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4.3.4 Teaching in TEACHING Mode
In TEACHING mode, you can make and save the following settings for each product type:
•
Exposure time: 0.03 to 50.00 ms
•
Inspection area size/position: Sets the area for searching the registered color
•
Color: Registers the color existing most in the color extraction area
•
Template area size/position: Sets the area for specifying the image to be registered
•
Base image (template): In an extraction image, saves the information about the image within the
template area
Type of teaching
There are following two ways of performing a teaching:
•
Teaching for OK products only
•
Teaching for OK and NG products
When performing a teaching, the allowable limit for the distance set in JUDGEMENT CRITERIA SETTING
mode is automatically set, but the distance varies depending on the type of teaching. See the table below
Type Allowable range to be automatically set
Teaching for OK products only Sets to the template position detected during teaching (+/- 5%)
Teaching for OK and NG
products When the limit for NG product is lower than that for OK product (short
distance):
•
Plus: Distance value when executing a te 5%
•
Minus: Median between the distance values for OK product and NG
product
When the limit for NG product is higher than that for OK product (long
distance):
•
Plus: Median between the distance values for OK product and NG
product
•
Minus: Distance value when executing a teaching – 5%
Notice on teaching
After changing to TEACHING mode, set each item and press the TRIGGER button to execute a teaching.
The processing flow of the unit is as follows:
Capture the image
Adjust the exposure time Extract the color Save the template
Capture the image
Perform the test Display the degree of similarity
As the processing flow shown above, after saving the template, the LightPixAE20 captures a new image
and perform the test. If any image within the allowable limit does not detected, teaching is not properly
completed. The unit recognizes that teaching is unsuccessfully completed and outputs the ALARM signal. In
this case, you have to perform a teaching from the beginning again
If the first captured image is different from the one captured during the test, there is a high possibility of
teaching failure. After starting a teaching, do not move the object until the completion of teaching
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