8017035/ZMO9/2017-06-08 • © SICK AG • Subject to change without notice.
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Functions
7.4.2
Image Brightness (Shutter Time and Gain)
Use shutter time and gain to adjust the camera screen brightness.
With “Auto adjust”, the shutter speed will be adjusted to the optimum value.
Shutter
Set the camera shutter time. Set this value in steps of 5 μs.
The longer the shutter time, the brighter the images that can be taken.
However, the images may be blurred for workpieces moving at high speeds.
Gain
Set the camera gain.
The larger the value, the higher the gain, which makes it possible to
perform measurements even with small amounts of reflected light.
If you increase the gain too much, there will be lots of noise, which may
lead to unstable measurements.
Auto adjust
Optimize capturing condition automatically that matches with currently set
work piece.
Set the work piece to measure at the adequate position and execute “Auto
adjust”.
Don’t move the work piece while “Auto adjust” is proceeded.
When external trigger is used, check the profile is captured as you expected
for around 20 to 50 times, depends on the condition, to make sure.
Tips: •
"Hi-res" and "NR-Mode", “Gain”, “shutter time”, “Threshold” and “Reject
Level” will be adjusted automatically by pressing “Auto adjust” button.”
• When you do not use automatic adjustment, set the shutter speed and
the gain, and then adjust these settings so that the appropriate received
light waveform is generated. If the amount of light is insufficient
(the center waveform) or is too large (the lower-right waveform), it will be
difficult to perform accurate measurements. Adjust the shutter speed
and the gain until the received light waveform becomes like the one
shown below in the lower-left.
Appropriate shutter speed
Insufficient amount of light
Too large amount of light
→
Make the shutter time longer.
→
Make the shutter time shorter.
