User manual

FastSCAN 13
3.3 Scanning With the Wand
The Transmitter is Reference option is the default setting for a typical
scanning situation (a small–medium size stationary object; the Tx icon
selected) and normally this button should always be selected.
To scan unstable or large objects you may need to use the Receiver as
Reference (Rx icon)—see Section 3.5.
3.3.1 Scanning Technique
To scan a complete object you will need to perform a number of sweeps with the
Wand. Keep the Wand approximately 10-15 cm away from the subject. Due to the
Wand’s field of view objects too close (less than 8 cm) or too far away (greater than
22 cm) (for the standard Cobra
TM
) will be outside the range of the camera.
Scans are built up from a number of overlapping sweeps, in a manner analogous to
spray-painting. A smooth consistent action is required for best results.
To collect a single sweep of data from an object:
1. Prepare the equipment for scanning as outlined in Section 2.5: Running
FastSCAN
TM
.
2. Depress the Wand’s trigger into the Preview position, and ensure you can view
the laser profile/sweep start-point on-screen in the FastSCAN
TM
viewing win-
dow.
3. Press the trigger to the Scan position. The Scan LED on the control panel will
illuminate to indicate that scanned data is being collected, and the scanned data
will appear on-screen simultaneously.
4. Move the Wand across the surface of the object in a smooth motion.
5. Release the trigger at the end of the sweep.
As you perform the scan data appears in the viewing window on screen. This lets
you see any areas that may have been missed or that might need going over again, to
enable an accurate complete scan of the whole object.
Pointing the Wand at the region of the object you wish to scan, pressing the trigger
to the Preview position and releasing it will reorient the on-screen object to enable
viewing of that region.