KJ-01.02.Instruction Manual.REV.02.pdf - 第240页

6 − 36 6.5.4 Editing the BGA component user ball pattern This f unction creat es the user ball patt ern which is used for set ting t he BGA imag e recognit ion pattern in t he Vision data. The pattern dat a created with …

6 − 35

6.5.3 Ball inspection settings

This function sets details of each ball shape inspection.

• nspecting the diameter of a ball

The length and width of a ball is measured by the ball diameter inspection function.

If either of these measurements is not within the setting range, the recognition

error is supposed to occur. The diameter of a ball is inspected based on the

entered value, so enter the correct diameter of a ball. We recommend that you

specify 40 % or higher as the inspection level.

The entered value for the ball diameter is

supposed to be R. If either of 1 -( H/R) or 1 -

(V/R) is greater or smaller than the set value

(%), the ball diameter is regarded as “illegal”.

• Inspecting the variation

This means the ball area inspection. The area of a ball is converted into binary

data, then its bright pixels are counted. The threshold of the binary data is

optimized for each ball. If the number of pixels counted is smaller or larger than

the value set for the ball area which is calculated from the entered diameter value,

the recognition error occurs. The ball area which is calculated from the entered

diameter value is converted into the number of pixels, then inspected. Enter the

correct ball diameter value in the same manner as that for the ball diameter

inspection. This function performs the stricter inspection than the ball diameter

inspection, so we recommend that you specify 45 % or higher as the inspection

level.

• Inspecting lack of a ball

If you specify “Inspect of diameter” or “Inspect of variation”, the system checks

whether any ball is omitted or not. This inspection is based on the average value

of each ball brightness and the total of each ball brightness to decide if a ball

should be omitted or not. A ball which is darker than other balls is handled as

nonexisting.

Note: The system cannot check an LGA (Land-Grid-Array) component. Do not

perform any ball inspection.

Specifies whether to inspect the diameter

of a ball or not.

Enter the diameter inspection level.

The default value is 50%.

Specifies whether to check to see if the

shape of a ball is odd or not.

Enter the ball odd shape inspection level.

The default value is 50%.

Cancels the entered data, then closes this

dialog box.

Validates the entered data, then closes the

dialog box.

Ｈ

Ｖ

6 − 36

6.5.4 Editing the BGA component user ball pattern

This function creates the user ball pattern which is used for setting the BGA image

recognition pattern in the Vision data. The pattern data created with this function can

be referred together with the default pattern from the vision data on each BGA.

Figure 6.5.4.1 Overview of the ball patterns

BGA

component A

BGA

component B

BGA

component C

BGA

component D

Pattern X

Pattern Y

User pattern

Vision data

Selection of a default pattern

10 pattern area

Default pattern

Pattern selection

Pattern X

Pattern Y

6 − 37

6.5.4.1 Flow of the user ball pattern creation

Create data according to the following flow of operations:

6.5.4.2 Management of the ball pattern area

When you created a pattern on the Production program editing screen, perform

each necessary operation after selecting the pattern area. On the following dialog

box, you can edit/delete/preview each pattern data.

• The system can store up to 10 patterns in one production program as the pattern

data.

• The created pattern data can be used with several BGA vision data.

Figure 6.5.4.2.1 Ball pattern editing dialog box

Pattern name being

selected with the cursor

Pattern size being

selected with the cursor

Number of patterns

used in the Vision data

(number of

references)

Creates/modifies a

pattern.

Preview

Deletes a pattern.

Returns to the previous

screen before activating

this dialog box.

Specification of the

pattern area

Setting of the

pattern name and

Pattern editing

Ball pattern editing

dialog box

Ball pattern setting

dialog box