Omron F250-UME Software Manual page 407

EC Positioning
STEP 2: Setting Conditions for Obtaining Lines
HELP
CHECK
The Controller detects 4 lines and searches for a box. Adjust the conditions for
detecting the lines so that desired lines are detected.
Line conditions
Extract level
Specifying angle
Line angle 0
Line angle 1
Line angle 2
Line angle 3
End
Refer to the information about cross points for details (page 2-16-(19)).
Line Angles
The positions where the brightness changes are extracted as edges and the
directions of the changes in brightness are found. These directions are called
the edge codes and they indicate the directions of the edges. The way in which
black and white meet determines the direction of an edge code, and the angle
is calculated as shown below.
0°
Set the angles as a combination of the four sides of the box to be found
(angles 0 to 3).
Example: The following examples are for black boxes.
180°
225°
270°
90°
315°
0°
: 3
: OFF
Specify values if a lot of noise or
: [ 0]
foreign matter results in boxes not
:
[ 90]
being detected with stability.
: [180]
Specifying angle: Set to ON.
: [270]
Line angle @:
Setting item
Specifying angle ON, OFF*
Line angle 0
Line angle 1
Line angle 2
Line angle 3
The asterisk (*) indicates the default
setting.
Note: Angles cannot be specified when
positioning mark may rotate.
180°
90°
135°
45°
Section 2-16
Set the angles of the
lines to detect.
Selections
0 to 359 (*0)
0 to 359 (*90)
0 to 359 (*180)
0 to 359 (*270)
270°
2-16-(24)