KE2040Instruction Manual Ver2.01,REV04.2003.6.25 - 第418页

5 − 74 4. Ball components - At least one ball g roup consist ing of three or more balls of the same size should exist on a component. - W hen the similar size of ball/land g roups (t he diameter ratio should be less than…

5 − 73

- When a lead end (lead end position) of one lead element group is laterally

located near another lead element group, whose lead end height is almost the

same with that of the former lead element group (that is, the height difference

should be 0.5 times of the pitch or less), the centers of the adjacent two leads

should be located far from one another by two times of the pitch. For an

element group that has only one lead, the center of one group should be far

from that of another one by two times of the lead width. If a lead-like shaped

substance is located near a lead, they should be far from one another in the

same manner.

- If another lead group is located in the longitudinal direction of a lead of one

lead group, it should be far from the lead by the distance equal to the lead

width and at least by 1 mm.

- In any case: if you define all lead groups or if you define only certain groups

to recognize them, you have to follow the two requirements described just

above.

- For a connector on which two types of leads are arranged alternatively: long

one and short one, you can define two groups: a group of long leads and that

of short leads. You can define these lead groups even though they overlap

one another if leads themselves do not overlap each other. The requirements

on the lead distance described above are not applied to these lead groups

unless bent leads of the different groups do not overlap.

- If you specify only the limited leads of one lead group, we cannot guarantee

their recognition precision (due to the Version 1.10 limitations).

- You cannot define one lead for two different groups. You cannot define leads

that overlap each other. Note that you happen to define leads in these ways

if you set the wrong lead pitch, number of leads and/or lead width.

- You cannot specify an inner lead as the lead element type. If you specify in

this way, we cannot guarantee the recognition precision (due to the Version

1.10 limitations).

Ｌ

Ｈ

P1: Pitch of Element group 1

P2: Pitch of Element group 2

L: Distance between two element groups

H: Difference between lead ends of two element

groups

≧

0.5 P1 and H

≧

0.5 P2

≧

2P1 and L

≧

2P2

Ｌ

W1: Pitch of Element group 1

PW2: Pitch of Element group 2

L: Distance between two element groups in

the longitudinal direction

≧

W1,

≧

W2 and L

≧

1 mm

First element group

Second element group

Pitch 1

Pitch 2

5 − 74

4. Ball components

- At least one ball group consisting of three or more balls of the same size

should exist on a component.

- When the similar size of ball/land groups (the diameter ratio should be less

than 1.5) are located closely, the center of one group should be far from that of

another group by 2 times of the ball/land diameter or more.

- In any case: if you define all ball groups or if you define only certain groups to

recognize them, you have to follow the requirement described above.

- For a staggered type of BGA, you can define it as two square-grid ball groups.

In this case, you can specify these two groups even though these ball groups

overlap one another. However, any ball of these groups should not overlap

with each other, and the centers of two adjacent balls of each group should be

located far from on another by 1.5 times of their diameters.

- If you specify only limited balls of one ball group, we cannot guarantee their

recognition accuracy (due to the Version 1.10 limitations).

- If the diameter check precision is the diameter ± 50 % or less, the recognizable

pitch and recognizable ball diameter are limited greatly.

- A rectangular land should be a square. (Note that the machine may

recognize an element as a lead if the ratio of the lead width to the lead length

of a rectangular land is 1 : 1 or less.)

- You cannot define a ball for two different ball groups. You cannot define balls

that overlap each other either. Note that you happen to define balls in these

ways if you set the wrong ball pitch, number of ball lines and/or ball diameter.

Ｌ

D1: Ball diameter of Element group 1

D2: Ball diameter of Element group 2

L: Distance between the centers of the two

adjacent balls

When D1 < 1.5D2 or D2 < 1.5D1,

≧

2D1 and L

≧

2D2

D: Ball diameter

L: Distance between the

centers of two adjacent balls

L >= 15

Element

roup 2

Element

roup 1

5 − 75

5. Outline-recognized components

- If you define an outline-recognized component with only one type of element

(corner, side or mark) other than a lead and ball, you have to specify two or

more corresponding elements. If you specify another type of element also,

you only have to specify one corresponding element (excluding a side).

- Up to four corners can be specified for this type of component. Note that you

cannot specify two or more corners whose specified angle is the same (theta

offset).

- If another corner or an element (lead, rectangular land or rectangular mark)

having a corner whose angle is the same is located near one corner element,

they should be far from one another by 4 mm or more provided that the

standard VCS is used.

(Since an intersection point outside the outer frame is regarded as a corner

due to the Version 1.10 limitations, two corners (or corner-shaped substance)

should be far from one another by 4 mm or more also.)

- Up to four sides can be specified per component. However, note that two or

more sides whose specified angle is the same (theta offset) cannot be

specified per component. A side should be located on the outer frame, and

its length should be half or longer of the dimension of the component. When

you specify a side (sides) only as an element, include two sides that are

orthogonal

to one

another.

- Up to three marks can be specified per component.

- You can specify a hole as a circle mark of the reverse polarity (dark). In this

case, it has to be displayed as a circle clearly on the screen. (Note that a

hole may not be displayed as a circle clearly on the screen when a thick

component is to be recognized with the perspective light.)

- A mark should be located far from a similar-sized mark or similar-shaped and

similar-sized element (ball or circular land) by 5 mm or more provided that the

standard VCS is used.

6. Notes when a general-purpose vision component data format is used

- Use this format for an element group (especially lead element group) whose

positioning precision is sufficient to be recognized. When you use this format

for an element group (especially lead element group) whose positioning

precision is uncertain, a recognition error may occur frequently.

ｰ

θ270°Corner

θ0°

Corner2

θ0°

Corner1

θ90°Corner

θ180°Corner

Although there are two corners

whose theta angle is 0 degrees, you

can specify just one corner of them.

ｰ

θ270°

Side 1

θ0°

Side 2

θ0°Corner1

θ90°Side

θ180°Side

θ270°

Side 2

Although there are two sides whose

theta angle is 0 degrees and those

whose theta angle is 270 degrees

respectively, you can specify only

either of two sides whose angle is

the same.