HP 5501A Service manual

Errata
Title & Document Type: 5501A Laser Transducer System OP/SRV
Manual Part Number: 05501-90021
Serial Prefixes: 1948A
Revision Date: January 1980
HP References in this Manual
This manual may contain references to HP or Hewlett-Packard. Please note that
Hewlett-Packard's former test and measurement, semiconductor products and
chemical analysis businesses are now part of Agilent Technologies.
Changes to this Manual
No changes have been made to this manual. All pages are scanned at 300 DPI
or greater. About this Manual
This manual is reproduced from scans of an original document and images
OCR’d with Adobe Acrobat. OCR errors may exist and as such the user of this
document should take care and use common sense when referencing this
documentation. Copyright Notice
This documentation is © Copyright 1980 Hewlett Packard and © Copyright 2006,
Jack Hudler, [email protected].
Permission to use and redistribute this documentation for non-commercial and
internal corporate purposes is hereby granted, free of charge.
Any redistribution of this documentation or its derivates must include this
copyright notice.
You may not sell this documentation or its derivations without written consent.
You may modify this documentation as necessary, but you may not sell
derivative works based on it.
You may include this documentation with the equipment/hardware on which it is
used for the purposes of selling the equipment/hardware. If you advertise that a
copy of this documentation is included in the sale, you must state that is for
“Free”.
Meaning if you want to gratuitously toss in a copy of the manual on an eBay sale,
it’s ok with me as long as you state it’s for free. No you can’t sell a digital archive
of manuals and say it includes a free copy of this documentation. You must give
it away with equipment.
I think you get the spirit of the copyright; it takes a lot of hours to scan and
replicate a manual. I just want this used in the spirit in which is it given.
Agilent if you have questions or wish to include this in your archive, please email
me.

Laser Trans~licer Syste~~i
i

This product has beendesignedandtestedaccordingtolnternationalSafetyRequirements. To ensuresafe
operation andto keep the product safe, the information, cautions, and warnings inthis manualmust be
heeded. Refer to Section
7 for general safety considerations applicable to this product.
Hewlett-Packard Company certifies that this product met its publishedspecifications at the time ofship-
ment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable
to the UnitedStates NationalBureauofStandards, totheextent allowedbytheBureau's calibrationfacility,
andto the calibration facilities of other lnternational Standards Organization members.
WARRANTY
This Hewlett-Packard product is warranted against defects in materials and workmanship for a period of
90 days from date of shipment, except that in the case of certain components listed in Section 1 of this
manual, this warranty shall be for the specified period. Duringthe warranty period, HP will, at itsoption,
either repair or replace products which prove to be defective.
Warranty serviceof this product will beperformedat Buyer's facility at nocharge within HP servicetravel
areas. Outside HP service travel areas, warranty service will be performed at Buyer's facility only upon
HP's prior agreement and Buyer shall pay HPJsround trip travel expenses. Inall other cases, products
must be returned to a service facility designated by HP.
For products returned to HPfor warranty service, Buyer shall prepay shippingcharges to HP and HP shall
pay shipping charges to returnthe producttoBuyer. However, Buyershall payallshippingcharges, duties,
and taxes for products returnedto HP from another country.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance
by Buyer, Buyer-suppliedsoftware or interfacing, unauthorized modification or misuse, operationoutside
of the environmental specifications for the product, or improper site preparation or maintenance.
NO OTHER WARRANTY
IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES. HP SHALL NOT
BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
WHETHER BASED ONCONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product maintenance agreements and other customer assistance agreements are available for Hewlett-
Packardproducts.
For any assistance, contact your nearest Hewlett-PackardSales andServiceOffice. Addresses areprovided
at the back ofthis manual.

L HEWLETT
PACKARD
Manual Part No. 05501-90021
MicroficheNo. 05501-90022 Printedin
U.SJ
OPERATING AND SERVICE MANUAL
LASER TRANSDUCER SYSTEM
SERIAL PREFIXES
This manual applies to 5501A Laser Transducer Systems with
serial prefix 1948A. For serial prefixes above 1948A, a change
sheet
is included with the manual. For serial prefixes below
1948A, refer to Appendix E, Backdating.
Copyright HEWLETT-PACKARDCOMPANY 1976
5301 STEVENS CREEK BLVD., SANTA CLARA, CALIF. 95050
Printed: JAN1980

TABLE OF CONTENTS
Section Title Page
GENERAL INFORMATION .......................................... 1-1
1.1 What the System Manual Covers ............................. 1-1
1.2 Section I. General Information .............................. 1-3
......................
1.3 Section II. Laser Transducer and Optics 1-3
1.4 Section
Ill. System Electronics ............................... 1-4
1.5 Section IV. Programming
.................................... 1-4
1.6 Section V. Installation and Checkout
......................... 1-5
1.7 Section VI. Troubleshooting
................................. 1-5
1.8 Howto Use All of the Manuals
.............................. 1-6
1.9 5501A Laser Transducer System Specifications
................. 1-8
1 . 10 5501A Laser Transducer System Theory of Operation .......... 1-8
1.11 Typical Applications and Measurements ...................... 1-9
1 . 12 Configuring a 5501A Laser Transducer System
.................
1-10
................................................
LASER ANDOPTICS 2-1
............................................... 2.1 Introduction 2-1
............................... 2.2 Overview of Laser and Optics 2-2
........................
2.3 Fundamental Measurement Concepts 2-2
............................. 2.4 Multiaxis Measurement Systems 2-5
.................................. 2.5 Measurement Components 2-5
2.6 Degrees of Freedom
...................................... 2-6
...............
2.7 General Considerations for MountingOptics 2-6
...................................
2.8 5501A Laser Transducer 2-6
...................
2.9 Splitting and Bending Optics (Figure 2-9) 2-10
2.10 Measurement Optics
..................................... 2-11
............................... 2.19 Typical Mountingof Optics 2-21
2.20 10780A Receiver
........................................... 2-24
.................................... 2.21 Accuracy Considerations 2-24
............................
2.22 Velocity of Light Compensation 2-25
............................. 2.23 Deadpath Error Compensation 2-25
.......................
2.24 Material Temperature Compensation 2-27
2.28 Cosine Error
........................................ 2-29
.......................................... 2.29 System l nstallation 2-31
2.30 MultipleMeasurement Axes
................................ 2-31
2.31 Beam Path Loss Computation
.............................. 2-34
2.32 Installation Examples
...................................... 2-36
.......................
2.33 Mechanical l nstallation Considerations 2-39
........................................... 2.34 General .. 2-39
.......... 2.35 Abbe Error ................................. 2-40
.......................................... 2.36 Deadpath Errors 2-43
2.37 Air Turbulence
........................................... 2-44
.........................
2.38 Laser Beam and Optics Protection 2-44
2.39 Alignment Procedures
...................................... 2-47
2.40 General
.................................................. 2-47
...................................... 2.41 Alignment Techniques 2-49
2.42 Alignment Principles
...................................... 2-49
2.43 Alignment Tips
........................................... 2-50
2.44 Visual Alignment Procedure
............................... 2-51
.......................
2.45 Autoreflection Alignment procedure 2-53
..........
2.46 Plane Mirror Interferometer Alignment Procedure 2-56

TABLE OF CONTENTS (Continued)
Section Title
Page
SYSTEM ELECTRONICS ..................................... ..... 3-1
...............................................
3.1 Introduction 3-1
..............................
3.2 Simplified Theory of Operation 3-2
.....................................
3.3 Functional Descriptions 3-3
3.4 HP-IB Interface Electronics
................................ 3-3
3.5 Computer Interface Electronics
............................ 3-4
3.8 English/Metric Pulse Output Electronics
.................... 3-10
...................................
3.9 10781A Pulse Converter 3-12
...............................
3.10 Detailed Theory of Operation 3-13
...................................
3.11 5501A Laser Transducer 3-13
..........................................
3.12 10780A Receiver 3-15
3.13 10740A Coupler
.......................................... 3-16
3.14 10745A HP-IB Interface
................................... 3-18
3.15 10746ABinarylnterface
................................... 3-20
..........................................
3.16 10760A Counter 3-21
3.17 1076214 Comparator
....................................... 3-22
3.18 10764A Fast Pulse Converter
................................ 3-24
.........................................
3.19 10761A Multiplier 3-25
3.20 10781A Pulse Converter
................................... 3-26
3.21 10763A English/Metric Pulse Output
....................... 3-27
...........................
3.22 10755A Compensation l nterface 3-29
3.23 10756A Manual Compensator
.............................. 3-31
3.24 5510A Opt010 Automatic Compensator and
....................
10563A MaterialTemperature Sensor 3-31
..................................
3.25 10783A Numeric Display 3-31
..............................
3.26 5501A Power Supply Options 3-32
.................................
PROGRAMMINGAND OPERATION 4-1
...............................................
4.1 Introduction 4-1
.......................
4.2 Programming Objectives and Methods 4-2
.......................
4.3 General System Operating Description 4-3
4.4 Sample Outline for a Three-Axis Counter-Based System ..... 4-3
.....................
4.5 General Coupler Interface Description 4-4
.......................
4.8 Calculator-Based System Programming 4-6
.......................
4.9 Computer-Based System Programming 4-7
...........................................
4.10 Typical Programs 4-13
.........................................
4.11 Data HandlingTips 4-44
4.12 Subtraction of Preset Numbers
............................ 4-44
.......................
4.13 Conversion to Inches or Millimetres 4-44
....................
4.14 Conversion when Deadpath is Included 4-44
4.15 Handshaking Routine Between a Controller and the
.................................
10746A Binary Interface 4-46
Conversion of Destination and Displacement Information
.....................
When Usingthe 107624 Comparator 4-47
107624 Comparator/10764A Fast Pulse Converter
...................................
Input/Output Format 4-48
.........................
Programmingand DebuggingTips 4-48
.................................................
Operation 4-49
..................................
Initial Power Application 4-55
iii

TABLE OF CONTENTS (Continued)
Section Title Page
INSTALLATIONAND CHECKOUT ................................... 5-1
5.1 Introduction
............................................... 5-1
5.2 System Ground Considerations
.............................. 5-2
................. 5.3 RequiredCables and Preliminary Procedures 5-4
5.4 lnstallationand Alignment of Laser Head. Receiver.
and Optics
............................................... 5-8
............... Installationof Electronic InterfaceComponents 5-9
........................ HP-IB InterfaceElectronics Installation 5-9
................. Computer Interface ElectronicsInstallation 5-12
......................... Counter-Based System l nstallation 5-12
...................... Comparator-Based System Installation 5-13
........... English/Metric Pulse Output Electronics Installation 5-19
.............. 10781A Pulse Converter ElectronicsInstallation 5-28
.............................. Interface Electronics Checkout 5-30
HP-IB and/or Binary Controlled Counter-Based
System Checkout
.......................................... 5-30
................................ Comparator-Based Systems 5-31
.............
English/Metric Pulse Output Systems Checkout 5-31
...............
10781A Pulse Converter ElectronicsCheckout 5-33
PreventiveMaintenance
.................................... 5-34
.......................... Cleaningof Optical Components 5-34
TROUBLESHOOTING
............................................... 6.1 Introduction 6-1
6.2 Troubleshooting Assumptions
............................. 6-2
........................
6.3 General Troubleshooting l nformation 6-2
6.4 Laser Head Troubleshooting
............................... 6-3
6.5 Receiver Troubleshooting
................................. 6-3
..........................
6.6 Optical DevicesTroubleshooting 6-3
6.7 System Controller Troubleshooting
........................ 6-3
........
6.8 Coupler and Interface ElectronicsTroubleshooting 6-4
.................
6.17 10781A Pulse Converter Troubleshooting 6-6
.
6.18 Power Supply Troubleshooting ......................... .. 6-6
....... ...............
6.19 DetailedTroubleshooting Procedures .. 6-6
Appendix Title Page
..............................
HP 9820A AND 9830A PROGRAMMING A-I
A.1 Introduction ................................................ A-1
A.2 Programmingwith the HP 9820A ............................ A-I
A.3 Programmingwith the HP 9830A
............................ A-I
....................................
USER APPLICATION PROGRAMS B-I

TABLE OF CONTENTS (Continued)
Page
Appendix Title
C
Table
..............................................
SYSTEM CABLING C-1
................................
C.l System Cable Requirements C-1
........................................
EXPANSIONCOEFFICIENTS D-1
.....................................................
BACKDATING E-1
................................................
E.1 Introduction E-1
....................................
E.2 Previous Option Numbers E-2
.....................
E.3 Calculator Interface Electronics Checkout E-4
............................................
E.4 Cable Fabrication E-I2
.........................
E.5 Hooded Connector Wiring Procedure E-30
LIST OF TABLES
Title Page
........................
5501A Laser Transducer System Specifications 1-8
....................................
Basic Measurement Components 1-11
HP-IB Interface Electronics .......................................... 1-12
.....................................
Computer Interface Electronics 1-13
.............................
English/Metric PulseOutput Electronics 1-14
..................................
10781A Pulse Converter Electronics 1-14
...........................
Power Supplies and Current Requirements 1-15
Compensators
..................................................... 1-16
Calculation of Exact Compensation Factor
............................ 2-29
Calculation of Total Compensation
.................................. 2-30
Angle
8 Versus Cosine Error
........................................ 2-31
...........
Typical Calculator Interface Electronics System Specification 3-4
Typical Counter-Based Computer InterfaceSystem Specifications
...... 3-6
Typical Comparator-Based Computer Interface System Specifications
... 3-8
Typical Specifications for English/Metric Pulse Output System
......... 3-12
Power Supplies Available for 5501A Laser Transducer System
........ 3-32
..........................................
10740A Coupler Bus Lines 4-5
10745A HP-IB Interface lnstruqtions .................................. 4-8
.............................
70746A Binary I/O Interface Instructions 4-9
.....................................
10755A Compensation Interface 4-9
10760A Counter Instructions ........................................ 4-10
10761A Multiplier Instructions ....................................... 4-10
10762A Comparator Instructions ..................................... 4-11
10764A Fast Pulse Converter Instructions ............................. 4-11
10763A Responses to Instructions .................................... 4-12
Possible Instructions by 10763A English/Metric Pulse Output
.......... 4-12
Instruction Set Conversion from Alphanumeric to Decimal
............ 4-13
10745A HP-IB InterfaceTypical Program Using HP 9825A Calculator .... 4-13
10746A Binary InterfaceTypical Program
............................. 4-27
...........................
Binary InterfaceTypical Program Variables 4-29
10762A Comparator/10764A Fast Pulse Converter
In~ut/Out~utFormat ........................................ 4-50

LlST OFTABLES (Continued)
Table
A-I
A-2
E-I
E-2
Title
RecommendedTest Equipment ..................................... 5-2
RequiredCables
................................................... 5-5
.......... Typical Configuration Guide for System Jumpersor Switches 5-20
10763A Control Connector Functions ................................ 5-24
...................
HP-IB Interface ElectronicsSystem Troubleshooting 6-8
Binary Controlled Counter lnterfaceElectronics Systems
Troubleshooting
................................................. 6-14
........ Binary Controlled Comparator-Based Systems Troubleshooting 6-20
English/Metric Pulse Output Electronics System Troubleshooting 6-27
10781A Pulse Converter Troubleshooting ............................. 6-39
Counter-Based System Using HP 9830A (BASIC Language)
.............. A-2
Comparator-Based System Using HP 9830A (BASIC Language)
.......... A-4
Linear Thermal Expansion Coefficients of Metals and Alloys
. .
Descriptionof Optics (for systems purchased prior to Dec . 31. 1979) .... E-2
5501A Special Option Number to Model Number or Part Number
Conversion
....................................................... E-4
10746A Binary lnterfaceA2566B Microcircuit Card Pin Connection ..... E-21
Figure Title
Page
LlST OF FIGURES
.
Page
HP 5501A Laser Transducer System ................................... 1-2
ManualsSuppliedwith Laser Transducer System
...................... 1-7
Typical Laser Transducer System Block Diagram
....................... 1-9
Basic Measurement System
.......................................... 2-3
Basic InterferometerMeasurements
.................................. 2-3
Allowable ComponentMotions
...................................... 2-4
...................................... MultiaxisMeasurement System 2-5
The
Six Degrees of Freedom ......................................... 2-6
5501A Laser Transducer Mounting ................................... 2-7
Beam Polarization
.................................................. 2-8
.................................. 5501A Laser Transducer Dimensions 2-9
.. Splittingand BendingOptics ..................................... i 2-10
...............
10702A Linear l nterferometerand 10703A Retroreflector 2-11
............... 10702A Linear Interferometerwith Option 001 Windows 2-12
Linear Interferometer Laser Beam Path
............................... 2-13
......... 10705A Single Beam Interferometer and 10704A Retroreflector 2-13
......................... Single Beam Interferometer Laser Beam Path 2-14
10706A Plane Mirror Interferometer .................................. 2-14
.........................
Plane Mirror Interferometer Laser Beam Path 2-15
.............................. 10710A and 10711A Adjustable Mounts 2-16
Splittingand BendingOptics (10700A, 10701A and 10707A)
....................................................
Specifications 2-17
..........................
10702A Linear InterferometerSpecifications 2-18
.................................
10703A RetroreflectorSpecifications 2-18
.................... 10705A Single Beam l nterferometerSpecifications 2-19

LIST OFFIGURES (Continued)
Figure Title Page
..................................
10704A Retroreflector Specifications 2-18
....................
10706A Plane Mirror Interferometer Specifications 2-19
..................
10710A and 10711A Adjustable Mounts Specifications 2-20
Horizontal and Vertical Plane MountingUsing the
.........................................
10710A Adjustable Mount 2-21
2-26 Horizontal Plane Mounting Using the 10711A Adjustable Mount
....... 2-23
..........
2-27 Vertical Plane MountingUsingthe 10711A Adjustable Mount 2-23
........................................
2-28 10780A Receiver Dimensions 2-24
.......................................
2-29 DeadpathError Compensation 2-26
2-30 Relative Effect of Errors inAtmospheric and Material
..............................................
Temperature Factors 2-27
.......................................................
2-31 Cosine Error 2-30
...........................................
2-32 Three-Axis Configuration 2-31
.............................................
2-33 Four-Axis Configuration 2-32
................
2-34 Two-Axis Plane Mirror Interferometer Configuration 2-33
............................
2-35 X-Y Stage Installed in a Vacuum Chamber 2-33
2-36 Two-Axis Measurement System with Unequal Measurement Paths
...... 2-34
.................................
2-37 Three-Axis Machine Tool Installation 2-36
...........................
2-38 Three-Axis Measuring Machine Installation 2-37
..............................................
2-39 Laser Head Installation 2-38
..................................................
2-40 Y-Axis Installation 2-38
..................................................
2-41 X-Axis Installation 2-39
..................................................
2-42 Abbe Offset Error 2-40
.............
2-43 Positioningof MeasurementAxis to MinimizeAbbe Error 2-41
2-44
X-Y Stage Measurement with 10706A Plane Mirror l nterferometer ...... 2-42
..........................................
2-45 X-Y Stage Geometric Errors 2-42
.........................
2-46 Installation of Optics for Minimum Deadpath 2-43
.........................
2-47 ProtectiveCovers for Optics and Laser Beam 2-45
...................
2-48 Collapsible Spiral Cover for Movable Retroreflector 2-46
................................................
2-49 Optimum Alignment 2-47
.......................................
2-50 Effect of Optics Measurement 2-48
.............
2-51 Effects of Angular Misalignment to the Direction of Travel 2-48
.....................................................
2-52 Alignment Tips 2-50
...................................................
2-53 Visual Alignment 2-52
...........................................
2-54 Autoreflection Alignment 2-54
..............................
2-55 Plane Mirror Interferometer Alignment 2-57
\
...........................................
Simplified Block Diagram 3-2
........................
Calculator Interface Electronics Block Diagram 3-3
Counter-BasedComputer Interface Electronics Block Diagram
......... 3-5
Comparator-Based(Closed-Loop)System Simplified Block Diagram
..... 3-7
Comparator-BasedComputer Interface Electronics Block Diagram
...... 3-8
................
English/Metric Pulse Output Electronics Block Diagram 3-11
....................
10781A Pulse Converter Electronics Block Diagram 3-13
...............................
5501A Laser Transducer Block Diagram 3-14
......................................
10780A Receiver Block Diagram 3-15
...................................
10740A Coupler BackplaneSignals 3-16
...............................
10745A HP-IB l nterface Block Diagram 3-18
...............................
10746A Binary Interface Block Diagram 3-20
......................................
10760A Counter Block Diagram 3-21
..................................
1076214 Comparator Block Diagram 3-23
...........................
10764A Fast Pulse Converter Block Diagram 3-24
vii

LIST OFFIGURES (Continued)
Figure Title Page
10761A Multiplier Block Diagram .................................... 3-25
10781A Pulse Converter Block Diagram .............................. 3-26
10763A English/Metric Pulse Output Block Diagram ................... 3-27
10755A Compensation Interface Block Diagram ....................... 3-29
10756A Manual Compensator ....................................... 3-30
QICounter-Based System Data Flow ................................. 4-15
Comparator-Based System Data Flow
................................ 4-30
Conversion when Deadpath
is Included ............................. 4-45
Receiving Datafrom the 10746A*
.................................... 4-46
Sending Dataor Instructions tothe 10746A
........................... 4-47
................................................... 10780A Receiver 4-49
5501A Laser Transducer Rear Panel Controls and Indicators ............ 4-52
5510A Opt 010 Automatic Compensator Front Panel Controls
and Indicators
.................................................... 4-53
10783A Numeric Display Front Panel Indicators ....................... 4-55
AC Power Grounding
............................................. 5-2
Grounding toAvoid Ground Loops
.................................. 5-3
Typical Laser Transducer System Measurement Signal
..... and Power Routing ........................................ 5-4
10740A Coupler Back Panel Wiring and Strapping on Power Supplies ... 5-6
Installation of Hooded Connectors and Circuit Cards
................. 5-10
Typical Calculator Interface Electronics Interconnecting Diagram
...... 5-11
...................... Counter-Based System Interconnecting Diagram 5-14
Comparator-Based System Interconnecting Diagram
.................. 5-16
Typical English/Metric Pulse Output Electronics lnterconnecting
Diagram
......................................................... 5-19
Control Connector Signal Timing Diagram
........................... 5-24
10781A Pulse Converter Electronics Interconnecting Diagram .......... 5-29
English/Metric Pulse Output System State Diagram ................... 5-32
.......................................... 05501-60009 Power Cable
05501-60008 Reference Cable
......................................
.........................
10780-60003 Power and Measurement Cable
.................................. 10708-60001 Primary Power Cable
10712-60001 Signal and Power Cable
................................
.............................. 10727-60001 Calculator lnterface Cable
..... 10740-60004 Power Cable .................................... i
10740-60005 Power Cable ..........................................
59310-60002 Interface Cable ........................................
10760-60002 Reference Cable ......................................
............................. 10763-60002 Controller lnterface Cable
.......................... 10764-60005 Reference and Doppler Cable
.......................... 10781-60003 Reference and Doppler Cable
10781-60004 Power Cable
..........................................
10783-60003 Power Cable ..........................................
59995-61082 V.O. L . Cable ..........................................
10631A.B. C HP-IB Cables ..........................................
.......................................... 10714-60003 Power Cable
viii

LIST OF FIGURES (Continued)
Figure Title Page
.......................
Typical Reference/Measurement Cable Wiring E-12
........................
5501A Laser Transducer Interconnecting Plugs E-13
........................... 5501A Laser Transducer Rear Panel Wiring E-14
.............................. 10780A Receiver-to-System Plug Wiring E-15
10780A Receiver Rear Panel Wiring .................................. E-17
k15-Volt Power Cable Wiring Diagram ............................... E-17
...................
+5-Volt and k15-Volt Power Cable Wiring Diagram E-18
..................... 10746A Binary Interface HoodConnector Wiring E-19
10760A Counter HoodConnector Wiring ............................ E-20
................ 10762A Comparator l nterface Hood Connector Wiring E-22
.................
10764A Fast Pulse Converter Hood Connector Wiring E-23
.................
10764B Fast Pulse Converter Hood Connector Wiring E-24
10783A Numeric Display Power Cable Wiring ......................... E-26
.....
......................... Power Supply Line Cord .... . E-26
...................................
Control and Output Cable Wiring E-27
10781A Pulse Converter Wiring ...................................... E-29
............
Hood Connector Cable Fabrication Diagram and Parts List E-31
Connector Wiring for Fast Pulse Converter
........................... E-32

SAFETY PRECAUTIONS
This is a Safety Class I system. This system has been designedand tested accordingto IEC
Publication
348, "Safety Requirementsfor Electronic Measuring Apparatus".
LASER RADIATION
I, DO NOT STARE INTO BEAM
\=
-
-
e
d I
& MAXIMUM OUTPUT: 1 mr
1 li
PULSE SPEC: continuous wave
LASER MEDIUM: helium neon
CLASS 11 LASER PROOUCT
BEAM CAN BE SHUT
OFF BY CLOSING
BLACK APERTURE
ALIGNMENT
APERTURE FOR
REDUCED BEAM
-"CAUTIONw - Laser radlatlon
when open and Interlock failed
or defeated. DO NOT STARE
INTO BEAM.

SERVICE
Although this system has been designed in accordance with international safety standards,
this manual contains information, cautions, and warnings which must be followed to ensure
safe operation and to retainthe system insafe condition.
Removalof thecover andsubsequent
seniceor adjustments should be performedonly by qualified service personnel.
t J
WARNING
HIGH VOLTAGES ARE GENERATED WITHIN THE LASER HOUSING.
THE COVER OF THE MODEL 5500C
LASER IS PROVIDED WlTH AN
VlDED WlTH AN INTERLOCK TO PREVENT ACCIDENTAL ACCESS
TO VOLTAGES. FOR
SAF€lY, THERE ARE NO HIGH VOLTAGES
ON THE INTERCONNECTING CABLE.
a
CAUTION
Any adjustment, maintenance, and repair of an opened instrument
under voltage should be avoided
as much as possibleand, when in-
evitable, shouldbe carriedout only by
a skilledpersonwho is aware
of the hazard involved.
Capacitors inside the instruments may still be charged even
if the
instruments have been disconnected from their source of supply.
Whenever it
is likely that the protection has been impaired, the
system must
be made inoperative and be secured against any un-
intendedoperation.
Use of controlsor adjustments, or performanceof proceduresother
than those specified hereinmay result inhazardousradiationexposure.

-- ASER
sect ion
I nformation
1.1 WHAT THE SYSTEM MANUAL COVERS
This manual provides the information necessary for you to understand, install, program,
operate, and troubleshoot the 5501A Laser Transducer System
(Figure 7-7). It does this by
giving you the necessary information at the system level to accomplish each of those func-
tions. Italso acts as a guide to the backup operating and service manuals that are suppliedfor
each unit that make upyour individual system.
The manual
is organized to allow each reader to determine exactly what information is re-
quired and proceed directly to that point. For example, if the system
is already installedand
operating and you wish to modify the existingcontrol program, Section
IV, PROGRAMMING,
contains the required information. However, if you havejust received a system and have not
yet determined exactly how to solve your measurement problem, a brief explanation of the
contents of each section will make it easier for you to use your system and the manual in the
most effective manner.

5. OUTPUT
2. MEASUREMENT OPTICS
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Figure 7-7. HP 5507A Laser TransducerSystem

1.2 Section I, General Information
In addition to explaining what the System Manual covers, Section I also covers the following
subjects:
a.
How to use the other manuals supplied with your system.
b. An overall system level discussion of what
a laser system is and how it makes
measurements.
c. Types and examples of typical measurementsmade with the Laser Transducer System.
d. An explanation of the available system configurations and what
is contained in each
system. By first determining what type of system you are going to use it will be easier
to selectively read those sections of the manual that apply directly to your problems.
Insummary, Section
I contains the information you will need to familiarize yourself with the
Laser Transducer System, and the support documentationand equipment.
1.3 Section II, Laser Transducer and Optics
This section provides the background information on the physical layout of the Laser Trans-
ducer head and receiver, and the optics necessary to direct the laser beam betweenthem. It
is
very important that you know and understand the material contained in this section prior to
mounting these units. The material is covered as follows:
An overall discussion of what constitutes
a basic measurement system. This includes
only the optical portion of the Laser Transducer System. For informationon the system
electronics refer to Section
I1 I.
Measurement components. Detaileddescriptionsof the individual measurementcom-
ponents of the Laser Transducer System including dimensions, mounting, and instal-
lation information. Also discussed are the allowable measurement configurations for
the optical components including interferometers, beam benders, and beam splitters.
Accuracy considerations. Deals with factors affecting the ultimate measuring accu-
racy of the Laser Transducer System. Centers on the effect of the environment under
which the measurement
is made along with techniques for compensating for these
effects. Specific types of measurement errors including the effect of thermal expan-
sion of the part being measured or cut are discussed. Consideration
is also given to
cosine error or errors due to misalignment.
System installation. Discussion of how to install the measurement components in
actual measurement applications. Consideration of possiblecombinations to split and
direct the laser beam to the measurement location. Also discussed
is howto routethe
laser beam to the measurement location with emphasis on minimizing possible mea-
surement errors. This will include the effect of Abbe errors and thermal instabilities
on the measurement process. Techniques of protecting the beam from disruptions
such as thermal effects, cutting fluid, and chips which could interrupt the measure-
mentarealso discussed.
Alignment procedure. General rules for the actual alignment of the Laser Transducer
System after it
is installed on a machine are discussed. Different techniques of align-
ing the components, depending upon the installation and accuracy requirements are
also covered. Specific examples include
a 3-axis measurement application utilizing
the linear interferometer and an
X-Y stage application using plane mirror interfero-
meters. Each example illustrates fundamental techniques which can be applied to
most installations.

Remember that deciding how to physically mount the individual units on your equipment is
only done once (provided it is done correctly). Therefore, be sure that you have examined
all the factors that will affect your measurements. It
is well worthwhile to spend extra time
before mounting the equipment to minimize equipment downtime later.
1.4 Section Ill, System Electronics
The system electronicsare covered as follows:
a.
A brief description of the overall function of the system electronics.
b. HP-IB Interface Electronics.
c. Computer
l nterface Electronics
d. English/Metric Pulse Output Electronics.
e.
10781A Pulse Converter Electronics.
f. Theory of operation for each individual unit.
Inthis section you need only read the areas that directly pertain to your system.
1.5 Section IV, Programming
The programming section is also divided according to system configuration. However, some
of the most useful information you will find in this section are the block diagrams that show
the movement of data between units of the system. This movement
is similar for all type sys-
tems and therefore each example can be studied to increase your overall system knowledge.
The information
is presentedas follows:
a.
A general discussion of the aims and methods of programming the Laser Transducer
System.
b.
A table of individual commands for each unit of the system that is programmable.
c. Commented programs and examples of measurements and data movement using the
9825A Calculator as the system controller and the 10745A HP-IB Interface.
d. Commented programs and examples of measurements and data movement using the
10746A Binary Interface. The 9825A Calculator is used as the system controller but
the program illustrates how a computer could be used instead of the
9825A.
e. A general discussion with examples of data handling after the data has been trans-
ferred to the system controller.
f.
A general discussion of how to debug (remove errors from) your program. Specific
examples of common errors are given.
NOTE
The operating procedures (other than initial turn on) for the
Laser Transducer System are dependent on the programming
or design of the system controller.
g. General operating instructions for a typical system and a brief explanation of the con-
trols onapplicable units.

1.6 Section V, Installation and Checkout
This section provides instructions for installing and checking your system to ensure correct
operation. The procedures are step-by-step instructions for assembling a system and are
divided
as follows:
a. Preliminary checkout of individual units. For example, instructionsare given on how to
check the laser transducer head and receiver prior to mounting them on your
equipment.
b. Physical installation of the laser transducer head, receiver, and optics. This procedure
references Section
II, LASER TRANSDUCER AND OPTICS, and the layout measure-
ment paths you have prepared.
c. Recommendedmounting and interconnectionof electronics. Section
V contains detailed
information to install and interconnect the system. Details of the cable connectorsare
given in Appendix C. If the cables need to be fabricated, refer to Appendix
E.
d. A system checkout procedure, including some simple programs, to verify that your
system
is operating correctly.
e. Any critical adjustments necessary to bring your system on-line (e.g., power supply
adjustments).
1.7 Section VI, Troubleshooting
This section tells you what to do when your system fails in order to return it to proper oper-
ation in the shortest possible time. The troubleshooting information
is presented in the fol-
lowing manner:
a.
A general discussion of how to troubleshoot and repair the Laser Transducer System.
b. Troubleshooting tips for rapid fault isolation. This will tell you how to quickly locate
a problem after your system has been operating.
A detailed troubleshooting procedurethat
is keyedto the system checkout procedure.
By structuring the troubleshooting procedure in this manner it
is possible to make
validassumptionsof equipmentcondition at different pointsinthecheckoutprocedure.
For example, if the system controller has been checked and
is functioning properly,
it can be eliminated as a source of trouble at that time. This approach allows the use
of the troubleshooting procedure during initial installation and checkout, and also if
a problem can not be located after the system has beenoperational. The latter is done
by disassembling your system and reperforming the installation and checkout proce-
dure. One caution about the use of any troubleshooting procedure
is that somewhere,
sometime
a trouble will occur that defies analysis by written procedures.At that time,
the only-solution
is a knowledgeable, patient person tracking down the symptoms
until each has been corrected.

1.8 HOWTO USE ALL OF THE MANUALS
The number and type of manuals supplied with your system is dependent upon the specific
system. Figure
7-2 is a family tree of the manuals supplied with each type of Laser Trans-
ducer System. To use this documentation effectively you must familiarize yourself with the
contentsof the individual manuals.
Every Laser Transducer System
is supplied with this system level manual, a 5501A Laser
Transducer Head unit manual, and a 10780A Receiver unit manual. As the family tree indi-
cates, the 10700 series optics are covered in this manual. The remaining documentation
is
split into the following groups:
1. HP-IB lnterface System manuals.
2. Computer lnterfaceSystem manuals.
3. English/Metric Pulse Output System manuals.
4. 10781A Pulse Converter Syste~manuals.
The important point to note about this division
is that the information contained in these
manuals provides both prerequisite, concurrent, and back-up information to the system
manual. Unless
all of the manuals are used effectively, you may encounter difficulty in instal-
ling, operating, and maintainingyour system properly.
As an example, examinethe additional manualssuppliedwith the HP-IB lnterfaceSystem. First,
youwill receiveall of the9825A Calculator and Hewlett-PackardlnterfaceBus (HP-IB)manuals.
Since the calculator and HP-IB control the system, the informationcontainedinthese manuals
is a prerequisiteto learning how to program your system correctly.
In this manual, Section IV, PROGRAMMING, provides the additional information necessary
to program the Laser Transducer System. However, the programming information in this
manual presupposes that you are familiar with the programming information contained in
the calculator and HP-IB manuals. The same information
is required for any other unit that
acts as a system controller (e.g., an HP computer, some other computer, or a dedicated con-
troller)
.
Next, you will receiveall of the individual unit manuals for the equipment that make upyour
\
system. The information contained in these manuals provides the back-up information you
will need if you desire to change your system configuration, increase your knowledgeof the
individual units, or troubleshoot these units beyond the levelcovered inthis system manual.
During initial installationthere are references to the unit manuals for addressing individual
boards and installing them in the coupler. During operation, reference to the compensator
manuals (either manual or automatic)
is necessary to insure that you are properly compen-
sating the system for atmosphericconditions.
In summary then, it
is very important that you know where to find the specific information
you need to efficiently use the Laser Transducer System. The only way to accomplish this
objective
is to understand the relationship between all of the manuals that are supplied with
your system.
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