3D Scanner - RangeVision Tutorial

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Introduction Prepare your RangeVision Spectrum (calibration) Start Scanning The 3 Scanning Modes References


Introduction


Rania Zarandah| Fab Engineer 06| 20 | 2018

Q5_3D SCANNING | Q5_1| RangeVision Spectrum 3D Scanner| SPECTRUM DESIGN SOFTWARES (LICENCES) : https://rangevision.com/en/products/software/ PLATFORMS: FAB FOUNDATION REFERENCES: PENDING

MACHINE DESCRIPTION RangeVision Spectrum is a new high resolution 3D scanner based on the safe-to-use structured light technology. It is designed for scanning small, medium, and larger objects. The 3D scanner has three fields of view and is equipped with 3.1 Mpix industrial color cameras. RangeVision Spectrum captures complex geometry, flat and long objects, as well as small details with constantly high 3D resolution while keeping the accuracy up to 0.04 mm. It has many advantages including: 1. 3-in-one scanner: Three scanning zones to capture different-sized objects from 1cm up to 3m. RangeVision Spectrum is a multi-purpose device capable of scanning objects of different sizes simply by changing the scanner’s field of view. No need to look for the options or another 3D scanner- Spectrum is 3 scanners in one. This device provides highly detailed scans of any type of objects, from jewelry to large automobiles, with accuracy up to 0.04 mm and 3D resolution up to 0.072 mm. It is perfect solution for companies that specialize in 3D scanning services, reverse engineering, product design or productions of all kind of small or medium-sized objects. 2. 3.1 Mpix industrial cameras. For highly detailed and full-colour scans. Industrial colour cameras with 3.1 Mpix sensors can capture the finest details and curved surface of the object-up to 0.07 mm. 3. Three scan modes. To render complex geometry of objects of any size and shape. There are two cameras to capture the geometry of the object, while making a scanning process more accurate and stable, reducing the need to calibrate the scanner during operations to a minimum. Spectrum is an ideal device for creating accurate visualization of objects with complex shape. Moreover, thanks to the possibility to scan with targets and adjustable fields of view the size of the scanned objects is limited only by your imagination and the power of your PC.

INTRODUCTION TO: RangeVision ScanCenter RangVision ScanCenter software is designed to conduct 3D scanning and post-processing of the obtained data. The easy Setup Wizard of the software allows to calibrate 3D scanner with ease even if the user don’t have any experience of using 3D technology. The software gives the ability to use three modes of digitizing: on the rotary table, with markers and free mode. RangeVision ScanCenter allows to capture colorful texture with automatic white balance. It is important if the user intends to use the data for colorful 3D printing or computer graphics, animation and presentations. The software gives you a perfect opportunity of choice of camera resolutions. The user can choose between scanning speed and details. Changing the resolution is particularly relevant when scanning large and smooth surfaces, for example the body of the car. Most importantly, the software provides support of photogrammetry which is the import of reference networks. It makes possible to accurately and quickly scan areas of the object located far apart from each other without collecting all the surfaces between them.

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Rania Zarandah| Fab Engineer 06| 20 | 2018

Main Features

Camera Resolution

Field of View in mm

3D point accuracy in mm

3.1 Mpix

520×390×390 280×210×210 133×100×100

0.12 0.06 0.04

3D resolution in mm

Align modes

0.26 0.17 0.072

By markers, by geometry, on the automatic turntable

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Prepare your RangeVision Spectrum (Calibration)


Rania Zarandah| Fab Engineer 06| 20 | 2018

The ďŹ rst step you need to do before starting the 3D scanning procedure is to make sure that your scanner is calibrated. To do so you should open the RangeVision Spectrum software which is the RangeVision ScanCenter. Make sure that the USB that comes with RangeVision Spectrum package is connected to your PC for the software to work.

Also you should power on your scanner, make sure that the camera and the datashow are connected to your PC as shown in the above picture.

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Rania Zarandah| Fab Engineer 06| 20 | 2018

When you first open the RangeVision ScanCenter the following panel will appear with the following choices; Create project, open project, configuration wizard, and go to ScanManger.

After choosing configuration wizard the software will ask you to select the scanning area which is the most suitable for your scanning area.

For the selected scan area use the calibration field 2 box (approximation size 237 mm). The exact of your field is written on the reserve side. Enter the size of the calibration field, or selected from the list.

Go to configuration wizard to calibrate your RangeVision Spectrum scanner.

The program will give three different ranges of size. (0.4-1m), (0.15-0.5m), and (0.05-0.15m). For our case let us go with (0.15-0.5m) choice.

The RangeVision Spectrum came with three calibrations boards with different sizes. These are the boards used for the calibration process.

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Rania Zarandah| Fab Engineer 06| 20 | 2018

After this you should sit the calibration field in front of the scanner, using the holder. Approximate the distance between the scanner and the field should be almost 50 cm.

You can measure the distance between the scanner and the field using an analog meter tape.

After that you need to check the brightness of the image. If the camera image is very dark or too bright, loosen the fixing screw without removing them on the lense diaphragm ring to get acceptable image.

The above picture is illustrating the place of the camera’s lense diaphragm.

Then you need to make sure whether the cameras are correctly arranged and that the images are flipped. You can use the buttons place in the below side of the massage in case of disarrangement.

Then by varying the distance between the camera and calibration field, set the field in a position where the blue lines will cross the central and lateral rows of the markers on ONE camera only.

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Rania Zarandah| Fab Engineer 06| 20 | 2018

You can do this by moving the scanner stand to the front or to the back to adjust the alignment correctly.

After that, the software will ask you to adjust the projector focus until the lines on the calibration field become the most sharp.

You can do this by playing on the sliding key indicated on the above picture which controls the focus of the projector.

Then loosen the camera screws and consecutively move the cameras so that the projected line matches the blue line on the image. After that, securely fix the cameras with the screws.

There is a kit that comes with RangeVision Spectrum that has screw fixer tool which can be use to loosen or tighten the cameras screws.

You can use them to tighten or loosen the screws as shown in the above picture.

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Rania Zarandah| Fab Engineer 06| 20 | 2018

Then, place the calibration field in front of the scanner in such way that the projected cross hits the center marker and matches the blue lines on the cameras image.

After that, loosen but without remove the fixing screw on the lens focus ring. Adjust the sharpness. It it convenient to zoom in by the left clicking on the image. Don’t forget to re-tighten the screws!

Then, close the lens diaphragm so that the image lines and stripes are as bright as possible, but without any significant overexposure. The brightness of the images of both cameras must be the same

Finally, to complete scanner setup, perform calibration by taking several shots of calibration field in different positions. After last shot the calibration value will be displayed.

Before calibration check that all adjustment and tightening screws are tightened. It’s not allowed to change cameras positions or lense setting after calibration.

You can also go to Settings - Calibration to finalize the last step.

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Rania Zarandah| Fab Engineer 06| 20 | 2018

To finalize the calibration process, the software will ask you to place the calibration field in 11 different positions like; 50 cm away from the scanner.

Place the calibration field further from the scanner.

Rotate the calibration field: left side near to scanner.

And finally your Calibration process will be done and you are ready to start the Scanning process.

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Start Scanning


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The 3 Scanning Modes


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References


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