 6: Operating Instructions
PreparationforOperation ............................................... 6-1
TurningPowerONandOFF ............................................. 6-1
WaveformControl ..................................................... 6-5
LaserOutput ................................................... 6-5
High Speed Operation, FLASH1 FLASH2 .......................... 6-6
High Speed Operation, FLASH1 FLASH2 .......................... 6-7
Applying Multiple Weld Schedules .................................. 6-8
SettingtheOpeningandClosingofShutters................................ 6-11
SelectionWiththeControlPendant................................. 6-11
SelectionWithExternalControl ................................... 6-12
Simultaneous Laser Beam Splitting ................................. 6-12
Laser Beam Time Splitting ....................................... 6-12
LaserBeamTimeSharing ........................................ 6-12
Emitting the Laser Beam ............................................... 6-12
Chapter 7: User Maintenance
Precautions ........................................................... 7-1
CoolerMaintenance .................................................... 7-1
Air Filter Cleaning ............................................... 7-1
Water Draining Occasions ......................................... 7-2
Replacing the Ion Exchange Resin Cartridge and the
Deionized or Steam-Distilled Water ........................... 7-2
Draining the Deionized or Steam-Distilled Water ...................... 7-2

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 viii
CONTENTS (continued)
Cleaning or Replacing the Small Water Filter .......................... 7-3
ReplacingtheIonExchangeResinCartridgeandCoolantWater........... 7-4
ReplacingtheExistingFlashLamp .................................. 7-5
Replacing the Existing Deionized or Steam-Distilled Water .............. 7-5
Coolant Water Draining: For Long Term Storage; When Transporting
TheLaser;orWhenTemperatureDropsBelow0°C ............... 7-6
CleaningtheSolenoidValveStrainer ................................ 7-7
DrainingCoolingWater........................................... 7-8
ReplacingtheFlowrateController .................................. 7-8
Chapter 8: Service
Precautions ........................................................... 8-1
FlashLampRepalcement................................................ 8-1
AlignmentoftheBanIntotheFiberOpticCable ............................. 8-4
Preparation ..................................................... 8-4
Z-AxisAdjustment............................................... 8-5
X-YAxesAdjustment ............................................ 8-7
CleaningtheOptics .................................................... 8-9
Optical Component Cleaning Tools and Materials ...................... 8-9
Removing the Input Focusing Unit Optics ............................ 8-9
CleaningaDustyorDry-DirtCoatedOptic ......................... 8-10
CleaningaContaminatedOptic.................................... 8-11
Reassembling the Optical Components .............................. 8-11
OpticalFiberCleaning........................................... 8-11
Power Supply Service ................................................. 8-12
Backup Battery Replacement ...................................... 8-12
Fuse Replacement .............................................. 8-13
Troubleshooting ...................................................... 8-13
MalfunctionIndications.......................................... 8-13
MalfunctionCheckList .......................................... 8-13
RepairService ....................................................... 8-17
APPENDIXA:TECHNICALSPECIFICATIONS ................................ A-1
APPENDIXB:EXTERNALCOMMUNICATIONSINTERFACESPECIFICATIONS ....B-1
APPENDIXC:LASERSCHEDULEDATATABLE ...............................C-1
ALPHABETICALSUBJECTINDEX ......................................INDEX-1

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 ix
ILLUSTRATIONS
Figure Title Page
1-1 Oscillator Head Hold Down Brackets ................................ 1-3
2-1 ExternalControlsandIndicators .................................... 2-2
2-2 ControlPendantControls.......................................... 2-3
2-3 InternalControls ................................................ 2-5
2-4 Cooling System Components and Controls ............................ 2-7
2-5 BackCover..................................................... 2-8
2-6 TopCovers..................................................... 2-8
2-7 Laser Oscillator Head ............................................ 2-9
2-8 BranchUnitCoverPlate ......................................... 2-10
2-9 TypicalSchedule/MonitorScreen .................................. 2-11
2-10 TypicalMaintenanceScreen ...................................... 2-13
2-11 TypicalStatusScreen............................................ 2-13
2-12 TypicalMonitorScreen .......................................... 2-14
3-1 Input Contact Signals on Connector EXT. I/O (1) ...................... 3-2
3-2 Input Contact Signals on Connector EXT. I/O (2) ...................... 3-3
3-3 Input Transistor Signals on Connector EXT. I/O (1) ..................... 3-4
3-4 Input Transistor Signals on Connector EXT. I/O (2) ..................... 3-5
3-5 OutputSignalsontheEXT.I/O(1)Connector ......................... 3-9
3-6 OutputSignalsontheEXT.I/O(2)Connector ........................ 3-10
5-1 Laser Oscillator Head Fittings ...................................... 5-1
5-2 PowerCableConnections ......................................... 5-1
5-3 CoolingSystemPreparation ....................................... 5-2
5-4 InterlockSignalCableConnection .................................. 5-3
5-5 OpticalFiberInstallation .......................................... 5-4
5-6 FiberConnectorFastening......................................... 5-4
5-7 FinalFocusingUnitConnection .................................... 5-5
6-1 ScreenSelection................................................. 6-4
6-2 Waveform Composition ........................................... 6-5
6-3 CapacitorBankSwitching ......................................... 6-5

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 x
ILLUSTRATIONS (continued)
Figure Title Page
6-4 LaserOutputControl ............................................. 6-6
6-5 LaserOutputwithVOLTAApproximatelyEqualtoVOLTB ............ 6-7
6-6 LaserOutputwithVOLTASetSubstantiallyDifferenttoVOLTB ........ 6-8
6-7 CapacitorDischargeCycleTimeComputation ......................... 6-9
6-8 LaserOutput,SingleShot ........................................ 6-10
6-9 LaserOutputwithWaveformControl ............................... 6-11
6-10 Fiber Guide Installation Precaution ................................. 6-13
7-1 Air Filter Removal ............................................... 7-1
7-2 Cooling System Components ....................................... 7-3
7-3 IonExchangeResinCartridgeRemoval .............................. 7-4
7-4 LaserChamberVacuumRelease .................................... 7-5
7-5 PumpHoseConnections .......................................... 7-6
7-6 SolenoidValveCleaning .......................................... 7-7
7-7 SolenoidValveoperator .......................................... 7-8
7-8 FlowRateControllerLocation ..................................... 7-8
8-1 SettingtheMaintenanceMode ..................................... 8-1
8-2 RemovingtheMirrorCylinder ..................................... 8-2
8-3 RemovingtheFlashLamp ......................................... 8-3
8-4 BranchUnitCoverPlateLocation................................... 8-5
8-5 MountingtheFiberscope .......................................... 8-5
8-6 AdjustingFocus ................................................. 8-6
8-7 AdjustingtheGuideBeam......................................... 8-6
8-8 LockNutLocation ............................................... 8-8
8-9 GuideBeamAdjustment .......................................... 8-8
8-10 Optical Component Servicing Tools and Materials ...................... 8-9
8-11 Removing the Input Unit Optics ................................... 8-10
8-12 CleaningaDirtyOptic ........................................... 8-10
8-13 CleaningaContaminatedLens .................................... 8-11
8-14 RemovingtheOpticalFiber....................................... 8-11
8-15 CleaningtheOpticalFiber........................................ 8-12
8-16 Backup Battery Location ......................................... 8-12

LW250 Pulsed Nd: YAG LASER
990-605 REV B: May, 1997 xi
TABLES
Table Title Page
1-1 MinimumBendRadiusforSpecifiedCoreDiameter .................... 1-2
1-2 Maximum Allowable Input Energy/Power Per Fiber .................... 1-2
7-1 Water Draining Occasions ......................................... 7-4
8-1 MinimumBendRadiusforOpticalFibers............................. 8-6
8-2 AdjustmentScrewRingTurnsRequiredforDefocus .................... 8-7

LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997 1-1
CHAPTER 1
PRECAUTIONS
Prior To Using The LW250 Laser
NOTE: Please have all personnel who will be working with the
LW250 Laser read this manual and the Laser Safety User’s
Manual, Part No. 990-502, thoroughly before attempting to operate
or maintain the laser.
WARNING: Operating, adjusting, maintaining or servicing the
LW250 Laser in a manner other than described in this manual may
expose personnel to laser radiation or electrical hazards.
Installation Site And Electrical Supply
Install the LW250 Laser securely on a firm, level floor that is free from vibration.
Use 208VAC or 230VAC, 50Hz/60Hz, 3-phase power, with a minimum of 1.5
kVA capacity.
Install good grounding.
CAUTION: When power is turned on, a surge current may be
generated. Use a circuit breaker that has a rating of 10 amps or
greater.
Carrying the LW250 Laser
When you carry the laser, hold the bottom of the housing between the front and back casters. Do
not hold the laser by the maintenance door; it may break if you try to lift or carry the laser with
it.
Handling The Fiber Optic Cables
Optical fibers may be damaged and become unusable when they are bent beyond their minimum
bend radius or subjected to the shock of a strong impact (refer to Table 1-1).

CHAPTER 1: PRECAUTIONS
LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997 1-2
Handling The Fiber Optic Cables (continued)
Table 1-1. Minimum Bend Radius for Specified Core Diameter
Core Diameter
(mm)
Minimum Bend
Radius (mm)
0.4 100
0.6 150
0.8 200
1.0 250
1.2 300
The LW250 Laser uses either SI or GI core fibers. The maximum input energy/power allowed
per fiber is dependent upon core type and core diameter. Input energy/power values in excess of
those listed in Table 1-2 may cause damage to the fibers. Length specifications per fiber are: 5
m, 10 m, or 15 m.
Table 1-2. Maximum Allowable Input Energy/Power Per Fiber
Core Diameter
(mm)
Single Fiber Output Dual Fiber Output
Energy (J) Power (W) Energy (J) Power (W)
0.4 30 100 15 20
0.6 50 200 30 60
0.8 60 250 50 120
1.0 70 300 70 240
1.2 80 350 90 480
Dirty or dusty end surfaces on the optical fibers will cause damage to the fibers. The damaged
surfaces of the fibers can also cause contamination to adjacent lenses. Do not remove the rubber
fiber end caps until it is necessary.

CHAPTER 1: PRECAUTIONS
LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997 1-3
L25LHDBR.WPG
Figure 1-1. Oscillator Head Hold Down Brackets
Removal Of Oscillator Head Hold Down Brackets
To fasten the base of the oscillator head during transportation, yellow hold down brackets are
attached as shown in the Figure 1-1. Remove these brackets when installing the LW250 Laser.
Retain them for future use when transporting or relocating the laser. Use of these brackets will
help to prevent misalignment and damage to the laser oscillator caused by severe vibrations.
Operation In Cold Weather
When the temperature drops below 0°C, the water inside the LW250 Laser’s cooling system can
freeze and may damage the laser. In cold regions, take special care to keep the ambient tempera-
ture where the laser is located above 0°C. If the temperature drops below 0°C, perform the pro-
cedure detailed in Chapter 7 entitled Coolant Water Draining: For Long Term Storage; When
Transporting the Laser; or When The Temperature Drops Below 0°C.
When it is cold, a rapid temperature change caused by a heating system, for example, may cause
dew condensation on the end faces of the Nd:YAG rod and on other optical surfaces. This will
attract dust and can cause damage to the surfaces of the optics. CAUTION :Avoid rapid
temperature changes.
WARNING
Be sure to turn off high voltage and the laser guide beam when
checking the rod end and/or the mirror. If you do not turn them off,
you are exposed to the possibility of electric shock or blinding.
If dew condensation is suspected, check the end surfaces of the laser rod and the optics. Inspect
the rod's end surfaces by placing white paper on one end and using a dental mirror on the other
end. You will need to remove the beam path covers on both ends of the laser cavity to do this
inspection.

CHAPTER 1: PRECAUTIONS
LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997 1-4
Laser Operation Area
Establish and control a dedicated laser operation area. The person responsible for the area (refer
to Laser Safety Officer later in this chapter) must isolate the laser operation area from other work
areas and display signs warning that the laser operation area is off limits to unauthorized person-
nel.
Operating the Laser
When operating the laser unit, always wear protective goggles having an optical density of at
least 6 at a wavelength of 1064 nanometers.
Laser Safety Officer
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 the laser is operated only by
qualified and authorized personnel.
Caution and Warning Indications
Make sure proper warning signs and warning lights are installed in and around the laser
installation. Also, make sure access doors to the laser area are interlocked to the laser. Locate
danger labels and other warning/caution notices on the door of the location where this laser will
be installed to indicate that a laser will be used in this location.
Cleanliness
The exterior of the laser should be kept clean. Use a dry cloth or, if heavily soiled, use a cloth
moistened with a mild detergent or alcohol. Do not use paint thinner, benzine or acetone.
Design Integrity
Do not modify the laser without prior written approval from Unitek Miyachi Corporation.
Maintenance
Before performing any maintenance on the laser, please read Chapter 7, User Maintenance,
thoroughly. Use the appropriate tools for terminating the connecting cables, being careful not to
nick the wire conductors.

LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997 2-1
CHAPTER 2
SYSTEM DESCRIPTION
System Features
The LW250 is an ultra-compact, pulsed, Nd:YAG laser designed as a precision spot and seam
welder. It incorporates the following features in its design:
The operator control panel can store up to 16 different weld schedules. The waveform of each
schedule can also be controlled within specified limits, allowing various work pieces to be
processed under optimum conditions.
The high pulse repetition rate of the laser (200 pps maximum) allows high-speed seam
welding to be accomplished with a broad range of metals.
The ultra compact design incorporates the laser head, power supply and internal cooling
system in one unit, allowing the unit to be moved and installed easily. An external cooling
water supply is required.
Electrical connection and cooling system servicing are accessed from the front maintenance
door and side panels, allowing the operator to easily perform tasks such as wiring and ion-
exchange resin cartridge replacement.
The operator can easily and correctly operate the machine and input the welding schedules
with the control panel.
The built in power monitor displays both energy per pulse (Joules) and average power
(watts). Upper and lower limits for the emitted energy can be preset for accurate control of
the weld quality.
Using its input/output interface, the LW250 can be operated with fully automated machinery.
The laser beam can be divided into up to six outputs.
The ultra compact design of the LW250 Laser requires a minimum of space for installation.
The screen on the LW250 Laser controller allows the operator to easily and accurately set
weld schedules and laser process parameters.
Up to 30 LW250 Lasers can be linked via a host computer in a production environment.

CHAPTER 2: SYSTEM DESCRIPTION
LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997 2-2
L25CNTLR.WPG
Figure 2-1. External Controls and Indicators
External Controls and Indicators
Figure 2-1 illustrates the controls and indicators on the front of the LW250 Laser.
Status Panel. The functions of the status panel indicators are as follows:
POWER: When the MAIN POWER switch is turned ON, this indicator lights to signal
the power ON condition.
HIGH VOLTAGE: This lamp indicates that the high voltage is applied to the laser
oscillator unit.
READY: This lamp lights when the YAG laser is charged to the voltage set by the
control pendant.
MAIN SHUTTER: This lamp lights when the main (resonator) shutter is open.
SHUTTER 1 through SHUTTER 4: These lamps light when their associated shutter is
open.
Emergency Stop Button. If this switch is pressed in an emergency, the operation of the

CHAPTER 2: SYSTEM DESCRIPTION
LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997 2-3
L25CPEND.WPG
Figure 2-2. Control Pendant Controls
LW250 Laser is interrupted. The LW250 is set to the condition set when the CONTROL key
switch is set to OFF. To return to the normal condition, turn the CONTROL key switch to the
right (RESET).
Door Latch. When you press the button under this handle, the handle is projected. Grasp
the handle to open the front door. If the front door is closed and you press the handle, the front
door is locked.
Main Power Switch. When you set this switch to the ON position, laser power is turned
on and the POWER indicator on the status panel lights.
Control Key Switch. When you turn the CONTROL key switch to the ON position while
the main power is turned on, the laser is operable. While the laser is not in use, set the
CONTROL key switch to the OFF position. CAUTION: Remove the CONTROL key and
return it to the custody of the Laser Safety Officer while the laser is not in use.
Control Pendant. Refer to Figure 2-2. Use the control pendant to set and indicate laser
process parameters. The functions of the controls are as follows:

CHAPTER 2: SYSTEM DESCRIPTION
LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997 2-4
Control Pendant (continued)
Brightness Adjustment: Use this screwdriver adjustment to adjust the brightness of the
display.
Display: Various operational and diagnostic data are displayed on this screen.
Control Pendant Power Connector: Connects the control pendant to the laser power
supply via the control pendant power cable.
LASER START/STOP Key: Press this key once while the High Voltage is applied
(HIGH VOLTAGE status indicator ON) and the laser beam is output. Press this key a
second time to turn off the laser. Note: The control changeover signal at pin 30 of the
EXT I/O (1) connector is turned off. (see Chapter 3).
TROUBLE RESET Key. When trouble (an error) occurs, correct the trouble and press
this key to reset the laser.
CURSOR Keys: Use these keys to move the display cursor up, down, right and left.
The item selected will be highlighted by the cursor.
ON+/OFF- Key: Use this key to raise or lower the value of a selected item, or to
change the ON/OFF condition of a particular function.
If you press the ON+ side when a value is set, the value will increase. Conversely, the
value will decrease if you press the OFF- side. After you select a function, the function
is turned on when you press the ON+ side. Conversely, the function will turn off when
you press the OFF- side.
MENU Key: Press this key to change the menus on the control pendant display screen.
ENTER Key: Use this key to set data and ON/OFF function in the control pendant. The
control pendant will not recognize any changed data or function unless this key is
pressed following the keyed-in change.
EMERGENCY STOP Button: Press this button in an emergency to stop operation of
the LW250 Laser. It is a parallel function to the EMERGENCY STOP switch on the
control console and the power supply chassis.