Faro Edge - Page 81

FARO Edge
September 2012
67
Chapter 4: Probes
• Scan Rate - choose the number of scan lines per second. 1/1 is the normal rate
of scan lines per second, set this to discard scan lines.
N
OTE: Always set the scan rate to 1/1 when calibrating the FARO Laser Line
Probe.
• Scan Density - choose the number of points on each scan line. 1/1 is all of the
points on the laser line, set this to discard points on each line.
• Information - displays the unique information for the current FARO Laser Line
Probe.
Basic Settings
• From the M
ATERIAL drop-down window choose any existing material setting.
Use the commands in this drop-down window to save material settings.
N
OTE: The current material setting is stored on your computer and in the Edge.
If you connect the Edge to another computer, the current material will be
Unknown. Save the material settings to copy the settings from the Edge to the
new computer.
• Click the AUTO button to set the Exposure and Noise Threshold levels for the
current material. Hold the FARO Laser Line Probe in position, pointing at the
surface, until the process completes. You can also set the values manually:
• Exposure - How long the “shutter” is open and the sensor is exposed to light
in the camera. Enter a number from 1 to 80; the corresponding value in
milliseconds appears next to it. Light colors and reflective surfaces are better
captured with low exposure levels. Darker colors typically require higher
exposure levels. The default value is 16.
• Noise Threshold - The FARO Laser Line Probe measures the intensity, or
return power, of all pixels and each pixel of the laser line projected onto a
surface using a scale from 0 to 255. All data having intensity below the
Noise Threshold value is considered noise or “chatter” that is too faint to be
usable and is simply ignored. Dark colors or surfaces that tend to absorb
light may benefit from a lower value. Increasing this value will filter out
more data. Setting this value to 255 considers all data to be noise. The
default value is 15.
Advanced Settings
• Select the A
DVANCED SETTINGS check box to modify more material settings:
• Width Threshold - When determining the Center of Gravity (COG) for the
laser line, groups of pixels are analyzed. This sets the minimum number of
pixels to define a COG group of pixels. The default value is 5. This means
that if the FARO Laser Line Probe picks up several clusters of light in one
08M52E00_FaroArm_Edge.book Page 67 Thursday, October 4, 2012 9:31 AM