Alejandro Carlon Zurita TEMSCMDT Jose Ferradas Troitino TEMSCMDT Michela Semeraro TEMSCLMF 92722012018 MQXFS Measurements review MQXF Measurement review Outline Metrology report ID: 720759
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Salvador Ferradas Troitino (TE-MSC-MDT)
Alejandro Carlon Zurita (TE-MSC-MDT)Jose Ferradas Troitino (TE-MSC-MDT)Michela Semeraro (TE-MSC-LMF)
927-22/01/2018
MQXFS Measurements reviewSlide2
MQXF Measurement review
OutlineMetrology report2
Measurements of short model-coils
1.1 Equipment at 927
1.2 Procedure: Data acquisition and analysis
1.3 Results explained
Annexes:
Production plot
Backup slides
Comparison of the results obtained using the horizontal and the vertical supportSlide3
Lab 927 CERN Equipment
DeviceMetrology report3
CMM
Portable device: Faro Arm Edge 2.7
3 mm. Touch
Probe
Faro Arm Edge 2.7 volumetric maximum deviation:
41
μ
m
Faro Arm Edge 2.7 repeatability:
29
μ
mPolyworks Inspection Software 2017 IR6.1 (as of Jan’18)
Dedicated area for metrology inside the workshopMarble for measurements (2.5 m x 1.5 m)Arm fixed to the table using rigid supportThe CMM is sent to maintenance and is calibrated once a yearSlide4
Lab 927 CERN EquipmentMarble & Support
Metrology report4
MQXFS coils clamped using a specially designed support
Centre of the cylinders are placed
at
160.6 mm
height
Good agreement in ease to be able to measure different features (incl. inner)
Parts of the support are
aligned and
screwed to the marble
before
operations
The flexural rigidity is higher in this positionThis support was validated against measurements performed using the old support1Measurements using the horizontal support and the arm were compared against CMM
Prismo Ultra, showing good agreement.21 LARP 7 Comparison between new & old support. Alejandro Carlon2 Mechanical measurements review. Jose Ferradas et alSlide5
Metrology report
5
Procedure: MeasurementsSlide6
Metrology report
6
Procedure: Measurements
Distance between supports :
1200 mm
Distance between lead end and support :
180 mm
Coil clamping
Rubber padsSlide7
Procedure: Measurements
Data acquisitionMetrology report7
Compensation
The
process by which a measurement device is optimized to perform accurate measurements. This may be done through mechanical adjustments, as well as software corrections. Although the
FaroArm
is factory compensated, you have the ability to change probes and individually compensate each probe after mounting to the
FaroArm
. This process determines the
centre
of the probe tip relative to the arm coordinate system
.
Calibration The process by which one proves that a device is performing within factory specification. After calibration, a certificate is issued to authenticate the process, thus the use of the term certification.Cross section probinghttps://knowledge.faro.com/Hardware/FaroArm_and_ScanArm/Gage/Compensation_and_Calibration_Standards_for_the_FaroArm_and_GageSlide8
Metrology report
8
Procedure: Measurements
Post-processing (
Polyworks
) (1/6)Slide9
Metrology report
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Procedure: Measurements
Post-processing (2/6)
Coil azimuthal size and asymmetry
Coil length
Coil width
Outer diameter of each cross section
Inner diameter of each cross section
ResultsSlide10
Deviation vectors left
Deviation vectors right
Metrology report
10
Procedure: Measurements
Post-processing (3/6)
Coil azimuthal size and asymmetry
Only results from cross sections along the keyway are used because these values depend on the alignment
Sample results:Slide11
Metrology report
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Procedure: Measurements
Post-processing (4/6)
Coil
length
The point cloud used is the one corresponding
to the general geometry.
Ref.Slide12
Metrology report
12
Procedure: Measurements
Post-processing (5/6)
Coil
width
The individually aligned cross sections are duplicated and then trimmed. Only the points belonging to the ID remain.
Only results from cross sections along the keyway are used because the result depends on the alignment
Name
Dev
Δ T3
-0.177
Δ T4
-0.100
Δ T5
-0.120
Δ T6
-0.058
Δ T7
-0.097
Δ T8
-0.101
Δ T9
-0.135
Sample results:Slide13
Metrology report
13
Procedure: Measurements
Post-processing (6/6)
Outer diameter and Inner diameter
Circumferences are best-fitted to the points belonging to the inner and outer diameter (wo outliers). The algorithm makes minimum the square of the deviation of the points belonging to the arc. Then the center and the radius are computed.
The radius does not depend on the alignment. The center does.
Name
Nominal
Measured
Dev
ID 1
74.750
74.664
-0.086
ID 2
74.750
74.737
-0.013
ID 3
74.750
74.811
0.061
ID 4
74.750
74.884
0.134
ID 5
74.750
74.755
0.005
ID 6
74.750
74.863
0.113
ID 7
74.750
74.759
0.009
ID 8
74.750
74.780
0.030
ID 9
74.750
74.725
-0.025
ID 10
74.750
74.683
-0.067
ID 11
74.750
74.525
-0.225
RADIUS
Sample results:Slide14
Metrology report
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MQXF MEASUREMENTS REVIEW
Annexe
1:
Production plotSlide15
Metrology report
15Slide16
Metrology report
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MQXF MEASUREMENTS REVIEW
Annexe
2:
Backup slidesSlide17
Metrology report
17
Procedure: Measurements
Reference systemSlide18
Metrology report
18
Procedure: Measurements
Device compensation
Performed following FARO hardware calibration procedures:
Hole
compensation methodSlide19
Metrology report
19
Procedure: Measurements
Device validationSlide20
Metrology report
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Procedure: Measurements
Pre-alignment
Starting point: Pre-alignment of real coil to CAD model
Using 6 “Surface point alignment”
6 points are defined in the CAD model, operator must probe the same 6 points in real coil
For improving reproducibility, singular points are chosen (Corners, edges…)Slide21
Metrology report
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Procedure: Measurements
Best fit alignment
After first part of the probing process, information is enough to perform a better alignment
Best-fit alignment of real point cloud to CAD model is performed using:
Lead
end plane
Outer
cylinder
Left
key plane
Right
key plane
All degrees of freedom are fixedCoil is aligned to Lead end in order to define the cross section distancesSlide22
Metrology report
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Procedure: Measurements
Cross section alignment (1/2)
Example of cross section alignmentSlide23
Metrology report
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Procedure: Measurements
Cross section alignment (2/2)
Example of cross section alignment
Original CS
Banana shape present
CS aligned using special CAD
Resulting CS
Aligned points compared with full CADSlide24
Metrology report
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MQXF MEASUREMENTS REVIEW
Annexe
3:
Comparison between new & old support for MQXFS short coilsSlide25
Metrology report
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Comparison between new & old support for MQXFS short coils
June 2017. Alejandro Carlon, Jose FerradasSlide26
Thanks for your attention,
Metrology report26