Measurement Report
for Harley Davidson Motor Company
Subject: Presentation of the principle of operation and
possibilities of SMARTTECH’s 3D scanners together
with Geomagic Control in order to provide complex
quality inspection.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
Firma nagrodzona:
Contents
1. Purpose of the measurement.............................................................................................................. 2
2. 3D scanning - obtaining the object’s geometry .................................................................................. 3
3. Work in SMARTTECH3Dmeasure ......................................................................................................... 5
4. Analysis in Geomagic Control .............................................................................................................. 7
Summary ............................................................................................................................................... 18
1. Purpose of the measurement
The purpose of the 3D scanning provided by SMARTTECH is to present the measurement
method and the potential of 3D scanners. The scanned objects were parts sent by Harley
Davidson. The obtained data was further processed in Geomagic Control in order to provide
quality control.
To provide inspection we require:
3D scanner, dedicated to the scanning of black surfaces, with high accuracy and
resolution,
specialized software for quality inspection.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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2. 3D scanning - obtaining the object’s geometry
In this case the motorcycle producer supplied us with black glossy elements. Measurement
was done in order to check the depth of engraved VIN numbers on a flat and cylindrical
surface.
Figure 2.1. Engraved VIN number that needed to be scanned and measured.
The producer stated that there's no possibility to cover the object with an agent that would
whiten the surface - titanium oxide. The SMARTTECH, in order to meet this requirement,
used a specialized 3D scanner with the ability to scan black surfaces – MICRON3D color
24MPix - and with the highest available resolution on the market - 24MPix.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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Figure 2.2. Scanner MICRON3D color 24MPix.
This specific model has a measurement volume of 200 x 150 x 120 mm and an accuracy of
0,03 mm. The very high resolution of this 3D scanner allows us to get 900 points on one
square millimeter. A single scan takes about 15 seconds.
In this case, in order to ensure the accuracy of the results, the objects were covered with an
anti-glare agent (which was necessary) but still retained the original black color.
The result of a single scan is a cloud of points (each point is described with X, Y, Z
coordinates).
Figure 2.1. The 3D scanning of the object.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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3. Work in SMARTTECH3Dmeasure
To control the 3D scanner we use software SMARTTECH3Dmeasure. This program allows
us to visualize results and enables us to do initial operations on the cloud of points.
Furthermore, the software is capable of working with very large datasets (even over 300 000
000 points). The measurement can be done using 3 different methods: a single scan, scanning
on a rotary stage, and with positioning markers. In SMARTTECH3Dmeasure we adjust the
appropriate parameters to the 3D scanning environment and scanned object. The software
allows us also to export the clouds of points to files with ply., obj., or vrlm. format which are
compatible with the most popular quality inspection and reverse engineering software
solutions (including Geomagic Control).
Figure 3.1. The result of the 3D scanning visible in SMARTTECH3Dmeasure. The VIN
number on the cylindrical surface.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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Figure 3.2. The result of the 3D scanning visible in SMARTTECH3Dmeasure. The VIN number on the
flat surface.
In this particular case we need only to make a single measurement for each object. The only
task to be done in software SMARTTECH3Dmeasure was initial cleaning from the noises that
could appear during the 3D scanning. We also cut out all irrelevant surfaces, leaving out only
the surface with the engraved number.
Figure 3.3 Engraved letters on the cylindrical surface.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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Figure 3.3 Engraved letters on the flat surface.
Once we have our data (the point clouds) prepared, we export them to the quality inspection
software.
4. Analysis in Geomagic Control
The advantages of the program are:
comprehensive verification,
simpler and more reliable control of parts,
import of data from a 3D scanner and CAD software,
automatic adjustment of the 3D scan to CAD model,
creation of a map of deviations, as well as control of dimensions and tolerances
(GD&T),
automatically generated reports will help with the presentation of inspection results,
repetition of the process for another part with only two clicks.
An overview of the most important functions of editing point clouds:
several types of selecting point clouds,
deletion of selected point clouds,
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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noise removal,
simplification/reduction of the size of point clouds,
point clouds smoothing,
creation of triangle mesh.
An overview of the most important functions for the mesh of triangles:
finding and fixing errors,
editing edges,
editing individual triangles,
smoothing,
filling holes,
simplifying triangle mesh,
reducing the number of triangles,
recalculation of triangle mesh,
flipping normals,
dividing triangle mesh into smaller parts,
dividing triangle mesh,
mirror.
First, we analyze the depth of the letters engraved on the flat surface.
First step – selection of a flat surface that will function as a reference. Below you can see an
example area from which the flat surface was selected.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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Figure 4.1. The area from which the reference surface was selected. The view in Geomagic Control
Once we selected the flat reference surface, we create a deviation color map.
Figure 4.2. Calculating the surface of the object.
In order to measure the depth of the groove we need to measure the deviations to the reference
surface. We measure the distance from the reference surface in the groove and on the edges.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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This approach will guarantee that the results are referential, since the surface on which the
letters were engraved wasn’t perfectly flat.
Figure 4.3. Measurement of the depth of the grooves.
It is also possible to select a reference surface locally for a given letter (optionally, for a set of
letters).
Figure 4.4. Selecting a reference surface.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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Figure 4.5. Deviation color map.
Figure 4.6. Measurement of the depth of the grooves.
We also analyzed the letters on the cylindrical surface. The scanned part is relatively small,
therefore we might acquire inaccurate data.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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Figure 4.7. Creating a cylinder from the scanned data.
The diameter of the cylinder is a few millimeters smaller than in reality and because of that
the deviation color map displays inaccurate results.
Figure 4.7. Deviation color map.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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If we measure the cylinder’s diameter manually, e.g. using a caliper, we can manually
generate a cylinder with required diameter. Just like presented below.
Figure 4.8. Aligning the cloud of point to the manually created CAD cylinder.
And perform the analysis of the depth of the grooves.
Figure 4.9. Deviation color map.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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Figure 4.10. Measurement of the depth of the groove.
Another solution is to do cross-sections on the scanned area and to create the surface using
lofts. Below you can see how to quickly do that in Geomagic Design X.
Figure 4.11. Creating a segment of the reference surface using cross-sections in Geomagic Design X.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
Firma nagrodzona:
The analysis performed on the surface created by using cross-sections.
Figure 4.12. Deviation color map.
Figure 4.13. The analysis of the depth of the grooves.
The same cross-sections can be performed in other CAD software, for example in
SolidWorks.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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For this purpose, we need to generate a set of cross-sections in Geomagic Control.
Figure 4.14. A set of cross-sections generated in Geomagic Control using only one function.
Figure 4.15. The curves generated in Geomagic Control.
Next, we need to export those cross-sections to a file in an IGES format and open it in a
program that supports files with this extension.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
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Figure 4.16. The curves opened in SolidWorks. The loft function.
Figure 4.17. Segment of a future parametric surface created based on the curves in Geomagic
Control.
SMARTTECH Sp. z o.o. tel./fax: (22) 751 19 16
Racławicka 30 NIP: 118-15-38-553
05-092 Łomianki [email protected]
Firma nagrodzona:
Summary
The 3D measurement was performed by SMARTTECH on motorcycle parts provided by
Harley Davidson. The parts were black and glossy with no possibility to cover them with anti-
glare white agent. For this reason SMARTTECH used a specialized 3D scanner MICRON3D
color 24 MPix with a detector with 24 MPix. This 3D scanning unit is capable of scanning
black color with very high accuracy and resolution. The parts were covered only with a
transparent - easily removable - matting agent.
The measurement results are very accurate and detailed which, together with Geomagic
Control, allows us to provide complex quality inspection. The entire process, starting from the
3D scanning and finishing with the groove analysis takes about 8 minutes.
Using a 3D scanner with appropriate software gives us possibilities and precision unreachable
for the traditional – manual – method.
During this measurement we used a 3D scanner with a measurement volume of 200 x 150 x
120 mm that assures the accuracy of 0.03 mm and 900 points on a single square millimeter.
The SMARTTECH 3D scanners do not require end-user calibration before starting the
measurement. Thanks to the sealed cover and a specialized ISA (Internal Shock Absorbing)
system, the scanner is ready to use directly out of the case.
The SMARTTECH 3D scanners can be certified in independent measurement laboratories
which makes them referential, just like CMM machines.