Nordson_EFD_OptiSure_Operating_Manual - 第13页

OptiSure Automated Optical Inspection 13 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide. Using Image Thr eshold Image Threshold allows y…

OptiSure Automated Optical Inspection

12 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.

Overview of the OptiSureAOI Functions

Click the Arrow icon, then right-click in the Primary View screen to view the Arrow menu.

Arrow Menu Item Description Refer to...

Delete All

Deletes all arrows associated with a mark image. n/a

Image

Threshold

Allows you to isolate a speciﬁc portion of an image

for future adjustment; the isolated portion remains

visible on the screen when you are adjusting the

parameters in an Arrow dialog box:

• Recommended for use in tandem with any Arrow

Type

• Provides more accurate results than Template /

Area

“Using Image

Threshold” on

page13

Add New

Arrow

Adds an arrow to a mark image; added arrows can be

manipulated individually or collectively to improve the

system’s ability to ﬁnd a mark image, or to optically

check a dispense.

Select the arrow type to use based on the

characteristics of the mark image.

“Using the Arrow

Types” on page14

Color

Changes the color of the on-screen arrows, circles,

and other visual aids of the Arrow functions.

n/a

Location of the Arrow icon on the Camera tab (turns yellow when selected) and the resulting menu when you right-click in the

Primary View screen

OptiSure Automated Optical Inspection

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Using Image Threshold

Image Threshold allows you to view changes to a mark image as you make adjustments. This feature can be used

alone or in tandem with an Add New Arrow function. Nordson EFD recommends ﬁrst using Image Threshold before

using some of the Arrow Type functions, so that you can view the changes to the image on the screen.

NOTE: A quicker alternative to using Image Threshold is to use the Threshold slider inside each Arrow Type dialog

box. If you want to use the quicker method, do not enable Image Threshold.

PREREQUISITES

 The mark image you want to adjust is saved in the Mark Library.

# Click Step Reference Image

> >

• Click CAMERA to go to the camera

screen.

• Click the ARROW icon.

• In the Primary View screen, right-click

and select IMAGE THRESHOLD.

The Image Threshold window opens.

2 • In the Image Threshold window, select

the Enable checkbox.

• Adjust the Image Threshold settings

until you have successfully isolated

the mark. Refer to “Image Threshold

Window Parameters” for details.

3 • Click OK to save the adjustments or

click CANCEL to exit without saving.

Image Threshold Window Parameters

Parameter Function

Enable

If checked, enables the Image Threshold function.

Gray Low Adjusts the minimum value of the threshold — the lower the setting, the

less visible the image will be; when a valid setting is entered, the image is

visible on the screen.

Range: 0–255 (0 is full dark; 255 is full white)

Gray High

Adjusts the maximum value of the threshold — if the maximum value is

exceeded, the image will not be visible; when a valid setting is entered, the

image is visible on the screen.

Range: 0–255

Erosion

Reduces and then enlarges the image to remove impurities (as long as

Dilation First is not checked).

Dilation

If checked, enlarges and then reduces the image to remove impurities.

OptiSure Automated Optical Inspection

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Using the Arrow Types

The Add New Arrow icon accesses advanced features that allow you to:

• Add details to a mark image to improve the system’s ability to match the mark image to the corresponding

location on a workpiece.

• Verify the width, length, or depth of a dispense based on parameters saved in a mark image.

There are ﬁve types of arrow function, shown below. An example procedure for using each function is provided.

Arrow Menu Type Selection Recommended Use Refer to...

Circle Center

Create a mark image that deﬁnes the

center of a circular area with poorly deﬁned

boundaries.

“Circle Center

Example” on

page23

Gravity Point

Create two mark images on a line so that you

can use Fiducial Marks to ensure that line

dispenses are made down the center of a line,

regardless of its thickness.

“Gravity Point

Example” on

page18

Intersect Line

Create a mark image for a workpiece that

does not have any obvious marks for the

system to ﬁnd; in this case, you must use the

upper left and bottom right corners of the

workpiece to create marks.

“Intersect Line

Example” on

page37

Mea. Point To

Line

Create a mark image that allows you to

measure the width between any two points

on a line. Then, using the Arrow Check Point

command, the system can check the width

between the speciﬁed points; if the width

does not meet the criteria speciﬁed within the

mark image, the system takes the speciﬁed

action.

“Mea. Point To

Line Example” on

page43

Continued on next page

Accessing the Add New Arrow function on the Camera tab, and the resulting AOI Arrow parameter window

NOTE: Refer to “AOI Arrow

Window Elements” on

page16 for details.

NOTE: AOI measurements

are displayed here, and will

stay on the screen even if you

click outside the AOI feature.

However, if you click Needle XY

Adjust, Score will replace the AOI

measurement.