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This video will demonstrate

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how to configure the BONDMASTER 600
in pitch-catch mode

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to detect disbonds in
honeycomb composites.

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Basic Pitch-Catch
RF or IMPULSE Setup

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The pitch-catch mode of the
BONDMASTER 600

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subdivides in “RF”

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“IMPULSE” and “SWEPT” methods.

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All methods can be used
with the same probe.

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Configuring the BONDMASTER 600

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for general-purpose disbond
detection is very easy.

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Simply connect the pitch-catch probe,

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and press CONTINUE.

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Select the first application
that is named

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“skin to core disbonds (flat)”.

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Select the proper test frequency

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as recommended by either
the original part manufacturer

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or the inspection procedure.

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Use the reference standard.

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It is very important to understand

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where the reference defects
are on the standard.

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Use the standard drawing

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and mark defects as needed.

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Put the probe on an area

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free of defects
on the standard

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and maintain the probe tips
over the area.

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Press the GAIN key.

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Adjust the gain so that the RF signal

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does not exceed
2 vertical divisions high.

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A total of 1 division high

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is generally a good start.

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Keep the probe on the same area

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and press the NULL key.

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Slowly scan over the disbond

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in order to confirm detection.

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Set the RF DISPLAY to “IMPULSE”

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if you prefer to visualize
the signals this way.

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Press the RUN key
until your preferred display is shown.

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If your reference standard
has more than one disbond,

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scan all defects and optimize

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the XY gains and angle as needed.

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Finally, press the FULL key.

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The readings show the live amplitude

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and phase of the flying dot position,

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which can be used as an aid

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to identify near side
from far side defects.

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Basic Pitch-Catch
SWEPT Setup

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The Pitch-catch Swept method

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is great to detect disbonds in
tapered honeycomb composites

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or in aluminum core composites.

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Press the ADV SETUP key

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and then APPLICATION SELECTION.

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Select the “Skin to core
(tapered)” application.

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If desired, change the START FREQUENCY

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and the STOP FREQUENCY as recommended

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by the part manufacturer
or the procedure.

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Put the probe on a defect-free

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area of the reference standard,

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and press the GAIN key.

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Adjust the gain to
maintain the signals

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within the alarm box.

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Ideally, adjust the signal
to 2 divisions.

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Scan the disbond,
and validate the detection.

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Adjust the SWEPT RATE as needed.

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A lower swept rate will provide
better quality signals,

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while a faster swept rate
will allow faster scanning.

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Advanced Pitch-Catch
RF Setup

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On some more difficult applications,

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such as with thicker
skins or assemblies,

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the basic settings of pitch-catch RF

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or IMPULSE may not be satisfactory.

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There is a simple approach

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to quickly obtain the best signals

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for more difficult applications.

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First, perform a basic
pitch-catch RF setup

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as explained previously in this video.

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If you believe you have finished,

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but the signals do not
look satisfactory,

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follow these steps.

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Make sure to display the RF signal

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as “RF” and not “IMPULSE”.

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The RF display is preferred

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as each signal oscillation
can be seen.

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Put the probe on a defect-free area

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and maintain it.

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Set the WIDTH in order to visualize

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only one signal reflection.

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Typically, only the first
sound reflection

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has true interest and
subsequent reflections

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show less stability and repeatability.

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Adjust the gain as needed.

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Press the NULL key while keeping

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the probe on a defect-free area.

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Press and hold the SAVE key

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until a short beep is heard.

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The signal will be displayed
in the background.

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This is the reference signal.

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Move the probe over the defect

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and hold it there.

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Using the knob, adjust the GATE.

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Locate the position where

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the disbond signal amplitude differs

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the most from the reference signal.

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This is normally at the signal peak,

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but the best results can
sometimes be obtained

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before or after the signal peak.

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Scan the reference standard,

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and ensure that the disbond
is reliably detected.

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Optimize the XY view as needed.

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We hope you enjoyed
this instructional video

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on how to configure the BONDMASTER 600

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for pitch-catch mode on
honeycomb composites.

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For more information on
Olympus bond testing solutions,

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contact your local representative

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or visit us online at
www.olympus-ims.com.