AMO STU-60 User manual

August 2019
Manual
STU-60
Diagnostic tool

2
Table of content
Overview
1. Basics
1.1 Handling of the user manual
Notes on reading the documentation
Storage and distribution of the documentation
Target groups for the instructions 4
Notes in this documentation
1.2 Safety
General safety precautions
Intended use 5
Improper use
Personnel qualification
General safety precautions
Electrical safety precautions 6
Safety precautions for operation with and in numerically controlled
machines 7
1.3 Basic information about the diagnostic tool
STU-60 Basic equipment ID 1219160-01 8
STU-60 Scope of delivery
Adapter cable 9
AMO-Check Available functions 10
2. Commissioning
General information 11
2.1 System requirements
2.2 Installation of the AMO-Check software
2.3 Connect Encoder and STU-60 diagnostic tool to the PC 12
Closed Loop 14
Open Loop 15
2.4 Start of the AMO-Check software 16
3. Function "Diagnose"
4. Function Record/Replay 17
5. Single head solution
Selection menus
5.1 Device-Type 19
5.2 Signal Adjustment
Amplitude Sin/Amplitude Cos
Phase Sin/Cos und Offset Sin/Cos 20
Reset Min/Max 21

3
5.3 Incremental Signal Display 21
Circular representation
Time representation 22
Check the reference pulse (RI)
Zoom function 23
6. Multi head solution - MHS
Selection menus
6.1 Device Type 24
6.2 MHS System
Current Mode 25
Offset Function 26
Corrected Error by MHS - Full Flange Turn 28
6.3 Head # 1/2 Incremental Signal Adjustment
Amplitude Sin/Amplitude Cos
Phase Sin/Cos and Offset Sin/Cos 29
Reset Min/Max
6.4 Head # 1/2 Incremental Signal Display 30
Circular representation
Time representation 31
Check the reference pulse (RI)
Zoom function 32
Contact information 34

4
1. Basics
1.1 Handling of the user manual
This user manual is valid for AMO-Check 1.3
(The actual version can be found on our homepage: www.amo-gmbh.com)
The AMO-Check software is compatible with the following hardware:
• STU-60 , ID 1219160-01
Storage and distribution of the documentation
Target groups for the instructions
The instructions must be kept in the immediate vicinity of the workplace and must be available to all person-
nel at all times. The operating company must inform the personnel where these instructions are kept. If the
instructions have become illegible, the operating company must obtain a new copy from the manufacturer.
If the product is given or resold to any other party, the following documents must be passed on to the new owner:
• Addendum (if supplied)
• Operating Instructions
These instructions must be read and observed by every person who performs any of the following tasks:
• Mounting
• Installation
• Operation
• Service, cleaning and maintenance
• Troubleshooting
• Removal and disposal
WARNING
Fatal accidents, personal injury or property damage caused by non compliance with the
documentation!
Failure to comply with the documentation may result in fatal accidents, personal injury or property
damages.
• Read the documentation carefully from beginnin to end
• Keep the documentation for future reference
Notes on reading the documentation

5
Notes in this documentation
Safety precautions
Precautionary statements warn of hazards in handling the product and provide information on their preventi-
on. Precautionary statements are classified by hazard severity and divided into the following groups:
DANGER
Danger indicates hazards for persons. If you do not follow the avoidance instructions, the hazard will
result in death or severe injury.
WARNING
Warning indicates hazards for persons. If you do not follow the avoidance instructions, the hazard could
result in death or serious injury.
CAUTION
Caution indicates hazards for persons. If you do not follow the avoidance instructions, the hazard could
result in minor or moderate injury.
HINWEIS
Notice indicates danger to material or data. If you do not follow the avoidance instructions, the hazard
could result in things other than personal injury, such as property damage.
1.2 Safety
General safety precautions
Intended use
General accepted safety precautions, in particular the applicable precautions relating to the handling of live
electrical equipment, must be followed when operating the system. Failure to observe these safety precau-
tions may result in personal injury or damage to the product.
The product must only be operated when in proper and safe condition. It is intended solely for the following use:
• Diagnostics and adjustment of AMO encoders with incremental interfaces
Any other use or additional use of the product is considered improper use and can result in damage and
hazards.

6
Improper use
In particular, the following uses are not permitted:
• Use with parts, cables or connections that are defective or do not comply with the applicable standards
• Use outdoors, or in potentially explosive environments or fire risk areas
• Use outside the operating conditions specified in "Specifications"
• Any alterations of the product or peripherals that have not been authorized by the manufacturers
• Use as a part of a safety function
Personnel qualification
General safety precautions
Electrical safety precautions
Mounting, installation, operation, maintenance, and disassembly must be done by a qualified service techni-
cian. The service technician must have obtained sufficient information from the documentation supplied with
the product and with the connected peripherals.
He or she must comply with the provisions of the applicable legal regulations on accident prevention.
The safety of any system incorporating the use of this product is the responsibility of the assembler or
installer of the system.
WARNING
Hazard of contact with live parts when opening the wall adapter power supply.
This may result in electric shock, burns or death.
• Never open the housing
• Only the manufacturer is permitted to access the inside of the product

7
Safety precautions for operation with and in numerically controlled machines
WARNING
Hazard of dangerous amount of electricity passing through the human body upon direct or
indirect contact with live electrical parts.
This may result in electric shock, burns or death.
• Work on the electrical system and live electrical components is to be performed only by trained
specialists
• For power connection and all interface connections, use only cables and connectors that comply with
applicable standards
• Have the manufacturer exchange defective electrical components immediately
• Regularly inspect all connected cables and all connections on the product. Defects, such as loose
connections or scorched cables, must be removed immediately
DANGER
Serious personal injury or property damage caused by improper use of the NC!
Improper use caused by incorrect operation of the NC, incorrect NC programming, incorrect or non-opti-
mized machine parameter values
• Acquire fundamental knowledge about machine, servo drives, inverters and NCs as well as their
interaction with the encoders so that faulty behavior of a numerically controlled machine can be
assessed correctly
• Apart from the information in these instructions, observe the specific safety regulations and accident
prevention regulations when handling the respective machines, servo drives, inverters, and NCs
• When the product is installed in a machine or used in other special applications, all safety precautions
detailed in these instructions must be adapted to the respective conditions of use
• Comply particularly with the required adaptations to changed grounding situations during installation and
during connection of the product to the control loop of a numerically controlled machine
• The machine manufacturer must be contacted for fault diagnosis
NOTICE
Damage to internal parts of the product!
If you open the product, the warranty and the guarantee will be void.
• Never open the housing
• Only the product manufacturer is permitted to access the inside of the product

8
1.3 Basic information about the diagnostic tool
The STU-60 is a diagnostic tool and can be used for the checking the functionality and adjustment of incre-
metal AMO Encoders. It provides valuable feedback regarding the correct mounting and the achieved signal
quality. If there are any problems with the enocder, the AMO-Check can help you find the cause quick and
easy.
STU-60 Basic equipment ID 1219160-01
The diagnostic set consists of:
1) STU-60 Diagnostic tool
2) 12 Volt Plug-in power supply (including exchangeable adapters for the most common power grids)
3) Standard Micro USB-B USB-A cable to connect the STU-60 to the PC.

9
Adapter cable
Compatible adapter cables on request (offi[e-mail])
STU-60 Scope of delivery
• STU-60 Diagnostic tool
• Packaging
• Lable (with serial- and part number)

10
AMO-Check Available functions

11
General information
2. Commissioning
NOTICE
Interference from sources of high electromagnetic emission!
Peripheral devices, such as frequency inverters or servo drives, may couse interference.
• To increase the noise immunity to electromagnetic influences, use the optional functional ground
connection as per IEC/EN 60204-1
NOTICE
Engaging and disengaging connecting elements!
Risk of damage to internal components.
• Do not engage or disengage any connecting elements while the unit is under power
NOTICE
Electrostatic discharge (ESD)!
This product contains electrostatic sensitive components that can be destroyed by electrostatic discharge
(ESD).
• It is essential to observe the safety precautions for handling ESD-sensitive
• Never touch connector pins without ensuring proper grounding
• Wear a grounded ESD wristband when handling product connections

12
2.1 System requirements
2.2 Installation of the AMO-Check software
2.3 Connect Encoder and STU-60 diagnostic tool to the PC
RAM: 512MB
OS: Windows Vista, Windows 7, Windows 10
CPU: 1,8GHz
Free Space: 100MB
The istallation file can be downloaded from te homepage:
(http://www.amo-gmbh.com/en/downloads/accessory/)
Choice between 32 and 64 bit version:
Download and install the file "AMO-Check Installer.exe".
WARNING
Danger of fire!
Use of wall adapter power supplies that do not meet the minimum requirements!
• Use only wall adapter power supplies that fulfill or exceed the specified minimum requirements.
DANGER
Risk of electric shock!
Improper grounding of electrical devices may result in serious personal injury or death.
• Use only the wall adapter power supply included in delivery or a unit that has been certified by the
manufacturer.

13
There are 2 possible variants:
In „Closed Loop“ the encoder is supplied by the controller and the output signals of the encoder are
transfered to the controller as usual. The tester is only plugged in between.
In „Open Loop“ the encoder is supplied by the STU-60 and the output signals of the encoder are not
transfered to the controller. So in this case the axis has to be controlled by a motor encoder or moved
manually.
NOTICE
Damage to the product and the encoder caused by incorrect voltage supply range or incorrect
wiring!
An incorrect voltage supply range or incorrect wiring / pin layout may cause damage to the product and the
encoder.
• Note the voltage supply range of the connected encoder
• Verify that the connecting cable between the encoder and the product is correctly wired
• Vacant pins or wires must not be used
• Do not engage or disengage the connecting cable between the encoder and the product while under
power
• The connection of non-AMO encoders to the product and the operation of the product with
non-AMO encoders are at the user’s own risk
The full functionality of the AMO-Check software is available for both variants.
AMO can not guarantee a proper function of the STU-60, above a total cable length of 5 meters.
Reason: The USB-cable is only certified up to 5 meters, beyond that the voltage drop can lead to
disturbances.

The STU-60 directs all signals to the controller and is also supplied by the controller.
Only the adapter cable provided by AMO should be used.
Only the USB cable provided by AMO should be used.
14
Closed Loop:
Step 1:
Connect the controller to the "controller" port of the STU-60 with an adapter cable.
Step 2:
Connect the encoder to the „Encoder“ port of the STU-60 with an adapter cable.
Step 3:
Connect the USB port of the STU-60 and the USB port of your PC with the included USB cable.
The encoder signals and mounting condition can now be checked with the STU-60.

15
Open Loop:
Step 1:
Supply the STU-60 via the 12V DC-line of the included plug-in power adapter.
Step 2:
Connect the encoder to the "encoder" port of the STU-60 with an adapter cable.
Step 3:
Connect the USB port of the STU-60 and the USB port of your PC with the included USB cable.
The encoder signals and mounting condition can now be checked with the STU-0.
Only the plug-in power adapter provided by AMO should be used.
DON´T connect the controller to the "controller" port of the STU-60. This port is not used.
The signals from the encoder are not affected by the STU-60. The STU-60 serves as a control
unit.
Only the USB cable provided by AMO should be used.

16
2.4 Start the AMO-Check software
Double-click to open the "AMO-Check" application:
The AMO-Check start window opens (top left the current revision level is shown).

17
3. Function "Diagnose"
4. Function Record/Replay
All important system information can be read out in the "Diagnose" window. Mounting conditions and the
internal Signals can be checked in real time.
If you want to forward your measurements to the AMO service department, use this function and
send the records via email to: [e-mail]

18
The "Record" function is used to record new measurement data. With the "Browse" button, a folder on the
PC can be selected for a data backup.
When the "Start Recording" button is pressed, the screen capture starts. The recording of the measurement
data is terminated with the "Disconnect" button located at the bottom right.
The "Replay" function is used to play recorded measurement data later. The "Browse" button can be used to
select a recorded file (on the PC/network/USB device). When "Load Record File" is pressed, the playback of
the recording starts. The playback of the measured data is terminated with the "Disconnect" button located
at the bottom right.
When the recordings are played back later, a manual change of the existing functions (SIN / COS,
Magnitude, reference pulse) is necessary.
If, for example, one minute of "SIN / COS" is recorded during recording and then "RI" is recorded
for one minute, the playback window must be switched from the "SIN / COS" window to the "RI"
window.
The playback only works with this function of the AMO-Check software.
The STU-60 does not need to be connected to play the recorded data.

19
5. Single Head Solution
Selection menus
Various functions can be selected using the menu bar.
5.1 Device Type
All known encoder information are listed (name, serial number, interface, etc.).

20
5.2 Signal Adjustment
In this function, the signals read from the encoder are compared with the ideal values set by AMO. Thus, you
can determine the optimal mounting and reposition the encoder if necessary.
Amplitude Sin/Amplitude Cos
Here you can determine the deviation from ideal air gap.
„+“ Air gap too large (Encoder mounted too far away from the scale tape)
„-“ Air gap too small (Encoder mounted too close to the scale tape)
Phase Sin/Cos and Offset Sin/Cos
These measuring values should be always in the green range. Only in the case of a faulty amplitude, these
values will show large deviation from the center point.