VI User Manual - 第38页
Maintenance mode 2 - 2 Vision 2007 4.10 User Manual Re v 01 2.1 Test machine When you click on Test machine button , the opposite screen appears with the calibration functions of the AOI system. 2.1.1 Gray levels Calibra…
Vision 2007 4.10 User Manual Rev 01 2 - 1
Chapter 2
Maintenance mode
The Maintenance mode is used to access the various machine parameters, checks and configurations.
At the end of this chapter, you will be able to:
Calibrate and check the machine.
Access the various machine parameters.
Control the various machine parts separately.
Control axes movement manually, etc.
Click Maintenance button to access the functions of the
Maintenance mode from the Vision System window.
The Maintenance mode functions window appears.
Do not change adjustments if you are not authorized to do so. This mode may be protected by a pass-
word (see chapter 1).
Maintenance mode
2 - 2 Vision 2007 4.10 User Manual Rev 01
2.1 Test machine
When you click on Test machine button, the opposite screen appears with the calibration functions of
the AOI system.
2.1.1 Gray levels
Calibration of the gray levels ensures the same degree of light intensity and performance of the
lighting head is obtained for every machine by selection of a reference gray level (120).
Consequently, any lighting combination on any machine placed on any production lines through-
out the world will provide the same lighting ranges.
The gray levels is cali-
brated using the gray
tool supplied with the
machine.
Two tool versions are
available.
The standard gray paper used to create the tool have a life time of 1 year, if it is kept
away from light and humidity.
Contact support to change the standard gray paper each year.
On completion of gray level calibration, the focus may have changed as a result of gray
level adjustment.
Maintenance mode
Vision 2007 4.10 User Manual Rev 01 2 - 3
2.1.1.1 Gray level calibration with Vi-800 gray tool
The calibration with gray tool measures the gray plate for each lighting to calibrate the
lighting power.
1. Click Gray levels button in TEST MACHINE window for automatic adjustment of con-
veyor width.
2. Insert the calibration tool in the machine.
3. Once the gray tool is inside the machine
and the camera is automatically placed
above, the Light adjustments window is
brought up. The AOI system then mea-
sures the gray level for each lighting type.
4.
Manually adjust the lens opening (top ring) of
the camera and click
Start test
to obtain the
new value of measurement for each lighting.
5.
Repeat this operation until the value of gray
level measured is equal (+/- 10) to the reference value (120) for the weakest lighting (Val-
ues out of range are underlined in red). Then the
Auto Calibration
button is activated.
6. Click Auto Calibration. Auto calibration of gray levels begins: this procedure may take
more than 2 minutes.
2.1.1.2 Gray level calibration with Vi-800G gray scale
The calibration with gray scale compensates for gamma variations from one camera to
another. The calibration includes 3 passes:
First pass calibrates the lighting power. The machine measures the gray plate for each
lighting.
Second pass calibrates the camera’s gamma response. The machine measures 20
different shades of gray.
Third pass calibrates the lighting power with the gamma correction active.
1. Click Gray levels button in TEST MACHINE window for automatic adjustment of con-
veyor width.
2. Insert the calibration tool in the machine.
3. Once the gray tool is inside the machine and the camera is automatically placed
above, the Gamma correction window is brought up. The AOI system then measures
the gray level for each lighting type.
Test machine