manual signal test unit stu-20 -...

Manual

Signal Test Unit STU-20

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Contents

1. Contents of delivery 4

2. Installation 42.1. System Requirements 42.2. Software installation 42.3. Hardware installation 6

3. Connectors and displays 73.1. Front panel 73.2. Rear panel 83.3. Hardwareconfiguration 8

4. Functional description 104.1. General 104.2. Start the program 114.3. Select the AMOSIN®-Type 124.4. Counter / Meter 144.5. Airgap measurement 154.6. Oscilloscope function 174.7. Signal accuracy measurement 184.8. Reference Marks Test Function 20

5. Absolute systems & STU-20 22 5.1 General 22 5.2 Selection of the AMOSIN-Type which should be tested 22

6. Cable Sets for the STU-20 236.1 for Inkremental Systems 236.2 for Absolute Systems 23

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Contents of delivery1.

The following components belongs to the STU-20:

Signal Test Unit STU-20 ■

Power supply 12VDC/500mA ■

USB-Cable ■

1 extension cable ■

Software on CD-ROM ■

Installation2.

System Requirements2.1.

Operating system: Windows2000 or higher USB-Port: USB 2.0 Display resolution: 1024 * 768 or higher

Software installation2.2.

It is strongly recommended to exit all programs before running the installer. Start thefilesetup.exelocatedontheCD-ROMdeliveredtogetherwiththeSTU-20.

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Initialization2.2.1

Please wait while the installer initializes.

Destination directory2.2.2

Select the installation directory for the STU-20 software components. As a standard there is a different path for the National Instruments software. You can select the same path as for the STU-20 software components if you like.

After that please accept the National Instruments Licence Agreement.

Finishing the installation2.2.3

Aftertheinstallationhasfinishedpleaserestartthecomputer.

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Hardware installation2.3.

After the successful installation of the software connect the STU-20 to the computer with the USB-cable. The assistant for installation of a new hardware appears.

Disable the connection to “Windows Update” for this hardware installation and choose the automatic installation for the software in the next window.

Tofinishtheinstallationclickonthebutton“Finish”.

Now the STU-20 is installed completely, you can start the program using “Start->Programs->STU-20”.

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Connectors and displays3.

Front panel3.1.

(1) Connector for the measurement system Pin assignement see Chapter “Pin Assignements -> 12 pin Connei Connector”

(2) Connector for the CNC-controller or the terminating connector (see 3.3.„Hardwareconfiguration“)

(3) Power-On LED Led is on, when power supply for the measurement system is switched on.

(4) Mounting Indicator Additional display of the measured airgap (see chapter „Airgap measurement)

(5) +5V Adjust Potentiometerforadjustingthesupplyvoltageforthemeasuring system to 5.0V.

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Rear panel3.2.

(1) USB-Port

(2) Connector for power supply Supplyvoltage:12VDC/500mA

Hardware configuration3.3.

Open loop configuration3.3.1

Encoder will be connected directly to the STU-20, no connection to the control-ler.

Connect the encoder to the „Encoder“ input of the STU-20 and the „termination connector“ (for incremetal) to the „Controller“ input of the STU-20. Encoder will be supplied by STU-20.

AbtastkopfReading head

AbschlusssteckerTermination connector

STU-20

für inkrementelle Systeme for incremental Systems

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Closed loop configuration3.3.2

Connect the encoder to the „Encoder“ input. Connect the controller to the „Controller“ input using the adapter cable included indelivery. Theencoderwillbesuppliedfromthecontroller.Axiscanbemovedinclosedloop.

In closed loop mode the „Airgap measurement“ as described in 4.5 cannot be used.

AdapterkabelAdapter cable

Anschluss an Folgeelektronik (Steuerung)Connection to subsequent electronics (N.C.)

STU-20


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Functional description4.

General4.1.

The STU-20 offers the following functions:

Selection of the AMOSIN-Type which should be tested.

Indicatorforthesupplyvoltageandthecurrentconsumption,aswell as a position display.

Examination of the correct air gap for an mounted measuring system.

Examination of the output signals with a built-in oscilloscope function.

Signal accuracy measurement

Reference Marks position check

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Start the program 4.2.

TheprogramisstartedovertheWindowsStartMenu“Start->Programs->STU-20”.

Asafirststeptheinitializationofthehardwaretakesplace.

If the STU-20 is not connected with the computer by the USB cable, the pro-gram stops with an error message “Hardware Init Failed”.

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Select the AMOSIN®-Type4.3.

By clicking on the button the window for selecting the AMOSIN®-type appears.

Tab „Last used types“:

This tab shows the recently used encoder types, select the encoder type you want to test and click the OK - button.

Tab „All encoder types“:

Thistaballowsaselectionofallavailableencodertypes

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Procedure for selection:

a) Selection of „Typ“: WMK ... Angle measuring system LMK ... Length measuring system

b) Selection of „Signal“: 1Vss ... analog output signal TTL ... digital output signal

c) Select the correct AMOSIN®-type from the list.

d) For angle measuring systems only:

Enterthenumberofpitchesperrevolutionoftheflangeintotheinputfield“Scale;Pitches/Rev”.

Example: For a measuring system WMK-201.10-0512-1-6 the correct Value is 512pitchesperrevolution.

e) Ifthedesiredselectionisdone,confirmbypressing“OK”.

After selection of the AMOSIN® -type the data of the measurement system appear in the upper third of the program window.

Type: selected AMOSIN®measuring system Output: output signal type Resolution: resolution of the output signal Scale Pitch: grating pitch of the scale Pitches/Rev: numberofpitchesperrevolution Max. Speed: max. speed during any measurements

MHS-Systems:

The MHS-System has an external power supply (24V). Butthe[POWER-ON]intheSTUmuststillbeactivated.

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Counter / Meter4.4.

By clicking the button the Counter / Meter – window appears.

Supply Voltage:

IndicatesthesupplyvoltagemeasuredontheSense-Linesofthemeasurementsystem.Thesupplyvoltagecanbeadjustedto5.0Voltwiththepotentiometerlocated on the front panel of the STU-20.

On connector types without Sense-lines (9pol. Sub-D and 12pol. DIN)themeasurementindicatesthevoltageontheconnector.Especiallyongreatercablelengthtakeintoaccountthevoltagedropon the measurement system cable and an additional extension cable.

Current:

Indicates the current consumption of the measurement system.

Position display:

The position display indicates the position in degrees for angle measurement systems or in mm for length measuring systems.

By clicking on the „Res“-Button the display can be set to zero.

By clicking on the „RI“-Button the reference signal can be enabled/disabled.

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Airgap measurement4.5.

By clicking the button the window for the examination of the correct air-gap appears.

General4.5.1

WiththisToolthecorrectvalueoftheairgapcanbeexamined.Theadherenceto other assembly tolerances such as axial disalignment or parallelism betwenn scale and measuring head cannot be examined (these tolerances are usually givenbytheconstructionofthemechanicsandcannotnotbeaffectedbytheassembling of the measuring system).

This tool cannot be used for the following measurement system types:

measurement systems with serial numbers, where the last 3 digits are ■less than 230 (e.g.: SN: 0601234-212).

workingwith„closedloopconfiguration“see3.3.2. ■

measurementsystemswithoutlimitswitchpins(LLu.LR)availableon ■the connector (e.g.: 9pol. Sub-D-connector or connectors with special pin assignements).

following measurement systems: ■WMK-x02.A-xxxx WMK-x02.B-xxxx

MHSsystemswithsystemfirmwarelessthan152(last3digitsinserial ■number. e.g.: SN: 0601234-142) and STU Software before build 299 (V2.1_build299)

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Measurement procedure4.5.2

For MHS systems before air gap measurement there is an opportunity to select the head for test. The measurement procedure is started by clicking the button „Start Test“. Afterwardstheaxismustbemovedorturnedcontinuouslyinonedirection.Afteramovementofapprox.from30to70mmthedeterminedairgapisindicatedgraphically on the monitor and by the indicator LED at the front panel of the STU-20.

The different colored areas can be interpreted as follows:

thegreenareasymbolizesamountingwithinthehalfairgaptolerance; ■Indicator LED shines continuously.

Theyellowareasymbolizesamountingwithintheairgaptolerance; ■IndicatorLEDisflashing.

Theredareasymbolizesamountingoutoftheairgaptolerance; ■Indicator LED is dark

It is recommended to adjust the measuring system in such a way that the airgap liesovertheentirepossiblemovementoftheaxiswithinthegreenrange.

By changing of measuring head position during the measurement, repeat Air gapmeasurementoncemoreforfinalposition.

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Oscilloscope function4.6.

By clicking on the button the oscilloscope window appears.

The oscilloscope can be used for the examination of the output signals of the measurement system.

Functionality:

Timebase and Amplitude adjustable in steps. ■

Trigger function to trigger on the reference signal ■

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Signal accuracy measurement4.7.

By clicking on the button the signal accuracy window appears.

General4.7.1

With this tool the signal accuracy can be examined. That means this measure-menttakesintoaccountallmechanicaldeviationsfromidealmounting.

Measurement procedure4.7.2

Afterstartingthemeasurementtheaxishastobemovedwithuniformspeedasgoodaspossible.Whenthemovementwasdonewithuniformspeedforacertain number of periods the data aquisition stops and the signal accuracy will beevaluatedanddisplayed.

The necessary uniformity of speed to trigger the aquisition can be adjusted usingtheknob„Achievableuniformityofspeed“.

Thenumberofsignalperiods(i.e.thenecessarylengthofmovementthathastobe done with uniform speed) can be adjusted using the knob „Measuring length for data aquisition“

For higher adjusted „measuring length“ and „speed uniformity“ the measuring results are more accurate and repeatable.

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Thesethresholdvaluesmustbesetashighasposiblethespecifictestapplica-tion allows.

Lowering the measuring length and uniformity of speed increases the uncertain-ty of measurement.

Byactivatingthebutton„Reference“themeasurmentcanbetriggeredonthereference signal of the encoder.

Interpretation of the measuring results4.7.3

The measured signal accuracy will be displayed at the bar graph „System accu-racy“.

Results higher than 0,7 indicates a high signal accuracy. Results inbetween 0,7 and 0,4 indicates that signal accuracy is good but can be increasedbyimprovingthemechanicalmountingconditions. Results less than 0,4 indicates a low signal accuracy maybe caused by moun-ting conditions that are out of tolerance.

Theinterpretationofthemeasuringresultscandifferfromthatstatedaboveanddependsonthetypeofaxis,kindofdriveetc.

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Reference Marks Test Function 4.8.

By clicking on the button the Reference Marks window appears. MeasurementMUSTalwaysbedonebymovingthereadinghead inthepositivedirection.Movingtheheadinnegativedirectionor backwardsandforwardsgeneratesinvaliddata.

Measuring systems with singular Reference Mark:4.8.1

a.TheScopeFunctionisusedforscopingthewaveformoftheReferenceMark

b. Using the Counter Function check if counter is reset to „0“ after crossing the Reference Mark

Measuring systems with distance-coded Reference Marks4.8.2

a.TheScopeFunctionisusedforscopingthewaveformoftheReferenceMarks

b. Using the Counter Function check if counter is reset to „0“ after crossing the Reference Marks

c. The RI Check function allows the user to check the distance-coded Reference Marks for:

•Theentirelengthofthescaleorring.The„RICoded-Full“indicatorturnsto green when the entire scale was checked and the result is correct

•Onlyacertainlength/segmentofthescaleorring.The„RICoded-Partial“ indicator turns to green when the segment was checked and the result is correct

•ThePathdisplaysthedistance between two segment reference marks (in numbers of pitches on the scale)

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For Rotary systems:4.8.3

- Enter the Basic Distance, K

- AlltheotherparametersarealreadydefinedafterSelectingtheMeasuring system

- Rotate for one resolution (recommended)

For Linear systems:4.8.4

- Enter the Basic Distance, K

- Choose the Type of the Scale, Typ

- Enter the Entire Length or the Measuring Length of the scale (depends on Scale Type)

The maximum number of Reference Marks that can be measured is automa-ticallycomputedbasedonpitches/revolution(forrotarysystems)oronvaluesentered in „RI Check“ panel (for linear systems). For measuring only a segment from the scale/ring the user must start the measurements and at the end of the desired segment to press the Stop button.

For Rotary Measuring Systems it is highly recommended to perform the Refe-renceMarkCheckforacompleterevolution.

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Absolut systems & STU-205.

General5.1.

Only suitable for absolut systems with incremental 1Vpp output. (see list at point 5.2)

Certainly with absolute systems just these functions are available: •Indicatorforthesupplyvoltageandthecurrentconsumption,aswellasa position display (see 4.4)

•Examinationofthe1Vppoutputsignalswithabuilt-inoscilloscopefunction (see 4.6)

•Signalaccuracymeasurement(see4.7)

When using the STU-20 with one of the absolute cable sets for an open loop configuration,theterminationconnectorforabsoluteSystemshastobe connected to the „Controller“ input.


AbschlusssteckerTermination connector

STU-20

für absolute Systeme for absolute Systems

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Selection of the AMOSIN-Type which should be tested 5.2.

(see point 4.3)

Please choose an incremental (non Absolut) System from the list below which is appropriate to your absolute system.

You want to test: — Please choose:

WMKA-2x100.xx0 — WMK-2x1.x0 WMKA-2x100.xx1 — WMK-2x1.x1 WMKA-2x100.xx2 — WMK-2x1.x2 WMKA-2x100.xx3 — WMK-2x1.x3 WMKA-2x100.xx4 — WMK-2x1.x4 WMKA-2x100.xx5 — WMK-2x1.x5 WMKA-2x100.xx6 — WMK-2x1.x6

LMKA-xx100.xx0 — LMK-1x1.0 LMKA-xx100.xx3 — LMK-1x1.3 LMKA-xx101.xx0 — LMK-1x1.0 (attention: Only with BISS/C with 1Vpp output possible) LMKA-xx101.xx3 — LMK-1x1.3 (attention: Only with BISS/C with 1Vpp output possible)

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Kabel SatzCabel SetKabel SatzCabel Set

Cable sets for the STU-206.

You can choose the cable set you need for your Encoder head:

Inkremental cable sets 6.1.

Encoder head connector: Order code Cable set:15 pol. Sub-D AK-STU-05M23 12 pol. Connei Coupling AK-STU-069 pol Sub-D AK-STU-03M23 12 pol. Connei Connector AK-STU-04

Absolute cable sets 6.2.

Encoder head connector: Order code Cable set:15 pol. Sub-D AK-STU-05AM23 17 pol. Connei AK-STU-07A

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A-4963St.PeteramHart,Nöfing4-Austria

Phone: +43 7722 65856 - 0 Fax: +43 7722 65856 11 email:[email protected]

www.amo-gmbh.com

AMO GmbH

SN: M_STU-20_V3.0_2015_06_25

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