EOS MM-12920-1 User manual

EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
Tel: [phone] • Fax: [phone] • Web: www.eostech.com
Lick Automated Planet Finder
2.4 Meter Alt-Azimuth Telescope
Maintenance and Installation Manual
MM-12920-1
This document and enclosed information is the property of EOS Technologies, Inc. The information
contained herein is confidential and cannot be used for commercial or any other purposes. This document
may not be copied nor disclosed without prior written approval of EOS Technologies, Inc.
Controlled Document
Confirm revision before using

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page ii of 43
DOCUMENT CONTROL
© 2009 EOS Technologies, Inc., Tucson, AZ, USA
This document and enclosed information remains the property of EOS Technologies, Inc.
Information herein may not be copied nor disclosed without written consent of EOS
Management.
Issue: 1
Prepared: D. Shelby Stubbe Date: 11/30/2009
Checked: Andrew Carr Date: 11/30/2009
Approved: D. Shelby Stubbe Date: 11/30/2009
Configured: Rose Tharp Date: 11/30/2009
Document Revisions
Issue Date Description Prep Chk Appr
1 11/30/2009 Initial Release DSS AC DSS
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2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page iii of 43
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION........................................................................ 8
1.1 INTRODUCTION............................................................................................................8
1.2 SCOPE...........................................................................................................................8
1.3 CONFIGURATION.........................................................................................................8
1.4 REFERENCES...............................................................................................................9
1.5 DEFINITIONS AND ACRONYMS..................................................................................9
1.6 CONVENTIONS.............................................................................................................9
1.7 SAFETY.........................................................................................................................9
1.7.1 DESIGNED FOR SAFETY.....................................................................................10
1.7.2 PRECAUTIONS DURING MAINTENANCE...........................................................10
1.7.3 SAFETY FEATURES.............................................................................................11
1.7.3.1 Handles............................................................................................................11
1.7.3.2 Lifting Points...................................................................................................11
1.7.3.3 Axis Locks.......................................................................................................11
1.7.3.4 Self-Sealing Fittings.......................................................................................12
1.7.3.5 Over-current Protection Devices ..................................................................12
1.7.3.6 Connector Uniqueness and Pin Arrangement.............................................12
1.7.3.7 Interface to Observatory Interlock System..................................................12
1.7.3.8 Failsafe Design...............................................................................................12
1.7.4 IDENTIFIED HAZARDS.........................................................................................12
1.7.4.1 Weight and Impact..........................................................................................12
1.7.4.2 Pinch Points....................................................................................................12
1.7.4.3 Cryogenic Gases............................................................................................12
1.7.4.4 Electrical Shock..............................................................................................13
1.7.4.5 Electrostatic Discharge..................................................................................13
1.7.5 SAFETY PRECAUTIONS WHILE IN THE TELESCOPE ENCLOSURE ..............13
1.7.5.1 Emergency Stop Buttons...............................................................................13
1.7.5.2 Determining Why an Emergency Stop Button is Engaged.........................14
1.7.5.3 Investigate Problems Before Continuing.....................................................14
1.7.6 SAFETY INTERLOCKS.........................................................................................14
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2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page iv of 43
1.7.6.1 Manual Reset ..................................................................................................14
1.7.7 ACCIDENTS OR INCIDENTS................................................................................14
1.8 MODES OF OPERATION............................................................................................15
1.8.1 LOCAL (ON-SITE) MODE .....................................................................................15
1.8.2 REMOTE MODE ....................................................................................................15
1.9 PRECAUTIONS BEFORE, DURING AND AFTER OPERATION...............................15
1.9.1 CHECKING THE OPERATIONAL STATUS OF THE SYSTEM............................16
1.10 GENERAL TELESCOPE SYSTEM INFORMATION...................................................16
1.10.1 SYSTEM POWER REQUIREMENTS....................................................................16
1.10.2 DC POWER SUPPLIES.........................................................................................16
1.10.3 MOTORS................................................................................................................16
1.10.4 EMERGENCY STOP BUTTON CONNECTIONS..................................................16
1.11 MAINTENANCE CONCEPT........................................................................................16
CHAPTER 2 PREVENTIVE MAINTENANCE .................................................. 18
2.1 PREVENTATIVE MAINTENANCE TASKS.................................................................18
2.2 GENERAL INSPECTION.............................................................................................19
2.2.1 CABLE WEAR.......................................................................................................19
2.2.2 STRUCTURAL FASTENING.................................................................................19
2.2.3 CORROSION .........................................................................................................19
2.2.4 ENVIRONMENT.....................................................................................................19
2.3 TELESCOPE CONTROL CABINET............................................................................20
2.3.1 INDICATOR LAMPS..............................................................................................20
2.3.2 COOLING FANS....................................................................................................20
2.3.3 VOLTAGE CHECK ON DC POWER SUPPLIES ..................................................21
2.4 TESTING EMERGENCY STOP BUTTONS ................................................................21
2.5 ENCODER TAPE CLEANING.....................................................................................22
2.5.1 REQUIRED TOOLS AND EQUIPMENT................................................................22
2.5.2 TIME REQUIRED...................................................................................................22
2.5.3 FREQUENCY.........................................................................................................22
2.5.4 PROCEDURE ........................................................................................................22
2.6 LUBRICATING THE AZIMUTH AND ELEVATION DRIVE BEARINGS.....................23
2.6.1 PURPOSE..............................................................................................................23
2.6.2 REQUIRED TOOLS AND EQUIPMENT................................................................23

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
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2.6.3 TIME REQUIRED...................................................................................................23
2.6.4 FREQUENCY.........................................................................................................23
2.6.5 PROCEDURE FOR AZIMUTH BEARING LUBRICATION ...................................23
2.6.6 PROCEDURE FOR ELEVATION BEARING LUBRICATION...............................24
2.7 CLEANING THE PRIMARY MIRROR (M1) COVERS.................................................24
2.7.1 PURPOSE..............................................................................................................24
2.7.2 RECOMMENDED FREQUENCY...........................................................................25
2.7.3 EQUIPMENT AND TOOLS REQUIRED................................................................25
2.7.4 PROCEDURE ........................................................................................................25
2.8 CLEANING OPTICS....................................................................................................25
2.8.1 PURPOSE..............................................................................................................25
2.8.2 EQUIPMENT AND TOOLS REQUIRED................................................................25
2.8.3 CLEANING THE PRIMARY MIRROR ...................................................................26
2.8.3.1 Recommended Frequency.............................................................................26
2.8.3.2 Procedure........................................................................................................26
2.8.4 CLEANING THE SECONDARY MIRROR (M2).....................................................26
2.8.4.1 Purpose...........................................................................................................26
2.8.4.2 Recommended Frequency.............................................................................26
2.8.4.3 Equipment and Tools Required ....................................................................26
2.8.4.4 Procedure........................................................................................................27
2.8.5 CLEANING THE TERTIARY MIRROR (M3)..........................................................27
2.8.5.1 Purpose...........................................................................................................27
2.8.5.2 Recommended Frequency.............................................................................27
2.8.5.3 Equipment and Tools Required ....................................................................27
2.8.5.4 Procedure........................................................................................................27
CHAPTER 3 CORRECTIVE MAINTENANCE.................................................. 28
3.1 RECOATING THE PRIMARY MIRROR ......................................................................28
3.1.1 PURPOSE..............................................................................................................28
3.1.2 RECOMMENDED FREQUENCY...........................................................................28
3.1.3 PROCEDURE FOR REMOVING AND INSTALLING THE PRIMARY MIRROR
(M1)..................................................................................................................28
3.2 REMOVING THE SECONDARY MIRROR (M2) FOR RECOATING ..........................29
3.2.1 PURPOSE..............................................................................................................29

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page vi of 43
3.2.2 RECOMMENDED FREQUENCY...........................................................................29
3.2.3 EQUIPMENT AND TOOLS REQUIRED................................................................29
3.2.4 TIME REQUIRED...................................................................................................29
3.2.5 PROCEDURE FOR REMOVING THE SECONDARY MIRROR ASSEMBLY.......29
3.2.6 PROCEDURE FOR REMOVING THE SECONDARY MIRROR FROM THE
SUPPORT........................................................................................................32
3.2.7 PROCEDURE FOR REINSTALLING THE SECONDARY MIRROR TO THE
SUPPORT........................................................................................................33
3.2.8 PROCEDURE FOR REINSTALLING THE SECONDARY MIRROR ASSEMBLY34
3.3 REMOVING THE TERTIARY MIRROR (M3) FOR RECOATING ...............................35
3.3.1 PURPOSE..............................................................................................................35
3.3.2 RECOMMENDED FREQUENCY...........................................................................35
3.3.3 EQUIPMENT AND TOOLS REQUIRED................................................................35
3.3.4 TIME REQUIRED...................................................................................................35
3.3.5 PROCEDURE FOR REMOVING THE TERTIARY MIRROR ASSEMBLY............35
3.3.6 PROCEDURE FOR REMOVING THE TERTIARY MIRROR FROM THE
SUPPORT........................................................................................................37
3.3.7 PROCEDURE FOR REINSTALLING THE TERTIARY MIRROR TO THE
SUPPORT........................................................................................................39
3.3.8 PROCEDURE FOR REINSTALLING THE TERTIARY MIRROR ASSEMBLY.....40
3.4 BALANCING THE TELESCOPE.................................................................................41
3.4.1 PURPOSE..............................................................................................................41
3.4.2 RECOMMENDED FREQUENCY...........................................................................41
3.4.3 TIME REQUIRED...................................................................................................41
3.4.4 PROCEDURE ........................................................................................................41
3.5 OPTICAL ALIGNMENT...............................................................................................43
3.5.1 INDICATION OF FAILURE....................................................................................43
3.5.2 FREQUENCY.........................................................................................................43
3.5.3 PROCEDURE ........................................................................................................43
3.6 STAR MAPPING..........................................................................................................43
3.6.1 INDICATION OF FAILURE....................................................................................43
3.6.2 FREQUENCY.........................................................................................................43
3.6.3 PROCEDURE ........................................................................................................43

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page vii of 43
LIST OF FIGURES
Figure 1 M2 Assembly.......................................................................................................30
Figure 2 M2 Dummy Weight Installed on M2 Focus Stage ............................................31
Figure 3 M2 Assembly with Baffle Holder .......................................................................32
Figure 4 M2 Assembly with Baffle Holder Removed......................................................33
Figure 5 M3 Assembly with Baffle Installed....................................................................36
Figure 6 M3 Assembly with Baffle Removed...................................................................37
Figure 7 M3 Mirror Mount Assembly Removed from Telescope...................................38
LIST OF TABLES
Table 1 Telescope Preventative Maintenance Schedule..............................................18
Table 2 Inspection and Cleaning of Cooling Fans and Filters.....................................20
Table 3 Telescope Corrective Maintenance Schedule..................................................28

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page 8 of 43
Lick Automated Planet Finder
2.4 m Alt-Azimuth Telescope
Maintenance Manual
CHAPTER 1 INTRODUCTION
1.1 INTRODUCTION
The 2.4 meter Alt-Azimuth telescope requires rountine, planned, and corrective maintenance to
keep the telescope in good working condition. All maintenance personnel are required to adhere
to safety precautions while performing maintenance procedures on the telescope. All personnel
present at the observatory must be informed by maintenance personnel whenever any
maintenance procedures are to be performed.
Carelessness may result in damage to the telescope system, or injury and/or death to the
maintenance personnel.
The telescope system is comprised of modules that are large and heavy, and optical
components and equipment that are delicate, expensive, and damage easily. The telescope can
move at any time, therefore, all personnel in the observatory must be alert at all times.
EOST and its related entities take no responsibility and shall not be liable for any injury, loss or
damage (including death) which results from the operation, use or maintenance of the telescope
and related systems, including the use of or reliance upon the contents of this manual. Such
operation, use or maintenance of the telescope and related systems, including use of or reliance
upon this manual is at the Customer’s own risk.
Personnel operating, maintaining and performing work on or around the telescope and related
systems should take all reasonable and necessary care for their safety, health and well-being
and the directions, instructions and advice provided in this manual should not be followed as a
substitute for observing safe work methods, or where injury, loss or damage may occur.
1.2 SCOPE
This document describes the plan to maintain the 2.4 meter Alt-Azimuth Telescope. This plan
outlines the philosophy used for designing maintainability into the telescope and identifies the
major maintenance tasks required.
1.3 CONFIGURATION
This manual has been configured as MM-12920-1 and is a designated controlled document
under the EOST Quality System.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page 9 of 43
1.4 REFERENCES
•Assembly Drawings
•Electrical Schematics
•Optical Alignment Procedure ASP-13964
•Primary Mirror Removal and Installation Procedure ASP-13952
•Software User Manual SUM-13948
1.5 DEFINITIONS AND ACRONYMS
•DC: Direct Current
•EOST: EOS Technologies, Inc.
•ESD: Electrostatic Discharge
•ESTOP: Emergency Stop button
•HV: High Voltage
•OEM: Original Equipment Manufacturer
•OSS: Optical Support Structure
•OTA: Optical Truss (Tube) Assembly
1.6 CONVENTIONS
The following conventions are used in this document to alert the reader:
Notes
Caution
CAUTION: A yellow caution box alerts the reader to possible damage to
equipment.
Warning
WARNING! A warning box contains information alerting the reader to situations
or circumstances that may cause personal injury or death to
individuals working in the observatory or around the telescope.
1.7 SAFETY
Safety of maintenance personnel is extremely important when servicing the telescope. Safety
equipment should be worn when appropriate. Avoid wearing loose clothing that may get caught
NOTE: The note box contains helpful information about a topic being
dicsussed.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
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in moving parts of the telescope during maintenance. Eye glass straps are recommended for
maintenance personnel wearing eyeglasses when working from heights and around optics.
WARNING! All individuals present in the observatory during maintenance must
be alerted that maintenance procedures are going to be in progress
for the duration of the day.
Telescope and dome operation is very quiet, always observe all
cautions and warnings to prevent damage to equipment or injury to
individuals.
1.7.1 DESIGNED FOR SAFETY
The telescope is designed for safety of personnel and equipment while satisfying performance
requirements. Where the existence of a potential hazard can not be eliminated without
substantial performance or maintenance impact, interlocks are employed to minimize the
possibility of injury to individuals or damage to equipment. In locations where interlocks are
impossible, or expected to be ineffective, warnings and procedures will be developed to
minimize the risk of damage or injury.
1.7.2 PRECAUTIONS DURING MAINTENANCE
To avoid injury and or death to maintenance personnel and other individuals present in the
observatory, follow the safety measures described below.
WARNING! Alert all personnel at the site that the equipment is undergoing
maintenance.
Wear safety equipment, such as a hard hat (except when working
with optics), steel toed safety shoes and avoid wearing loose
clothing items.
Disconnect power before attempting work or performing
maintenance. “Lock out” and “Tag out” all power sources to
prevent death or injury.
Turn off all power sources before connecting or disconnecting
cables.
Do not attempt to service the system while it is in operational mode.
Install axis locks before attempting to perform maintenance.
Elevation axis locks are not to be used in an out-of-balance
situation. A second safety device must be attached to ensure that
the telescope does not move unexpectedly.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
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To prevent damage to equipment during maintenance procedures, review the following caution
statements.
CAUTION: Keep dirt and dust away from the optics by keeping covers closed
whenever possible.
Wear a grounding wrist strap whenever performing electronics
maintenance to reduce the risk of ESD damage.
Replace blown fuses only with identical fuses of the same current
rating and type to avoid fire hazards and equipment damage.
The telescope system must be securely and adequately grounded
whenever power is applied. During operation, grounding is
accomplished through the connections to the building.
Protect cables from contact with sharp objects. Do not kink cables
and never allow the cables to come in contact with oil, grease, hot
surfaces or chemicals.
After maintenance or installation, carefully inspect the area to
ensure that all tools, cleaning cloths, loose parts and so forth are
not left on or near the telescope, dome or Telescope Control
Cabinets.
Never touch any optical surface when working close to a mirror.
Clean optical surfaces using only approved procedures and
materials.
1.7.3 SAFETY FEATURES
The telescope incorporates the following safety features:
1.7.3.1 Handles
Handles are provided for items that must be routinely moved manually. These are intended to
minimize the risk of injury from improper lifting, or damage from dropping the item.
1.7.3.2 Lifting Points
Identifiable lifting points are included in appropriate locations to reduce the risk of damage
resulting from improper rigging.
1.7.3.3 Axis Locks
Elevation axis locks are provided to lock the axis in position for alignment, maintenance or
inspection.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
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1.7.3.4 Self-Sealing Fittings
Self-sealing fittings are used for coolant lines to minimize spillage.
1.7.3.5 Over-current Protection Devices
The telescope control system incorporates various over-current protection devices, including
fuses and circuit breakers. In addition, the power supplies employed are self-protected against
over-current.
1.7.3.6 Connector Uniqueness and Pin Arrangement
Where reasonable, unique connectors are used to minimize the risk of incorrectly connecting
the instrument. Within each connector, pins are arranged to reduce the risk of damage due to
partial or an incorrect connection.
1.7.3.7 Interface to Observatory Interlock System
The telescope is be interfaced to the observatory interlock system. Activating any Emergency
Stop button in the enclosure disables power to the dome and telescope drives.
1.7.3.8 Failsafe Design
Whenever possible, the telescope has been designed to fail in a safe manner when a fault
occurs.
1.7.4 IDENTIFIED HAZARDS
The following hazards were identified during the conceptual design process:
1.7.4.1 Weight and Impact
The telescope is a heavy piece of equipment that could cause serious injury or death, or be
damaged if dropped or mishandled during maintenance or removal and installation of optics. If
moved quickly during handling, it will develop substantial momentum and serious injury could
result to a person or object between the telescope and an immovable object. Any collision with
the building or other equipment could result in shocks that cause damage.
1.7.4.2 Pinch Points
Pinch points may exist in several areas within the telescope and may be unavoidable due to
constraints within the building. Crushing or shearing injuries may result if objects or body parts
are placed in these areas.
1.7.4.3 Cryogenic Gases
If cryogenic gases are supplied to instruments on the telescope, they may present a hazard.
Since EOST is not providing any equipment or components that require cryogens, special
precautions or markings are not provided. If features requiring cryogens are implemented later,
EOST recommends a safety review to identify any necessary safety features that should be
added.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
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1.7.4.4 Electrical Shock
The main supply power presents a risk of electrical shock. This risk is minimized through
isolation and procedures. In addition, several devices will require high voltage power supplies
that may be hazardous. These will be shielded and separately enclosed where possible, with
warning labels attached.
WARNING!: Use extreme caution when working on or around telescope or dome
electrical components.
1.7.4.5 Electrostatic Discharge
Static electricity may damage some sensitive electronic devices attached to the telescope.
Photo detectors and CCDs are especially vulnerable. Adequate grounding is provided to protect
against this hazard during operation. ESD safe repair procedures should be followed to
minimize the risk of ESD damage during scheduled maintenance.
1.7.5 SAFETY PRECAUTIONS WHILE IN THE TELESCOPE ENCLOSURE
Follow all safety rules when in the enclosure and be alert. Keep a safe distance from the
telescope or enclosure (dome) while they are in use, even if the telescope and dome appear
stationary. If the system is in the middle of tracking, or is being controlled remotely, it can
suddenly and unexpectedly move at any time. Casual visitors to the dome are strongly
discouraged. Avoid wearing any loose fitting clothing items when working around the telescope
enclosure.
1.7.5.1 Emergency Stop Buttons
The telescope is outfitted with Emergency Stop buttons that should only be used for emergency
purposes to stop telescope and or dome movement. Under non-emergency conditions, the
telescope should only be stopped using software commands.
CAUTION: Do not use the Emergency Stop button to turn off power while the
telescope is moving, as damage to telescope or dome drive
mechanisms may occur.
The Emergency Stop button ensures the telescope and dome will not begin to move
unexpectedly. This is particularly important because the telescope and dome can be operated
remotely via an Internet connection.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
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WARNING!: Whenever working on or near a moving part of the telescope and
dome, ensure that a nearby Emergency Stop button is engaged.
Always attach a sign to the button to warn other individuals on-site
not to disengage the Emergency Stop button.
The Emergency Stop buttons do not normally prevent the operation
of the shutter on the enclosure. Shutter buttons generally are setup
to override the Emergency Stop buttons, allowing the shutter to be
closed (or opened) in an emergency. Ask the appropriate
observatory personnel about the operation of shutter mechanisms
on the enclosure.
Generally, it is recommnded that shutters be controlled via software
commands to avoid an override situation of the end-of-travel limit
switches. The shutter can be damaged by being driven into an end-
stop.
1.7.5.2 Determining Why an Emergency Stop Button is Engaged
If an Emergency Stop button is engaged, do not disengage it before determining the reason for
the button being engaged. Someone may be working on the telescope and dome or may have
discovered a problem and engaged the button to prevent damage to the system.
1.7.5.3 Investigate Problems Before Continuing
If a problem has occurred (for example, if the telescope or dome stops tracking), determine the
cause of the problem before attempting the operation again or rebooting the system.
CAUTION: Damage to the telescope or dome may have occurred, or damage
may be prevented by removing the cause of the problem.
1.7.6 SAFETY INTERLOCKS
Limit Switches are controlled by Software and Hardware.
The limit switches, located on the Azimuth base and Elevation optical support structure (OSS)
prevent the OSS from being driven beyond a specific point.
1.7.6.1 Manual Reset
Whenever the emergency stop buttons are engaged, a manual reset is required. The manual
reset is performed by manually disengaging each emergency stop button in the observatory.
1.7.7 ACCIDENTS OR INCIDENTS
Report all accidents or incidents as soon as possible when they occur to authorized engineering
support personnel. This may prevent further damage or injury from occurring, and helps to

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page 15 of 43
ensure it does not occur again. Advice can be provided on the possible consequences to
system performance and suggested tests to conduct to determine if damage has occurred and
whether the system is operational.
1.8 MODES OF OPERATION
The observatory has two basic modes of operation:
•Local
•Remote
Local and remote modes appear to users as essentially the same; the observatory is controlled
in real-time via appropriate user interfaces. In local mode, the user is specifically using the on-
site control computer whereas in remote mode, the user may be located anywhere on the
network (for example, Local Area Network/Wide Area Network (LAN/WAN) or Internet).
The main distinction between these two modes of operation lies in the rights of access granted
to particular types of users. For example, certain local users have the right to issue engineering-
level commands to the system which are not available to remote users.
1.8.1 LOCAL (ON-SITE) MODE
In local (on-site) mode, the user is specifically using the on-site control computer and the
observatory is controlled in real-time via appropriate (hardware and software) user interfaces.
1.8.2 REMOTE MODE
In remote mode, the user may be located anywhere on the ‘network’ (LAN/WAN or Internet) and
the observatory is controlled in real-time via appropriate (software) user interfaces.
1.9 PRECAUTIONS BEFORE, DURING AND AFTER OPERATION
The telescope should only be operated by trained personnel, or under the guidance of trained
personnel.
•Inspect the telescope daily to detect and correct any unsafe operating conditions.
•Periodically check all safety devices for proper operation. See Chapter 2 for more details.
•Avoid intentionally driving the telescope into a hard stop; use software commands to stop
the telescope.
•Do not operate the telescope at speeds or accelerations in excess of those for which it is
rated.
•Do not stop the telescope quicker than the rated stopping speed.
•Do not use the Emergency Stop buttons to stop the telescope during non-emergency
situations; stop the telescope with software commands.
•Immediately report any problems to the observatory safety officer.
CAUTION: If the power to the telescope or dome has been turned off,
investigate the reason why before attempting to start the system up.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
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The system may have been turned off because a serious fault was
observed, and turning it on again could damage system
components.
1.9.1 CHECKING THE OPERATIONAL STATUS OF THE SYSTEM
At the start of each session, if the observatory has a logbook or a notice board, check to
determine whether the telescope and dome are operational, whether any new problems have
surfaced or old ones have been solved, and to review the existing known problems.
1.10 GENERAL TELESCOPE SYSTEM INFORMATION
This section includes information on the system power requirements, motors, KVM switch,
digital input/output subsystem, the encoder input/output subsystem, and the connection and
termination of the emergency stop buttons to the drive motors and any other motors.
1.10.1 SYSTEM POWER REQUIREMENTS
The system power requirements are 120 VAC and 28 VAC RMS (2-phase).
A backup generator that works with the uninterrupted power supply (UPS) is being provided by
the customer.
1.10.2 DC POWER SUPPLIES
The DC power supplies are:
24 Volt Power Supply
96 Volt Power Supply (two 48 VDC supplies in series)
1.10.3 MOTORS
The motors that operate the telescope system are direct drive DC brushed motors. DC right
angle gear motors operate the mirror covers.
1.10.4 EMERGENCY STOP BUTTON CONNECTIONS
The Emergency Stop buttons (e-stop) are connected in series and terminate at the digital I/O
box on the telescope control cabinet. Engaging an e-stop causes power to the drive motors and
any other motors or moving parts to be shut off by disabling the power amplifiers. This is
accomplished in hardware. Being connected in series enables the customer to install additional
e-stops anywhere in the observatory.
If a cable became damaged, it would trigger the e-stop, shutting off power to all drive motors
and any other motors and moving parts on the telescope.
1.11 MAINTENANCE CONCEPT
Maintenance of the telescope is divided into two regimes: preventive maintenance and
corrective maintenance.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page 17 of 43
•Preventive maintenance tasks are those tasks to be performed regularly to ensure the
continued operation of the telescope at the specified level of performance throughout its
design lifetime. These tasks must be performed at the specified time, regardless of whether
symptoms are exhibited by the telescope.
CAUTION: Failure to perform preventive maintenance may result in premature
failure of telescope components and/or the failure of the telescope
to perform within specification.
•Corrective maintenance tasks are required only to remedy a failure of a particular
component or subassembly. Corrective maintenance involves replacing one or more field-
replaceable units and, in some cases, realigning or recalibrating the telescope.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page 18 of 43
CHAPTER 2 PREVENTIVE MAINTENANCE
2.1 PREVENTATIVE MAINTENANCE TASKS
The preventative maintenance tasks in this chapter are included in the recommended
maintenance schedule shown in Table 1.
Table 1 Telescope Preventative Maintenance Schedule
PROCEDURE DURATION FREQUENCY
General visual inspections:
Cable wear
Structural fasteners
Corrosion
Environment
(section 2.2)
30-45 minutes
15 minutes
Daily / Weekly
Monthly
Telescope Control Cabinet:
Indicator Lamps
Cooling Fans
DC Power supply voltage check
(section 2.3)
15 minutes
5 minutes
5 minutes
Weekly
Monthly or more often as needed
Monthly
Emergency Stop Buttons
(section 2.4) ~1 minute per button Monthly
Cleaning the Encoder Tape:
Encoder Tape and Encoder
Ring Cleaning
(section 2.5)
30-45 minutes / axis Normal conditions: bi-annually
Severe dust conditions: every 3
months
Lubricating the Azimuth and
Elevation Drive Bearing
(section 2.8.3)
30 minutes / axis Yearly
Primary Mirror Covers Cleaning
section 4) 15 -30 minutes Monthly
Primary Mirror (M1) Cleaning
(section 2.8.3) 30 minutes for CO2Monthly or more often as needed.
Secondary Mirror (M2) Cleaning
(section 2.8.4) 30 minutes for CO2Monthly or more often as needed.
Tertiary Mirror (M3) Cleaning
(section 2.8.5) 30 minutes for CO2Monthly or more often as needed.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page 19 of 43
2.2 GENERAL INSPECTION
Perform a general inspection of the telescope system by walking completely around the
telescope and visually inspect the base, fork, and OTA. These preventative measures should
and can easily be implemented as system checks prior to telescope operation. Note any
discrepancies in the maintenance log book.
2.2.1 CABLE WEAR
1. On a daily/weekly basis, visually inspect the condition of the cables in the base, fork side,
and at the secondary mirror assembly.
2. Note the conditions of all of these cables in the maintenance log.
3. If cable wear is present, thoroughly document the condition of the cable and take
photographs of the wear.
4. Contact the maintenance personnel and provide the description and copies of the
photographs of the cable wear.
2.2.2 STRUCTURAL FASTENING
Use tamper proof markers (where possible) to identify critical structural fasteners of the
assembly, enabling service technicians to be able to clearly see fasteners which may become
loose over time. Tamper proof markers are used for items such as the azimuth and elevation
drives, elevation bearings, mirror cover assemblies, or even telescope hold down bolts.
2.2.3 CORROSION
Inspecting for corrosion helps to prevent fasteners and members from binding over time. Any
early signs of corrosion can be corrected to prevent further degradation of hardware, cables,
and maintain the telescope’s appearance.
1. Perform a visual inspection of any accessible parts on the telescope to ensure that
telescope parts and fasteners are free of corrosion.
2. Visually inspect the cables for corrosion at the terminating ends of the telescope and
telescope control cabinet.
3. Record preventive maintenance completed in the log book.
2.2.4 ENVIRONMENT
Routine checks of the telescope’s operational environment helps lead to low maintenance and
lessens the likelyhood of severe damage to the telescope structure.
NOTE: Record all maintenance that has been performed in a log book and
store it with the telescope in an obvious location for future use and
reference.

2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009 Tel: [phone] • Fax: [phone] • Web: www.eostech.com Page 20 of 43
CAUTION: During dome maintenance, the telescope can easily become a
convenient work bench. Service personnel must ensure that any
equipment placed on the telescope is removed prior to telescope
operation, as damage to optics or the telescope structure could
occur.
2.3 TELESCOPE CONTROL CABINET
The telescope control cabinet houses the electronics for the telescope system.
2.3.1 INDICATOR LAMPS
1. On a weekly basis, verify that all indicator lamps on the front are operational.
2. Press the test button to illuminate all lamps.
3. Replace any burned out indicator lamps, as needed.
2.3.2 COOLING FANS
There are several different types of cooling fans located in the telescope control cabinet that
require routine inspection and cleaning. Although a monthly inspection and cleaning of fans is
recommended, environmental conditions may require more frequent cleaning of the fans and
filter. See Table 2.
Table 2 Inspection and Cleaning of Cooling Fans and Filters
Fan / Filter Frequency
Drive amplifier fans monthly
System fan monthly
Inlet filter (bottom of cabinet) bi-monthly
Computer fans monthly
1. Inspect and clean all drive amplifier fans every 30 days (monthly).
2. Open the front panel of the telescope control cabinet and examine the two (2) cooling fans
for the two (2) drive amplifiers located in the encoder planers. These cooling fans exhaust
heat from the inside of the encoder planar.
3. Inspect the two (2) fans in the Elevation and the Azimuth panel.
4. On the top of the telescope control cabinet, examine the system fan.
5. Test the system fan by applying heat from a heat gun to the thermostat, located inside of the
telescope control cabinet, to trigger the fan to run when the predetermined temperature
inside of the cabinet is reached.
6. If dust or dirt is present on the grill, vacuum with a soft brush attachment.