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SIPLACE 80S-20/F4/F5 User M anual 5 Vision Func tions 05/99 Issue from Software Version SR.405.xx 5.7 Guidelines for D escribing Package F orms Line en gineer 5 - 147 5.7.8.2 Pseudo color represent ation The pseudo c olo…
5 Vision Functions SIPLACE 80S-20/F4/F5 User Manual
5.7 Guidelines for Describing Package Forms 05/99 Issue from Software Version SR.405.xx
5 - 146 Line engineer
5.7.7.6 General Information on Setting Illumination Values
– As a rule it is better to overilluminate the component than to underilluminate it. A saturated image is prefer-
able to a low-contrast image.
– Optimum illumination is attained when only the leads are imaged and the component body is not shown.
– If you cannot clearly separate the image of the component body from the leads, we recommend to illumi-
nate body and leads equally and then to measure the outline.
5.7.8 Setting the Components Illumination at the 6x Revolver Head
Camera (Standard vision system)
5.7.8.1 General Information on Illumination Methods
The idea of illumination setting is to obtain an image of the leads of a component which is as high-contrast as
possible. At the same time it is also important to suppress representation of the body of the component.
These instructions are intended to help you find the best possible illumination parameters. This, however,
does not imply that you rigidly comply with the values specified in these instructions. The way you should pro-
ceed is first to follow these instructions and then to adjust the parameters yourself where necessary. It may
well be that you come across one or other component the leads of which are better illuminated using values
different to the ones suggested in these instructions.
The illumination system comprises three different illumination levels. The intensities can be programmed indi-
vidually. By using the individual illumination levels one at a time or in combination with one another you can
adapt the illumination to suit a wide range of components.
Flat illumination level
The flat illumination level is used for illuminating BGAs, µBGAs, flip-chips, J-lead components (PLCC), Melfs
and components with convex-type leads. It tends to emphasize body and lead edges. It is, however, less suit-
able for displaying bright component bodies and ceramic components.
Steep illumination level
The main application for the steep illumination level is for reflective leads, ceramic components and bright
component bodies. It is less suitable for reflective component bodies, flip-chips or µBGAs.
NOTE
Most components will require a combination of these three illumination levels to achieve optimum illumination.
Using
one
illumination level will only be successful in exceptional cases.
SIPLACE 80S-20/F4/F5 User Manual 5 Vision Functions
05/99 Issue from Software Version SR.405.xx 5.7 Guidelines for Describing Package Forms
Line engineer 5 - 147
5.7.8.2 Pseudo color representation
The pseudo color representation provides a powerful and objective assessment of the illumination, by repre-
senting a brightness value in a color.
A contrast of at least 4 color scales between the lead and body is required for a measurement. In the ‘Illumina-
tion’ menu of the package form manipulator, components are displayed in the pseudo color representation on
the station computer monitor.
5.7.8.3 Settings for Illuminating Components
The standard range of components includes chips (0603 to 2220), tantalum capacitors, Melf components,
PLCCs, QFPs, SOs, SOJs, TSOPs, ICs, power components, flip-chips, µBGAs and BGAs.
For the components which are listed below the GF interpreter in the station computer uses the default illumi-
nation parameters listed in Fig. 5.7.11:
– Chips (0603 to 2220)
– Tantalum capacitors (component bodies, non-reflective)
– Melf
– PLCC, QFP, SO, SOJ, TSOP, ICs, power ICs
– Flip-chips, µBGAs, BGAs
The special components include:
– Power transistors
– Plugs
– PLCC base
– Quartz timers
As a rule you will not need to change the illumination parameters for the components.
Color scale Brightness
white light
yellow
orange
red
brown
green
light blue
blue
violet
black dark
Tab. 5.7.5 Conversion table for the pseudo color representation at the 6x revolver head
5 Vision Functions SIPLACE 80S-20/F4/F5 User Manual
5.7 Guidelines for Describing Package Forms 05/99 Issue from Software Version SR.405.xx
5 - 148 Line engineer
.
Fig. 5.7.11 Illumination parameters for components at the 6x revolver head camera (32x32)
D
iagram
f
or adjusting the illum
ination
of com
ponen
ts
C
hip
IC
M
elf
B
G
A
T
a
nta
lu
m
ca
pacitor
flat: 150
ste
ep:1
50
J-Lead
P
LC
C
flat: 70
stee
p: 140
C
eram
ic
B
G
A
flat: 0
steep
:
255
P
la
stic
B
G
A
080
5 an
d
la
rge
r
fla
t: 20
0
stee
p
: 120
0603
fla
t: 1
50
steep
: 2
00
G
e
neral
fla
t:
1
20
steep
: 1
50
flat: 2
5
5
stee
p: 1
3
0
fla
t: 2
00
steep
:
0
G
ullw
ing
S
O
,
S
O
T
,
T
S
O
P
Q
F
P
,
S
pe
cial com
p
one
nts
P
ow
er
tra
nsistor
flat: 25
5
stee
p: 15
0
P
LC
C
-
socket
fla
t: 0
- 30
s
te
ep
:1
50
-20
0
P
lug
flat:
0
ste
ep
: 15
0
-2
0
0
Q
ua
rtz
fl
a
t: 200
ste
ep
:1
20
-18
0
T
B
G
A
re
flect. b
od
y
fla
t: 2
00
stee
p: 0
T
B
G
A
dull
fla
t: 0
ste
il:1
50
-20
0
a
p
prox. 1
80
2
5
5
If n
e
cessa
ry,
u
se
th
e
L
U
T
b
elo
w
1
R
eflect.
body
fla
t: 25
5
ste
e
p
: 4
0
8
6
2
7
5
3
4
6
1
2
3
4
5
D
o not use fo
r reflective com
pon
ents.
U
se negative
ball contrast w
hen
m
apping the ball.
T
he description
m
ust only contain
the innerm
ost row
of balls. U
se nega
tive contrast.
It
m
ust be possible t
o insert the com
po
nents. T
he test m
u
st be carried out for each type.
7
T
h
e edge of the large cooling surface is extrem
ely irregul
ar on som
e types o
n account of the production m
ethod
s used.
I
f you are unsure, do not use it for the m
easurem
ent
U
p to P
LC
C
52 b
ase. M
ake sure th
at you are using the correct nozzle.
D
escribe as for a
B
G
A
, if necessary
.
8
D
escribe as f
or an F
D
C
. M
easu
ring m
ode: size+
le
ad
1
50
2
55
C
o
ntrast
g
ra
d
ua
tio
n