Adjusting the field of view for the ScanXpert FX is divided into two parts.
- During the optical setup, you adjust the mechanical and optical parameters of your scanner hardware.
- The calibration process calculates the environmental parameters of the setup.
optical setup:
As an example, we will set the scanner to a field of view of 250 x 200 mm.
This selected field of view is a good average for different scanning projects.
If you prefer a different field of view, change the parameters according to
Table 1 below.
Position the scan head at approximately the same height as the center of the calibration master.
Position the scan head 490 mm away from the calibration master.
If you are using a different viewing area than 250 x 200 mm, use the spacing specified in Table 1 (matching the viewing area you are using).
With a field of view of 250 x 200 mm, place the calibration plate at a distance of 490 mm in front of the lenses of the scan head.
For a different field of view, select the correct distance using Table 1.
field of view | distance | Master |
| 80 x 60 mm | 140 mm | 100 x 100 step 5,0 mm |
| 100 x 80 mm | 200 mm | 100 x 100 step 5,0 mm |
| 150 x 120 mm | 290 mm | 200 x 150 step 7,5 mm |
| 200 x 160 mm | 390 mm | 200 x 150 step 15 mm |
| 250 x 200 mm | 490 mm | 200 x 150 step 15 mm |
| 300 x 240 mm | 580 mm | 200 x 150 step 15 mm |
| 350 x 280 mm | 680 mm | 200 x 150 step 15 mm |
| 400 x 320 mm | 780 mm | 200 x 150 step 15 mm |
| 450 x 360 mm | 880 mm | 200 x 150 step 15 mm |
| 500 x 400 mm | 1040 mm | 200 x 150 step 15 mm |
Table 1: Working distance depending on the field of view (calibration pattern to be used from the calibration master template).
Start the ScanXpert Suite software.
On the ScanXpert Suite welcome screen, select the menu item “Options and Scanner Settings”
In the following menu, select the "Scanner Settings" button to start the optical setup wizard.
Once the Optical Setup Assistant is started, the scan head projector generates a vertical line.
Position the calibration target in front of the scanner so that the projected line passes through the center point of the bold markings. Please ensure that the distance between the calibration target and the scanner remains 490 mm (with a field of view of 250 x 200 mm).
There is a focus control on the top of the projector. Please adjust this until the projected line appears sharply defined on the calibration master.
The cameras are activated during the optical setup!
Pay attention to the screen content of the ScanXpert Suite.
Loosen the two screws that secure the left camera to the guide rail.
On the back of the guide rail is a scale that represents the selected field of view.
Move the camera to position 250 (or to the value for your desired field of view).
Pan the left camera towards the center of the calibration master shown on the left side of the computer screen.
The yellow line of the crosshair generated by the camera (consisting of blue, green and a yellow line) must be shown directly on the black line.
See the following illustration:
Repeat the process for the right camera:
To do this, first loosen the two screws that fix the right camera to the guide rail.
Pan the right camera towards the center of the calibration master shown on the right.
The yellow line of the crosshairs must be drawn directly on the black line.
Secure the position of the right camera by tightening the screws.
Ensure that the crosshairs remain directly on the black line of the grid shown on the right. (see Fig. 11)
Adjusting the lenses
Carefully loosen the knurled screws of the lens on the left camera.
Open the lens aperture fully by turning the aperture ring completely to the left. The camera view displayed on the screen will become brighter or may even shift into the red range.
Repeat this process for the right camera.
Enable the option: Show focus:
Secure the position of the right camera by tightening the screws.
Rotate the front lens ring for focus adjustment until the image from the left camera is sharply displayed on the screen.
repeat the process for the right camera.
Each marker displays a value for the detected focus setting.
In the upper left corner of each camera view, an average value for the set focus is calculated. Adjust the focus setting by turning the focus ring on the lens until you reach the maximum possible value.
The average value should be between 0.55 and 0.75.
The higher the value, the better the scanner's image sharpness, and therefore the better the scan results!
Lock the focus ring on both cameras.
It is best to hold the focus ring firmly with your hand to prevent your optimal settings from changing.
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