Ccd Trigger; Outline; Setting Procedure - Sharp IV-C35M User Manual

Setting the Input/Output Conditions

21-3 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 CONDITIONS" menu (pages 21-1
to 21-17), and set item "
screen.
- There are five methods for starting the measurement when there is a change in a sampled image, i.e.
a "BIN" (binary method), an "AVG-GRAYS" (average light level method), "GRAY-SRC" (gray search)
and "EDGE DTECT" (edge detection), "COLOR DETECT" (color detection.)
Binary method
Average light
level method
Gray search
Edge detection
Color detection
- 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

How to display the setting screen
On the menu tree, select "TYPE00" and then
"OBJ-TYPE I/O," to display the OBJ-TYPE I/O
screen.
21
TRIG CCD START" and item "
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.
When the degree of match exceeds the specified value (threshold value), the
measurement will start after the trigger event is detected.
- This is useful when workpieces have complicated shading and cannot be
converted to binary or use a fixed brightness range.
Detects edge with gray search function, and the measurement is started.
Detects specified color and executes measurements.
Object type 1
Feeding direction
CCD TRIG COND" on the "OBJ-TYPE I/O"
Object type 2
Feeding direction
Trigger window
SELECT OBJECT TYPE COND
OBJECT TYPE COND
TYPE00
TYPE RUN COND
IMAGE-ADJ
MEA-CND(CAMERA1)
MEA-CND(CAMERA2)
FINAL NUM.CALC
FINAL OUTPUT COND
OBJ-TYPE I/O
OBJ-TYPE SYS.
TYPE(NEW)
21-18
COLOR F C1 BRT