DAVID SLS-2 User manual
QUICK GUIDE
Contents
1. Introduction
1.1. Intended Purpose
1.2. Safety Instructions
1.3. Scope of Delivery
1.4. System Requirements
2. Initial Setup
2.1. Position of the Camera
2.2. Rotation of the Camera
2.3. Connection
2.4. Installing the Camera Driver
2.5. Setting up the Projector
2.6. Setting up the Projector as Extended Desktop in Windows
3. The Scan Software DAVID
3.1. Software Updates
4. Setup and Calibration of the Scanner
4.1. Menu ”Hardware Configuration“
4.2. Menu ”Calibration“
5. 3D Scanning
5.1. Menu ”Structured Light“
5.2. Menu ”Texturing“
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6. Alignment and Fusion of Multiple Scans
6.1. Menu ”Shape Fusion“
6.2. Alignment of Multiple Scans
6.3. Fusion of Multiple Scans
7. Disposal / Recycling
8. Troubleshooting
8.1. Problems with the Scan Quality
8.2. Problems with Alignment / Fusion
8.3. Other Problems and Solutions
9. Terms of warranty
10. Copyright
11. CE Declaration of Conformity
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1. Introduction
Thank you for choosing a DAVID product! In order to setup and run your 3D scanner safely, please read
the following safety instructions. This manual is part of this product. In case of passing this product,
please enclose this guide.
1.1. Intended Purpose
With your DAVID SLS-2 Structured-Light Scanner, you can quickly and accurately capture object surfaces three-dimensionally.
1.2. Safety Instructions
Place the appliance on a stable surface. Dropping the unit may
severely damage it, and the glass calibration panels may break.
Caution: Risk of cuts!
Do not place the device on a vibrating surface to prevent damage
of internal components and battery leakage.
Operate the device only in a dry environment.
Do not operate the device in potentially explosive atmospheres.
Never look directly into the projector lens when the lamp is turned on.
The bright light may cause serious damage to eyes.
Do not face the projector lens to the sun. It can result in fire.
Do not attempt to disassemble this projector. There are dangerous high voltages inside the unit.
Do not use the device if it is broken or has been dropped. In this case, contact your dealer
for inspection.
Stop using the device when there is smoke, unusual noise or smell. That could result in fire or
electric shock. In this case immediately disconnect the power plug, and contact your dealer.
Do not insert any objects into the openings of the projector chassis. That way you might come
into contact with dangerous voltage points or create a short circuit between the parts.
That could result in fire or electric shock.
Do not spill liquid of any kind onto or into the device.
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The projector‘s power adapter is equipped with a three-wire grounded plug. The plug only fits
in a grounded power outlet. Make sure that the power outlet is properly grounded before
inserting the AC adapter plug. Do not insert the plug into a non-grounded socket. Please contact
your electrician for details.
Warnings! The grounding pin is a safety feature. Using a not properly grounded socket may
result in electric shock and/or injury.
Do not make any changes to any components.
Repairs to the device must be performed only by an authorized dealer or qualified service
personnel of DAVID Vision Systems GmbH.
Observe the safety instructions of the projector manufacturer. These can be found separately
on the accompanying ACER projector CD.
1.3. Scope of Delivery
• Structured-Light Scanner pre-assembled, consisting of:
– LED video projector
– Camera with lens
– Base rail with camera slide
• Tripod with protective bag
• Glass calibration panels + 2 xing brackets 90°
• USB ash drive with DAVID-Laserscanner Pro Edition and camera drivers
• Projector Accessories
– External power supply and power cable
– Remote control
– Adapter VGA to Universal I/O
– VGA cable
– HDMI cable
– Protective bag
– User Instructions
• Adapter kit for power supply worldwide
Technical changes are subject
to change without prior notice.
• USB cable for camera
• Cable strap
1.4. System Requirements
• Windows XP, Vista, 7 or 8 (32-bit or 64-bit)
• Microsoft. NET Framework 4.0 (32-bit) or 4.5 (64-bit)
• 3D-capable graphics card
• Free VGA or HDMI port
• Two free USB ports
• Recommended: Dual-core processor, 2 GHz, Windows 7/8 64-bit, 8 GB RAM, NVIDIA
or AMD graphics card
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2. Initial Setup
2.1. Position of the Camera
The camera can be mounted on the right or left side of the projector:
Size of the scan object /
scan area
up to 110 mm
110 to 350 mm
from 350 mm
Position of the Camera
(seen from rear)
to the left of the projector
optional, better to the left
to the right of the projector
If necessary, mount the camera slide to the corresponding side. The exact position of the slide (distance
from the projector) is set later in operation. The distance between the camera and projector optics will
be similar to the size of the object/region to be scanned.
Figure 2.1: Left: Small object Z short distances; Right: Large object Z greater distances
2.2. Rotation of the Camera
Rotate the camera by about 22° such that
it aims at the projection area. (Fig. 2.2)
To do this, loosen the thumbscrew under
the camera. Set the rotation angle by
means of the degree scale on the camera
slide, then fix the thumbscrew.
Figure 2.2: Setting the camera angle
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TIP:
For very large objects, or objects with deep cavities, a smaller camera angle may be necessary.
Angles less than 20° result in reduced scan quality (noise, inaccuracies). A very large camera angle
(> 30°), may improve the scan quality a little, but is only suitable for very at objects. Large camera
angles are usually impractical and reduce the depth of the measurement range.
2.3. Connection
Connect the camera, the projector and the DAVID USB ash drive according to the wiring diagram to
your computer (Fig. 2.3). To connect the projector to your computer, you can use HDMI (recommended)
or VGA.
Figure 2.3: Connection diagram
2.4. Installing the Camera Driver
Even if Windows installs drivers automatically, please install the supplied drivers:
1 Connect the USB ash drive to your PC, then select ”Browse“ or Explorer / My Computer.
2 Start ”Install_DAVID-CAM-3 M_Driver“ (administrator rights required).
3 Follow the instructions on the screen.
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2.5. Setting up the Projector
The projector is already delivered with optimal settings, we recommend not to change anything in the menu.
Note: You can restore the recommended
settings in the projector‘s menu at any time
as follows (See Figure 2.4.)
1 Select ”Reset“
2 Turn the ”Auto Keystone ” off, and set the
manual value ”Manual Keystone“ to 0
3 As ”Projection Location“, select the icon
for desktop use, not ”AUTO“
Figure 2.4: Projector settings
Note: You can activate the ”Eco-Mode“ if you do not need the maximum intensity of light.
For details, please read the manual of the projector.
2.6. Setting up the Projector as Extended Desktop in Windows
Click the right mouse button on a blank area of your Windows desktop, select “Screen resolution“ or
”Properties“ (depending on your Windows version).
Figure 2.5: In this window you can separately configure your two ”Displays“, the monitor and the projector. (Image may vary)
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Your screen should be set as ”primary monitor“. Make sure the projector (usually ”Acer K132“) is set
as extended desktop (”Extend these displays“). This is necessary so that DAVID can project the stripe
patterns, while the user interface is displayed on your screen.
The resolution of the projector must be set to its native value (usually 1280 * 800 pixels) Furthermore,
you should make sure the projector is set to 60 Hz. Choose the Projector and click ”Advanced“, here you
should set the refresh rate to 60 Hz in the ”Monitor“ tab.
A more detailed description can be found in our online manual in the section ”Structured Light 3D
Scanning“ on
http://www.david-3d.com/manual
When these settings are correct, your monitor and projector will show the same desktop wallpaper,
but otherwise different contents. You can move your mouse pointer sideways between the monitor and
the projector image. The Windows Start menu and most of the desktop icons are only displayed on the
monitor. Any window can be moved between monitor and projector back and forth.
So in case the main DAVID window is displayed on the projector, please grab its title bar with the mouse
and drag it sideways onto the monitor.
3. The Scan Software DAVID
Start DAVID by running ”Start_DAVID3_x64“ from the USB ash drive. If you use a 32-bit system
(not recommended), run ”Start_DAVID3“. On the left side, the main menus are stacked, and can be
individually opened and collapsed. Each menu is responsible for one work step, which you will usually
go through from top to bottom. This printed manual refers to version 3.10 of the software and may
already be out of date. Please follow the detailed and always up-dated on-line instructions at
http://www.david-3d.com
3.1. Software Updates
Our software is constantly being developed and improved. All updates within version 3.x are free.
Therefore use the automatic update feature, or download updates manually from our website:
http://www.david-3d.com
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4. Setup and Calibration of the Scanner
An advantage of the modular design of the SLS-2 is that it can be adjusted to scan a wide range
of objects sizes. Therefore, a calibration (measurement of the scanner hardware in the software) is
necessary so that the software can then obtain precise and undistorted 3D data at the correct scale.
For this purpose, a 90° pair of glass calibration panels is used as a reference object, whose dimensions
are precisely known.
4.1. Menu ”Hardware Configuration“: Alignment and Setup of the Projector and Camera
1 Main setting: Select ”DAVID SLS-2“ as ”Setup Type“.
2 Screen ID: Here you can select on which display device
the stripe pattern is shown. Set the ”Screen ID“ so that the
pattern is projected from the projector.
3 Working distance: Place the scanner in front of the object
to be scanned and aim the projector so that it illuminates the
surface to be scanned - not less, but also not much more.
(See Figure 4.3)
4 Projector focus: Adjust the focus of the projector with the
focus lever, so that the stripes are perfectly focused on the
object surface.
5 Selection of camera: Under ”camera“, select your camera
(DAVID-CAM-3.1-M). The live image from the camera is
displayed. If necessary, set the mechanical aperture and focus
so that you get a picture.
6 Position of the camera: Move the camera slide by
loosening the thumbscrew so that the camera is aimed
on projected pattern on the object. Then fix the camera
slide. If the viewing range of the projector and/or camera contains much more than the surface to be
scanned, you should reduce the working distance of the scanner (step 3).
7 Exposure time: The Exposure should be set to the same value as the frame rate of the projector (usually
1/60s), otherwise the camera image will icker/pulsate when looking at the projection. In this case adjust
the exposure time.
8 Camera focus (See Figure 4.2): Adjust the aperture of the camera (dial A) so that you will get a rather
bright picture. Look at the camera image and watch the sharpness of the object and the sharpness of
the projected black and white stripes (cross). Adjust the focus of the camera (dial B) so that the object is
depicted as sharp as possible.
Figure 4.1: ”Hardware Setup“ menu
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