Table of Contents
Advertisement
Operation Examples (Position measurement)
Continued from the preceding page
(11) Measuring the positional deviation
Press the TRG/BRT key, and the result of measuring the positional deviation (absolute position)
from the stored positioning mark image will be displayed.
(TYPE00)
OK
MEAS. XXXXXXms
3
MEAS0 CAM1 POS-DEVIATION
REGST NO.0(0~7)
X COORD.(MDL0)X= 379.0 OK
Y COORD.(MDL0)Y= 214.0 OK
X DEVIAT(MDL0) X= -001.0 OK
Y DEVIAT(MDL0) Y= +000.0OK
MATCH
X0~6
MSR-CHNG REG-CHNG PC-MONTR SET-SCRN MANL-TYP-CHG
*1
The final evaluation result will be displayed as "OK" in the upper left corner of the screen when
all of the items have been evaluated acceptable.
*2
"MATCH:+09735" means that the degree of match (percentage of pixels that match) between
pixels in the new image and the stored image is 97.35%.
[The acceptance and rejection criteria based on the degree of match]
In order to evaluate acceptability based on the degree of match, first an image of a good
specimen is stored for reference. Then, an image of defective specimen is compared for
degree of match. Finally an image of another good specimen is compared. These
comparisons establish the degree of match to be used for setting the limits used for working
comparisons.
For example, the degree of match for a non-defective object is 90% or more and that for a
defective object is 70% or less, then the threshold value for degree of match can be set to
approx. 85%. This allows the evaluation acceptability to be made.
*3
When the final evaluation result is OK, Y0 is turned ON, and a filled box is displayed. (When
the result is NG, an empty box is displayed.)
When the auxiliary relay C112 is turned ON, Y0 is turned ON according to the condition set in
step (9) for final evaluation output.
(MDL0)
+09735 OK
Y0~7
:
:
*3
If there is a single unacceptable item, "NG" will be displayed.
F H C1ALLC2NO
[Display of measured result]
VX.X
Final evaluation result (*1)
Measuring time
Center coordinates of new image
window, and judgment result
Deviation of the new object in the
window and final evaluation
Degree of match (*2)
Search window
Positioning mark
Image window
BUSY
:
3-14
Advertisement
Table of Contents
