RS-1_instruction manual.pdf - 第673页

Pa r t 2 D et ai l ed Des c r i pt i o n of Ea c h F unc t i o n Chapte r 6 G e neral - Purpose Vision Co mpone nt 6- 42 Limi ta ti ons of a gene ra l - pur po se vis i on c om pon en t 6.6 1. Quantity - U p to 20 elem e…

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Part 2 Detailed Description of Each Function Chapter 6 General-Purpose Vision Component
6-41
3. Component example 2
Component appearance and element group positions
<Image of a component displayed on the
component monitor: Bottom view>
<Top view>
Summary of the input data
Element
Group Name
First element position (Layout)
Missing
Elements
Element Element Offset
Element
dimensions
Inspection
ELG0001 X: 0
Y: -6
Z: 0
θ: 0
Tolerance: all values are
set to “0.”
Point Type: Side
Reference pos.: Bottom
Center
Polarity: Bright
Offset: all values
are set to “0.”
Tolerance: all
values are set to “0.”
Light data:
Transmittance light
ELG0001 X: 6
Y: 0
Z: 0
θ: 90
Tolerance: all values are
set to “0.”
Point Type: Side
Reference pos.: Bottom
Center
Polarity: Bright
Offset: all values
are set to “0.”
Tolerance: all
values are set to “0.”
ELG0001 X: 0
Y: 6
Z: 0
θ: 180
Tolerance: all values are
set to “0.”
Point Type: Side
Reference pos.: Bottom
Center
Polarity: Bright
Offset: all values
are set to “0.”
Tolerance: all
values are set to “0.”
ELG0001
X: -6
Y: 0
Z: 0
θ: 270
Tolerance: all values are
set to “0.”
Point
Type: Side
Reference pos.: Bottom
Center
Polarity: Bright
Offset: all values
are set to “0.”
Tolerance: all
values are set to “0.”
Fourth element group
Second element group
Third element group
First element group
Part 2 Detailed Description of Each Function Chapter 6 General-Purpose Vision Component
6-42
Limitations of a general-purpose vision component 6.6
1. Quantity
- Up to 20 element groups can be defined per component.
- Only one extended array group can be defined per component.
- The maximum number of lead elements that can be defined per element group is 384, and
that of ball elements is 6936.
These numbers include missing leads/balls.
- One corner/side/mark element should be defined per element group respectively.
- The maximum number of ball elements that can be defined per extended array group is 256.
- Up to four blocks of missing elements can be defined per element group.
If you want to define five or more blocks of missing elements, divide the element group into
two or more groups.
- Up to 6936 balls can be defined per component.
- Up to four corners/sides and up to three marks can be defined per component.
- The total number of element groups that can be handled with one production program is up to
1,024.
- The total number of extended array groups that can be handled with one production program
is up to 256.
2. Combination
- Both a lead element and a ball (or land) element cannot be defined for one component at the
same time.
- Combination of elements that are seen under the same light only can be defined for one
component.
- Both an element group and an extended array group cannot be defined for one component at
the same time.
3. Lead components
- At least one element group including two or more leads has to exist on a component.
- As the lead size, the ratio of the length to width should be 1 or more. For a gull-wing lead,
the ratio of the length to the length specified in the “Lead size” should be 1 or more.
Length
Length
Width
Width
Normal lead
Gull-wing lead
The length of a lead
should be longer than
the width.
- 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.
P1
P2
Ｌ
Ｈ
<TOP VIEW>
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
H ≦ 0.5 P1 and H ≦ 0.5 P2
L ≧ 2P1 and L ≧ 2P2
- 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.
Part 2 Detailed Description of Each Function Chapter 6 General-Purpose Vision Component
6-43
W1
W2
Ｌ
<TOP VIEW>
W1: Pitch of Element group 1
PW2: Pitch of Element group 2
L: Distance between two element groups in
the longitudinal direction
L ≧ W1, ≧ W2 and L ≧ 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.
<TOP VIEW>
First element group
Second element group
Pitch 1
Pitch 2
- If you specify only the limited leads of one lead group, we cannot guarantee their recognition
precision.
- 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.
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.
Ｌ
D1
D2
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,
L ≧ 2D1 and L ≧ 2D2
<BOTTOM VIEW>
- 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.