Unitek Miyachi LM45 Nd User manual

USER’S MANUAL NO. 990-518
REVISION B: December, 1999
HARDWARE MANUAL
FOR THE
LM45 Nd:YAG LASER MARKER

LM45 Nd:YAG LASER MARKER
ii 990-518
Copyright © 1999, 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 17962 4/5/99 Original publication
B 17910 12/99 Revise specifications

LM45 Nd:YAG LASER MARKER
990-518 iii
CDRH COMPLIANCE STATEMENT
The Unitek Miyachi Lasers LM45 Nd:YAG Laser Marker 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.

LM45 Nd:YAG LASER MARKER
iv 990-518
FOREWORD
Thank you for purchasing a Unitek Miyachi Lasers LM45
Nd:YAG Laser Marker.
Upon receipt of the unit, please thoroughly inspect it for
shipping damage prior to its installation. Should there be any
damage, please immediately contact the shipping company to
file a claim, and notify us at:
Unitek Miyachi Lasers
1820 South Myrtle Ave.
P. O. Box 5033
Monrovia, CA 91017-7133
Phone: [phone]
FAX: [phone]
E-mail: [email protected]
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
Lasers.
Unitek Miyachi Lasers is not responsible for any losses due to
improper use of this product.

LM45 Nd:YAG LASER MARKER
990-518 v
Safety Precautions
Before using, read the "Safety precautions"
carefully to understand the correct method of
use for this equipment.
•These precautions are given 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.
•The meaning of the words and symbols is
as follows.
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.
These symbols denote
"prohibition". They are warnings
about actions out of the scope
of the warranty of the products.
These symbols denote actions
which operators must take.
Each symbol with a triangle
denotes that the contents gives
notice of DANGER, WARNING
or CAUTION to the operator.
Do not touch the inside of the laser marker unnecessarily.
Since source voltage of single-phase 200V or 220V is applied to the laser marker,
high voltages are applied to its inside. Do not touch the inside of the laser marker
unnecessarily with the power turned on. You may receive an electric shock.
Never disassemble, repair or modify the laser marker.
These actions can cause electric shock and fire. 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.
!
CAUTION
!
DANGER
!
DANGER
!
WARNING
!

LM45 Nd:YAG LASER MARKER
vi 990-518
Wear protective glasses.
Be sure to wear protective glasses while using the laser marker.
Even if you wear them, you may lose your sight if the laser beam enters your eyes directly.
Do not expose your skin to the laser beam.
Your skin may be severely burnt.
Use proper tools (wire strippers, pressure wire connectors, etc.) for termination of the
connecting cables.
Do not cut the wire conductor. A flaw on it can cause fire and electric shock.
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 fire.
Do not use a damaged power cable, connecting cable or plug.
A damaged cable or a plug can cause electric shock, short circuits and fire. If any part
needs to be repaired, consult Unitek Miyachi Lasers. or your distributor.
Use only specified cables.
Use of a cable of insufficient capacity can cause fire.
Connect the cables securely.
Insecure connection of a cable can cause fire and electric shock.
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 fire. If such a trouble occurs,
immediately consult Unitek Miyachi Lasers. or your distributor.
Ground the laser marker.
If the laser marker 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).
!
!
!
!
!
!
WARNING
!

LM45 Nd:YAG LASER MARKER
990-518 vii
Do not splash water on the laser marker.
Water splashed over the electric parts, can cause electric shock and short circuits.
Install the laser marker on a firm and level surface.
If the laser marker falls or drops, injury may result.
Do not place a water container on the laser marker.
If water spills, insulation of the laser marker will deteriorate, and that can cause electric
leaks and fire.
Keep combustible matter away from the laser marker.
Spatter can ignite combustible matter. If it is impossible to remove all combustible matter,
cover it with non-combustible material.
Keep a fire extinguisher nearby.
Keep a fire extinguisher in the laser marking shop in case of fire.
Maintain and inspect the laser marker periodically.
Maintain and inspect the laser marker periodically, and repair any damage before starting
operation.
Do not apply the laser beam to combustible materials.
To avoid risk of fire never apply the laser beam to flammable or combustible materials.
Keep the power plug clean and insert it all the way.
If the plug is covered with dust or is not inserted completely, it will become hot and can
cause fire.
When inserting or disconnecting the plug, hold the body.
If the cable is pulled to disconnect the plug, it may be broken, and that can cause electric
shock and fire.
When leaving the laser marker unused for a long time, disconnect the power plug from the power
outlet.
Deterioration of insulation can cause electric shock, leakage and fire.
!
!
!
!
!
!
!
CAUTION
!

LM45 Nd:YAG LASER MARKER
viii 990-518
PRECAUTIONS
General
This instruction manual describes the operation and maintenance of the
LM45 Nd:YAG Laser Marker, and provides instructions relating to its SAFE
use. Procedures described in this manual MUST be performed as detailed by
QUALIFIED and TRAINED personnel.
For SAFETY, and to effectively take advantage of the full capabilities of the
LM45 Nd:YAG Laser Marker, please read this instruction manual and the
Laser Safety Manual, Part No. 990-509, 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 LM45 Nd:YAG Laser
Marker.
Operation
When operating the Laser Marker unit, always wear protective goggles having
an optical density of at least 6 at a wavelength of 1064 nanometers.
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 Marker safely. The LSO must take charge of the key to the
key switch to ensure that the Laser Marker is operated only by qualified and
authorized personnel.
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 Marker, read Chapters 4,
User Maintenance; and Chapter 5, Service, 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 hazards and/or
laser radiation hazards.
Do not modify the Laser Marker without prior written approval from Unitek
Miyachi Lasers.

LM45 Nd:YAG LASER MARKER
990-518 ix
CONTENTS
Revision Record................................................................................................................................. ii
CDRH Compliance Statement ........................................................................................................... iii
Foreword............................................................................................................................................ iv
Precautions......................................................................................................................................... v
CHAPTER 1: System Description................................................................................................ 1-1
Section I: Features................................................................................................................... 1-1
Section II: System Components................................................................................................ 1-2
Controller ............................................................................................................................... 1-2
Front Panel....................................................................................................................... 1-2
Rear.................................................................................................................................. 1-3
Control Panel ................................................................................................................... 1-3
Temperature Control Panel.............................................................................................. 1-4
Laser Resonator and Galvonometer Head ............................................................................. 1-5
Section III: I/O Signal Interface................................................................................................. 1-7
External Input/Output (EXT I/O) Connector......................................................................... 1-7
Connector Configuration ................................................................................................. 1-7
Input Signals .................................................................................................................... 1-8
Output Signals.................................................................................................................. 1-9
CHAPTER 2: Getting Started...................................................................................................... 2-1
Section I: Planning .................................................................................................................. 2-1
Physical Requirements........................................................................................................... 2-1
Power Requirements .............................................................................................................. 2-1
Cooling Water Requirements................................................................................................. 2-1
Section II: Transportation and Handling .................................................................................. 2-2
Section III: Power Supply Connections..................................................................................... 2-2
Connection of Power Supply Cable....................................................................................... 2-2
Section IV: Cooling System Connections.................................................................................. 2-2
Connection of Water Supply Hoses....................................................................................... 2-3
Connection of Deionized Water Hoses Between Controller and Oscillator.......................... 2-3
Cooler Unit Deionized Water Supply .................................................................................... 2-3
Section V: Signal Connections ................................................................................................. 2-4
Connection of Control Cables Between Controller and Oscillator........................................ 2-4

LM45 Nd:YAG LASER MARKER
x 990-518
CONTENTS (continued)
CHAPTER 3: Operating Instructions ......................................................................................... 3-1
Section I: Operating Precautions............................................................................................. 3-1
Section II: Preparing for Operation .......................................................................................... 3-1
Section III: Operation................................................................................................................. 3-1
CHAPTER 4: User Maintenance ................................................................................................. 4-1
Section I: Maintenance Precautions ........................................................................................ 4-1
Precautions............................................................................................................................. 4-1
Section II: Maintenance Procedures ......................................................................................... 4-1
Cooler Maintenance............................................................................................................... 4-1
Air Filter Cleaning ........................................................................................................... 4-1
Water Draining Occasions ............................................................................................... 4-2
Solenoid Valve Strainer Cleaning.................................................................................... 4-2
Replacing the Ion-Exchange Cartridge, Water Filter, and Deionized Water .................. 4-3
Draining the Deionized Water ......................................................................................... 4-4
Draining the Input Water ................................................................................................. 4-4
Draining the Water to Prevent Freezing .......................................................................... 4-5
CHAPTER 5: Service .................................................................................................................... 5-1
Section I: Service Precautions................................................................................................ 5-1
Precautions............................................................................................................................. 5-1
Section II: Service Procedures.................................................................................................. 5-1
Lamp and Flow Tube Replacement ............................................................................................. 5-1
Cleaning and Replacement of F·2Lens Protective Glass............................................................ 5-5
Fuse Replacement ........................................................................................................................ 5-5
Section III: Troubleshooting ...................................................................................................... 5-6
Troubleshooting ..................................................................................................................... 5-6
Section IV: Parts Lists................................................................................................................ 5-9
Parts Lists............................................................................................................................... 5-9
Section V: Repair Service......................................................................................................... 5-10
Repair Service........................................................................................................................ 5-10

LM45 Nd:YAG LASER MARKER
990-518 xi
CONTENTS (continued)
APPENDIX A: Technical Specifications ....................................................................................... A-1
Laser Specifications............................................................................................................... A-1
Outline Drawings................................................................................................................... A-3
Controller ......................................................................................................................... A-3
Contents of Labels ........................................................................................................... A-3
Resonator ......................................................................................................................... A-4
Contents of Labels ........................................................................................................... A-4
APPENDIX B: System Timing....................................................................................................... B-1
Input and Output Timing Signals........................................................................................... B-1
INDEX............................................................................................................................................... Index-1
ILLUSTRATIONS
Figure Title Page
1-1 Input Signals .......................................................................................................................... 1-8
1-2 Output Signals........................................................................................................................ 1-3
1-3 Control Panel, Controls and Indicators.................................................................................. 1-3
1-4 Temperature Controller Panel, Controls and Indicators ........................................................ 1-4
1-5 Laser Resonator and Galvanometer Components.................................................................. 1-5
1-6 Input/Output Signal Configuration ........................................................................................ 1-7
2-1 Power Supply Cable Connections.......................................................................................... 2-2
2-2 Water Supply Hose Connections ........................................................................................... 2-3
2-3 Filling Deionized Water Tank ............................................................................................... 2-3
4-1 Air Filter Removal ................................................................................................................. 4-1
4-2 Solenoid Valve Disassembly ................................................................................................. 4-2
4-3 Solenoid Valve Bolt............................................................................................................... 4-3
4-4 Drain Pipe Location ............................................................................................................... 4-3
4-5 Cartridge Removal ................................................................................................................. 4-3
4-6 Laser Cavity Plug................................................................................................................... 4-4
4-7 Jumper Hoses Installed .......................................................................................................... 4-4
4-8 Solenoid Valve....................................................................................................................... 4-5

LM45 Nd:YAG LASER MARKER
xii 990-518
ILLUSTRATIONS (continued)
Figure Title Page
5-1 Preparation for Removing Lamp and Flow Tube .................................................................. 5-2
5-2 Oscillator Cover Hole Cover ................................................................................................. 5-2
5-3 Removing and Replacing Lamp and Flow Tube ................................................................... 5-3
5-4 Safety Interlock...................................................................................................................... 5-4
5-5 Removing Protective Glass.................................................................................................... 5-5
5-6 Cleaning Protective Glass...................................................................................................... 5-5
5-7 Fuse Location......................................................................................................................... 5-6
TABLES
Table Title Page
1-1 Input Signals .......................................................................................................................... 1-8
1-2 Output Signals........................................................................................................................ 1-2
4-1 Water Draining Occasions ..................................................................................................... 4-2
5-1 Fuse Complement .................................................................................................................. 5-5
5-2 Troubleshooting Check List................................................................................................... 5-6
5-3 Service Parts........................................................................................................................... 5-9
5-4 Ship Kit (P/N 4-81099-01) .................................................................................................... 5-10

LM45 Nd:YAG LASER MARKER
990-518 1-1
CHAPTER 1
SYSTEM DESCRIPTION
Section I: Features
The LM45 is a Q-switched Nd:YAG laser marker that marks metal, plastics, etc. at a high speed with a laser
beam from a galvanometer scanner, performing high-precision marking of programmed characters and
figures. Its features are as follows:
• Laser power supply, control power supply, and cooler are housed in a compact unit, which reduces the
space requirement for the unit (floor space).
• Refined design contributes to comfortable work environment.
• Mouse, function keys, and Windows operational environment ensure easy operation.
• A variety of I/Os ensures easy linking to automated equipment.

CHAPTER 1: SYSTEM DESCRIPTION
LM45 Nd:YAG LASER MARKER
1-2 990-518
Section II: System Components
Controller
Front Panel
Figure 1-1 illustrates the controls, indicators, and components on the front of the LM45 Nd:YAG Laser
Marker. The following paragraphs describe their functions.
1 Control Panel. The Control Panel controls the
laser power supply, cooler and scanning unit. It
contains a CD ROM driver and a 3½-inch floppy
disk drive mounted behind a pull-down panel. The
keyboard (item 2) is also stored behind the panel,
and when the panel is pulled down, it can act as a
support for the keyboard. The panel displays the
starting condition, operating condition of marking
data, monitored values, etc. Details of the panel
are shown in figure 1-3.
2 Keyboard. Used by the operator to provide
inputs and set various conditions and data.
3 MAIN POWER Circuit Breaker. Applies
power to the Laser Marker and protects the circuits
from current overload.
4 CONTROL Key Switch. Key operated switch
for enabling the Laser Marker.
5 TEMP CONT (Temperature Controller).
Controls the temperature of the deionized water,
used to cool the laser oscillator. Details of the
Temperature Controller are shown in figure 1-4.
6 Remote Interlock connector. Used for
remotely stopping the laser oscillation. The input
signal closes the shutter of the laser oscillator,
stopping the laser oscillation.
7 EXT. I/O Connector. Connects input/output signals for externally controlling the Laser Marker.
8 Water Level Gauge/Drain Pipe. Indicates the water level in the cooler, and is used to drain deionized
water.
9 Deionized Water Tank. Contains water filter and ion-exchange resin cartridge.
10 Solenoid Valve. Controls the external water source to the heat exchanger of the cooler.
1
Figure 1-1. Controller Front Panel,
Controls, Indicators, and Components
M I Y
A
C H I
M L - 4 1 4 1
A
2
3
4
9
10
5
56
7
8

CHAPTER 1: SYSTEM DESCRIPTION
LM45 Nd:YAG LASER MARKER
990-518 1-3
Rear
Figure 1-2 illustrates the components on the rear of the LM45 Nd:YAG Laser Marker. The following
paragraphs describe their functions.
1 Display/ RS-232C Connectors. Connectors for interfacing with the display, mouse, or (through an
RS-232C cable) with an external device.
2 External Water Source Inlet. Input connector for
primary cooling water for the Controller.
3 Water Outlet. Output connector for discharging
primary cooling water.
4 Deionized Water Inlet. Input connector for
deionized water; connects to the oscillator.
5 Deionized Water Outlet. Output connector for
discharge of deionized water; connect to the oscillator.
6 Air Filter. Filters air drawn into the controller.
7 Wiring Duct. Accommodates the cables
connecting the controller to the oscillator.
8 Control Power Supply. Operating from a 230V
AC source, this unit supplies power for the control
system.
NOTE: Do not change the setting of input voltage
select switch. When using this power supply, use only a
display rated for the same voltage.
Control Panel
1 Panel Switches. The following switches
provide the indicated control function:
START When the Laser Marker is
properly set up for marking,
pressing this switch will start
the marking operation.
STOP Pressing this switch will stop
the marking.
RESET Pressing this switch will reset
a detected trouble.(Resets TROUBLE indicator.)
2 Panel Indicators. The following indicators light to indicate the condition of the Laser Marker:
Figure 1-2. Controller (Rear),
Components
1
2
3
4
5
6
7
8
123
Figure 1-3. Control Panel, Controls and
Indicators
P O W E R
H V - O
N
R E A D Y
S H U T T E R
L A S E R O
N
T R O U B L E
E X T .
S T O P
R E S E T
S T A R T
P - 1 3 5 5
E M E R G E
N
C Y S T O P
P - 1 3 5 4
ÂÄÃ ÂÅÅÅÅÅÅÅÄÅÅÅÅÅÅÅ
1 2 3

CHAPTER 1: SYSTEM DESCRIPTION
LM45 Nd:YAG LASER MARKER
1-4 990-518
POWER Indicates that power is supplied to the Laser Marker.
SHUTTER Indicates that the resonator shutter of the oscillator is open.
EXT. Indicates Laser Marker is in external control mode.
HV-ON Indicates that the excitation lamp is lighting up.
LASER ON Indicates that there is output from the laser.
READY Indicates that the Laser Marker is ready to start marking.
TROUBLE Indicates some trouble has occurred.
3 EMERGENCY STOP Switch. Used for emergencies; stops laser oscillations and the cooler.
Temperature Controller Panel
1 Temperature Display. With the pressing of the
Setting Mode Selector Pushbutton Switch (item 4),
this display will sequence through the following
readings:
Currently measured temperature,
Output (set) value,
Upper alarm value,
Lower alarm value, and
Stand-by mode.
2 ON (Control Output Check Lamp). When the red
indicator adjacent to ON is lit, the external water
source is available. When the indicator is off, the
water supply is stopped.
3 ÏÐÏÐÏÐ(Set Value Input Keys).
These three sets of keys allow the operator to raise and lower the following three settings:
Output (set) value,
Upper alarm value, and
Lower alarm value.
NOTE: The above settings are factory-set and for normal use should not be changed.
4 Setting Mode Selector Pushbutton Switch. Each time this switch is pressed, the contents of the
Temperature Display (item 1) sequences through the readings shown in item 1, above.
NOTE: The above settings are factory-set and for normal use should not be changed.
5 Indication Selector Pushbutton Switch. Each time this switch is pressed, the contents of the
Temperature Display (item 1) toggles between the Current measured temperature and the Output
(set) value.
6 SV (Set Value) LED. The indicator (SV) flashes when the temperature display is set at the Output
(set) value. At this time (while SV is flashing), the operator can reset the Output (set) value.
NOTE: The above settings are factory-set at 86°F (30°C) and for normal use should not be changed.
7 AL (Alarm Output Check) LED. Flashes when the Output (set) temperature is outside the range
of the temperatures between those set as the Upper alarm value and the Lower alarm value.
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A L
S V
ON
C
TEMPERATURE CONTROLLER
2
1
5
4
6
7
3
Figure 1-4. Temperature Controller
Panel, Controls And Indicators

CHAPTER 1: SYSTEM DESCRIPTION
LM45 Nd:YAG LASER MARKER
990-518 1-5
Laser Resonator and Galvanometer Head
Figure 1-5 illustrates the components in the laser resonator and galvanometer head.. The following
paragraphs describe their functions.
1 Resonator Mirrors. Amplify the light output from the laser cavity.
2 Q Switch. Converts continuous oscillation (CW) laser beam into pulsed laser beam having higher
peak power with an acoustic optic modulator (AOM). Ultrasonic waves of 24MHz are acousto-
optically modulated to turn on and off the CW laser beam at the interval of several kHz to obtain
higher peak power.
3 Aperture. Reduces the laser oscillation beam diameter to 2.5 mm.
4 Guide Beam. Indicates each marking point with visible red beam (laser diode) and sdjusts the
optical axis of the laser beam.
5 Guide Beam Reflector Mirror. Adjusts the optical axis of the laser beam.
6 WATER OUT Hose. Connects with the deionized water inlet of the controller (rear side).
7 WATER IN Hose. Connects with the deionized water outlet of the controller (rear side).
8 Trigger Box. Houses the high-voltage circuit for turning on the YAG rod excitation lamp.
9 Laser Cavity. Stores the excitation lamp and YAG rod. When this lamp is turned on, the YAG rod
is excited. As the inside of the laser cavity becomes hot, it is cooled with deionized water.
10 Oscillator Base. Supports the optical parts in the laser oscillator.
11 Main Shutter. Opens and closes to control laser oscillation.
Fi
g
ure 1-5. Laser Resonator and Galvanometer Com
p
onents.
1 2 3 4 5 6
78
1
910
11
12
13
14
19
18
17
16
15

CHAPTER 1: SYSTEM DESCRIPTION
LM45 Nd:YAG LASER MARKER
1-6 990-518
12 Safety Interlock Switch. Prevents electrical and laser hazards to the operator or technician.. When
the head cover is removed, the high voltage is turned off and the pump stops. This switch is used for
maintenance of the oscillator head in the maintenance mode.
13 Beam Expander. Expands the laser beam diameter to three times and reduces the laser divergence
angle to one third. By reducing the divergence angle, the laser beam can be converged for marking.
14 Galvano-driver Circuit Board. Controls the galvanoscanner.
15 Wiring Duct. Accommodates the cables from the controller.
16 Protective Glass. Protects the from spatter produced by marking.
17 fC2Lens. Condenses the laser beam in the marking area. This aspherical lens is designed to
produce an equivalency between the turning speed of the mirror and the marking scanning speed so
that the two will be proportional.
18 X-axis Galvanoscanner. The driver that directs the mirror to scan the laser beam along the X-axis.
19 Y-axis Galvanoscanner. The driver that directs the mirror to scan the laser beam along the Y-axis.

CHAPTER 1: SYSTEM DESCRIPTION
LM45 Nd:YAG LASER MARKER
990-518 1-7
Section III: I/O Signal Interface
External Input/Output (EXT. I/O) Connector
Figure 1-6 shows the configuration of the input/output connector. The signals and their purposes are
described in the following paragraphs.
Connector Configuration
The connector is a DSUB37pin (Female)
Figure 1-6. Input/Output Signal Configuration
1
2
3
4
5
6
7
8
9
10
14
15
11
12
13
16
17
18
19
21
20
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
+24V Out
+24V In
Marking Start
Input Common
Conditional Mark Bit 0
Marking Stop
Input Common
Input Common
Trouble Reset
Input Common
Emergency Stop
Input Common
External Control
Input Common
Layer Control Output Bit 7
Shutter Open
Trouble
Output Common
Conditional Mark Bit 1
Conditional Mark Bit 2
Conditional Mark Bit 3
Conditional Mark Bit 5
Conditional Mark Bit 4
Conditional Mark Bit 6
Conditional Mark Bit 7
Layer Control Output Bit 6
Layer Control Output Bit 5
Layer Control Output Bit 4

CHAPTER 1: SYSTEM DESCRIPTION
LM45 Nd:YAG LASER MARKER
1-8 990-518
Input Signals
The input signals are listed in Table 1-1.
Table 1-1. Input Signals
Pin No. Signal Name Signal Description
1 +24V Output Power source for input signals. (To be connected to pin 20
when internal power supply is used.)
20 +24V Input Input power for input signals (Receives +24V.)
2 Marking Start Closing this pin starts the marking when External Control is
enabled.
3 Marking Stop* Opening this pin stops the marking.
4 0
23 1
5 2
24 3
6 4
25 5
7 6
26
Conditional Mark
Inputs
7
See LM45 Software Manual (Part No. 990-519) under Laser
Control Properties, Conditional Mark.
Switch open means “HI” (box is checked).
Switch closed (connecting signals to ground) means “LO,”
corresponding to an unchecked box.
9 Trouble Reset Closing this pin resets the trouble condition signal.
29 External Emergency
Stop
Opening this pin stops the marking operation; removes high
voltage to the oscillator, closes the resonator shutter, and
transmits the External Trouble signal.
30 External Control Connecting this pin to common enables the external marking
start signal (pin 2), and disables the software and front panel
Marking Start functions.
Leaving this pin open disables the external marking start
signal and enables both the software and front panel Marking
Start functions.
8, 13,
14, 28,
31
Not Used Leave unconnected.
10, 11,
12, 21,
22, 27,
32, 33
Input Common 0V, common terminal for all input signals. Isolated from
internal signal common (ground).
*Effective in both External Control Mode and Internal Control Mode.