50
FastSCAN
11
Troubleshooting/FAQs
Q.
The status bar of the
FastSCAN
TM
program continues to show ‘Scanner off-line’—
what has gone wrong?
A.
Run through the following checklist:
•
Ensure you do not have another
FastSCAN
TM
program still running from an
earlier session (possibly minimized).
•
Ensure that power is getting to the PU. The green ‘Power’ light on the front
panel should be on.
•
Ensure that power is getting to the Wand. The green ‘Power’ light on the
Wand should be on.
•
Check connections of all the cables.
Q.
I have just performed a scan and there is nothing on the screen. Why?
A.
Possibly the scanned surface is out of view. Try centering the scan—select
Center
from the
View/Viewpoint
menu (or point the Wand at the area you wish to
view and pull the trigger to the Preview position). If you are new to scanning,
check that you are holding the trigger in the Scanning position when scanning
so the Scan LED on the Wand is illuminated.
If the object still does not appear then you may be holding the Wand too close
or too far away from the object while scanning, preventing the camera from
recording the movement of the laser. Keep the Wand about 10-15 cm from the
object when scanning.
Q.
My scanned image is upside-down on the screen and I can’t get it the right way
up. How can I fix this?
A.
The
hemisphere of operation
is not defined correctly. Switch off the PU and
switch it on again. Then go through the procedure in Section 2.5: Running
FastSCAN
TM
.
Q.
I have “floating” fragments of surfaces in my scan that are unrelated to the object—
what’s happening?
A.
The Wand’s camera may occasionally view a bright, broad spectrum light source
(e.g., sunlight from a window) that mimics the light of the laser. It is advisable
to keep windows shuttered, avoid bright lights above and behind the scanning
area, and to set the sensitivity control as low as possible. To check whether
extraneous light is being detected, select
View/Camera
(which displays what
the camera is seeing), and cover the laser. Anything visible in the display is
then due to extraneous light.
Q.
How close do I need to keep the components of the
FastSCAN
TM
system?
A.
To ensure both high resolution and high accuracy, keep the Wand close to the