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11-3 CCD trigger
(1) Outline
This function samples a specified part (trigger window) of an image captured by the CCD camera
at a high rate, and starts the measurement when the sampled image changes. Therefore, moving
objects can be measured without requiring an external trigger, such as a photo sensor.
To use this function, set the input/output the CCD trigger on the [I/O SETTINGS] menu (pages 11-
1 to 11-16), and set item 3 TRIGGER CCD START and item 4 CCD TRIGGER COND on the
[OBJECT TYPE I/O] menu. - See Item (2).
- There are two methods for starting the measurement when there is a change in a sampled
image, i.e. a binary method and an average light level method.
Binary
method
Average light
level method
- The trigger window can be set in any position for each object type.
In the past, the position of an external sensor had to be adjusted every time the object type was
changed. However, since this function eliminates the necessity of physical position adjustments,
the changeover time can be reduced.
- The internal CCD trigger can be used with camera 1. (It cannot be used with camera 2.)
- An image that can be used to set the sample window conditions is obtained when the display
mode is switched from the through mode to the freeze mode.
(2) Setting procedure
On the [MAIN OPS MENU], move the cursor to SET-SCRN, and press the SET key.
- On the [SYSTEM SETUP] menu, move the cursor to item 2
OBJECT TYPE COND and press the SET key.
- On the [OBJECT TYPE COND] menu, move the cursor to item t
SYSTEM-IN/OUT and press the SET key.
1
2
1. Move the cursor to item 3 TRIGGER CCD START with the up and down keys, and press the
SET key.
- Move the cursor to BIN or AVG-LIT-LVL with the left and right keys, and press the SET key.
When a sampled binary image changes (the white area exceeds 50%),
the measurement is started.
· A change in a binary image means a change in a binary image from
black (background) to white (workpiece) or from white (background)
to black (workpiece).
When the average light level of a sampled image enters a specified
range, the measurement is started.
Object type 1
Feeding direction
[OBJECT TYPE I/O]
1MONITOR LIGHT LVL
CAM1(1~2) NO YES
2LIGHT LEVEL COND
(TO NEXT SUB-MENU)
3TRIGGER CCD START REG.NO YES(BIN AVG-LIT-LVL)
4CCD TRIGGER COND (TO NEXT SUB-MENU)
5COMPUTER LINK OUT BLOCK-00(MESR-0 CMR01)
&SERIAL OUTPUT
6SHUTTER SPEED
1/00060(1/30~1/10000)
7STORE REF IMAGE
MOVE UP.L(224,208) LO.R (287, 271) REG. DISP
8UPPER MENU
Setting the Input/Output Conditions
Object type 2
Feeding direction
Trigger window
11-17
11
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