Transcript
OmniScan MX2 Training Program Encoded Inspection Preparation
MX2 Training Program – Encoded Inspection - Overview
Encoders and scanners come in all shapes s hapes and sizes and are typically purchased based on the application requirements for geometry, precision, precision, durability and speed.
Encoders and scanners allow the position and orientation of the probe in one or two axis to be recorded with the MX phased array data allowing ! data "iews such as a #$scan and %$scan.
Encoded scanners can be as simple s imple as a small wheel connected to the probe or a complex multi probe scanner with multi axis capability controlled from a computer or P&%.
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MX2 Training Program – Encoded Inspection – Overview cont.
' full range of application and mar(et specific encoders, scanners can be found in the )lympus Industrial *canners and 'ccessories %atalog.
'dditionally, the encoder connector specifications are a"ailable in the users manual allowing the MX to be integrated with any scanner to a patch cable using a standard + pin serial connector.
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MX2 Training Program – Encoded Inspection – Overview cont.
-he encoder input receptacle of the MX is on the top panel and uses a short IP water resistant patch cable /Included with MX0 to interface with a standard + pin serial connector common to )lympus and many third party suppliers of encoders and scanners.
-he complete connector specifications and wiring pin$out can be found in section +1. of the MX 2ser manual.
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MX2 Training Program – Encoded Inspection – Scan Menu Overview
-he scan menu is where encoders, scanners and their associated parameters are configured for the inspection.
-hese parameters are typically configured last after the group has been created with the wizards, the 2- settings ha"e been configured, and all required calibrations completed.
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MX2 Training Program – Scan Menu – Inspection Type Overview
)ptions for scan type are3 4 )ne line scan. /MX !efault0 '"ailable on either with either a cloc( or encoded inspection and is used when the probe is mo"ed in one axis /*can axis0 along the component or weld. 4 5aster scan. -he probe is mo"ed in two axis /*can and index axis0 and acquired in a bi$directional or unidirectional pattern. 4 6elicoidal scan. /Pictured below0 -he probe is mo"ed in one axis as a cylindrical shaped component is mo"ed. -he scan axis encoder monitors the continuous rotation around the cylinder and the index axis encoder monitors the continuous mo"ement along the index axis.
Encoder input
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s i x a n a c *
MX2 Training Program – Scan Menu – Inspection Type One Line Scan
-he one line scan can be used with either a time or encoder inspection. 'lthough a one line scan only requires a single encoder, it could ha"e been wired in the interface cable for either encoder + or . * c a n a x is
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More examples of )lympus one line scanners.
6*M- 7lex /+ axis0
6*M- X89 /+ axis0
%hain *canner / axis0
:eld5);E5 /+ axis0
6*M- %ompact /+ axis0
%obra /+ axis0
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MX2 Training Program – Scan Menu – Inspection Type aster Scan
In a raster scan either encoder + or can be assigned to monitor the scan axis.
-he MX has two encoder inputs. :hiche"er encoder is selected as the scan axis, the other encoder is assumed to be the index axis.
In the example below, encoder + is assigned to the scan axis /:heels0 and encoder assigned to the index /'rm0.
! i s Ind e ! a r 2 Encode E S n c c a o n d a e ! r i " s
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MX2 Training Program – Scan Menu – Insp. Type - aster Scan cont.
In the raster scan pictured below, the scan axis is assigned to encoder + /:heel0 and the index axis is assigned to encoder /%lic(er0
-he probe is mo"ed along the scan axis, then the operator repositions the probe for the next <*tro(e= and presets the %$ scan on the index axis by selecting the clic(er button.
-his creates a bi$directional inspection /%$scan0 where the operator must manually control the index axis.
Inde! a!is stro#e 2
Inde! a!is stro#e " S c a n a ! is
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MX2 Training Program – Scan Menu – Inspection Type $e%icoida%
In the helicoidal scan pictured below the probe is mo"ed in one line as the cylindrical shaped component is rotated. -he scan axis encoder monitors the continuous rotation around the cylinder and the index axis encoder monitors probe mo"ement.
It is an inspection type that requires both encoders to be configured. /*can>encoder +, index>encoder 0
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MX2 Training Program – Scan Menu – Encoder Parameters Overview
-he encoder sub menu only appears when *can?Inspection?*can? is set to encoder + or encoder . It does not appear when set to time for one$line scans.
-he encoder sub menu is where the encoder hardware parameters are entered and the position is preset.
%onfigurations are a"ailable for both encoder + and if a raster scan is selected in *can?Inspection?-ype?5aster.
:hen *can?Inspection?-ype is set to one line scan, only the encoder selected for the scan axis a"ailable for configuration.
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MX2 Training Program – Scan Menu – Encoder Parameters - Po%arity
-he encoder polarity re"erses the encoder counts so that the scan axis can be configured in the desired direction.
:hen manipulating the scanner, the scan axis position is "isible in the MX indication area of the display and the operator can re"erse the position to match the scan axis direction on the component.
m m m ' m ' ' ' ' ' ' " " e ' s % r a e v m e r o &
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MX2 Training Program – Scan Menu – Encoder Parameters - Type
-he encoder type is a fixed parameter that describes the type of signal generated by the hardware for processing.
-he ma@ority of encoders used in weld inspection are quadrature. -he definition of each a"ailable type below can found in the MX user manual.
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MX2 Training Program – Scan Menu – Encoder Parameters - eso%ution
-he encoder resolution sets the number of counts per unit for the selected encoder and is expressed in steps>distance or steps per rotation. -his is a function of the hardware and will not change except for wear on the gears, axels, rubber wheels, etc.
-he MX encoder calibration wizard can found in :izard?%alibration?-ype Encoder.
-he distance represented by one step defines the minimum inspection resolution and theoretical limit of the encoderAs length sizing accuracy.
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MX2 Training Program – Scan Menu – Encoder Origin(Preset
-he encoder origin position is used to set the encoder position when preset is selected or if configured on the start acquisition button.
-he preset is typically zero but can be preset for recording a series of different acquisitions. /8$+88mm, +88$88mm, 88$988mm, etc.0
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MX2 Training Program – Scan Menu – )rea – One Line Scan
-he area sub menu is used to define the area of the inspection and resolution of the inspection.
-he scan axis is "isible on the %$scan and #$scan data "iews and the scan start and scan stop below will define the blue.
-hese parameters are directly related to file size and an if an area is entered that would create a data file larger than the 988 megabyte maximum, the software will automatically reduce the area to within limits.
'mm
22'mm
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MX2 Training Program – Scan Menu – )rea – aster Scan
:hen a raster scan is selected both the scan and index parameters are a"ailable.
*'mm
'mm 'mm
2''mm
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MX2 Training Program – Scan Menu – )rea - Scan eso%ution
-he scan resolution defines the inter"al on the scan axis that all focal laws or '$scans on all groups are recorded.
-he index resolution is only a"ailable when a raster or helicoidal scan / axis0 inspection is selected.
-he resolution is directly related to file size, scan speed, and sizing accuracy.
-he smallest number that can be entered in the scan axis is the equi"alent distance of + step of the encoder and would result in the most accurate length sizing accuracy possible.
' scan resolution of +mm would equal a sizing accuracy of B>$ mm. /+mm on each side of the %$scan or #$scan0 -he index resolution is a function of the pitch of the probe and is explained in detail in position %$scan section and typically only used in corrosion mapping and composite inspections.
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MX2 Training Program – Scan Menu – +ata
-he data storage parameters are only a"ailable for inspections using an encoder. /*can?Inspection?*can?Encoder+ or 0
-he MX encoded data can be recorded in both directions on the scan axis. :hen the scan is mo"ed o"er a data point by changing directions the data sa"ed is based on the selections below3 4 &ast. *a"es the latest data. -his is the MX default and most commonly used. )nly the most recent and current data is sa"ed with no comparison. 4 'C. -he data of maximum amplitude in gate ' is sa"ed. 4 Max -hic(ness. -he data of maximum thic(ness is sa"ed. 4 Min -hic(ness. -he data of minimum thic(ness is sa"ed.
-he need to bac( up the scanner to re$ acquire a data point occurs frequently with semi$automated manual push scanners due to missed data points from excessi"e speed, lac( of coupling, "erification of repeatability, aperture or probe o"erlap, mechanical problems, etc. 20
MX2 Training Program – Scan Menu – Start Mode
-he start sub menu contains parameters for starting and stopping the inspection.
-he start mode selected below determines what action happens with either the start button on the MX is pressed or the start button in the software is pressed. /*can?*tart?*tart Mode0 4 5eset 'll. MX default and most commonly used. 5esets all encoders to origin and clears all %$scan data. 4 5eset Encoder. 5esets all encoders to origin and retains %$scan data. 4 5eset !ata. %lears all the %$scan data and retains the encoder position.
-he pause button controls the acquisition by toggling between acquisition and analysis modes.
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